库鲁克塔格西段孔兹岩系的发现及年代学研究  

Discovery and Geochronology of Khondalite Series in Western Kuluketage,NW China

作　　者：王明阳[1] 尼加提.阿布都逊 郭瑞清[1] 周刚[1,2] 朱志新[1,3] 

机构地区：[1]新疆大学地质与矿业工程学院,新疆乌鲁木齐830046 [2]新疆地质矿产勘查开发局,新疆乌鲁木齐830000 [3]新疆维吾尔自治区地质调查院,新疆乌鲁木齐830000

出　　处：《新疆地质》2016年第1期17-24,共8页Xinjiang Geology

基　　金：中国地质调查局新疆兴地塔格阿訇口地区1:5万(K45E014010;K45E014011;K45E015010;K45E015011;K45E016011)等5幅区调(1212011120477)联合资助

摘　　要：库鲁克塔格西段出露含石墨、富铝矿物（矽线石、红柱石、堇青石）和石榴石为特征的高级变质岩石组合。对其岩石学特征及年代学研究,有助于了解塔里木克拉通变质基底性质。岩石学和岩石地球化学特征表明,该套岩石组合为典型的孔兹岩系,与华北克拉通及邻区具亲缘性。锆石U-Pb年代学研究表明,孔兹岩系存在1 928~2 636Ma物源区年龄信息,记录了~1.92 Ga和~1.85 Ga两期变质事件,为塔里木克拉通前寒武纪早期地质演化、Columbia超大陆恢复与重建提供了新证据。High grade metamorphic rocks assemblage characterized by graphite,Al-rich minerals,such as sillimanite, andalusite and cordierite） exposed in western Kuluketage area,petrology and geochronology of which will help to learn more about the basement characteristics of Tarim Craton.Petrological and Geochemical characteristics indicate that the rocks assemblage above belong to typical khondalite series and has consanguinity with North China Craton and adjacent regions. Zircon U-Pb geochronology suggests that studied khondalite series represent 1 928~2 636 Ma age information for provenance as a record of two metamorphic events at ~1.92 Ga and 1.85 Ga.The research results above provide a new evidence for early Precambrian tectonic evolution of Tarim Craton and rehabilitation or reconstruction of Columbia Supercontinent.

关 键 词：孔兹岩系 库鲁克塔格 塔里木克拉通 锆石U-PB定年 Columbia超大陆 

分 类 号：P597.3[天文地球—地球化学] P597.3[天文地球—地质学]