Deep-Tow Surveys of Atlantic diapirs and Carbonate Escarpments: Geomorphology, Geochemical Processes and Geolgical Consequences

大西洋底辟和碳酸盐悬崖的深拖调查：地貌、地球化学过程和地质后果

• 批准号: 9013406
• 负责人: Fred Spiess
• 金额: $ 26.57万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-02-15 至 1995-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9013406&HistoricalAwards=false
• 关键词: Deep; Tow; Surveys; Atlantic; diapirs

Recent oceanographic surveys by Dr. Charles Paull and others along the West Florida Escarpment discovered cold water brine seeps that support chemosynthesis in isolated biologic communities, and contribute to erosion at the base of the carbonate platform. Evidence is mounting that the spectacular discharge of hot vent waters along spreading ridges may be volumetrically dwarfed by discharge along continental margins. Dr. Speiss has been awarded funds to conduct a Deep-Tow survey in collaboration with Dr. Paull to extend investigations of suspected brine seeps to the eastern side of Florida. Two regions will be surveyed: a salt diapir on the continental rise off Georgia, and the base of the Blake-Bahama Escarpment. The diapir breaches the seafloor, and will be examined to establish the chemistry of pore fluids and sediments brought to the seafloor, and to determine the effects of this discharge on local erosion and biology. The nature of erosion will be examined along the precipitous Blake-Bahama Escarpment, and the possible contributions of tectonic, bottom current, and chemical destruction will be evaluated.

查尔斯·保尔博士和其他人最近进行的海洋学调查 沿着西佛罗里达陡崖发现了冷水卤水 支持化学合成的渗漏 社区，并有助于侵蚀的基础上， 碳酸盐台地越来越多的证据表明， 热喷口沃茨沿沿着扩张脊的排放可能 由于沿着大陆边缘的排放而体积缩小。 Speiss博士获得了进行Deep-Tow调查的资金 与保罗博士合作， 疑似盐水渗入佛罗里达东部。两 将调查的地区：大陆隆起的盐底辟 在格鲁吉亚外海和布莱克-巴哈马陡崖的底部。的 底辟破坏海底，并将进行检查，以建立 孔隙流体和沉积物的化学性质 海底，并确定这种排放对 局部侵蚀和生物学。侵蚀的性质将是 我沿着陡峭的布莱克-巴哈马陡崖， 构造、底流和底流的可能贡献 将对化学销毁进行评估。