| 秦岭中段印支期花岗质岩浆作用与造山过程 |
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| 引用本文： | 刘树文,杨朋涛,李秋根,王宗起,张万益,王伟.秦岭中段印支期花岗质岩浆作用与造山过程[J].吉林大学学报(地球科学版),2011,41(6):1928-1943. |
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| 作者姓名： | 刘树文 杨朋涛 李秋根 王宗起 张万益 王伟 |
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| 作者单位： | 北京大学造山带与地壳演化教育部重点实验室,北京,100871;中国地质科学院矿产资源研究所,北京,100037 |
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| 基金项目： | “十二·五”国家科技支撑计划项目(2011BAB04B05),“十一·五”国家科技支撑计划项目(2006BAB01A11) |
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| 摘 要： | 据新测得的41个样品的秦岭中段花岗质岩石锆石U-Pb同位素年龄数据,结合近期发表的秦岭花岗岩年代学和岩石成因的研究资料,将秦岭中段印支期花岗质岩浆作用分为早期(248～216Ma)、中期(215～201Ma)和晚期(200～195Ma)3个阶段。早期阶段形成于勉略洋闭合过程,发育于洋壳向北俯冲到浅表地壳碰撞过程;中期阶段形成于扬子克拉通北缘与华北克拉通南缘北秦岭岛弧杂岩的同碰撞到造山带垮塌过程;晚期阶段形成于碰撞后造山带拆沉作用。因此,秦岭中段印支期花岗质岩浆作用较为完整地记录了造山带的演化过程。
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| 关 键 词： | 秦岭中段 印支期 花岗岩 造山带演化 |
Indosinian Granitoids and Orogenic Processes in the Middle Segment of the Qinling Orogen,China |
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| LIU Shu-wen,YANG Peng-tao,LI Qiu-gen,WANG Zong-qi,ZHANG Wan-yi,WANG Wei.Indosinian Granitoids and Orogenic Processes in the Middle Segment of the Qinling Orogen,China[J].Journal of Jilin Unviersity:Earth Science Edition,2011,41(6):1928-1943. |
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| Authors: | LIU Shu-wen YANG Peng-tao LI Qiu-gen WANG Zong-qi ZHANG Wan-yi WANG Wei |
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| Institution: | LIU Shu-wen1,YANG Peng-tao1,LI Qiu-gen1,WANG Zong-qi2,ZHANG Wan-yi1,WANG Wei1 1.Key Laboratory of Orogenic Belts and Crustal Evolution of Ministry of Education,Peking University,Beijing 100871,China 2.Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China |
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| Abstract: | Using recent research results and previously published data of chronology and petrogenesis,the authors have divided the Indosinian granitoid magmatism into three stages in the middle segment of the Qinling orogen.The early stage of the magmatism is attributed to the northward subduction of oceanic slab coupled with the closure of the Mianxian-Lueyang ocean during 248-216 Ma.The middle stage of the magmatism occurred in the period from the collision between the northern margin of the Yangtze Craton and the N... |
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| Keywords: | middle segment of the Qinling orogen Indosinian granite evolution of the orogen |
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