日本海天然气水合物气源成因及主控因素探讨

发布时间：2018-03-06 12:21

本文选题：气源成因　切入点：交互断层　出处：《海洋地质与第四纪地质》2017年05期 　论文类型：期刊论文

【摘要】：为了探讨日本海天然气水合物的气源成因及其控制因素,收集和整理了日本海西南郁陵盆地和日本海东缘上越盆地及邻近的相关资料。结果显示,上越盆地及邻近海域甲烷羽状流、麻坑、自生碳酸盐岩及地震剖面上"气烟囱"和BSR等发育,块状水合物出露海底为热解成因;郁陵盆地羽状流不太发育,而自生碳酸盐岩和地震剖面上的"气烟囱"较发育,钻孔发现的水合物主要为生物成因。结合日本海构造演化特征综合分析认为,日本海东缘热解成因水合物的主控因素是近S—N向和近E—W向交互断裂作用以及NE—SW向的晚期构造挤压;日本海西南海域生物成因为主兼热解成因水合物的主控因素是NEE—SWW向的晚期构造挤压;而日本海西北海域构造定型早且缺少晚期构造挤压,因此,推测其水合物气源应该主要为生物成因,热成因的可能性很小。
[Abstract]:In order to investigate the origin and controlling factors of gas hydrate in the Sea of Japan, the relevant data of Yuling Basin in the southwest of the Sea of Japan and the Shangyue Basin on the eastern margin of Japan and its adjacent areas have been collected and sorted. Methane plume, makeng, authigenic carbonate rock and BSR are developed in the Shangyue basin and its adjacent sea areas, and the gas chimney and BSR are developed in the seismic profile. The pyrolysis is caused by the outburst of massive hydrates, while the plume flow in the Yuling basin is not very developed. However, the gas chimneys in the authigenic carbonate rocks and seismic profiles are relatively developed, and the hydrates found in the boreholes are mainly biogenic. The main controlling factors of the pyrolytic hydrates in the eastern margin of Japan are the near-S-N and near E-W faults and the late tectonic compression in the NE-SW direction. The main controlling factor of biogenetic and pyrolytic hydrates in the southwest sea of Japan is the late tectonic compression in the direction of NEE-SWW, while in the northwest sea of Japan, the tectonic type is early and the late tectonic compression is lacking, so, It is inferred that the gas source of hydrates should be mainly biogenic, but the possibility of thermal origin is very small.
【作者单位】：国土资源部天然气水合物重点实验室;中国地质调查局青岛海洋地质研究所;中国地质调查局水文地质环境地质调查中心;长江大学资源与环境学院;
【基金】：国家青年科学基金“南海北部神狐海域深水水道演化与水合物成藏的关系”(41406080) 国家自然科学基金“祁连山冻土区天然气水合物气源成因研究”(41273066)
【分类号】：P618.13;P744.4

【相似文献】