Origin of the late early cretaceous granodiorite and associated dioritic dikes in the hongqilafu pluton, northwestern tibetan plateau: a case for crust-mantle interaction
文献类型：期刊论文
| 作者 | Li, Jiyong1,2,3; Niu, Yaoling1,2,4; Hu, Yan1,2,3; Chen, Shuo1,2,3; Zhang, Yu5; Duan, Meng6; Sun, Pu1,2,3 |
| 刊名 | Lithos
 |
| 出版日期 | 2016-09-01 |
| 卷号 | 260页码:300-314 |
| ISSN号 | 0024-4937 |
| 关键词 | Late early cretaceous Dioritic dikes Granodiorite Crust-mantle interaction Northwestern tibetan plateau |
| DOI | 10.1016/j.lithos.2016.05.028 |
| 通讯作者 | Li, jiyong(lijiy09@163.com) ; Niu, yaoling(yaoling.niu@foxmail.com) |
| 英文摘要 | We present a detailed study of geochronology, mineral chemistries, bulk-rock major and trace element abundances, and sr-nd-hf isotope compositions of the granodiorite and associated dioritic dikes in the hongqilafu pluton at the northwestern margin of the tibetan plateau. the granodiorite and dioritic dikes yielded zircon u-pb ages of similar to 104 ma and similar to 100 ma, respectively. the dioritic dikes comprise varying lithologies of gabbroic diorite, diorite porphyry and granodiorite porphyry, exhibiting a compositional spectrum from intermediate to felsic rocks. their mineral compositions display disequilibrium features such as large major element compositional variations of plagioclase, clinopyroxene and amphibole crystals. these dioritic dikes are enriched in incompatible elements (ba, rb, th, u, k) and sr-nd-hf isotopes (sr-87/(86)sri: 0.7066 to 0.7071, epsilon(nd)(t): 5.3 to 7.4, epsilon(hf)(t): -3.6 to -6.2). we suggest that the dioritic dikes were most likely derived from partial melting of mantle wedge metasomatized by the subducted/subducting seafloor with a sediment component, followed by afc processes with fractional crystallization of clinopyroxene, amphibole and plagioclase and assimilation of lower continental crust. the mantle-wedge derived magma parental to the dioritic dikes underplated and induced the lower continental crust to melt, forming the felsic crustal magma parental to the granodiorite with mantle melt signatures and having more enriched isotope compositions (sr-87/(86)sri: 0.7087 to 0.7125, epsilon(nd)(t): 9.5 to -11.6, epsilon(hf)(t): -10.3 to -14.1) than those of the dioritic dikes. the hongqilafu pluton is thus the product of mantle-crust interaction at an active continental margin subduction setting over the period of several million years. this understanding further indicates that the closure timing of the shyok back-arc basin and the collision between the kohistan-ladakh arc and the karakoram terrane may have taken place later than similar to 100 ma. (c) 2016 elsevier b.v. all rights reserved. |
| WOS关键词 | CONTINENTAL COLLISION ZONES ; WESTERN KUNLUN OROGEN ; THICKENED LOWER CRUST ; INDIA-ASIA COLLISION ; NORTH-CHINA-CRATON ; SHYOK-SUTURE ZONE ; MG ADAKITIC ROCKS ; SOUTHERN TIBET ; ISOTOPIC CONSTRAINTS ; ULTRAPOTASSIC ROCKS |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| WOS类目 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000381529800021 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2375454 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li, Jiyong; Niu, Yaoling |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, 7 Nanhai Rd, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England 5.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China 6.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Jiyong,Niu, Yaoling,Hu, Yan,et al. Origin of the late early cretaceous granodiorite and associated dioritic dikes in the hongqilafu pluton, northwestern tibetan plateau: a case for crust-mantle interaction[J]. Lithos,2016,260:300-314. |
| APA | Li, Jiyong.,Niu, Yaoling.,Hu, Yan.,Chen, Shuo.,Zhang, Yu.,...&Sun, Pu.(2016).Origin of the late early cretaceous granodiorite and associated dioritic dikes in the hongqilafu pluton, northwestern tibetan plateau: a case for crust-mantle interaction.Lithos,260,300-314. |
| MLA | Li, Jiyong,et al."Origin of the late early cretaceous granodiorite and associated dioritic dikes in the hongqilafu pluton, northwestern tibetan plateau: a case for crust-mantle interaction".Lithos 260(2016):300-314. |
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