新疆西天山伊犁地块晚古生代火山岩地质特征及构造意义  

Volcanic Rock Geological Characteristics and Tectonic Significance of the Late Paleozoic Yili Block in the Western Tianshan,Xinjiang

作　　者：朱志新[1,2] 董连慧[3] 刘淑聪[4] 李锦轶[5] 王克卓 赵同阳 李平[1] 靳留圆[1] 

机构地区：[1]新疆大学,新疆乌鲁木齐830000 [2]新疆维吾尔自治区地质调查院,新疆乌鲁木齐830011 [3]新疆维吾尔自治区地质矿产勘查开发局,新疆乌鲁木齐830011 [4]防灾科技学院,河北三河065201 [5]中国地质科学院地质研究所,北京100037

出　　处：《新疆地质》2012年第3期258-263,共6页Xinjiang Geology

基　　金：中央高校基本科研业务费专项资金创新项目团队资助计划项目(ZY20120101);"十二五"国家科技支撑计划重点项目(2011BAB06B04-2);中国博士后科学基金特别资助项目(200902617)共同资助

摘　　要：对新疆西天山伊犁盆地晚古生代火山岩时空分布和地质特征、岩石化学等进行系统总结,认为该盆地晚古生代火山岩主要由晚泥盆世至早二叠世的火山岩组成,其形成与南北天山洋盆演化有关。晚泥盆—早石炭世大哈拉军山组火山岩为天山南北洋盆大洋板块俯冲而成的钙碱性火山岩,晚石炭世伊什基里克组火山岩为挤压环境向拉张环境过渡的钙碱性火山岩和碱性火山岩,早二叠世乌郎组火山岩为后造山具裂谷特征的双峰式火山岩组合。This Paper were systematically summary that the Late Paleozoic volcanic spatiotemporal distribution and geological characteristics,rocks chemistry characteristics of Yili basin in the West Tianshan,the Late Paleozoic volcanic basin mainly by Late Devonian to Early Permian volcanic composition,its formation with South Tianshan oceanic evolution relevant,Late Devonian-Early Carboniferous Dahalajunshan formation volcanic as Tianshan South ocean basin subduction formed calcium alkaline volcanic,Late Carboniferous Yishijilike formation volcanic rocks is composed under extrusion environment transite to extensional environmental,and was composed by calcium alkaline volcanic and alkaline volcanic. Early Permian Wulang formation volcanic compared postorogenic with rift characteristics bimodal volcanic combination.

关 键 词：新疆 伊犁盆地 晚古生代 火山岩 地质特征 

分 类 号：P588.14[天文地球—岩石学]