Collaborative Research; NSF-NJGS Drilling of the Greenhouse World: The Cretaceous Transect

合作研究；

• 批准号: 0307101
• 负责人: Michelle Kominz
• 金额: $ 4.31万
• 依托单位: Western Michigan University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0307101&HistoricalAwards=false
• 关键词: Collaborative; Research; NSF; NJGS; Drilling

0307101KominzSuccessful drilling onshore in the New Jersey Coastal Plain (by the PI and his colleagues) and offshore on the NJ shelf and slope (ODP) 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 evidence that such a link exists in the older, supposedly "ice-free" world; 3) 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. Backstripping results of sequences at Bass River and Ancora, NJ accounts for the effects of sediment loading, compaction, paleodepth, and basin subsidence, providing a new eustatic estimate. The PI's studies indicate that large (25m) and rapid (1m.y.) eustatic variations occurred in the Late Cretaceous Greenhouse world. This requires that either small ice sheets paced sea-level changes during this time, or our understanding of causal mechanisms for global sea-level change is fundamentally flawed. Foraminiferal oxygen isotope changes are consistent with a glacioeustatic cause. This award will allow the PIs to take advantage of an opportunity for joint funding and collaboration with the New Jersey Geological Survey (NJGS) and the US Geological Survey (USGS) by drilling a borehole on the coast of NJ near Manasquan, NJ that will provide the thickest marine Upper Cretaceous section in the region and tie to offshore MCS profiles obtained in 2002. These seismic profiles cross thick marine Upper Cretaceous strata, revealing sequence stratigraphic geometries for this Greenhouse interval; drilling at Manasquan will provide detailed age and facies controls on these seismic sequences. In addition, the NJGS is funding drilling costs for Upper Cretaceous targets at Millville, NJ (1500 ft) and Batsto, NJ (1500 ft.). Together, these 5 sites will provide updip-downdip and along-strike transects that will fully characterize the ages, facies, and distribution of Late Cretaceous sequences.The USGS Eastern Earth Surface Processes Team will drill a 1600 ft. borehole at Manasquan; and will follow this with a 1500-1600 ft. borehole at Batsto in Spring 2004

0307101 Kominz在新泽西沿海平原成功陆上钻探（由PI和他的同事）和近海的NJ陆棚和斜坡（ODP）提供了：1）主要的晚白垩世-新生代层序界面的年龄; 2）42 ~ 10 Ma之间层序边界的形成与冰盖生长之间的因果关系，以及这种联系存在于更老的年代的证据，全球海平面变化幅度的估计; 4）层序地层结构、全球海平面变化和边缘演化之间联系的评价;（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。 在巴斯河和Ancora，新泽西州的层序回剥结果占沉积物负荷，压实，古深度和盆地沉降的影响，提供了一个新的海平面变化的估计。 PI的研究表明，大型（25米）和快速（1百万年）晚白垩世温室世界出现了海平面变化。 这就要求，要么是小冰盖在这段时间内加速了海平面的变化，要么是我们对全球海平面变化的因果机制的理解存在根本性的缺陷。 有孔虫氧同位素的变化与冰川海平面变化的原因是一致的。 该合同将使PI能够利用与新泽西地质调查局（NJGS）和美国地质调查局（USGS）联合资助和合作的机会，在新泽西州马纳斯泉附近的新泽西州海岸钻探一个钻孔，该钻孔将提供该地区最厚的海洋上白垩纪剖面，并与2002年获得的海上MCS剖面相联系。 这些地震剖面穿过厚的海相上白垩统地层，揭示了该温室层段的层序地层几何形状;在马纳斯泉钻探将提供这些地震层序的详细年龄和相控。 此外，NJGS正在为新泽西州米尔维尔（1500英尺）和新泽西州巴茨托（1500英尺）的上白垩纪目标提供钻井费用。 这5个地点将共同提供上倾-下倾和沿走向的断面，这些断面将充分表征晚白垩世层序的年龄、相和分布。在马纳斯泉钻孔;并将遵循这一1500-1600英尺。2004年春季在Batsto的钻孔