The role of clinopyroxene in amphibole fractionation of arc magmas: Evidence from mafic intrusive rocks within the Gangdese arc, southern Tibet
文献类型：期刊论文
| 作者 | Wang, Jun1,2; Wang, Qiang1,2,3; Dan, Wei1,3; Yang, Jin-Hui4; Yang, Zong-Yong1; Sun, Peng1; Qi, Yue1; Hu, Wan-Long1 |
| 刊名 | LITHOS
 |
| 出版日期 | 2019-08-01 |
| 卷号 | 338页码:174-188 |
| 关键词 | Gangdese arc Amphibole Magma differentiation Continental crust Tibet |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2019.04.013 |
| 英文摘要 | Amphibole is thought to be a key control on the differentiation of arc magmas but the fractionation of this mineral remains enigmatic because it is rarely present in erupted lavas. This study presents detailed petrological, mineralogical, and geochronological data for newly identified Late Triassic (217-215 Ma) mafic intrusive rocks from the Gangdese arc of southern Tibet. These gabbros host an amphibole-rich cumulate enclave and clinopyroxene crystal clots, including two mineral assemblages in chemical disequilibrium: (1) amphibole and Type-1 clinopyroxene within the enclave and clots; and (2) small crystals of Type-2 clinopyroxene, plagiodase, and biotite within the host. Textural and geochemical evidence indicate that the enclave and clots represent captured fragments of amphibole- and clinopyroxene-dominated lower crustal crystal mushes, respectively, whereas small host crystals formed by the shallow crystallization of evolved melts extracted from these crystal mushes. The compositional variations between the two types of clinopyroxene also reveal this melt segregation process. Amphibole with similar rare earth element patterns to associated Type-1 clinopyroxene inclusions suggest that the former formed through peritectic reactions consuming clinopyroxene. Enhanced amphibole fractionation may also have occurred as a result of the presence of high-density clinopyroxene inclusions. This indicates that the fractionation of amphibole together with precursory clinopyroxene inclusions within the deep crust controls the early chemical evolution of mafic arc magmas, a process that is consistent with the geochemical variations in lavas from three other active arc volcanoes. The associated cumulates can efficiently delaminate back into the mantle, ultimately leading to the generation of SiO2-rich continental crustal material. (C) 2019 Elsevier B.V. All rights reserved. |
| WOS关键词 | CALC-ALKALINE DIFFERENTIATION ; LHASA TERRANE IMPLICATIONS ; ZIRCON U-PB ; VOLCANIC-ROCKS ; TRACE-ELEMENT ; HF ISOTOPES ; EARLY SUBDUCTION ; CRUSTAL GROWTH ; ST-VINCENT ; CONSTRAINTS |
| 资助项目 | National Key R&D Program of China[2016YFC0600407] ; National Natural Science Foundation of China[91855215] ; National Natural Science Foundation of China[41630208] ; National Natural Science Foundation of China[41573027] ; Key Program of the Chinese Academy of Sciences[QYZDJ-SSW-DQC026] ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences[XDA2007030402] ; Talent Project of Guangdong Province[2014TX01Z079] ; Key Science Program of Guangzhou City[201707020032] ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 Project)[135TP201601] |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000471738200012 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Talent Project of Guangdong Province ; Talent Project of Guangdong Province ; Key Science Program of Guangzhou City ; Key Science Program of Guangzhou City ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 Project) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 Project) ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Talent Project of Guangdong Province ; Talent Project of Guangdong Province ; Key Science Program of Guangzhou City ; Key Science Program of Guangzhou City ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 Project) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 Project) ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Talent Project of Guangdong Province ; Talent Project of Guangdong Province ; Key Science Program of Guangzhou City ; Key Science Program of Guangzhou City ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 Project) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 Project) ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Key Program of the Chinese Academy of Sciences ; Key Program of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Strategic Priority Research Program (A) of the Chinese Academy of Sciences ; Talent Project of Guangdong Province ; Talent Project of Guangdong Province ; Key Science Program of Guangzhou City ; Key Science Program of Guangzhou City ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 Project) ; Guangzhou Institute of Geochemistry, Chinese Academy of Sciences (GIGCAS 135 Project) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/92532]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Wang, Qiang; Dan, Wei |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Jun,Wang, Qiang,Dan, Wei,et al. The role of clinopyroxene in amphibole fractionation of arc magmas: Evidence from mafic intrusive rocks within the Gangdese arc, southern Tibet[J]. LITHOS,2019,338:174-188. |
| APA | Wang, Jun.,Wang, Qiang.,Dan, Wei.,Yang, Jin-Hui.,Yang, Zong-Yong.,...&Hu, Wan-Long.(2019).The role of clinopyroxene in amphibole fractionation of arc magmas: Evidence from mafic intrusive rocks within the Gangdese arc, southern Tibet.LITHOS,338,174-188. |
| MLA | Wang, Jun,et al."The role of clinopyroxene in amphibole fractionation of arc magmas: Evidence from mafic intrusive rocks within the Gangdese arc, southern Tibet".LITHOS 338(2019):174-188. |
入库方式： OAI收割
来源：地质与地球物理研究所
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