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.

一个巨大的碳酸盐巨型银行形成并蓬勃发展， 尼加拉瓜渐新世和早中新世/中中新世海隆，部分 形成了今天所见的分段台地/盆地几何形状。 这个平台阻塞了 加勒比洋流向北的流动导致了广泛的 佛罗里达-巴哈马地区的不整合面 本研究 将通过一个高- 分辨率地震剖面 裸露露头的疏浚， 活塞式取芯将提供较老地层的样品。 最终将提出一个ODP钻井计划， 尼加拉瓜崛起，部分基于这一计划的结果。