Bibliographic record
Abstract
Introduction Komatiites exhibit a remarkable range of textures and volcanic structures. The most spectacular ultramafic lava flows have differentiated into olivine spinifex-textured upper parts and olivine cumulate lower parts. Komatiitic basalts display similar textures with pyroxene rather than olivine as the dominant mineral. Pillows, columnar jointing and, in fragmental komatiites, a variety of textures and structures produced during explosive eruption and deposition are also encountered. The textures and structures of komatiites have been described in many publications. More important early works, which dealt with komatiitic rocks in Southern Africa, Canada and Australia, include Naldrett and Mason (1968), Viljoen and Viljoen (1969a, b), Nesbitt (1971), Williams (1972), Pyke et al . (1973), Arndt et al . (1977), Nisbet et al . (1977) and Imreh (1978). The substance of these papers and the situation that existed after a decade of komatiite research were summarized by Donaldson (1982). Subsequent contributions include: excellent illustrations and descriptions of textures and structures in komatiites in the Crixas greenstone belt, Brazil, by Saboia and Teixeira (1980); detailed descriptions of the Alexo komatiite flow by Barnes (1983) and Arndt (1986a); new work on komatiites in the Quebec portion of the Abitibi belt by Mueller (2005); new descriptions of komatiite flows and lava lakes in the Yilgarn Block, Australia, by Thomson (1989), Hill et al . (1987), Barnes et al . (1988), Lesher (1989) and Dowling and Hill (1998); accounts of the field relations and textures of komatiites in the Barberton, Nondweni and Commondale greenstone belts (South Africa) by Byerly (1999), Lowe and Byerly (1999a) and Wilson et al . (1989, 2003); new and very detailed descriptions of komatiites in the type locality in the Barberton greenstone belt in South Africa by Dann (2000, 2001); and descriptions of the texturally unusual spinifex-textured komatiites on Gorgona Island, Colombia (by Aitken and Echeverria (1984) and Echeverria and Aitken (1986)).
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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 | 0.002 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.022 | 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".