Petrological and Geochemical Analyses of Impact Breccias and Melts Recovered by the Chicxulub Scientific Drilling Project (CSDP), Mexico

国际大陆科学钻探计划(ICDP)正在资助在墨西哥尤卡坦半岛的希克苏鲁布陨石坑钻一个2公里的洞。美国国家科学基金会正在资助美国调查人员分析希克苏鲁伯科学钻探项目(CSDP)的岩心样本。奇须鲁陨石坑是世界上最大的陨石坑之一，与6500万年前白垩纪-第三纪(K/T)界线的大灭绝事件有关。作为CSDP科学团队的一部分，PIS将为更广泛的科学界提供关于核心的一般描述，以便他们可以为他们的研究索取适当的样本。他们还将提供一套初步的详细分析，以表征核心中的撞击岩性，以更好地了解奇克苏鲁布陨石坑的形成，它在大约10万年的时间里冷却时的热演变，以及它可能对环境造成的后果。该项目将包括对幸存的目标岩性和撞击事件的冲击变质产物进行岩石学、化学和同位素分析。

0207658KringThe International Continental Scientific Drilling Program (ICDP) is funding the drilling of a 2km hole in the Chicxulub impact crater on the Yucatan Peninsula in Mexico. NSF is funding US investigators to analyze core samples from the Chicxulub Scientific Drilling Project (CSDP). The Chicxulub crater is one of the world's largest impact craters and has been linked to the mass extnction event at the Cretaceous - Tertiary (K/T) boundary ~65 million years ago. As part of the CSDP Science Team, the PIs will provide a general description of the core for the broader scientific community, so that they can request appropriate samples for their studies. They will also provide an initial set of detailed analyses to characterize the impact lithologies in the core to better understand the formation of the Chicxulub crater, its thermal evolution as it cooled over a period of ~100,000 years, and the consequences it may have had for the environment. The project will include petrographic, chemical, and isotopic analyses of surviving target lithologies and shock-metamorphosed products of the impact event.***