中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 岩石圈演化国家重点实验室
Early Paleozoic intracontinental granites in the Guangzhou region of South China: Partial melting of a metasediment-dominated crustal source

文献类型：期刊论文

作者Liu, Xiao4,5; Wang, Qiang3,4,5; Ma, Lin5; Yang, Jin-Hui2; Gou, Guo-Ning5; Ou, Quan1,5; Wang, Jun5
刊名LITHOS
出版日期2020-12-01
卷号376页码:14
关键词Biotite granite Two-mica granite Muscovite granite Baiyunshan and Maofengshan Intracontinental orogeny South China
ISSN号0024-4937
DOI10.1016/j.lithos.2020.105763
英文摘要Whether the formation of early Paleozoic granites in the South China Block was related to intracontinental orogenic processes or oceanic subduction continues to be debated. Here, we present whole-rock major element, trace element, and Sr-Nd isotopic data, as well as secondary ion mass spectrometry and laser ablationinductively coupled plasma-mass spectrometry zircon U-Pb geochronological and Hf-O isotopic data, frombiotite, two-mica, and muscovite granites in the Baiyunshan and Maofengshan areas of Guangzhou City, South China. Zircon U-Pb ages reveal that these rocks were formed during the early Paleozoic (446-438 Ma). These muscovite- and biotite-bearing granites have high SiO2 (69.0-80.4 wt%) and K2O (3.19-5.32 wt%) contents, and low MgO (0.46-1.17 wt%) contents. The granites are enriched in Rb, Th, U, and Pb, and depleted in Ba, Sr, Nb, and Ti. The Baiyunshan muscovite granites and Maofengshan biotite granites are slightly to moderately enriched in light rare-earth elements [LREEs; (La/Yb) CN = 2.27-15.1] with slight to pronounced negative Eu anomalies (Eu/Eu* = 0.27-0.72), whereas the Baiyunshan two-mica granites are significantly enriched in LREEs [(La/Yb)(CN) = 19.6-32.1] with moderate negative Eu anomalies (Eu/Eu* = 0.42-0.58). These muscoviteand biotite-bearing granites have enriched whole-rock Nd and zircon Hf isotopic compositions (epsilon(Nd)(t) = -12.1 to -7.6; epsilon Hf(t) = -11.4 to - 0.8), and high zircon delta O-18 values (8.5%-10.0%). We suggest that the Baiyunshan granites were formed by partialmelting of metasedimentary rocks, as they contain primary muscovite and have high zircon delta O-18 values. TheMaofengshan granites were formed by partialmelting of a hybridized crustal source containing metasedimentary rocks with subordinate amphibolites, as they have high zircon delta O-18 values, variable whole-rock SiO2 contents, and biotite compositions similar to those crystallized in I- and S-type magmas. These granites, along with the widespread early Paleozoic S-type granites in the Wuyi-Yunkai orogen, are distributed across a broad area rather than in a narrow belt. In addition, early Paleozoic S-type granites in the South China Block generally do not show younging trends from east to west or south to north. Moreover, the Baiyunshan-Maofengshan granites show geochemical characteristics similar to syn- or post-collisional granites and different fromvolcanic arc granites. Wetherefore propose that thesemuscovite- and biotite-bearing granites were formed in an intracontinental orogenic setting. (C) 2020 Published by Elsevier B.V.
WOS关键词ALKALI-CALCIC GRANITES ; WILSON CYCLE MODEL ; WUYI-YUNKAI OROGEN ; I-TYPE GRANITOIDS ; CATHAYSIA BLOCK ; DAMARA OROGEN ; PERALUMINOUS GRANITES ; SOUTHEASTERN CHINA ; MANTLE INTERACTION ; NANLING RANGE
资助项目Key Program of Guangzhou City[201707020032] ; National Key R&D Program of China[2016YFC0600407]
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000580897000028
出版者ELSEVIER
资助机构Key Program of Guangzhou City ; Key Program of Guangzhou City ; National Key R&D Program of China ; National Key R&D Program of China ; Key Program of Guangzhou City ; Key Program of Guangzhou City ; National Key R&D Program of China ; National Key R&D Program of China ; Key Program of Guangzhou City ; Key Program of Guangzhou City ; National Key R&D Program of China ; National Key R&D Program of China ; Key Program of Guangzhou City ; Key Program of Guangzhou City ; National Key R&D Program of China ; National Key R&D Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/98684]  
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; Ma, Lin
作者单位1.Chengdu Univ Technol, Inst Sedimentary Geol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Xiao,Wang, Qiang,Ma, Lin,et al. Early Paleozoic intracontinental granites in the Guangzhou region of South China: Partial melting of a metasediment-dominated crustal source[J]. LITHOS,2020,376:14.
APA Liu, Xiao.,Wang, Qiang.,Ma, Lin.,Yang, Jin-Hui.,Gou, Guo-Ning.,...&Wang, Jun.(2020).Early Paleozoic intracontinental granites in the Guangzhou region of South China: Partial melting of a metasediment-dominated crustal source.LITHOS,376,14.
MLA Liu, Xiao,et al."Early Paleozoic intracontinental granites in the Guangzhou region of South China: Partial melting of a metasediment-dominated crustal source".LITHOS 376(2020):14.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。