新疆唐巴勒蛇绿岩地球化学特征及构造环境  

Geochemical Characteristics and Tectonic Environment of Ophiolite in Tangbale,Xinjiang

作　　者：秦彪[1] QIN Biao(Xinjiang General Team,China Building Materials Industrial Geological Survey Center,Urumqi 830000,Xinjiang,China)

机构地区：[1]中国建筑材料工业地质勘查中心新疆总队,新疆乌鲁木齐830000

出　　处：《贵州地质》2020年第2期189-198,共10页Guizhou Geology

基　　金：新疆托里县库尔塔勒一带1∶5万矿产地质调查项目,(项目编号A17-1-XJ03)资助。

摘　　要：对西准噶尔唐巴勒蛇绿混杂岩带进行了较系统的岩石学、地球化学方面的研究,认为其主体由变质橄榄岩、堆晶杂岩、岩墙群、基性熔岩和深海沉积岩组成。岩石地球化学数据表明其具轻稀土富集、重稀土相对亏损的缓右倾近似平坦分布模式特征,相对富集Hf、Sr、Zr等元素,亏损Tb、Ce、Sm等元素,Eu具弱负异常,岩石化学数据显示该蛇绿岩形成构造环境兼并岛弧(IAB)和洋中脊(MORB)特征。Petrology,geochemistry and chronology of the ophiolite melange belt in tangbal,western junggar were studied systematicly,and the main body was composed of ultramafic complex,pile crystal,mafic wall,basic lava and abyssal sediments.Rock geochemical data shows that the enrichment of light rare earth,heavy rare earth distribution patterns of relative losses slow right flat characteristics,relative concentration of Hf,Sr,Zr elements,such as loss of elements such as Tb,Ce,Sm,Nb negative anomaly,lithochemistry data shows that the ophiolite formation mergers island arc tectonic environment(IAB)and the mid-ocean ridge(MORB)characteristics.

关 键 词：唐巴勒 蛇绿岩 洋中脊 俯冲 

分 类 号：P588.125[天文地球—岩石学] P595[天文地球—地质学]