Petrogenesis of melt rocks, Manicouagan Impact Structure, Quebec
| Autor: | Jeffrey L. Warner, Patricia E. McGee, Robert J. Floran, C. H. Simonds, W. C. Phinney |
|---|---|
| Rok vydání: | 1978 |
| Předmět: |
Atmospheric Science
Ecology Nucleation Geochemistry Paleontology Soil Science Forestry Aquatic Science engineering.material Oceanography Debris Geophysics Impact crater Space and Planetary Science Geochemistry and Petrology Breccia Earth and Planetary Sciences (miscellaneous) engineering Plagioclase Impact structure Quartz Geology Earth-Surface Processes Water Science and Technology Petrogenesis |
| Zdroj: | Journal of Geophysical Research. 83:2773 |
| ISSN: | 0148-0227 |
| DOI: | 10.1029/jb083ib06p02773 |
| Popis: | It is suggested, on the basis of previous theoretical studies of shock waves, that the Manicouagan melt formed in 1 or 2 s in a 5-km-radius hemisphere near the point of impact. The melt and the less shocked debris surrounding it flowed downward and outward for a few minutes until the melt formed a lining of a 5- to 8-km deep, 15- to 22-km-radius cavity. Extremely turbulent flow thoroughly homogenized the melt and promoted the incorporation and progressive digestion of debris that had been finely fragmented (but not melted) to grain sizes of less than one mm by the passage of the shock waves. The equilibration of clasts and melt, plagioclase nucleation, and readjustment of the crater floor are discussed. |
| Databáze: | OpenAIRE |
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