青藏高原羌塘中部冈玛日—菊花山地区大型逆冲推覆构造的基本特征及形成机制  

Gangmari-Juhuashan thrust nappe were discovered in central Qiangtang,northern Tibet,China.

作　　者：解超明[1] 李才[1] 董永胜[1] 吴彦旺[1] 王明[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

出　　处：《地质通报》2010年第12期1857-1862,共6页Geological Bulletin of China

基　　金：国家自然科学基金项目(编号:40872146;41072166);中国地质调查局项目(编号:1212010818015;基[2010]矿评02-03-07)资助

摘　　要：青藏高原羌塘中部冈玛日地区发现冈玛日-菊花山大型新生代逆冲推覆构造,延伸长度超过200km,总体走向近东西,构成新生代戈木错盆地的北部主干边界。推覆构造在冈玛日一带出露最好,表现为一系列单冲型逆冲断层构成的叠瓦状构造,逆冲断面倾向北,倾角12～20°,逆冲方向190～200°。冈玛日-菊花山逆冲推覆构造的发现,对探讨高原隆升在羌塘地区的表现形式具有重要的科学意义,为探讨新生代戈木错盆地的演化和盆地油气资源远景评价提供了新的构造依据。Recently,large Cenozoic Gangmari-Juhuashan thrust structure were discovered at the Gangmari area in central Qiangtang,Qinghai-Tibet Plateau,extending more then 200km in length,whose general strike is nearly EW.It constitutes main boundary of the northern Cenozoic Gemucuo basin.The best outcrop is at gangmari,showing imbricate structure formed by a series of single-impulse-type thrust fault.The dip of inverse transversals is N and inclination is 12~20°.The thrust direction is 190~200°.The discovery of the Gangmari-Juhuashan thrust structure provides significant new structure data for the evolution of the Cenozoic Gemucuo basin and petroleum resources assessment of the basin,which is great significance to research the manifestation of plateau uplift in Qiangtang.

关 键 词：青藏高原 羌塘中部 新生代盆地 冈玛日 逆冲推覆 

分 类 号：P542.2[天文地球—构造地质学] P542.3[天文地球—地质学]