The Contribution of Magnetite to the Induced Polarisation Response of the Centenary Orebody
Bibliographic record
Abstract
The Centenary gold deposit is a concealed ore body containing over 2 million ounces of gold, located 80 km east of Leinster. 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 IP were trialled soon after discovery.The gravity showed major structures and delineated the magnetic dolerite, and a trial IP survey detected a significant chargeability anomaly over Centenary. Interestingly, the anomaly was broader than, and slightly displaced from, mineralisation. An honours study commenced to determine whether magnetite contributed to the chargeability response of the Centenary ore body, as historical petrophysics had suggested magnetic dolerite proximal to the ore body may be chargeableThe petrophysical study, integrated with the 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 lower chargeabilities. This supported a hypothesis that rocks containing both magnetite and pyrite at Centenary generate a larger IP response than rocks containing pyrite or magnetite alone.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| 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".