Kinematics of Tertiary to Quaternary intracontinental deformation of upper crust in the Eastern Cordillera, southern Central Andes, NW Argentina
Bibliographic record
Abstract
To elucidate factors controlling the geometry of, and kinematics associated with, prominent upper‐crustal structures in the Eastern Cordillera of NW Argentina, structural analyses of key areas were complemented by fault slip analysis, remote sensing and 3D representation of prominent faults. The analyses revealed that deformation during Tertiary to Quaternary times was accomplished mostly by prominent orogen‐parallel reverse faults, the geometry of which was significantly influenced by Paleozoic and Cretaceous planar structures. Locally, this deformation was preceded by kilometer‐scale doming of upper‐crustal rocks. Analysis of 767 brittle faults at 67 stations in the studied areas indicates that local upper‐crustal doming and orogen‐parallel reverse faults formed chiefly under NW‐SE and E‐W shortening. Shortening directions inferred from fault slip data portray the kinematics of first‐order faults and folds. More specifically, shortening directions are mostly uniform with respect to first‐order structures. Age and kinematics of deformation inferred from brittle fault analysis in the study areas is consistent with equivalent data compiled from other parts of the Eastern Cordillera, Puna and Pampean Ranges. Collectively, the data is at variance with hypotheses relating late Tertiary to Quaternary deformation in the Eastern Cordillera to plate (boundary) kinematics. The kinematics of intracontinental deformation in the southern Central Andes points to deformation partitioning of upper crust as a consequence of bulk E‐W shortening. We, therefore, caution the usage of brittle fault‐kinematics in continental interiors as an indication for plate‐kinematic changes.
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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) | 0.001 | 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 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".