台湾海峡地区地质构造特征
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摘要
台湾海峡地区属欧亚大陆边缘新生代断陷区,莫霍面埋深27～30km,具减薄陆壳性质,区域构造走向呈北东向,反射地震剖面上可划分出T_0、T_1、T_2、T_7、T_8、T_9、T_g和T_(g1)八个反射界面,分别代表N_2、N_1~3、N_1~2、E_2~2、E_2~1、E_1、K和AnK顶界。据对区域地震剖面的追踪对比,台湾海峡内由一系列左行雁列的隆起与坳(凹)陷组成,坳(凹)陷多为在上古生界-中生界基底上发育起来的东断西超的箕状断陷,其形成断裂发育和岩浆活动时间均自西北往东南依次变新,反映了新生代期间欧亚大陆东南边缘增生的过程。因此,区内各坳陷的生油岩时代、油气成熟时期和勘探目的层是不一致的,需区别对待。
Taiwan Strait region is part of the Cenozoic fault-depression along the Eurasia margin, its Moho depth is around 27-30km showing the feature of thinning continental crust, the regional tectonic trend appears as north by east orientation. Eight reflectors, i. e, T_0, T_1, T_2, T_7, T_8, T_9, T_g and T_(g1), representa- tive of N_2, N_1~3, N_1~2, E_2~2, E_2~1, E_1, K and AnK respectively, can be divided on the reflectional seismic section. In accordance with tracing and correlation of the regional seismic sections. Taiwan Strait is geotectonically composed of a spectrum of left-handed and en echelon uplifts and depressions, these depressions are al- most half-graben fault-depressions with a fault on the east side and onlap to the west side. Their forma- tion time, volcanic activities and fault-forming stages all have evolved from north west to southeast, which indicates the accretion process of southeastern Eurasia margin during the Cenozoic. Therefore, the times of source rocks and oil and gas maturation as well as the exploration target strata are not consistent in the region, which must be dealed with in differen ways.
Taiwan Strait region is part of the Cenozoic fault-depression along the Eurasia margin, its Moho depth is around 27-30km showing the feature of thinning continental crust, the regional tectonic trend appears as north by east orientation. Eight reflectors, i. e, T_0, T_1, T_2, T_7, T_8, T_9, T_g and T_(g1), representa- tive of N_2, N_1~3, N_1~2, E_2~2, E_2~1, E_1, K and AnK respectively, can be divided on the reflectional seismic section. In accordance with tracing and correlation of the regional seismic sections. Taiwan Strait is geotectonically composed of a spectrum of left-handed and en echelon uplifts and depressions, these depressions are al- most half-graben fault-depressions with a fault on the east side and onlap to the west side. Their forma- tion time, volcanic activities and fault-forming stages all have evolved from north west to southeast, which indicates the accretion process of southeastern Eurasia margin during the Cenozoic. Therefore, the times of source rocks and oil and gas maturation as well as the exploration target strata are not consistent in the region, which must be dealed with in differen ways.
引文
① 周祖翼.福建晚古生代-中生代大陆边缘构造演化.博士学位论文(同济大学),1989。
1 中国科学院南海海洋研究所、福建海洋研究所.台湾海峡西部石油地质地球物理调查研究.海洋出版社,1989
2 福建省地矿局.福建省区域地质志.地质出版社,1985
3 金庆焕.南海地质与油气资源.地质出版社,1989
4 何春荪.台湾地质概论.(台)地质调查所,1986
5 支家生.东海陆架盆地的构造演化与油气分布.中国海上油气(地质),1990,4(5)
6 王执明.太鲁阁峡谷之变质岩.(台)太鲁阁国家公园管理处,1991
7 肖宝宗等.澎湖盆地油气潜能评估.台湾石油地质,1991,26:215～259
8 张之孟.论中亚中生代大陆边缘和中国东海的构造背景.海洋地质译丛,1992(1)
9 Faure M.菲律宾西部前始新世的同变质构造及其为东南亚演化史提供的信息.台湾石油地质,1989,2:116～126
1 中国科学院南海海洋研究所、福建海洋研究所.台湾海峡西部石油地质地球物理调查研究.海洋出版社,1989
2 福建省地矿局.福建省区域地质志.地质出版社,1985
3 金庆焕.南海地质与油气资源.地质出版社,1989
4 何春荪.台湾地质概论.(台)地质调查所,1986
5 支家生.东海陆架盆地的构造演化与油气分布.中国海上油气(地质),1990,4(5)
6 王执明.太鲁阁峡谷之变质岩.(台)太鲁阁国家公园管理处,1991
7 肖宝宗等.澎湖盆地油气潜能评估.台湾石油地质,1991,26:215～259
8 张之孟.论中亚中生代大陆边缘和中国东海的构造背景.海洋地质译丛,1992(1)
9 Faure M.菲律宾西部前始新世的同变质构造及其为东南亚演化史提供的信息.台湾石油地质,1989,2:116～126
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