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
Origin of the late Paleoproterozoic low-delta O-18 A-type granites on the southern margin of the North China Craton and their geodynamic mechanism

文献类型：期刊论文

作者Deng, Xiaoqin1,6; Peng, Touping2,5; Zhou, Yanyan3; Zhao, Taiping4; Qiu, Zhili6
刊名PRECAMBRIAN RESEARCH
出版日期2020-12-01
卷号351页码:13
关键词A-type granite Low-delta O-18 magma Late Paleoproterozoic Xiong'er rift Southern margin of the North China Craton
ISSN号0301-9268
DOI10.1016/j.precamres.2020.105960
英文摘要A-type granites with O-18-depletion signatures are rather enigmatic as regards not only their typology and petrogenesis but also their rock-forming geodynamic mechanism. Here we report a suite of late Paleopmterozoic low-delta O-18 A-type granites from the Longwangzhuang pluton on the southern margin of the North China Craton. SIMS zircon U-Pb dating showed that the Longwangzhuang pluton was emplaced at 1613 +/- 4 Ma. Combined with previous data, it is clear that the mineral components of Longwangzhuang granites are variable and consist of perthite, quartz, plagioclase, biotite and amphibole (calcic hastingsite, ferroedenite, and sodic ferrogedrite). Geochemically, they are metaluminous to peraluminous and have high alkali contents (K2O + Na2O > 8.76 wt%, K2O/Na2O > 1), FeOt/(FeOt + MgO) (>0.95) ratios, Zr + Nb + Ce + Y (>993 ppm) contents, and 10000 Ga/Al (>4.31) ratios, resembling A-type granites. In-situ oxygen isotope analysis displayed low zircon delta O-18 values between 4.0 parts per thousand and 4.9 parts per thousand with a weighted average of 4.4 parts per thousand. Based on the Archean two-stage zircon Hf and whole-rock Nd model ages coupled with the low (La/Yb)(CN) ratios, negative anomalies of Eu and Sr, and high Zr saturation temperatures, and the presence of low pressures (3.3-5.7 kbar) amphiboles, the Longwangzhuang A-type granites were generated by "self-cannibalizing" pre-existing low-delta O-18 old rocks (i.e., the Taihua Complex) and emplaced at shallow depth. Combined with regional geological observations (i.e., coeval tuffites), a passive rift setting was the most plausible explanation for the generation of the late Paleoproterozoic low delta O-18 A-type granites on the southern margin of the North China Craton. Such a rifting could likely have lasted at least till 1.6 Ga.
WOS关键词ZIRCON U-PB ; GEOCHEMICAL CONSTRAINTS ; CRUSTAL EVOLUTION ; ISOTOPE COMPOSITIONS ; SILICIC MAGMATISM ; LIAONING PROVINCE ; DEPOSITIONAL AGE ; IGNEOUS PROVINCE ; LULIANG COMPLEX ; OXYGEN ISOTOPES
资助项目National Natural Science Foundation of China, China[41630211] ; National Natural Science Foundation of China, China[41703028] ; National Natural Science Foundation of China, China[42073008]
WOS研究方向Geology
语种英语
WOS记录号WOS:000595149400015
出版者ELSEVIER
资助机构National Natural Science Foundation of China, China ; National Natural Science Foundation of China, China ; National Natural Science Foundation of China, China ; National Natural Science Foundation of China, China ; National Natural Science Foundation of China, China ; National Natural Science Foundation of China, China ; National Natural Science Foundation of China, China ; National Natural Science Foundation of China, China
源URL[http://ir.iggcas.ac.cn/handle/132A11/99909]  
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Zhao, Taiping
作者单位1.Guangdong Acad Sci, Guangdong Inst Microbiol, Guangdong Prov Key Lab Microbial Culture Collect, State Key Lab Appl Microbiol Southern China, Guangzhou 510070, Peoples R China
2.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China
5.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China
6.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangzhou 510275, Peoples R China
推荐引用方式
GB/T 7714		 Deng, Xiaoqin,Peng, Touping,Zhou, Yanyan,et al. Origin of the late Paleoproterozoic low-delta O-18 A-type granites on the southern margin of the North China Craton and their geodynamic mechanism[J]. PRECAMBRIAN RESEARCH,2020,351:13.
APA Deng, Xiaoqin,Peng, Touping,Zhou, Yanyan,Zhao, Taiping,&Qiu, Zhili.(2020).Origin of the late Paleoproterozoic low-delta O-18 A-type granites on the southern margin of the North China Craton and their geodynamic mechanism.PRECAMBRIAN RESEARCH,351,13.
MLA Deng, Xiaoqin,et al."Origin of the late Paleoproterozoic low-delta O-18 A-type granites on the southern margin of the North China Craton and their geodynamic mechanism".PRECAMBRIAN RESEARCH 351(2020):13.

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。