3D geological modelling of the Double Eagle-Black Thor intrusive complexes, McFaulds Lake Greenstone Belt, Ontario
Bibliographic record
Abstract
A 3D geological model is in development of the subsurface architecture and structural disposition of the Double Eagle (DEIC) - Black Thor (BTIC) intrusive complexes of the 'Ring of Fire' intrusive suite in northwestern Ontario. The 3D geological model is constrained by drillhole data from exploration claims, geological maps and a revised structural interpretation based on high resolution magnetic data. Gridded total magnetic field intensity grid was used to outline linear to curvilinear magnetic lows, defining a system of anastomosing shear zones that had previously been outlined on medium resolution magnetic data. Structural fabrics in drill core confirm that these shear zones define the contacts between ultramafic and gabbroic units within the intrusions, as well as the contacts with their felsic intrusive and volcanic host rocks. The Frank shear zone, which follows the northern margin of the ultramafic rock units in both intrusive complexes, displaces the chromite- and Ni-Cu-(PGE)-bearing ore zones within the DEIC for 1 to 1.5 km in a dextral apparent sense. To the south, the McFaulds shear zone overprinted the intrusive contact between the ultramafic rocks of the DEIC and its mafic-dominated volcanic host rocks. The 3D geological model will be used in an attempt to restore the displacement of the DEIC and BTIC with respect to their magmatic conduits in 3D space. This will ultimately provide new insights into the plumbing system associated with the Ni-Cu-(PGE) and chromite mineralization.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot 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.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.006 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".