地质通报2017，Vol.36Issue(2)：251-257,7.
东昆仑南坡俯冲增生杂岩楔中纳赤台群物质组成特征
Material composition characteristics of Naijtal Group in subduction accretion complex on the southern slope of East Kunlun Mountains
摘要
Abstract
The formation of the East Kunlun Mountains experienced long-term tectonic evolution, collage, collision and the complex orogenic process, thus generating very complex geological structure. During its northward subduction, Ordovician-Silurian Kunduz formed typical subduction accretion complex on the southern slope of East Kunlun Mountains. In addition, the extremely complicated composition of the Naijtal Group is also the vital component in this belt. Through field investigation, the authors found that the Naijtal Group has very complicated composition, and consists of ophiolite fragments-bearing deposits, ocean mud calcium deposits, mid-ocean ridge-ocean island deposits that contain ophiolite fragments and ocean pelitic calcareous sediments, abyssal-bathyal sediments with the characteristics of turbidite on the continental slope, foreland basin flysch sediments and volcanic island arc material composi-tion. The contact relationships between different rock combinations are ductile shear contact after faulting, and these rocks with strong tectonic deformation have very different ages and tectonic environments. In the process of long-term subduction, different materials collaged or heaped together at the edge of the east Kunlun block in the forms of rocks with different sizes and shapes.关键词
东昆仑南坡俯冲增生杂岩/奥陶纪—志留纪/纳赤台群物质组成/形成时代/构造环境Key words
subduction accretion complex on the southern slope of East Kunlun Mountains/Ordovician-Silurian period/Naijtal Group composition/formation age/tectonic environment分类
天文与地球科学引用本文复制引用
史连昌,才航加,许海全,徐博,魏有宁,赵明福..东昆仑南坡俯冲增生杂岩楔中纳赤台群物质组成特征[J].地质通报,2017,36(2):251-257,7.基金项目
中国地质调查局项目《青海1:25万布伦台、大灶火幅区调修测》(编号:1212011121187) （编号:1212011121187）
