南海笔架南盆地沉积和构造研究  

A STUDY ON SEDIMENTATION AND TECTONICS IN BIJIA'NAN BASIN, SOUTH CHINA SEA

作　　者：高红芳[1] 白志琳[1] 

机构地区：[1]广州海洋地质调查局，广州510760

出　　处：《中国海上油气（地质）》2002年第4期245-249,共5页China Offshore Oil and Gas(Geology)

摘　　要：通过二维地震剖面综合解释和精细速度分析,研究了笔架南盆地的沉积和构造特征,认为盆地西部沉积环境稳定,为与大洋相似的深海-半深海环境;东部受构造活动影响大,以浊流沉积和深海沉积为主.盆地沉积厚度总体上呈西薄东厚.盆地的构造特征东西部明显不同,西部为深海平原,发育少量正断层,地层无变形;向东部逐渐过渡为海沟坳陷带和逆冲增生带,正断层、逆冲断层发育,地层变形较强.在此基础上,结合区域构造背景,探讨了盆地构造演化史.Sedimentary and tectonic features are studied in Bijia'nan basin, South China Sea, by integrated 2D seismic interpretation and refined velocity analysis. The western basin is considered as a stable bathyal_abyssal environment similar to ocean, and the eastern basin is deeply affected by tectonic activities where the sedimentary process is characterized mainly by turbidity and abyssal facies. The whole sedimentary section within the basin is a wedge thickening from west to east, and the tectonic characteristics are obviously different in the basin. The western part is an abyssal plain with undeformed sediments and a few normal faults, which has gradually eastwards transformed into a trench_sagging zone and a thrusting_accretionary zone with well_developed normal faults and thrust faults and high_deformed sediments. On this basis and in combination with the regional tectonic setting, the tectonic evolution history of the basin has been discussed.

关 键 词：南海笔架南盆地 沉积 构造 研究 深海平原 海沟坳陷带 逆冲增生带 构造演化史 

分 类 号：P941.75[天文地球—自然地理学]