The contribution of magnetite to the induced polarization response of the Centenary orebodyFN1
Why this work is in the frame
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Bibliographic record
Abstract
Abstract. The Centenary gold deposit is a concealed ore body located 110 km north of Leonora, Western Australia. The orebody is associated with sulphides and is hosted in the magnetic portion of the Mount Pickering Dolerite. Due to its sulphidic nature, both gravity and induced polarization (IP) were trialled soon after discovery. The gravity survey showed major structures and delineated the host magnetic dolerite, and a trial dipole–dipole IP and resistivity survey detected a significant chargeability anomaly over Centenary. Interestingly, both forward and inverse models showed an IP anomaly that was broader than, and displaced from, mineralisation. Down hole IP and resistivity surveys also showed an elevated chargeability response shallower and broader than the intersected mineralised zone. Pyrite is the main sulphide associated with Centenary and is spatially related to gold mineralisation. These data therefore suggested that pyrite was not the sole contributor to the chargeability response of Centenary. Petrophysical results, integrated with examination of thin sections, found that the five samples giving the highest chargeability response contained at least 5 % pyrite and 5 % magnetite, and at least 15 % magnetite and pyrite combined. Samples with comparable amounts of pyrite, but less magnetite, gave a lower chargeability response. This supports a hypothesis that rocks containing both magnetite and pyrite at Centenary can generate a larger IP response than rocks containing pyrite or magnetite alone.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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 it