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  4. 岩石圈演化国家重点实验室
Generation of Cretaceous high-silica granite by complementary crystal accumulation and silicic melt extraction in the coastal region of southeastern China

文献类型：期刊论文

作者Jing-Yuan Chen1,4; Jin-Hui Yang1,2; Ji-Heng Zhang2; Jin-Feng Sun2; Yu-Sheng Zhu1; Hartung, Eva3
刊名GEOLOGICAL SOCIETY OF AMERICA BULLETIN
出版日期2022
卷号134期号:1-2页码:201-222
ISSN号0016-7606
DOI10.1130/B35745.1
英文摘要It is generally hypothesized that high silica (SiO2 > 75 wt%) granite (HSG) originates from crystal fractionation in the shallow crust. Yet, identifying the complementary cumulate residue of HSG within plutons remains difficult. In this work, we examine the genetic links between the porphyritic monzogranite and HSG (including porphyritic granite, monzogranite, and alkali feldspar granite) from the coastal area of southeastern China using detailed zircon U-Pb ages, trace elements, Hf-O isotopes, and whole-rock geochemistry and Nd-Hf isotopic compositions. Zircon U-Pb ages indicate that the porphyritic monzogranite and HSG are coeval (ca. 96-99 Ma). The HSG and porphyritic monzogranite have similar formation ages within analytic error, identical mineral assemblages, similar Nd-Hf isotopic compositions, and consistent variations in their zircon compositions (i.e., Eu/Eu*, Zr/Hf, and Sm/Yb), which suggests that their parental magma came from a common silicic magma reservoir and that the lithological differences are the result of melt extraction processes. The porphyritic monzogranite has relatively high SiO2 (70.0-73.4 wt%), Ba (718-1070 ppm), and Sr (493-657 ppm) contents, low K2O and Rb concentrations and low Rb/Sr ratios (0.1-0.2), and it displays weak Eu anomalies (Eu/Eu* = 0.57-0.90). Together with the petrographic features of the porphyritic monzogranite, these geochemical variations indicate that the porphyritic monzongranite is the residual silicic cumulate of the crystal mush column. The HSG (SiO2 = 75.0-78.4) has variable Rb/Sr ratios (2-490) and very low Sr (1-109 ppm) and Ba (9-323 ppm) contents. Zircon from the HSG and porphyritic monzogranite overlap in Eu/Eu*, Zr/Hf, and Sm/Yb ratios and Hf contents; however, some zircon from the HSG show very low Eu/Eu* (<0.1) and Zr/Hf ratios. These features suggest that the HSG represents the high-silica melt that was extracted from a crystal-rich mush. The injection of mantle-derived hotter mafic magma into the mush column and the exsolution of F/Cl--enriched volatiles (or fluids) from the interstitial melt rejuvenated the pre-existing highly crystalline mush. Subsequent extraction and upward migration of silicic melt resulting from compaction of the mush column formed the HSG at shallow crustal levels, which left the complementary crystal residue solidified as porphyritic monzogranite at the bottom.
WOS关键词A-TYPE GRANITES ; ZIRCON U-PB ; SE CHINA ; SOUTH CHINA ; GEOCHEMICAL CONSTRAINTS ; ISOTOPIC COMPOSITIONS ; MAGMATIC PROCESSES ; CONTINENTAL-CRUST ; ZHEJIANG PROVINCE ; CATHAYSIA BLOCK
资助项目National Natural Science Foundation of China[42073033] ; Chinese Ministry of Science and Technology[2012CB416702] ; Fundamental Research Funds for the Central Universities, Chang'an University
WOS研究方向Geology
语种英语
出版者GEOLOGICAL SOC AMER, INC
WOS记录号WOS:000740439000004
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Chinese Ministry of Science and Technology ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University ; Fundamental Research Funds for the Central Universities, Chang'an University
源URL[http://ir.iggcas.ac.cn/handle/132A11/103982]  
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Jing-Yuan Chen
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, POB 9825, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Univ Liverpool, Dept Earth Ocean & Ecol Sci, Liverpool L69 3GP, Merseyside, England
4.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China
推荐引用方式
GB/T 7714		 Jing-Yuan Chen,Jin-Hui Yang,Ji-Heng Zhang,et al. Generation of Cretaceous high-silica granite by complementary crystal accumulation and silicic melt extraction in the coastal region of southeastern China[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2022,134(1-2):201-222.
APA Jing-Yuan Chen,Jin-Hui Yang,Ji-Heng Zhang,Jin-Feng Sun,Yu-Sheng Zhu,&Hartung, Eva.(2022).Generation of Cretaceous high-silica granite by complementary crystal accumulation and silicic melt extraction in the coastal region of southeastern China.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,134(1-2),201-222.
MLA Jing-Yuan Chen,et al."Generation of Cretaceous high-silica granite by complementary crystal accumulation and silicic melt extraction in the coastal region of southeastern China".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 134.1-2(2022):201-222.

入库方式： OAI收割

来源：地质与地球物理研究所

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