Senses and timings of two kinds of shear in the Kangxiwar strike-slip shear zone, West Kunlun, and their tectonic significance. Geological Bulletin of China.
Bibliographic record
Abstract
Detailed field observations and microstructural studies indicate two opposite shear senses in the Kangxiwar strike-slip shear zone on the southern margin of the West Kunlun. The shear zone, consisting predominantly of khondalitic mylonite 7 km wide, shows the features of east-directed dextral strike-slip shear in the early stage and west-directed sinistral strike-slip shear in the late stage. Measurements of lattice preferred orientations (LPOs) of typical rock-forming minerals in the khondalitic mylonite in the ductile shear zone using the EBSD techniques demonstrate a (010)[001] or (100) [001] slip system for albite and a {hk0}[001] slip system for sillimanite, indicating a dextral strike-slip shear at high temperatures (650℃) and high-middle temperatures (650-550℃). The sillimanite LPO was most probably enhanced by metamorphic growth under differential stresses and shear-induced rigid rotation. However, LPOs of quartz exhibit {10ī0}a, {10ī1}a and {0001}a slip systems, indicating a west-directed sinistral shear at middle-low temperatures (550℃ to 350℃). 39Ar/40Ar and zircon SHRIMP U-Pb dating shows that the dextral ductile strike-slip shear took place in the Early Paleozoic (~445-428 Ma) whereas the sinistral shear occurred in 3 tectonothermal events (250, 203 and 101-125 Ma). In the Cretaceous, the Kangxiwar sinistral strike-slip fault joined with the Altyn Tagh sinistral fault to form a continuous huge shear zone with a length of approximately 2200 km. In addition, the formation of the transpressional domain between the Tekilik ductile thrust and the Kangxiwar strike-slip shear zone since the Cretaceous controlled the uplift of the NW margin of the Qinghai-Tibet Plateau and development of a foreland basin in the south of Tarim.
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 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 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.003 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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 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".