The Heterogeneous Mantle Transition Zone Beneath the Tarim Craton and Adjacent Region: Insight Into the Thermal Processes by the Cenozoic Reactivation
Bibliographic record
Abstract
Abstract The Tarim craton of central Asia, a stable continental block sandwiched between the Tianshan orogen and the Tibetan Plateau, has experienced significant tectonic reactivation due to the Cenozoic India‐Eurasia collision. Previous tomographic studies have identified lithospheric subduction along the Tibet‐Tarim and Tianshan‐Tarim boundaries. However, it is unclear what the fate of the subducted lithosphere is, and how much of it is subducted or detached into the mantle transition zone (MTZ). To investigate these issues, we use the recently deployed portable seismic array inside the Tarim Basin, along with stations in the surrounding regions, to estimate the structure of MTZ with receiver function analysis. Our key findings include: (a) An anomalously thickened MTZ beneath eastern Tarim, confirmed through systematic sedimentary and crustal correction tests to represent a detached cold lithospheric slab rather than near‐surface artifacts; (b) A locally thinned MTZ (∼6 km thinner than the global average) beneath central Tarim, possibly due to hot mantle upwelling potentially triggered by peripheral slab subduction; (c) Along the Tianshan orogen, MTZ thickness variations (thin in western vs. thick in central sections) resemble previous observations, while contrasting MTZ characteristics between Pamir (relatively thin) and Hindu Kush (thickened) regions suggest different slab penetration depths beneath these two regions.
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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 | 0.001 | 0.001 |
| 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) | 0.001 | 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".