西藏改则东地区第四纪泥火山的首次发现  

Fisrt Discovery of Mud Volcanoes in the East of Gaize,Tibet

作　　者：和源[1] 朱利东[1] 杨文光[1] 陈庆[1] 陶刚[1] 解龙[1] 

机构地区：[1]成都理工大学沉积地质研究院,成都610059

出　　处：《地质科技情报》2016年第4期38-42,73,共6页Geological Science and Technology Information

基　　金：中国地质调查局项目(1212011086065;12120113033034)

摘　　要：青藏高原作为印度板块和欧亚板块碰撞造山的产物,新生代以来构造活动强烈,构造样式和类型复杂,新构造运动成为了研究的热点问题。而南羌塘地区河流、湖泊及其构造阶地、泥火山广泛发育,对研究羌塘地区的新构造和青藏高原隆升问题来说都是得天独厚的优越条件。依托中国地质调查局《改则东四幅1∶5万区域地质调查》项目,在青藏高原羌塘盆地南部改则东益杰错地区首次发现了泥火山,对益杰错地区泥火山的规模、构成以及发育部位进行了调查,并结合高精度遥感影像的分析结果,阐述了泥火山的发育特征,确定了益杰错泥火山是由于地下富含有机质的沉积物受到地壳运动的影响,随高压的气体和水喷出地表所形成,并指出益杰错泥火山的发育指示了新生代以来康托-日俄东断裂依旧活动。Qinghai-Tibet Plateau as the product of collision orogenics between the Indian plate and Eurasian plate, indicates violent tectonic activities, complicated tectonic styles and types since Cenozoic era and its tectonic activities has become a hot issue recently. The rivers,lakes, tectonic terraces and mud volcanoes are widely developed in the south of Qiangtang Basin which are the unique advantages for researching new tectonic and uplifting activities in Qinghai-Tibet Plateau. Relying on the Bureau of Geological Survey of China （（1 ＂ 5 million regional geological survey of four,east of Gaize ））project, we found mud volcanoes in Yijiecuo area of the east Gaize , which are located in the south of Qiangtang Basin in Qinghai-Tibet Plat- eau. These mud volcanoes are first discovered in China and are studied on their scale, structure and devel- opment position in Yijiecuo area. Based on the high-precision remote sensing image and the development characteristics of mud volcanoes, this study has determined that Yijiecuo mud volcanoes are formed be- cause the underground organic-rich sediments were so affected by crustal movement that the gas and water in high pressure were ejected to the surface. The study also suggests that the development of Yijiecuo mud volcanoes indicates that Kangtuo-Rie Fault is still active from Cenozoic era.

关 键 词：青藏高原 改则 泥火山 新构造运动 

分 类 号：P317.2[天文地球—固体地球物理学]