Discovery of Balegehade Ancient Crater in Manchurian and the Research of It's Regional Tectonic Setting
Bibliographic record
Abstract
Manchuria region is located in the southern section of the Ergun block,which was heavily influenced by Pal-Asia and Pacific tectonic domain causing large scale of magmation and tectonic activities in Mesozoic. An ancient crater with geographical coordinates of longitude 116° 20. 6096' and latitude 48° 51. 4327' is first discovered at about 42 km northwest of New Barg Right Flag in Inner Mongolia during the national geological survey project in 2011. This ancient crater is covered by the Quaternary sediments and named as Balegenhade ancient crater. Circular structures and radial drainage in images of remote sensing very clearly show the cyclic volcanic necks. The lithology is mainly composed of rhyolitic volcanic breccia lava,volcanic agglomerate lava,volcanic agglomerate breccia lava and rhyolite forming several cyclothems. Three complete eruption circulations starting from explosive facies ending with overflow facies can be observed except that the top and bottom are incomplete. The explosive index is from 0. 72 to 0. 92 experiencing a gradual weakening process from below to above. Zircon U-Pb age in rhyolite ranges between 167. 8 Ma ± 3. 3 ~ 162. 2 ± 2. 1 Ma that indicates the eruptive activities took place in Middle Jurassic. The analysis of stress field shows that the direction of σ1 converted from NWW to NNW since early mesozoic to later,which reveals a tectonic transformation from ancient Asia to Pacific. The Buergan fault zone reactivated under the compressive force of NWW——SEE direction,then formed the NNE-trending Eerguna fault zone with the property of sinistral shearing and corresponding NWW-trending tensile fractures,so the conjunctions of those two sorts of faults would be the ideal space for rising magma. Therefore,those many centric craters including Balegenhade and Jiawula craters distributed like beads on NNE direction are results of the joint effect of ancient Asia tectonic and Pacific tectonic.
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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 | 0.002 | 0.001 |
| Science and technology studies | 0.001 | 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".