东昆仑水仙南地区基性—超基性杂岩体岩石地球化学特征及其形成环境探讨  

Geochemical Characteristics and Formation Environment of Ultrabasic-Basic Complex in the Shuixiannan,East Kunlun

作　　者：吴树宽 张金玲 张元 顾红彬 王有斌 马吉雄 WU Shukuan;ZHANG Jinling;ZHANG Yuan;GU Hongbin;WANG Youbin;MA Jixiong(The Fifth Geological and Mineral Survey Institute of Qinghai Province, Xining, Qinghai 810000, China)

机构地区：[1]青海省第五地质矿产勘查院,青海西宁810000

出　　处：《中国锰业》2018年第6期37-42,共6页China Manganese Industry

摘　　要：水仙基性—超基性杂岩体位于东昆仑造山带西段,呈长条状侵位于金水口群变质岩系中,由辉石岩、角闪辉长岩、辉长岩组成,杂岩体主量元素、微量元素特征显示:杂岩体属亚碱性系列,在岩浆演化过程中具有一定程度的分离结晶作用,源区具有岩石圈幔源特征,形成构造环境为岛弧环境。There exists in Shuixiannan ultrabasic-basic complex that is outcropped in the western part of East Kunlun orogeny.It intrudes metamorphic series of Jinshuikou Group with a long strip shape,including the complex consists of pyroxenite,amphibole gabbro and gabbro.The geochemical characteristics indicate that the complex belongs to the subalkaline series,the magma evolution process of the complex experienced in a certain degree of fractional crystallization.The magma source has the lithospheric mantle features,and the generation of the complex was an island-arc setting.

关 键 词：基性—超基性杂岩体 分离结晶 岩浆源区 岛弧环境 

分 类 号：P595[天文地球—地球化学]