中天山巴仑台地区花岗质岩石的Hf同位素研究:对构造演化及大陆生长的约束

被引:27
作者
黄河 [1 ]
王涛 [1 ,2 ]
秦切 [3 ,1 ]
侯继尧 [3 ,1 ]
童英 [1 ]
郭磊 [1 ]
张磊 [1 ]
王静 [3 ]
梁昭元 [3 ]
机构
[1] 中国地质科学院地质研究所
[2] 中国地质调查局西安地质调查中心
[3] 中国地质大学
关键词
中天山; 巴伦台; 花岗质岩石; 大陆生长; 锆石Hf同位素;
D O I
暂无
中图分类号
P588.121 []; P597 [同位素地质学与地质年代学];
学科分类号
070902 [地球化学];
摘要
中国中天山地块位于天山造山带的核心部位,对研究中亚造山带西南段构造演化、块体起源和陆壳生长等科学问题具有重要意义。本次研究围绕中天山地块西段巴仑台一带出露的古生代花岗质岩石展开,报道了部分代表性岩体的LA-ICP-MS锆石U-Pb年龄和MC-ICP-MS锆石Lu-Hf同位素特征。同时还系统总结前人发表的研究区内花岗质岩石的锆石U-Pb年龄和Lu-Hf同位素资料。本次研究的7个花岗质侵入体的锆石LA-ICPMS年龄分别为435±5 Ma、432±4 Ma、359±4 Ma、312±4 Ma、346±2 Ma、306±5 Ma和362±5 Ma。它们在成因类型上均属于I型花岗岩,起源于深部不同性质地壳物质的部分熔融,部分岩体具有壳幔混合成因。研究表明,巴仑台一带的岩浆事件主要发生在早志留世—早泥盆世(435~408 Ma)、晚泥盆世—早石炭世(370~339 Ma)和晚石炭世—中二叠世(313~263 Ma)三个阶段,第一期岩浆事件是古天山洋闭合形成的后碰撞体制以及古南天山洋俯冲导致的大陆岛弧环境共同作用的结果。而古南天山洋俯冲活动的暂停和新一轮的洋盆扩张是导致区内中、晚泥盆世岩浆活动暂停的原因。第二期花岗质侵入体是古南天山洋第二期北向俯冲所导致的大陆岛弧岩浆作用的产物,而第三期花岗质侵入体形成于古南天山洋最终闭合之后的后碰撞环境中。通过总结区内古生代花岗质岩体的锆石的Hf同位素特征,我们认为巴伦台地区前寒武基底主要形成于三个阶段:1~2.47Ga至2.26Ga,为研究区对全球陆核生长事件的响应;2~1.47Ga至1.25Ga,对应于哥伦比亚超大陆的裂解;3~1.20Ga至0.90Ga,很可能是研究区对导致罗迪尼亚超大陆聚合的"Grenville运动"的响应。
引用
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页码:2286 / 2313
页数:28
相关论文
共 54 条
[1]
Tracking deep crust by zircon xenocrysts within igneous rocks from the northern Alxa; China: Constraints on the southern boundary of the Central Asian Orogenic Belt.[J].Jianjun Zhang;Tao Wang;Lei Zhang;Ying Tong;Zhaochong Zhang;Xingjun Shi;Lei Guo;He Huang;Qidi Yang;Wei Huang;Jianxin Zhao;Ke Ye;Jiyao Hou.Journal of Asian Earth Sciences.2015,
[2]
Record of assembly and breakup of Rodinia in the Southwestern Altaids: Evidence from Neoproterozoic magmatism in the Chinese Western Tianshan Orogen.[J].Jun Gao;Xin-Shui Wang;Reiner Klemd;Tuo Jiang;Qing Qian;Li-Xiu Mu;Yu-Zhou Ma.Journal of Asian Earth Sciences.2015,
[3]
Structural overprints of early Paleozoic arc-related intrusive rocks in the Chinese Central Tianshan: Implications for Paleozoic accretionary tectonics in SW Central Asian Orogenic Belts.[J].Linglin Zhong;Bo Wang;Liangshu Shu;Hongsheng Liu;Lixiu Mu;Yuzhou Ma;Yazhong Zhai.Journal of Asian Earth Sciences.2015,
[4]
Paleozoic ophiolitic mélanges from the South Tianshan Orogen; NW China: Geological; geochemical and geochronological implications for the geodynamic setting.[J].Tuo Jiang;Jun Gao;Reiner Klemd;Qing Qian;Xi Zhang;Xianming Xiong;Xinshui Wang;Zhou Tan;Bangxue Chen.Tectonophysics.2014,
[5]
Zircon U–Pb and Hf isotopic studies of the Xingxingxia Complex from Eastern Tianshan (NW China): Significance to the reconstruction and tectonics of the southern Central Asian Orogenic Belt.[J].Zhen-Yu He;Ze-Ming Zhang;Ke-Qing Zong;Hua Xiang;Xi-Jie Chen;Ming-Jun Xia.LITHOS.2014,
[6]
The Paleozoic evolution of Central Tianshan: Geochemical and geochronological evidence [J].
Ma, Xuxuan ;
Shu, Liangshu ;
Meert, Joseph G. ;
Li, Jinyi .
GONDWANA RESEARCH, 2014, 25 (02) :797-819
[7]
Neoproterozoic to Paleozoic long-lived accretionary orogeny in the northern Tarim Craton [J].
Ge, Rongfeng ;
Zhu, Wenbin ;
Wilde, Simon A. ;
He, Jingwen ;
Cui, Xiang ;
Wang, Xi ;
Zheng Bihai .
TECTONICS, 2014, 33 (03) :302-329
[8]
Early Permian slab breakoff in the Chinese Tianshan belt inferred from the post-collisional granitoids [J].
Ma, Xuxuan ;
Shu, Liangshu ;
Meert, Joseph G. .
GONDWANA RESEARCH, 2015, 27 (01) :228-243
[9]
Early Paleozoic Tectonic Evolution of the South Tianshan Collisional Belt: Evidence from Geochemistry and Zircon U-Pb Geochronology of the Tie'reke Monzonite Pluton, Northwest China [J].
Huang, He ;
Zhang, Zhaochong ;
Santosh, M. ;
Zhang, Dongyang ;
Zhao, Zhidan ;
Liu, Junlai .
JOURNAL OF GEOLOGY, 2013, 121 (04) :401-424
[10]
Reassessment of continental growth during the accretionary history of the Central Asian Orogenic Belt [J].
Kroener, A. ;
Kovach, V. ;
Belousova, E. ;
Hegner, E. ;
Armstrong, R. ;
Dolgopolova, A. ;
Seltmann, R. ;
Alexeiev, D. V. ;
Hoffmann, J. E. ;
Wong, J. ;
Sun, M. ;
Cai, K. ;
Wang, T. ;
Tong, Y. ;
Wilde, S. A. ;
Degtyarev, K. E. ;
Rytsk, E. .
GONDWANA RESEARCH, 2014, 25 (01) :103-125