藏北羌塘中部首次发现泥火山  

First discovery of mud volcanoes in central Qiangtang, northern Tibet, China

作　　者：解超明[1] 李才[1] 李林庆 吴彦旺[1] 胡培远[1] 

机构地区：[1]吉林大学地球科学学院,吉林长春130061 [2]河北省区域地质调查研究所,河北廊坊065000

出　　处：《地质通报》2009年第9期1319-1324,共6页Geological Bulletin of China

基　　金：中国石油化工股份有限公司项目(编号:Ph08005);中国地质调查局项目(编号:1212010818115)资助

摘　　要：青藏高原羌塘中部戈木错新生代盆地首次发现大量泥火山,少数泥火山喷发物中有含沥青脉的岩石。区内泥火山群出露在第四纪沉积物之上,明显受新构造断裂活动的控制。喷发物中含沥青脉岩石泥火山的发现说明羌塘中部曾经发生过大规模的油气运聚活动,沥青脉赋存在古近纪唢呐湖组湖相灰岩的层间裂隙中,为层间缝型沥青脉。泥火山喷出物中含沥青脉岩石的发现说明羌塘新生代沉积盆地具有良好的油气前景。During this time, a large number of mud volcanoes were firstly discovered in central Qiangtang,Qinghai-Tibet Plateau,and some of the eruptive material contain rocks wrth asphalt veins.In the area,mud volcano groups outcrop above the Quaternary sediments,and they were significantly controlled by new tectonic faulting movement.The discovery of mud volcanoes where there are eruptive materials containing asphalt veins indicate that there had been large-scale hydrocarbon migration and accumulation in central Qiangtang,asphalt veins should be embodied between those interlayer fissures of lacustrine limestone of the Paleogene Suonahu group, and the asphalt vein belongs to interlayer type.All theses findings show that Cenozoic sedimentary basin in Qiangtang has a very good petroleum prospect.

关 键 词：青藏高原 羌塘中部 新生代盆地 泥火山 沥青脉 

分 类 号：P317.2[天文地球—固体地球物理学]