从地震信息看红河—金沙江断裂带构造特征  

Seismic Surveying Information Demonstrates Tectonic Feature of the Red River-Jinshajiang Fault Zone

作　　者：吴红华 戴福贵 杨津 杨克绳 

机构地区：[1]东方地球物理公司物探技术研究中心 [2]东方地球物理公司研究院 [3]东方地球物理公司研究院地质研究中心

出　　处：《海相油气地质》2010年第1期35-43,共9页Marine Origin Petroleum Geology

摘　　要：红河—金沙江断裂带,根据地质结构的差异可分为北段羌塘向北叠瓦逆冲断裂带,中段三江—哀牢山向东叠瓦逆冲断裂带,南段河内—中建正反转走滑断裂带。北段和中段均由三组基本平行的叠瓦逆冲断层构成,显示以强烈挤压为特征,但后者相对较弱;南段则经历了古近纪由挤压反转为拉张,形成一些断陷构造,新近纪又反转为挤压,断陷转变为坳陷,形成河内、莺歌海及中建等坳陷。该南段的主断层为正反转构造逆冲带的前锋太平断裂带,与原先人们所认为的不相同。红河—金沙江断裂带的挤压特征总体上由北往南逐渐减弱,其演化受特提斯构造活动所控制。断裂带的油气勘探成果表明,在喜马拉雅期形成的断坳结构盆地中油气显示较好。The Red River-Jinshajiang Fault Zone, based on the difference of geologic texture, can be divided into three subzones, including the northern （the Qiantang imbricated-northward fault subzone）, the middle （the Hanoi- Zhongjiang normally reversed stdke-slip fault subzone） and the southem （the Sanjiang-Ailaoshan imbricated-east- ward fault subzone）. The northern and the middle subzones consist respectively of three groups of approximately parallel imbricated faults,which reveals intensively compression. The southern subzone had yielded some faulted depressions that brought from conversing compression into extension dudng Paleogene and then they conversed into depressions, such as Hanoi, Yingge Sea, Zhongjian and other depressions as a result of reversion into compression during Neogene. The compression of Red River-Jinshajiang Fault Zone exhibits to get weakening gener- ally from south to north under the control of Tethyan tectonic activity. The petroleum exploration in the fault zone have indicated that good oil and gas potential is present in those faulted depressions that formed dudng Himalayan period.

关 键 词：红河-金沙江断裂带 构造特征 反转构造 构造演化 特提斯 

分 类 号：TE111.2[石油与天然气工程—油气勘探]