Large Meteorite Impacts and Planetary Evolution IV

Melt particle characteristics of the within- and out-of-crater suevites from the Bosumtwi impact structure, Ghana: Implications for crater formation
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Published:September 01, 2010
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CiteCitation
Louise Coney, Wolf Uwe Reimold, Roger L. Gibson, Christian Koeberl, Paula Ogilvie, 2010. "Melt particle characteristics of the within- and out-of-crater suevites from the Bosumtwi impact structure, Ghana: Implications for crater formation", Large Meteorite Impacts and Planetary Evolution IV, Roger L. Gibson, Wolf Uwe Reimold
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A petrographic and geochemical comparison of suevites from the LB-07A and LB-08A cores recovered during 2004 by the International Continental Scientific Drilling Program with suevites from outside of the crater rim of the Bosumtwi impact structure indicates contrasting mechanisms of formation for these respective impact breccias. The within-crater suevites form only a small part of the lithic impact breccia–dominated impactite crater fill, in contrast to the impactites from outside of the crater, which consist solely of suevite. The clasts of suevites from within the crater display relatively low levels of shock (for most material <45 GPa). The numbers of shocked...
- Africa
- Bosumtwi Crater
- breccia
- chemical composition
- clasts
- cores
- cristobalite
- differentiation
- distribution
- ejecta
- electron probe data
- fallout
- framework silicates
- Ghana
- hydrothermal alteration
- impact breccia
- impact craters
- impact features
- impact melts
- impactites
- impacts
- International Continental Scientific Drilling Program
- mass movements
- melts
- metamorphic rocks
- metamorphism
- metasomatism
- models
- petrography
- planar deformation features
- plumes
- quartz
- shock metamorphism
- silica minerals
- silicates
- slumping
- suevite
- transport
- volume
- West Africa
- diaplectic glass