摘要
沿西昆仑山大红柳滩断裂有三处新生代溶岩被,其岩性主要为中—基性喷出岩,形成时代分别为上新世及晚更新世.火山机体呈串珠状沿断裂展布,属陆相中心式喷发类型.各处的喷发次数、喷发强度、喷发性质、岩石化学特征既有共同的特点,也有明显的差异.这些特征与康西瓦深断裂东段的乌鲁克库勒地区及东昆仑南缘深断裂的黑石湖、鲸鱼湖地区的新生代火山活动特征完全可以对比.新生代以来,由于印度板块与欧亚板块强烈碰撞,使青藏高原急剧抬升,高原内部构造进一步复杂化,同时,使大红柳滩断裂产生了近50km的水平位移,形成当今的状况.
There are three lava sheets of Cenozoic Era along the Dahongliutan fault zone of Western Korum Mountains. They consist mainly of neutral-basic effusive rocks.
The formation of the rocks are Early Miocene to Late Pliocene and Late Pleistocene. The volcanic massifs distributed along the Dahongliutan fault are a string of beads in shape.They belong to the eruption of central type.The volcanic eruptive frequency, intensity and character in different places and the petro-chemical feature and the volcanic activity age have both similarities and varieties.These features are comparable with the volcanic active features of Cenozoic Era of the Ulugkl area from the eastern section of the Kengxiwa deep fault and the Black Stone lake, the Whale lake areas of the southern deep fault zone of Eastern Kunlun mountains. Therefore, the Kengxiwa deep fault can be linked up to the southern deep fault of
Eastern Kunlun Mountains before Cenozoic Era. Since Cenozoic Era, Qingzang pla-teau has been rap dly lifted because of the intense collision of Indian plate with Eurasian plate so that the structure in the plateau is further complicated. The Dahongliutan fault was displaced about 50 km in horizontal direction by the Ru-oqiang-Lazhulong deep fault hence, its present framework was formed.
出处
《新疆地质》
CAS
CSCD
1989年第2期86-91,共6页
Xinjiang Geology
关键词
西昆仑山大红柳滩断裂
新生代熔岩波
中—基性喷出岩
陆相中心式喷发
Dahongliutan fault zone of western Kunlun mountains, lava sheets of Cenozoic Era, neutral-basic effusive rocks, eruption of central type of land facies
