Platinum group elements provide no indication of a meteoritic component in ICDP cores from the Bosumtwi crater, Ghana
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منابع مشابه
Platinum group elements in the ICDP cores from the Bosumtwi crater, Ghana
Introduction: The Bosumtwi crater has a diameter of 10.5 km and is located in the center of Ghana in West Africa (6o 30’ N and 1o 25’ W). Its age is 1.05 Ma and it forms a well preserved impact structure with a well defined rim. Its center is occupied by the closed basin of Lake Bosumtwi. The target rock is essentially composed of Proterozoic (2.1 to 2.2 Ga) units of the Birimian Supergroup tha...
متن کاملBosumtwi impact structure, Ghana: Geochemistry of impactites and target rocks, and search for a meteoritic component
available online at http://meteoritics.org 1493 © The Meteoritical Society, 2005. Printed in USA. Bosumtwi impact structure, Ghana: Geochemistry of impactites and target rocks, and search for a meteoritic component Xiongxin DAI1, 4, Daniel BOAMAH1, Christian KOEBERL1*, Wolf Uwe REIMOLD2, Gordon IRVINE3, and Iain MCDONALD3 1Department of Geological Sciences, University of Vienna, Althanstrasse 1...
متن کاملIcdp Borehole Lb-07a (bosumtwi Impact Structure, Ghana): an Overview and First Multidisciplinary Results
FIRST MULTIDISCIPLINARY RESULTS. W. U. Reimold, L. Coney, C. Koeberl and R. L. Gibson, Institute of Mineralogy, Museum for Natural History, Humboldt-University in Berlin, Invalidenstrasse 43, D-10099 Berlin, Germany ([email protected]), Impact Cratering Research Group, University of the Witwatersrand, Private Bag 3, P.O. Wits, 2050 Johannesburg, South Africa ([email protected]...
متن کاملGeology and geochemistry of shallow drill cores from the Bosumtwi impact structure, Ghana
available online at http://meteoritics.org 1137 © Meteoritical Society, 2003. Printed in USA. Geology and geochemistry of shallow drill cores from the Bosumtwi impact structure, Ghana Daniel BOAMAH† and Christian KOEBERL* Department of Geological Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria †Present address: Ghana Geological Survey Department, P.O. Box M80, Accra, Gh...
متن کاملPlatinum Group Elements Analysis of Impactites from the Icdp Chicxulub Drill Core Yax-1: Are There Traces of the Impactor?
Introduction: The nature of the Chicxulub impactor is still not fully understood. Attempts to identify the traces of the impactor from chemical analyses of impactites within the crater are extremely controversial. Ir analyses of samples from the Chicxulub-1 and Yucatan-6 drill cores lead to different results. Nuggets of platinum group elements (PGE) and Ir concentration of more than 1000pg/g we...
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ژورنال
عنوان ژورنال: Meteoritics & Planetary Science
سال: 2007
ISSN: 1086-9379,1945-5100
DOI: 10.1111/j.1945-5100.2007.tb01070.x