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Record W2137215126 · doi:10.2113/gscanmin.41.2.353

A LAM ICP MS STUDY OF THE DISTRIBUTION OF GOLD IN ARSENOPYRITE FROM THE LODESTAR PROSPECT, NEWFOUNDLAND, CANADA

2003· article· en· W2137215126 on OpenAlexafffundvenueabout
J. G. Hinchey, D. H. C. Wilton, M. Tubrett

Bibliographic record

VenueThe Canadian Mineralogist · 2003
Typearticle
Languageen
FieldComputer Science
TopicGeochemistry and Geologic Mapping
Canadian institutionsMemorial University of Newfoundland
FundersNatural Sciences and Engineering Research Council of Canada
KeywordsArsenopyriteGeologyGeochemistryMineralogyArchaeologyGeographyMetallurgyMaterials science

Abstract

fetched live from OpenAlex

L'indice de Lodestar, dans la partie orientale de Terre-Neuve, contient des concentrations importantes d'or dans des breches magmatiques-hydrothermales polymictes mineralisees en sulfures. La teneur maximale, 58.5 g/t d'or, caracterise un echantillon quelconque d'arsenopyrite massive. Les echantillons d'autres mineraux du minerai sulfure, la pyrite, par exemple, ne montrent pas de teneurs comparables. Nous en deduisons que l'or serait directement lie a l'arsenopyrite. Les echantillons contenant des sulfures ont ete etudies avec une batterie de techniques analytiques. Les developpements recents d'analyse in situ par ablation au laser avec plasma a couplage inductif et spectrometrie de masse (LAM-ICP-MS) ont mene a de nouvelles observations a propos de la distribution des elements traces dans les mineraux. Les analyses LAM-ICP-MS ont ete faites pour determiner si l'or est distribue de facon homogene dans les sulfures, en particulier l'arsenopyrite, ou s'il se presente sous forme de micropepites. Les resultats LAM-ICP-MS demontrent que l'indice Lodestar contient des concentrations d'or atteignant 201 g/t. L'or est reparti de facon homogene dans la structure de l'arsenopyrite, sans effet de micropepites. Les autres sulfures, la pyrite et la chalcopyrite, par exemple, contiennent des teneurs en or tres faibles. Les teneurs en or de l'arsenopyrite dans des echantillons individuels varient, probablement en fonction des teneurs en arsenic. Parce que nous n'avons pas pu deceler l'or par les autres techniques micro-analytiques, cet element doit etre incorpore chimiquement dans la structure; on pourrait donc le qualifier d'or invisible.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

How this classification was reachedexpand

Full frame machine prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: metacan-v3-hybrid-931329e0061cValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Observational · Consensus signal: none
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.065
Threshold uncertainty score0.132

Distilled classifier scores by category (both heads)

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0010.001
Science and technology studies0.0020.000
Scholarly communication0.0010.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0010.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.013
GPT teacher head0.192
Teacher spread0.180 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.

The models applied no category: nothing in the taxonomy fit this work.
Study designObservational
Domainnot available
GenreEmpirical

How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".

Quick stats

Citations32
Published2003
Admission routes4
Has abstractyes

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