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Petrogenesis and tectonic setting of ore-related porphyry in the Duobaoshan Cu deposit within the eastern Central Asian Orogenic Belt, Heilongjiang Province, NE China
Zhao, Chao1,2,3; Qin, Kezhang1,2,3; Song, Guoxue3; Li, Guangming1,2; Li, Zhenzhen1,2; Pang, Xuyong1,2,3; Wang, Le1,2,3
2018-10-01
发表期刊JOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
卷号165页码:352-370
摘要The Duobaoshan porphyry Cu deposit (2.37 Mt Cu @ 0.47%; 73.4 tons Au @ 0.144 g/t and 80,000 tons Mo @ 0.016%) is located in the eastern part of the Central Asian Orogenic Belt (CAOB). Mineralization mainly occurs in the granodiorite and Ordovician volcanic rocks, and SIMS zircon U-Pb dating indicates that the ore-forming granodiorite porphyry emplaced at around 477 Ma. In addition, whole-rock major and trace element compositions show that the granodiorite porphyry belongs to a high-K to medium-K calc-alkaline series and has an affinity of adakitic rocks with high Sr, and low Y and Yb. Granodiorite porphyry samples are enriched in large ion lithophile elements (LILE) and light rare earth elements (LREE), and are depleted in high field strength elements (HFSE) and heavy rare earth elements (HREE). Their geochemical natures show a high Ni content (average 45.5 ppm) and Mg-# value (average 46). The granodiorite porphyry shows very low initial Sr-87/Sr-86 ratios (from 0.70279 to 0.70414) and low 8180 (mean = +5.38%o), very high epsilon(Nd)(t) values (mean = + 4.7) and epsilon(Hf)(t) values (mean = + 12.11), and very young two-stage Hf and Nd model ages (average 765 Ma and 827 Ma, respectively). Given that the ore-related intrusions are coeval with the high-Mg diorites and and esites in the region, it is proposed that both the ore-related granodiorite porphyry and granodiorite were derived from melting of a thickened juvenile mafic lower crust, which was induced by underplating of melts from a depleted mantle wedge above a subduction zone. A certain proportion of slab melts may also have been involved in the magmas that produced ore-related intrusions.
关键词Duobaoshan deposit Ore-related porphyry SIMS zircon U-Pb age Geochemistry Sr-Nd-Hf-O isotopes Eastern CAOB
DOI10.1016/j.jseaes.2018.07.002
资助者National Natural Science Foundation 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
关键词[WOS]TRONDHJEMITE-GRANODIORITE TTG ; UNDERPLATED BASALTIC CRUST ; SETOUCHI VOLCANIC BELT ; U-PB GEOCHRONOLOGY ; HIGH-MG ANDESITES ; CONTINENTAL-CRUST ; GEOLOGICAL SIGNIFICANCE ; ADAKITIC MAGMAS ; SOUTHWEST JAPAN ; FLAT SUBDUCTION
语种英语
资助项目National Natural Science Foundation of China[41390444] ; National Natural Science Foundation of China[41572064]
资助者National Natural Science Foundation 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 ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000449447300021
出版者PERGAMON-ELSEVIER SCIENCE LTD
引用统计
文献类型期刊论文
条目标识符http://ir.iggcas.ac.cn/handle/132A11/89441
专题矿产资源研究院重点实验室
通讯作者Qin, Kezhang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Zhao, Chao,Qin, Kezhang,Song, Guoxue,et al. Petrogenesis and tectonic setting of ore-related porphyry in the Duobaoshan Cu deposit within the eastern Central Asian Orogenic Belt, Heilongjiang Province, NE China[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,165:352-370.
APA Zhao, Chao.,Qin, Kezhang.,Song, Guoxue.,Li, Guangming.,Li, Zhenzhen.,...&Wang, Le.(2018).Petrogenesis and tectonic setting of ore-related porphyry in the Duobaoshan Cu deposit within the eastern Central Asian Orogenic Belt, Heilongjiang Province, NE China.JOURNAL OF ASIAN EARTH SCIENCES,165,352-370.
MLA Zhao, Chao,et al."Petrogenesis and tectonic setting of ore-related porphyry in the Duobaoshan Cu deposit within the eastern Central Asian Orogenic Belt, Heilongjiang Province, NE China".JOURNAL OF ASIAN EARTH SCIENCES 165(2018):352-370.
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