Deep-Tow Surveys of Atlantic Diapirs and Carbonate Escarpments: Geomorphology, Geochemical Processes and Geological Consequences

“大西洋底辟和碳酸盐悬崖的深井调查：地貌学、地球化学过程和地质后果”，由Paull和其他沿西佛罗里达悬崖的其他人早期的工作发现，冷水卤水渗漏(1)支持孤立生物群落的化学合成；(2)对碳酸盐台地底部的侵蚀有贡献。越来越多的证据表明，与大陆边缘的排放相比，沿着扩张山脊的壮观喷口水的排放在体积上可能相形见绌。在这项提案中，PI计划使用Deep-Tow将对疑似盐水渗漏的调查扩大到佛罗里达州的东侧。将对两个地区进行调查：佐治亚州外大陆隆起上的底辟和布莱克-巴哈马断裂带的底部。底辟冲破海底，将进行以下检查：(1)确定带到海底的孔隙流体和沉积物的化学成分；(2)确定这种排放对局部侵蚀和生物的影响。将沿着陡峭的布莱克-巴哈马陡峭的陡峭地带检查侵蚀的性质，并评估构造、底流和化学破坏的可能贡献。

"Deep-Tow Surveys of Atlantic Diapirs and Carbonate Escarpments: Geomorpholgy, Geochemical Processes and Geological Consequences" Earlier work by Paull and others along the West Florida Escarpment discovered cold water brine seeps that (1) support chemosynthesis in isolated biologic communities; and (2) 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. In this proposal the PI plans to use Deep-Tow to extend investigations of suspected brine seeps to the eastern side of Florida. Two regions will be surveyed: a diapir on the continental rise off Georgia, and the base of the Blake-Bahama Escarpment. The diapir breaches the seafloor, and will be examined (1) to establish the chemistry of pore fluids and sediments brought to the seafloor, and (2) 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.