Deep resistivity structure of the northwest Indian Himalaya and its tectonic implications
Bibliographic record
Abstract
Long‐period magnetotelluric (MT) data were collected at 15 stations on a 250 km long profile in the northwest Indian Himalaya to study the structure of this continent‐continent collision zone. Two‐dimensional MT inversion was used to find a resistivity model that fit the data. In the upper crust low resistivity was imaged on the limbs of the Tso‐Morari dome and may originate in serpentenization or zones of graphite. The Indus Tsangpo Suture was imaged as a sub‐vertical conductive structure that dips northeast and merges with a mid‐crustal conductor. A north dipping zone of low resistivity is imaged at the top of the underthrust Indian Plate and is likely due to fluids expelled from the underthrust sedimentary rocks. North of the Indus Suture zone this layer is located at 20–25 km depth with a conductance around 3000 S. The resistivity of 5–10 Ωm can be attributed to the presence of fluids, likely partial melt or aqueous fluids. This layer is underlain by a relatively resistive Indian crust that extends from the High Himalaya to north of the Indus suture. A decrease in deep resistivity was observed at the northern end of the profile, and is similar to the structures observed further east in the region of the INDEPTH study, despite the smaller north‐south extent of the orogen in the Indian Himalaya.
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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 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 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".