Alteration vectoring to IOCG(U) deposits in frontier volcano-plutonic
Bibliographic record
Abstract
Iron Oxide Copper-Gold (±U-Ag-Co-Bi) deposits (IOCG) and the uranium-rich ones (IOCG(U)) provide a relatively new and exciting exploration opportunity in Canada. They are, however, challenging as most prospective Canadian settings are frontier felsic-to-intermediate volcano-plutonic terrains mapped prior to the recognition of the IOCG deposit-type in the 1990’s. On-going research on stunning exposures of IOCG(U) alteration patterns in the Great Bear magmatic zone (NWT) demonstrates that the hydrothermal alteration footprint related to IOCG(U) m i neralization demarcates prospective regions and, within these regions, can point to mineralization. Non-mineralized, but regionally significant alteration types include: 1) early and intensive sodic alteration distal to mineralization and most proximal to intrusive heat sources; 2) in their periphery and away from intrusions, extensive calcic-iron (magnetite-actinolite-apatite) alteration that is commonly texture-destructive and coarse-grained, and; 3) subordinate vein-type overprint or laterally-extensive mild potassic alteration. Alteration types proximal to mineralization start where intensive replacement-type K-feldspar or biotite alteration, with magnetite at first, develops. In these zones, brecciation and polymetallic sulphide enrichments are coeval to, or slightly post-date the potassic alteration. Such zones can also be affected by skarn-like calc-silicate alteration, late-stage K-feldspar overprint and hematite alteration with their associated mineralization. Porphyry copper alteration systems and some types of epithermal mineralization are also clearly associated with the significant IOCG systems. The
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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 | 0.000 | 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 | 0.000 | 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".