Deep drilling in the Dabie‐Sulu Ultrahigh Pressure Metamorphic Belt, China
Bibliographic record
Abstract
One of the most exciting geologic discoveries in the last 20 years is the finding of the presence of a major ultrahigh pressure (UHP) metamorphic belt in the Dabie‐Sulu region of eastern China. In this belt, high‐grade continental crustal rocks contain both diamond and coesite [ Xu , 1987; Xu et al ., 1992; Yang et al ., 1999], clear evidence of crustal subduction to depths >150 km. This belt formed by collision between the North China and Yangtze blocks in the Mesozoic between about 240 and 220 Ma. Recent work has identified an older, parallel belt on the north side of the Dabie‐Qinling Mountains dated as Ordovician (˜500–440 Ma) [ Yang et al ., 2001, 2002]. This older belt extends northwestward for nearly 4000 km through the Qilian Mountains into northern Tibet, where it is offset by the left‐lateral Altyn Tagh Fault (Figure l). In the Dabie‐Sulu region, the rocks consist chiefly of granitic gneiss, paragneiss, eclogite, and garnet peridotite, whose protoliths are supracrustal rocks with a formation age of about 800–1800 Ma.
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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) | 0.009 | 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".