沉积与特提斯地质Issue(2)：88-96,9.
西昆仑库地蛇绿岩的成因及构造意义
Genesis and tectonic significance of the Kuda ophiolites in western Kunlun Mountains,Xinjiang
摘要
Abstract
The Kuda ophiolites hosted on the northern side of the Kangxiwar strike-slip fault in western Kunlun Mountains,Xinjiang are made up of dismembered metamorphic peridotites,cumulate rocks and massive pillow basalts,and overlain by the variegated pyroclastic rocks and clastic rocks with turbidites. The Sinian to Early Ordovician is interpreted as the major periods for the formation of the oceanic basin for the Kuda ophiolites,and the emplacement of the ophiolites may represent the important records for the plate motion in the study area during the Late Proterozoic to the Early Palaeozoic. The chemical characteristics show that the Kuda peridotites occur in the abyssal mantle peridotite fields,and have lower CaO,Al2 O3 and FeOT contents than those in the primitive mantle. The mineralogical characteristics of the peridotites and geochemical signatures of the basalts indicate that the Kuda ophiolites have seen about 30℅ of partial melting of the peridotites,and recorded the tectonic transition from the mid-oceanic ridge to the subduction zone,similar to those of the Yarlung Zangbo suture zone.关键词
铬尖晶石/洋中脊/俯冲带/库地蛇绿岩Key words
picotite/mid-oceanic ridge/subduction zone/Kuda ophiolite分类
天文与地球科学引用本文复制引用
杨军,蔡柯柯,赵志强,王世伟,甘海涛..西昆仑库地蛇绿岩的成因及构造意义[J].沉积与特提斯地质,2015,(2):88-96,9.基金项目
新疆西昆仑地区1:5万I44E005003、I44E005004、I44E006003、I44E006004、I44E007003等5幅区调（项目编号1212011220646）、新疆和田县化石山一带铅锌矿预查（项目编号K13-3-XJ10）资助 （）
