COLLABORATIVE RESEARCH: Post-Impact Studies of the Chesapeake Bay Impact Structure: Implications for Continental Margin Evolution and Groundwater Resources

合作研究：切萨皮克湾撞击结构的撞击后研究：对大陆边缘演化和地下水资源的影响

• 批准号: 0506726
• 负责人: Michelle Kominz
• 金额: $ 0.67万
• 依托单位: Western Michigan University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-08-15 至 2006-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0506726&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; Post; Impact; Studies

0506726KominzThis project involves the analysis of material from the USGS/ICDP drilling project in the Chesapeake Bay Impact Structure (CBIS). ICDP and the USGS have provided funds to drill a 2.2 km borehole in the central basin of the CBIS at Cape Charles, VA for the purposes of: 1) impact studies, to constrain the crater structure and morphology, crater depth, the structural character of the central crater, and the stratigraphy, petrophysics, chemistry, and mineralogy of crater materials; 2) post-impact studies of the upper Eocene to Recent section (~36 - 0 My); and 3) hydrogeology and deep biosphere studies. Specifically, these funds will support the PI's efforts to participate in field analyses, post drilling analyses, and archiving of the post-impact section at Cape Charles in conjunction with collaborators at the New Jersey Geological Survey (NJGS), the Delaware Geological Survey (DGS), the USGS and international institutions. The scientific goals of the post-impact studies include: 1) documentation of the impact-produced local biotic crisis and recovery at ca. 35.7 Ma and the physical effects from a high-energy impact; 2) evaluation of the effects of cratering, other tectonic, sea-level, climate and sediment supply changes on the long-term evolution of the mid-Atlantic continental margin. The PI's team will focus particularly on comparing the post-impact section from the Cape Charles central basin corehole with coreholes drilled in the annular trough and outside the crater, especially well-dated upper Eocene through Miocene sections in New Jersey and Delaware.

0506726 Kominz该项目涉及对切萨皮克湾撞击构造（CBIS）中USGS/ICDP钻探项目的材料进行分析。 ICDP和美国地质勘探局提供资金，在弗吉尼亚州查尔斯角的CBIS中央盆地钻了一个2.2公里的钻孔，目的是：1）撞击研究，以确定陨石坑结构和形态、陨石坑深度、中央陨石坑的结构特征以及陨石坑物质的地层学、岩石物理学、化学和矿物学; 2）上始新世至现代剖面（~36 - 0 My）的撞击后研究; 3）水文地质学和深层生物圈研究。 具体而言，这些资金将支持PI与新泽西地质调查局（NJGS）、特拉华州地质调查局（DGS）、美国地质调查局（USGS）和国际机构的合作者一起参与现场分析、钻后分析和查尔斯角撞击后部分的存档。 撞击后研究的科学目标包括：1）记录撞击造成的当地生物危机和恢复。35.7 2）评价撞击坑、其他构造、海平面、气候和沉积物供应变化对中大西洋大陆边长期演变的影响。 PI的团队将特别关注比较来自查尔斯角中央盆地岩心孔的撞击后部分与环形槽和陨石坑外钻取的岩心孔，特别是新泽西和特拉华州的早始新世至中新世部分。