Bibliographic record
Abstract
Transient(within 1 second)dynamic high pressures(ca tens of to up to one hundred GPa)and high temperatures(1500℃)caused by the impact process will eventually result in the development of an astrobleme when a large meteorite impacts the earth's surface,and the surrounding rocks must undergo a special kind of metamorphism called impact metamorphism.The studies of impact tectonics include the following four topics:1.structure and morphology of the impact crater and its formation mechanism;2.impact metamorphism and impact metamorphic rocks;3.numerical simulation and experimental calculation of impact tectonics;and 4.economic benefits of impact tectonics.The studies of impact tectonics not only have academc significance but also have actual economic benefits.Vredefort-Witwatersrand in South Africa is one of the oldest impact tectonics and is also famous for its gold-uranium deposits.The Sudbury impact structure in Canada is famous for occurrence of a large syn-impact Cu-Ni deposit.Now oil and gas reservoirs related to post-impact tectonics are being explored for in a number of areas of North America and Central America.In addition,many impactites are used as building materials and many astroblemes become famous resort places,such as the Ries crater in Nordlingen,Germany.Much progress has been made in impact studies in China since the end of the 20th century.The Baisha crater found in Hainan in the early 1990s is known to the world and there are reports on possible craters such as Taihu in Jiangsu,Duolun in Inner Mongolia and Luoquanli near Xiuyan in Liaoning.However these structures remain to be further confirmed.The studies of global impact tectonics show that long-term stable cratons are favorable to discovering impact craters and many craters are hidden beneath Quaternary and older sediments.So satellite-borne photography and geophysical exploration will be effective in determining targets,and on that basis,through strengthening petrological and structural studies,impact craters may be confirmed.
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 | 0.003 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.005 | 0.011 |
| Science and technology studies | 0.001 | 0.003 |
| Scholarly communication | 0.004 | 0.010 |
| Open science | 0.002 | 0.002 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.008 | 0.002 |
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".