Paragenesis of Barium Silicate Mineralization in Devonian Strata at the Gun Occurrence, the Yukon, Canada
Bibliographic record
Abstract
Abstract The Gun locality is a barium silicate mineral occurrence in the east-central Yukon Territory. The skarn hosts an abundance of rare Ba-bearing silicate minerals, several of which have so far been found only at this occurrence. Eight texturally and mineralogically distinct units with Ba silicate mineralization have been identified: (1) pluton contact zone (distinguished only by textural features), (2) relict diopside skarn unit, (3) gillespite skarn unit, (4) ronpetersonite skarn unit, (5) pellyite-sanbornite skarn unit (fine-grained, coarse-grained, and deformed subunits), (6) banded skarn unit (sanbornite-rich veinlet dominant and gillespite-rich nodular dominant subunits), (7) “muirite-Fe” skarn unit, and (8) Ba-Ca-silicate skarn unit. Minerals not previously noted as present at the Gun occurrence but identified during this study include cymrite, kinoshitalite, pabstite, kampfite, and ronpetersonite. The unknown species “notwalstromite” is identified as chemically distinct from walstromite by the presence of CO2 and Cl. The minerals present at the Gun occurrence indicate that two chemically distinct host-rock facies were contacted by the pluton, with one being silica-rich and the other carbonate-rich. Mineral composition and textures within these units provide indicators for the relative degree of exposure to the magmatic fluids and the thermal signature of the pluton. Subsequent hydrothermal alteration partially overprinted the mineral assemblages. The emplacement of the Gun pluton triggered the dissolution and destabilization of baryte and quartz in the contacted host rock to form a suite of predominantly anhydrous barium silicate minerals. Subsequent cooling led to the formation of kampfite and sulfides. The system was then hydrated and carbonated. Very late baryte mineralization is observed in veins that crosscut all other features and is interpreted to result from later fluid activity.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
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".