-
36浏览
-
0点赞
-
0收藏
-
0分享
-
252下载
-
0评论
-
引用
期刊论文
Evidence for episodic expulsion of hot fluids along faults near diapiricstructures of the Yinggehai Basin, South China Sea
Marine and Petroleum Geology 18(2001)715-728,-0001,():
Diapiric structures are well developed and occur in most of the central part of the Yinggehai Basin, on the western side of the South China margin. A strong thermal anomaly due to hot fluid flows occurs in the diapiric zone, as evidenced from vitrinite reflectance (Ro), clay mineral transfomation, mid fluid inclusion homogenization temperatures. This anomaly results from hydrothermal fluid flow along vertical faults from overpressured compartments into the overlying Late Miocene and Quaternary smld rich layers. The magnitude of thermal mlomaly is related not only to the distance to which the vertical fault is hydraulically open, but the permeability of rocks interconnected with the faults, intense heat transfer for convection of fluids occurs in the smld rich intervals adjacent to vertical faults. Abnormal orgmfic matter maturation, together with rapid transformation of clay minerals, which occurs at certain intervals within the present day normally pressured system mid normal conductive temperatures in a diapir, can be used to identify palaeo high pressure zones. Abnomal high temperatures measured from a drill stem test in a diapir can be inferred to be the results of recent expulsion of hydrothermal fluid flow. The results of this study suggest that thermal fluid expulsion along faults plays ml important role in the modification of thermal regimes, the enhancement of organic matter maturation, and rapid transformation of clay minerals, as well as the accmnulation of hydrocarbons in diapiric structures of the Yinggehai Basin, South China Sea.
【免责声明】以下全部内容由[解习农]上传于[2009年03月20日 10时20分32秒],版权归原创者所有。本文仅代表作者本人观点,与本网站无关。本网站对文中陈述、观点判断保持中立,不对所包含内容的准确性、可靠性或完整性提供任何明示或暗示的保证。请读者仅作参考,并请自行承担全部责任。
本学者其他成果
同领域成果