Early Palaeozoic high-Mg basalt-andesite suite in the Duobaoshan Porphyry Cu deposit, NE China: Constraints on petrogenesis, mineralization, and tectonic setting

doi:10.1016/j.gr.2019.01.015

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院矿产资源研究重点实验室

	Early Palaeozoic high-Mg basalt-andesite suite in the Duobaoshan Porphyry Cu deposit, NE China: Constraints on petrogenesis, mineralization, and tectonic setting
	Zhao, Chao 1,2,3; Qin, Ke-Zhang 1,2,3; Song, Guo-Xue 3; Li, Guang-Ming 1,2; Li, Zhen-Zhen 1,2
刊名	GONDWANA RESEARCH
	2019-07-01
卷号	71 页码:91-116
关键词	Early Palaeozoic High-Mg basalt-andesite Porphyry Cu deposit Eastern CAOB
ISSN号	1342-937X
DOI	10.1016/j.gr.2019.01.015
英文摘要	High-Mg basalt-andesite suites are extremely rare in the modern Earth but genetically important for indicating essential crust-mantle interactions, ascertaining critical geodynamic settings, and understanding the formation of porphyry copper deposits. Secondary ion mass spectrometry (SIMS) and laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) zircon U-Pb dating and geochemistry document an early Palaeozoic high-Mg basalt-andesite suite from the Duobaoshan porphyry Cu deposit, eastern Central Asian Orogenic Belt (CAOB). Dating results reveal that the Duobaoshan high-Mg basalt and andesite erupted ca. 506 Ma and ca. 485 Ma, respectively. These high-Mg samples are typical subduction-related volcanic rocks with SiO2 contents of 47.73 to 55.16 wt%, high MgO (6.08 to 10.82 wt%), and high Mg# (58 to 67) and feature enrichments in large ion lithophile elements (LILEs) and depletions in high field strength elements (HFSEs). The samples have juvenile whole-rock initial Sr-87/Sr-86 ratios of 0.70272 to 0.70451, epsilon(Nd)(t) of 4.8 to 8.7 (average 7.23), and zircon epsilon(Hf)(t) of 7.3 to 15.9. Additionally, they have high Sr (average 619.36 ppm) and low Y (average 11.92 ppm) and Yb (average 1.21 ppm) contents that show affinity with adakitic high-Mg basalts and andesites worldwide. These high-Mg, depleted mantle-like isotopic and adakitic geochemical features imply a depleted mantle source variably assimilated by slab-derived melts under a sustained subduction tectonic setting. We also propose that the Duobaoshan high-Mg basalt-andesite suite, as the parental source magma, fertilized the overlying Duobaoshan porphyry Cu deposit by providing water, copper, and sulphur and high oxygen fugacity. A comprehensive comparison of the post-ore volcanic rocks shows that they might have originated from the slab-derived fluid metasomatized depleted mantle wedge, which had different properties from the mantle that produced the pre- and syn-ore volcanic intrusive rocks. The post-ore volcanic rocks underwent little crustal evolution en route to the surface during a reworked subduction event, which indicates a relatively immature island arc environment. (C) 2019 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
资助项目	National Key R&D Program of China[2017YFC0601306] ; National Natural Science Foundation of China[41390444] ; National Natural Science Foundation of China[41672090] ; National Natural Science Foundation of China[41572064] ; Heilongjiang Duobaoshan Copper Industry Co., Ltd.
WOS关键词	HIGH-MAGNESIAN ANDESITES ; SETOUCHI VOLCANIC BELT ; U-PB AGES ; TRACE-ELEMENT TRANSPORT ; SUBDUCTED OCEANIC-CRUST ; ASIAN OROGENIC BELT ; RARE-EARTH-ELEMENTS ; I-TYPE GRANITES ; HEILONGJIANG PROVINCE ; CONTINENTAL-CRUST
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000486980900006
资助机构	National Key R&D Program of China ; National Key R&D Program of China ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; National Key R&D Program of China ; National Key R&D Program of China ; 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd. ; Heilongjiang Duobaoshan Copper Industry Co., Ltd.
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/93690]
专题	地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者	Zhao, Chao; Qin, Ke-Zhang
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, POB 9825, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Chao,Qin, Ke-Zhang,Song, Guo-Xue,et al. Early Palaeozoic high-Mg basalt-andesite suite in the Duobaoshan Porphyry Cu deposit, NE China: Constraints on petrogenesis, mineralization, and tectonic setting[J]. GONDWANA RESEARCH,2019,71:91-116.
APA	Zhao, Chao,Qin, Ke-Zhang,Song, Guo-Xue,Li, Guang-Ming,&Li, Zhen-Zhen.(2019).Early Palaeozoic high-Mg basalt-andesite suite in the Duobaoshan Porphyry Cu deposit, NE China: Constraints on petrogenesis, mineralization, and tectonic setting.GONDWANA RESEARCH,71,91-116.
MLA	Zhao, Chao,et al."Early Palaeozoic high-Mg basalt-andesite suite in the Duobaoshan Porphyry Cu deposit, NE China: Constraints on petrogenesis, mineralization, and tectonic setting".GONDWANA RESEARCH 71(2019):91-116.