Neogene Segmentation of a Carbonate Megaplatform by Strike- Slip and Related Extension Tectonics and Paleogateway for Neogene Initiation and Strengthening of Caribbean Current

新近纪碳酸盐岩巨型台地的走滑和相关伸展构造分段以及新近纪加勒比海流启动和加强的古门户

• 批准号: 9212635
• 负责人: Albert Hine
• 金额: $ 13.31万
• 依托单位: University of South Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-04-01 至 1995-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9212635&HistoricalAwards=false
• 关键词: Neogene; Segmentation; Carbonate; Megaplatform; Strike

An enormous carbonate megabank formed and thrived on the Nicaragua Rise in the Oligocene and early/middle Miocene, portions of which form the segmented platform/basin geometry seen today. Current intensification caused by this platform blocking the northward flow of the Caribean Current resulted in widespread unconformities in the Florida-Bahamas region. The present study will connect three previous study sites by a network of high- resolution seismic profiles. Dredging of exposed outcrops and piston coring will provide samples of the older substrata. Eventually an ODP drilling program will be proposed for the Nicaragua Rise, based partly on the results of this program.

渐新世和中新世早/中的尼加拉瓜隆起形成并繁荣了一个巨大的碳酸盐巨型银行，其中部分形成了今天看到的分段台地/盆地几何形状。 该平台阻碍了加勒比海流向北流动，导致海流增强，导致佛罗里达-巴哈马地区出现广泛的不整合面。 本研究将通过高分辨率地震剖面网络连接三个先前的研究地点。 疏浚裸露露头和活塞取芯将提供较旧基质的样本。 最终，尼加拉瓜隆起的 ODP 钻探计划将部分基于该计划的结果而提出。