The geology of Hawkesbury Island, Skeena mining division, British Columbia
Bibliographic record
Abstract
Hawkesbury Island is in the Skeena Mining Division of British Columbia. It is underlain by Coast Intrusions, younger lamprophyre dykes and older metamorphic rocks. The latter form part of the Ecstall septum or roof pendant. The metamorphic rocks are mainly amphibolites and quartz-feldspar gneisses. A few bands of quartzite, crystalline limestone, kyanite-staurolite-almandine mica schist and other rock types are present. These rocks have been formed by dynamothermal metamorphism of the regional type. They generally have assemblages indicative of the staurolite-quartz and kyanite-muscovite-quartz subfacies of the almandine amphibolite facies. Shear zones are strongly sericitized. Small percentages of sericite and chlorite are common throughout the metamorphic rocks. These minerals have been formed during retrogressive metamorphism. Apart from a few small metamorphosed igneous bodies, these rocks were originally a thick eugeosynclinal sequence consisting mainly of tuffaceous sediments and semi-pelitic or arkosic sediments. The metamorphic rocks have probably undergone at least two periods of deformation, so that their structure is complex. However, the foliation has a general trend of north 50° west to north 70° west in the northern part of the septum and of north 20° east to north 55° east in the southern part. The Coast Intrusions have reached their present positions by The Coast Intrusions have reached their present positions by intrusion. They have not been formed by granitization in situ. Some assimilation of the country rock has occurred but this is a marginal feature. The Coast Intrusions have had little affect on the grade of metamorphism of the metamorphic rocks.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.002 | 0.003 |
| Science and technology studies | 0.005 | 0.001 |
| Scholarly communication | 0.002 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.033 | 0.004 |
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".