Cooperative NSF-USGS Drilling in the Delmarva Peninsula: The Effects of Variations in Global Sea-Level Tectonic Subsidence, and Sediment Supply on Sequence Architecture

NSF-USGS 在德尔马瓦半岛的合作钻探：全球海平面构造沉降和沉积物供应变化对层序结构的影响

• 批准号: 9909179
• 负责人: Kenneth Miller
• 金额: $ 28.33万
• 依托单位: Rutgers University New Brunswick
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-15 至 2003-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9909179&HistoricalAwards=false
• 关键词: Cooperative; NSF; USGS; Drilling; Delmarva

EAR-9909179MillerSuccessful drilling onshore in the New Jersey Coastal Plain and offshore on the NJ shelf and slope has provided: 1) ages for major Late Cretaceous - Cenozoic sequence boundaries; 2) causal links between the formation of sequence boundaries and the growth of ice sheets between 42 and 10 Ma, and hints that such a link exists in the older, supposedly "ice-free" world; 3) preliminary estimates of the amplitudes of global sea - level changes; 4) evaluation of links among sequence stratigraphic architecture, global sea-level variations, and margin evolution; and 5) constraints on the causes of major global events in Earth history, including the middle Eocene-earliest Oligocene global cooling, the late Paleocene thermal maximum, the K/T boundary, early and late Maastrichtian events, and the Cenomanian/Turonian carbon extraction event. Drilling onshore in New Jersey has met fundamental goals, but has also raised fundamental questions that can be answered by drilling in the Delmarva peninsula. Drilling near Bethany Beach, DE will provide: 1) the first detailed record of upper Miocene-Pliocene (10 - 2) Ma sequences in this region; 2) downdip late Eocene to Pliocene sequences needed for eustatic estimates; 3) a stratigraphic reference section for the late Eocene Chesapeake Bay impact. This project will take advantage of an opportunity for joint funding and collaboration with the USGS by drilling a borehole on the coast near Bethany Beach, DE that will not only yield a late Eocene-Pliocene record of marine sequences, but also will provide a critical test of tectonic changes in subsidence on the Atlantic margin. The USGS Eastern Regional Mapping Team (ERMT) drillers will continuously core a 1500-1600 ft. borehole as part of a developing cooperative project with Rutgers, NSF, and allied partners (New Jersey Geological Survey, LDEO, USGS Water Resources, CNRS (France), WHOI, Delaware and Maryland Geological Surveys). Most direct drilling costs are already secured (USGS/NJGS/DGS); this award only provides science support costs and minimal drilling costs to deepen the hole for the P.I.s purposes. ***

在新泽西海岸平原和新泽西陆棚和陆坡近海的成功钻探提供了：1）晚白垩世-新生代主要层序界面的年龄; 2）层序界面的形成与冰盖生长之间的因果关系在42 ~ 10 Ma之间，并暗示这种联系存在于更古老的、被认为是“无冰”的世界;（3）全球海平面变化幅度的初步估计：（4）层序地层结构、全球海平面变化和边缘演化之间的联系评价;（5）对地球历史上重大全球事件成因的制约，包括始新世中期-渐新世早期全球变冷、古新世晚期热盛期、K/T界线马斯特里赫特早期和晚期事件，以及Cenomanian/Turonian碳提取事件。 在新泽西的陆上钻探已经达到了基本目标，但也提出了一些基本问题，这些问题可以通过在德尔马瓦半岛钻探来回答。 在DE贝瑟尼海滩附近钻探将提供：1）该区域中新世-上新世（10 - 2）Ma层序的首次详细记录; 2）海平面变化估计所需的下倾晚始新世至上新世层序; 3）晚始新世切萨皮克湾撞击的地层参考剖面。 该项目将利用与美国地质勘探局联合资助和合作的机会，在特拉华州贝瑟尼海滩附近的海岸钻一个钻孔，不仅将获得晚始新世-上新世的海洋层序记录，而且还将提供大西洋边缘沉降构造变化的关键测试。 美国地质勘探局东部区域测绘队（ERMT）钻探人员将连续取芯1500-1600英尺。作为与罗格斯大学、国家科学基金会和相关合作伙伴（新泽西地质调查局、LDEO、美国地质调查局水资源部、法国国家科学研究中心、WHOI、特拉华州和马里兰州地质调查局）正在开展的合作项目的一部分， 大多数直接钻探成本已经得到保证（USGS/NJGS/DGS）;该奖项仅提供科学支持成本和最低钻探成本，以加深P.I.s目的的孔。***