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

合作研究：切萨皮克湾影响结构的影响后研究：对大陆边缘演化和地下水资源的影响

• 批准号: 0506720
• 负责人: Kenneth Miller
• 金额: $ 9.51万
• 依托单位: Rutgers University New Brunswick
• 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 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0506720&HistoricalAwards=false
• 关键词: Collaborative; Research; Post; Impact; Studies

0506720MillerThis 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.

[5067 . 20]米勒本项目涉及对切萨皮克湾冲击构造（CBIS）的USGS/ICDP钻探项目的材料进行分析。ICDP和美国地质勘探局提供了资金，在弗吉尼亚州查尔斯角的CBIS中心盆地钻一个2.2公里的钻孔，目的是：1)影响研究，以限制陨石坑的结构和形态、陨石坑深度、中央陨石坑的结构特征，以及陨石坑材料的地层学、岩石物理学、化学和矿物学；2)始新统上至近段（~36 ~ 0 m）的冲击后研究；3)水文地质和深层生物圈研究。具体来说，这些资金将支持PI与新泽西州地质调查局（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、钻探后分析和查尔斯角撞击后部分的存档工作。撞击后研究的科学目标包括：1)记录约35.7 Ma撞击产生的当地生物危机和恢复，以及高能撞击的物理效应；2)陨石坑、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缘长期演化的影响评价。PI团队将重点比较查尔斯角中央盆地岩心孔与环形槽和陨石坑外钻探的岩心孔的撞击后剖面，特别是新泽西州和特拉华州的始新世上部至中新世剖面。