KOMATIITIC INVASIVE LAVA FLOWS, KAMBALDA, WESTERN AUSTRALIA
Bibliographic record
Abstract
Komatiite–substrate contacts have been reassessed at Kambalda, Western Australia, the type locality of komatiite-hosted Nisulfide ore deposits. The majority of the lower contacts between komatiite lava and sedimentary substrate are planar and rarely show evidence of erosion, marginal autoclasis and peperite formation. Rarely, komatiites have irregular and peperitic upper margins, with apophyses into the surrounding sedimentary rocks that are locally soft-sediment-deformed, indicating a shallow, synsedimentary intrusive origin. The restriction of these synsedimentary intrusive bodies to domains of thicker sedimentary substrate, the lack of komatiitic dykes, and the abundance of komatiite lava flows in the Kambalda region suggest that the synsedimentary intrusive bodies are of invasive flow origin, i.e., due to burrowing of lava flows into the underlying wet, unconsolidated to semiconsolidated sedimentary substrate. Invasive flows can be explained by the much higher density of komatiitic lava (up to 2.75 g/cm 3 ) compared to unconsolidated water-saturated pelitic sediments (1.5–2.0 g/cm 3 ). The higher density and resultant negative buoyancy caused komatiites to load and burrow into the unconsolidated sediments.
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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) | 0.021 | 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; both teacher heads agree on what is shown here.
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".