Drill core log translation and laboratory assay certificate translation matter when mining exploration teams, geological consultants, investors and multilingual laboratories exchange evidence about rocks and mineral grades. To translate a mineral exploration drill log into English accurately, protect borehole IDs, collar coordinates, depths, geological observations, sample intervals, analyte names, concentrations, uncertainty qualifiers and the laboratory’s final reporting status. A fluent translation can still be wrong if a value is attached to the wrong depth.
A mineral assay report is not the same document as a geological log or a mineral resource estimate. The log describes what was observed and sampled; the laboratory certificate reports results for the submitted material; the geologist interprets the findings; a public technical disclosure uses its own standards and competent review. This guide explains how to preserve those evidence layers across languages, especially where grades, detection limits and QA/QC samples can change the interpretation.
Quick answer: identify the project and drill hole; verify collar location and downhole orientation; reproduce From–To sample intervals and IDs; distinguish core recovery, logging and analytical grade; protect units and less-than symbols; trace blanks, duplicates and standards; record revised laboratory certificates and obtain geological and numerical checks before the English version is used.
- Keep source drilling and sample IDs exactly as written.
- Do not treat a downhole interval as automatic true mineralized thickness.
- Translate ‘not detected’, ‘below detection limit’ and ‘not analyzed’ differently.
- Preserve grade units, signs, decimal places and method codes.
- Separate laboratory evidence from company interpretation and resource claims.
This page has one precise translation job
This article is a document-reading and translation guide for mineral exploration drill core logs and assay certificates, not a geology training hub or investment recommendation. It does not certify mineral resources, reserves, mine economics, environmental permits or laboratory accreditation. Actual technical judgements belong to responsible geologists, laboratories, competent persons and regulators as applicable. The translation should help them find the same facts in both languages.
A useful five-pass workflow
- Pass one: identify source documents, hole IDs, sample numbers and revisions.
- Pass two: read depth, orientation, lithology and sampling fields without interpretation.
- Pass three: translate laboratory headers, techniques, units and qualified numerical values.
- Pass four: compare QA/QC and amended reports without changing the data.
- Pass five: ask bilingual geological and data reviewers to cross-check rows and conclusions.
1. Know which mining record is being translated
Mineral exploration produces field logs, core photographs, sample dispatch sheets, assay certificates, laboratory quality reports and public exploration summaries. These documents describe related but different evidence. A drill core log records observations along a hole, while an assay certificate reports analytical results for specified submitted samples. A press release interprets a selection of information.
Worked example. A request arrives to ‘translate the gold results’ but includes only a log with visible sulphides and no laboratory assay. Calling the field estimate a confirmed gold grade would manufacture analytical evidence.
Translation control. Name the source document, author, date, stage of work and limits of what it actually establishes.
Translate this subject by separating the field’s measured or observed content from its later interpretation. Ask where know which mining record is being translated appears in the original, who authored that statement and which table or photograph substantiates it. The English version should remain auditable even when the reader knows nothing about the translator’s working assumptions. If the evidence is missing, record the gap.
2. Protect project, prospect and tenement identifiers
A project can contain several prospects, leases and drilling campaigns. Their names may be translated for readers, but the legal permit or tenement code and internal project reference should remain exactly as written. A prospect label does not by itself establish ownership, permitted activities or mineral resources.
Worked example. A drilling log carries a project code matching two nearby prospects. The correct target must not substitute a famous mine name merely because it is geographically close.
Translation control. Keep an identity table linking original names, controlled English names and unchanged codes.
A strong way to test protect project, prospect and tenement identifiers is to exchange the English paragraph with a reviewer who sees only the target file. Have that reader identify the drill hole, sample or observation involved and the source evidence needed to verify the claim. Then compare the answers with the original. The result exposes mistakes that grammatical proofreading cannot detect.
3. Match drill-hole identifiers across every file
A borehole, drill hole or collar ID is the thread joining coordinates, logs, samples, analytical results and interpretation. Similar IDs can differ by one suffix or zero. Keep those strings protected, including capitalization, punctuation and leading zeroes, and verify references in map captions as well as tables.
Worked example. Hole DDH-014 and DDH-041 appear in the same campaign. A translated caption can silently interchange the two and misstate where a high-grade sample originated.
Translation control. Use character-by-character checks and never infer the correct hole from neighboring assay values.
Keep the translation decision reversible. For match drill-hole identifiers across every file, retain identifiers, units and scope so another person can locate the same source entry. Any calculated explanation should be marked as explanatory, not silently inserted into the official certificate. If the client wants a corrected scientific result, that requires a controlled source revision rather than a translation edit.
4. Preserve coordinate reference systems and datums
Northing, easting, elevation, latitude and longitude describe location only within a stated coordinate system. Map grid zone, geographic datum and vertical reference can be essential. Translators must not convert coordinates through guesswork or label them all as generic GPS points.
Worked example. A collar table uses an engineering local grid, but the target heading says WGS84 latitude and longitude. The numbers did not change, yet their geographic meaning did.
Translation control. Copy coordinate values and reference-system names exactly; seek a survey specialist for authorized conversions.
The language risk is not merely choosing an awkward word. Misstating preserve coordinate reference systems and datums can move a value to another sample, alter the level of certainty or change the kind of evidence presented. For that reason, verify the meaning in tables, prose, captions and summaries independently, and ask qualified reviewers to resolve technical ambiguity.
5. Differentiate collar elevation and hole length
The collar elevation is the surface location’s reported height reference, while hole depth or length concerns the drilled path. For an angled hole, measured depth down the borehole is not necessarily the vertical depth of a geological feature. Translation must preserve that geometry.
Worked example. A log reports a sample at 150 metres downhole. Calling it 150 metres beneath ground surface as a vertical distance may move the interpreted sample.
Translation control. Retain measured-depth and true-depth labels separately; do not calculate a true depth without the necessary geometry.
At release, read the English text as a decision-maker would. Does differentiate collar elevation and hole length still represent the same object, place, event, figure and qualification? If the target implies an assay, approval or resource status that the source did not establish, revise it before publication. Clear communication is strongest when its limits remain visible.
6. Keep azimuth and dip signed correctly
Drilling orientation may be expressed using azimuth and inclination/dip under a documented convention. Positive and negative signs can indicate direction. Orientation values also change where downhole surveys are recorded. A translator should reproduce the source convention rather than infer universal signs.
Worked example. A hole drilled at a negative dip is translated as an upward trajectory because the minus sign disappears. All later sample positions then become misleading.
Translation control. Check angle units, sign, reference north and measurement station with the original survey file.
Translate this subject by separating the field’s measured or observed content from its later interpretation. Ask where keep azimuth and dip signed correctly appears in the original, who authored that statement and which table or photograph substantiates it. The English version should remain auditable even when the reader knows nothing about the translator’s working assumptions. If the evidence is missing, record the gap.
7. Translate ‘from’, ‘to’ and interval length accurately
Analytical intervals are commonly represented by From and To depths, with interval length calculated from endpoints in the record’s conventions. Adjacent intervals do not always form one assay or one geological domain. Preserve both endpoints, sample numbers and any stated gaps.
Worked example. Samples cover 42.0–43.0 m and 43.0–44.0 m. A careless English table says 42–44 m is one sample, merging two laboratory records.
Translation control. Do not combine intervals for convenience; label any derived composite explicitly and cite its source.
A strong way to test translate ‘from’, ‘to’ and interval length accurately is to exchange the English paragraph with a reviewer who sees only the target file. Have that reader identify the drill hole, sample or observation involved and the source evidence needed to verify the claim. Then compare the answers with the original. The result exposes mistakes that grammatical proofreading cannot detect.
8. Distinguish core recovery from mineral grade
Core recovery describes how much physical core was retrieved compared with the drilled interval under the applicable method. It does not directly express metal concentration. A high recovery percentage can coexist with low assay grade, and a low recovery interval may require cautious geological interpretation.
Worked example. A table shows 95% recovery and a separate 1.2 g/t assay. The translator writes ‘95% ore content’ by mistaking a drilling metric for chemistry.
Translation control. Translate the measured property along with its units and avoid generic ‘quality’ language.
Keep the translation decision reversible. For distinguish core recovery from mineral grade, retain identifiers, units and scope so another person can locate the same source entry. Any calculated explanation should be marked as explanatory, not silently inserted into the official certificate. If the client wants a corrected scientific result, that requires a controlled source revision rather than a translation edit.
9. Preserve lithology as a field description
Lithology describes rock types observed in core, often with grain size, textures, contacts and structures. It is an observation layer, not an assay of economic value. Translate technical rock terms using a consistent geological glossary and preserve uncertain field abbreviations until confirmed.
Worked example. A field geologist writes ‘possible altered basalt’ but the English version states ‘confirmed ore-bearing basalt’. The translation added certainty and commercial interpretation.
Translation control. Keep descriptive, tentative and interpreted geological statements at their source confidence level.
The language risk is not merely choosing an awkward word. Misstating preserve lithology as a field description can move a value to another sample, alter the level of certainty or change the kind of evidence presented. For that reason, verify the meaning in tables, prose, captions and summaries independently, and ask qualified reviewers to resolve technical ambiguity.
10. Do not merge alteration and mineralization
Hydrothermal alteration and observed mineralization can be related but describe different properties. Terms such as chloritic, sericitic, silicified, disseminated and vein-hosted need context and sometimes expert confirmation. The translator should not turn the presence of alteration into a quantified payable mineral deposit.
Worked example. The log notes quartz veining with minor visible sulphides. The target reads ‘high-grade gold vein,’ despite no gold assay being reported.
Translation control. Describe the texture and mineral observation as given; leave economic inference to qualified interpretation.
At release, read the English text as a decision-maker would. Does do not merge alteration and mineralization still represent the same object, place, event, figure and qualification? If the target implies an assay, approval or resource status that the source did not establish, revise it before publication. Clear communication is strongest when its limits remain visible.
11. Protect structural measurements and orientation
Fracture angles, foliation, bedding, vein thickness and core-axis measurements may use different conventions. A number such as 35 degrees is not meaningful without the angle reference. Where a structural feature is described only in core coordinates, do not imply it is a true in-situ orientation.
Worked example. A vein is marked 40 degrees to core axis. The translation calls it a 40-degree dip relative to horizontal, changing the geological interpretation.
Translation control. Keep ‘to core axis’, ‘dip’, ‘strike’ and their units distinct and ask a geologist where ambiguous.
Translate this subject by separating the field’s measured or observed content from its later interpretation. Ask where protect structural measurements and orientation appears in the original, who authored that statement and which table or photograph substantiates it. The English version should remain auditable even when the reader knows nothing about the translator’s working assumptions. If the evidence is missing, record the gap.
12. Use sample IDs as primary keys
A core box can contain many samples from contiguous depth intervals, and laboratory reports often identify them by unique IDs instead of coordinates. Sample identifiers should be copied without translation and checked against the submission sheet, field log and final certificate.
Worked example. A laboratory certificate has sample S00071, but the field log lists S00017 at the same interval. The mismatch must be queried, not silently normalized.
Translation control. Reconcile the ID mapping as an independent task before writing conclusions about grades.
A strong way to test use sample ids as primary keys is to exchange the English paragraph with a reviewer who sees only the target file. Have that reader identify the drill hole, sample or observation involved and the source evidence needed to verify the claim. Then compare the answers with the original. The result exposes mistakes that grammatical proofreading cannot detect.
13. Track sample types and preparation stages
Core, chips, soil, rock grab, channel sample, pulps and rejects are not interchangeable. Different sampling methods can imply different representativeness and analytical pathways. Translation should preserve the material submitted and what preparation occurred, rather than labeling all items as generic rock specimens.
Worked example. A surface grab sample is described as a systematic drill-core interval in English. The target gives readers a false impression of how it was collected.
Translation control. Use method-specific terminology and preserve the source’s sampling limitations.
Keep the translation decision reversible. For track sample types and preparation stages, retain identifiers, units and scope so another person can locate the same source entry. Any calculated explanation should be marked as explanatory, not silently inserted into the official certificate. If the client wants a corrected scientific result, that requires a controlled source revision rather than a translation edit.
14. Separate submitted, received and analyzed quantities
The field team may dispatch one mass of material, the laboratory may receive a dried amount and analyze a small aliquot. Those measurements belong to different operations. Translators should keep each stage, unit and reported precision intact when preparing bilingual documentation.
Worked example. A dispatch sheet says a two-kilogram bag was sent. A lab method notes a 30-gram fire assay charge. The target must not say the entire two kilograms were analyzed.
Translation control. Attach quantities to their procedures and do not ‘correct’ them by selecting the larger number.
The language risk is not merely choosing an awkward word. Misstating separate submitted, received and analyzed quantities can move a value to another sample, alter the level of certainty or change the kind of evidence presented. For that reason, verify the meaning in tables, prose, captions and summaries independently, and ask qualified reviewers to resolve technical ambiguity.
15. Respect chain-of-custody documentation
A chain-of-custody form records who handled, transferred and received materials, potentially including seals, timestamps and exceptions. It is not a guarantee that every possible contamination event was excluded. Translation must preserve signatories, handover sequence and any broken-seal notation.
Worked example. A bag was accepted with damaged packaging. An English summary that says ‘sealed and intact’ contradicts the receiving observation.
Translation control. Record status as received, not as someone later wished it to have arrived.
At release, read the English text as a decision-maker would. Does respect chain-of-custody documentation still represent the same object, place, event, figure and qualification? If the target implies an assay, approval or resource status that the source did not establish, revise it before publication. Clear communication is strongest when its limits remain visible.
16. Understand the analytical laboratory’s role
A laboratory reports methods, sample preparation, analytes, detection ranges and results under its own procedures. The exploration company then interprets those data. The translator must distinguish the laboratory’s original measurements from the client’s geological narrative and maintain the certificate revision.
Worked example. A company summary calls a result ‘significant’. The certificate only provides a numerical assay. The adjective belongs to interpretation, not the lab.
Translation control. Preserve who measured a value and who later judged its importance.
Translate this subject by separating the field’s measured or observed content from its later interpretation. Ask where understand the analytical laboratory’s role appears in the original, who authored that statement and which table or photograph substantiates it. The English version should remain auditable even when the reader knows nothing about the translator’s working assumptions. If the evidence is missing, record the gap.
17. Keep method names distinct
Fire assay, atomic absorption, ICP methods and other techniques can have different preparation, detection and reporting characteristics. A method code should not be expanded from memory if the laboratory uses a proprietary definition. Translations should keep the code visible with the lab’s verified explanation.
Worked example. A sample result uses a code that seems to indicate acid digestion, but the actual lab key describes a different preparation. The mistranslation misstates what was measured.
Translation control. Check the certificate’s method appendix and scope before rendering abbreviations.
A strong way to test keep method names distinct is to exchange the English paragraph with a reviewer who sees only the target file. Have that reader identify the drill hole, sample or observation involved and the source evidence needed to verify the claim. Then compare the answers with the original. The result exposes mistakes that grammatical proofreading cannot detect.
18. Treat assay results as measurements, not resource estimates
A laboratory may report concentrations in submitted material. Whether an interval forms an economic resource requires much more geological and technical work. A single high value is not proof of a mineable deposit, and a translation should not inflate the status of exploration results.
Worked example. One narrow interval reports elevated copper. The target-language sales brochure calls it a declared reserve although no resource estimate appears in the source.
Translation control. Translate only the reported analytical result and keep resource classifications with their actual qualified source.
Keep the translation decision reversible. For treat assay results as measurements, not resource estimates, retain identifiers, units and scope so another person can locate the same source entry. Any calculated explanation should be marked as explanatory, not silently inserted into the official certificate. If the client wants a corrected scientific result, that requires a controlled source revision rather than a translation edit.
19. Check units such as ppm, percent and grams per tonne
Metal grades can be reported in parts per million, parts per billion, percent, grams per tonne or other units. Their conversion can be mathematically straightforward in some contexts, but the displayed original unit and measurement basis must remain recognizable. A lost decimal or percent sign can change the magnitude drastically.
Worked example. A table reports 0.15% copper and a separate 0.15 g/t gold value. Writing 0.15% gold by row shift creates a completely different claim.
Translation control. Verify analyte, concentration, unit and sample ID together rather than proofreading columns independently.
The language risk is not merely choosing an awkward word. Misstating check units such as ppm, percent and grams per tonne can move a value to another sample, alter the level of certainty or change the kind of evidence presented. For that reason, verify the meaning in tables, prose, captions and summaries independently, and ask qualified reviewers to resolve technical ambiguity.
20. Preserve less-than values and detection limits
A result such as ‘<0.01’ is often a censored observation related to a reporting limit, not an exact zero. Other qualifiers may show values above the calibrated upper range or require reanalysis. Translate inequality symbols and explanatory footnotes exactly, without replacing qualified results by convenient integers.
Worked example. A sample has gold reported below a detection limit. The translation shows ‘zero gold,’ which asserts a stronger finding than the laboratory made.
Translation control. Distinguish not detected, not analyzed, below reporting limit and missing result as separate states.
At release, read the English text as a decision-maker would. Does preserve less-than values and detection limits still represent the same object, place, event, figure and qualification? If the target implies an assay, approval or resource status that the source did not establish, revise it before publication. Clear communication is strongest when its limits remain visible.
21. Keep high-result reruns and overlimit methods visible
A laboratory may reanalyze samples that exceed a method’s reporting range or use a different technique for high concentrations. The second result and its method cannot always be swapped into the original column without an explicit lab rule. Maintain both report identifiers and supersession instructions.
Worked example. An early result has an ‘over limit’ flag; a later certificate provides an exact value using another method. A translation loses the revised method and incorrectly presents the first result as exact.
Translation control. Show the sequence of result, flag, rerun and revised report, citing the source for the accepted value.
Translate this subject by separating the field’s measured or observed content from its later interpretation. Ask where keep high-result reruns and overlimit methods visible appears in the original, who authored that statement and which table or photograph substantiates it. The English version should remain auditable even when the reader knows nothing about the translator’s working assumptions. If the evidence is missing, record the gap.
22. Use blanks to describe contamination checks
Analytical blanks help detect possible contamination during sampling or laboratory processing, depending on how they were prepared and inserted. A blank result is not a sample from a barren geological zone. Translate the blank’s function and laboratory outcome without calling it an ore grade.
Worked example. A blank sample gives an unexpected metal value. The translation calls this evidence of mineralization in the blank location, although it is quality control material.
Translation control. Keep QC samples separate from geological samples in every table and graph.
A strong way to test use blanks to describe contamination checks is to exchange the English paragraph with a reviewer who sees only the target file. Have that reader identify the drill hole, sample or observation involved and the source evidence needed to verify the claim. Then compare the answers with the original. The result exposes mistakes that grammatical proofreading cannot detect.
23. Explain certified reference materials narrowly
Certified reference materials or other standards may be inserted to assess analytical performance against known reference values. The company or laboratory should evaluate them using the applicable method and criteria. Translators should not mark a whole analytical batch as acceptable merely because one control entry looks close.
Worked example. A QC reference sample has a reported recovery. The target converts the figure into a guarantee that all geological results are perfectly accurate.
Translation control. Preserve reference IDs, values, uncertainties and acceptance statements as recorded.
Keep the translation decision reversible. For explain certified reference materials narrowly, retain identifiers, units and scope so another person can locate the same source entry. Any calculated explanation should be marked as explanatory, not silently inserted into the official certificate. If the client wants a corrected scientific result, that requires a controlled source revision rather than a translation edit.
24. Understand duplicates and sample splits
Field duplicates, coarse duplicates, pulp duplicates and lab analytical repeats test different portions of variability. They may be assigned blinded codes. The translator should preserve the relationship where the source discloses it but not infer that equal names mean identical physical material.
Worked example. A pulp duplicate differs modestly from its original. The English commentary labels it an entirely new drill interval, misrepresenting the sample design.
Translation control. Label duplicate type and reference sample separately, and ask a QA reviewer about significance.
The language risk is not merely choosing an awkward word. Misstating understand duplicates and sample splits can move a value to another sample, alter the level of certainty or change the kind of evidence presented. For that reason, verify the meaning in tables, prose, captions and summaries independently, and ask qualified reviewers to resolve technical ambiguity.
25. Keep QC acceptance criteria attached to their owner
Companies and laboratories may use their own stated thresholds, warning levels and investigations for quality-control samples. A failure flag, accepted batch or rejected batch requires source evidence. Do not invent a universal percentage tolerance or treat all anomalies as proof of invalid results.
Worked example. A chart highlights a blank above a project alert threshold. The translation says the entire drilling campaign failed, though the source documents only a triggered review.
Translation control. Preserve the stated criterion, reviewer, corrective decision and revision status.
At release, read the English text as a decision-maker would. Does keep qc acceptance criteria attached to their owner still represent the same object, place, event, figure and qualification? If the target implies an assay, approval or resource status that the source did not establish, revise it before publication. Clear communication is strongest when its limits remain visible.
26. Differentiate reported interval from true width
A mineralized length measured along a drill hole is not automatically the true thickness of a geological body. Some exploration releases state true width is unknown or provide an estimate with assumptions. Keep that qualification visible when translating both assay tables and narrative summaries.
Worked example. A ten-metre downhole interval becomes a ten-metre true ore thickness in the target. The apparent small wording change may materially mislead a reader.
Translation control. Use the original geometry term and avoid making geological calculations beyond the source.
Translate this subject by separating the field’s measured or observed content from its later interpretation. Ask where differentiate reported interval from true width appears in the original, who authored that statement and which table or photograph substantiates it. The English version should remain auditable even when the reader knows nothing about the translator’s working assumptions. If the evidence is missing, record the gap.
27. Do not generate composite grades from raw rows
A weighted average over multiple sample intervals needs explicit interval lengths, treatment of missing values, capping or other rules where applicable. Translators can check arithmetic but should not publish a new composite as if it were an original laboratory result.
Worked example. Three samples show different grades and lengths. The source gives no combined result, yet the English text averages them without weighting and calls it official.
Translation control. Keep raw assays and any authorized calculated composites in visibly separate layers.
A strong way to test do not generate composite grades from raw rows is to exchange the English paragraph with a reviewer who sees only the target file. Have that reader identify the drill hole, sample or observation involved and the source evidence needed to verify the claim. Then compare the answers with the original. The result exposes mistakes that grammatical proofreading cannot detect.
28. Respect precision and significant figures
Decimal places may reflect reporting precision, detection method and data export settings. Adding zeros to look professional or rounding small values can change the sense of the result. Decimal comma conventions can also confuse international readers, particularly when CSV files are involved.
Worked example. A value 0.009 is rounded to 0.01 and crosses a stated internal threshold. The source number was not formally amended.
Translation control. Preserve source precision and any symbol; show a clarified number format only when it cannot be confused with a corrected result.
Keep the translation decision reversible. For respect precision and significant figures, retain identifiers, units and scope so another person can locate the same source entry. Any calculated explanation should be marked as explanatory, not silently inserted into the official certificate. If the client wants a corrected scientific result, that requires a controlled source revision rather than a translation edit.
29. Translate logging abbreviations with a controlled glossary
Field shorthand for lithology, minerals, alteration, structures and sample conditions may differ among projects. Build a project-specific bilingual glossary using the legend and technical reviewers. A familiar-looking abbreviation should not be expanded by guesswork, especially where it could change rock type.
Worked example. A two-letter code means a locally defined alteration class, not the universal mineral name the translator remembers. The target produces a wrong geological description.
Translation control. Retain unresolved abbreviations, provide source context and seek a geologist’s approval before standardizing.
The language risk is not merely choosing an awkward word. Misstating translate logging abbreviations with a controlled glossary can move a value to another sample, alter the level of certainty or change the kind of evidence presented. For that reason, verify the meaning in tables, prose, captions and summaries independently, and ask qualified reviewers to resolve technical ambiguity.
30. Keep maps, figures and photos aligned
Core photographs and geological cross-sections may show tray numbers, depth blocks, scale bars and annotations. The target language should preserve every label’s relationship to its image. A translated caption can be semantically wrong if it points to the preceding photograph or adjacent drill hole.
Worked example. The caption for hole one appears under a photograph of hole two after page reflow. The texts both read well but the evidence mapping fails.
Translation control. Verify artwork, labels, scales and figure cross-references after final typesetting.
At release, read the English text as a decision-maker would. Does keep maps, figures and photos aligned still represent the same object, place, event, figure and qualification? If the target implies an assay, approval or resource status that the source did not establish, revise it before publication. Clear communication is strongest when its limits remain visible.
31. Maintain version control across assays and public releases
Laboratories sometimes amend certificates after review, while a company’s technical report or news release may reflect different cut-off dates. A translated release should state which record edition it uses and not quietly splice an updated number into a superseded interpretation.
Worked example. An assay value is corrected in a later lab report but the target uses the old date and new figure. Readers cannot trace the result to one authenticated source.
Translation control. Keep source revision, publication date, appendix reference and any supersession statement together.
Translate this subject by separating the field’s measured or observed content from its later interpretation. Ask where maintain version control across assays and public releases appears in the original, who authored that statement and which table or photograph substantiates it. The English version should remain auditable even when the reader knows nothing about the translator’s working assumptions. If the evidence is missing, record the gap.
32. Read exploration reporting frameworks cautiously
Public reporting standards such as the JORC Code address communication of exploration results, mineral resources and ore reserves in their relevant jurisdictions. A translation of field data does not itself satisfy public reporting obligations. Equally, not every private field log is a public JORC report.
Worked example. A drill-core certificate is relabeled ‘JORC-certified reserve report’ because a client wants more authority. That phrase makes a claim the laboratory cannot support.
Translation control. Preserve the source’s actual reporting status and refer investor-facing classification to competent professionals.
A strong way to test read exploration reporting frameworks cautiously is to exchange the English paragraph with a reviewer who sees only the target file. Have that reader identify the drill hole, sample or observation involved and the source evidence needed to verify the claim. Then compare the answers with the original. The result exposes mistakes that grammatical proofreading cannot detect.
33. Handle confidential and culturally sensitive location data
Drilling documents may contain exact coordinates, commercial exploration plans, land access details, contractors’ identities and information relevant to local communities. Translation is not permission to publish sensitive site data. Supply only authorized content to external vendors or automated systems.
Worked example. A translator shares a live drill plan in a public forum to clarify an abbreviation, exposing locations that the client had not released.
Translation control. Use a synthetic example for training and maintain protected originals for authorized review.
Keep the translation decision reversible. For handle confidential and culturally sensitive location data, retain identifiers, units and scope so another person can locate the same source entry. Any calculated explanation should be marked as explanatory, not silently inserted into the official certificate. If the client wants a corrected scientific result, that requires a controlled source revision rather than a translation edit.
34. Work a fictional gold-and-copper drill interval
Imagine a mineral exploration report with a hole collar table, downhole sample IDs, core recovery notes, a log of quartz veins, gold results in g/t, copper results in percent and QC samples in the laboratory batch. The task is to keep field observations and analytical results aligned without calling one sample a reserve.
Worked example. One sample reports gold below detection and another shows a numerical copper concentration. A careless target merges the rows and claims gold was found at the copper interval.
Translation control. Build a four-column trail: hole and depth, sample ID, lab result and independent interpretation, each tied to its source.
The language risk is not merely choosing an awkward word. Misstating work a fictional gold-and-copper drill interval can move a value to another sample, alter the level of certainty or change the kind of evidence presented. For that reason, verify the meaning in tables, prose, captions and summaries independently, and ask qualified reviewers to resolve technical ambiguity.
35. Finish with independent bilingual technical review
A geologist or competent mining analyst should confirm technical terminology and meaning, while a language reviewer checks completeness and readability. A data checker should separately verify sample IDs, intervals, units, signs, inequality symbols and source pages. Passing a spellcheck is not a release criterion.
Worked example. The final draft has fluent paragraphs, but one negative dip becomes positive and a less-than symbol vanishes. A numerical review catches both before circulation.
Translation control. Keep unresolved source questions in a controlled list and do not label the result final until critical fields have been checked.
At release, read the English text as a decision-maker would. Does finish with independent bilingual technical review still represent the same object, place, event, figure and qualification? If the target implies an assay, approval or resource status that the source did not establish, revise it before publication. Clear communication is strongest when its limits remain visible.
Frequently asked questions
Can a translator calculate a new composite grade?
Checking arithmetic can reveal a problem, but a new composite depends on technical choices about lengths, missing samples, limits and other rules. Do not publish it as an official source result unless an authorized geologist provides and approves it.
Is 1 ppm always the same as 1 g/t?
For mass fractions under the usual basis, those numbers can be equivalent, but context and analyte reporting basis matter. Retain the original unit in the translated record and let a qualified reviewer confirm any derived conversions.
What does a less-than symbol mean on an assay certificate?
It often indicates that the result is below a stated reporting or detection threshold. It is not an exact zero. Preserve the sign and read the laboratory notes for the applicable meaning.
Why is downhole length not automatically true width?
An angled drill hole intersects geological features along a particular path. True thickness depends on the orientation and geometry of the feature. A translation must not turn one distance into the other without a sourced calculation.
Do blanks and duplicates prove every assay is accurate?
No. They are quality-control evidence with their own design and acceptance rules. Translate the actual result and the company’s or laboratory’s stated decision, not a blanket guarantee.
Does a laboratory assay certificate establish a mineral reserve?
No. A reserve estimate requires additional geological, technical and economic analysis under relevant reporting frameworks. A lab measures submitted material; it does not certify a mineable deposit from one assay.
Should I make geological names sound familiar?
Use verified geological terms and a project glossary. Do not substitute a familiar everyday rock name if it changes the mineralogical or lithological description. Preserve uncertainty in field identifications.
Can AI tools translate the tables automatically?
They may help prepare working drafts but must not be trusted to keep every identifier, inequality, unit and row alignment correct. Use controlled handling of confidential information and independent technical review.
Authoritative background and further learning
The Australasian Joint Ore Reserves Committee’s reporting overview explains the public-reporting role of the JORC Code; it is not an assay translation certificate. The USGS geochemistry quality assurance manual illustrates the importance of documented sample handling, preparation, measurement and laboratory records. Always apply the actual method, laboratory requirements and jurisdiction relevant to a source.
The translation-specific reasoning belongs within Master Art of Translation. The protected Vocabulary and Learning Hubs cover word learning, while How English Works supports reading and explaining complex English. They are linked as distinct owners rather than recreated as new hubs.
The best final check is not whether every geology term sounds sophisticated. It is whether a reader can select any English result, locate the right hole and sample in the source, see the original unit and laboratory qualifier, and understand which statement is a measurement and which is an interpretation. A translation that survives that test is genuinely useful.