Magmatic constraints on the Ermi porphyry copper mineralization, Northeast China: Evidence from zircon U-Pb geochronology, whole-rock geochemistry and Sr-Nd-Hf isotopic geochemistry
文献类型：期刊论文
| 作者 | Chu, Xiaolei1,2; Sun, Jinggui2,3; Zhang, Yong1; Liu, Yang2; Xu, Zhikai2; Han, Jilong2,4; Zhao, Chuntao2; Liu, Yanpeng2; Qin, Kezhang5 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 136页码:17 |
| 关键词 | Zircon U-Pb dating Geochemistry Sr-Nd-Hf isotopes Porphyry copper metallogenic system Ermi Cu deposit Northeast China |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2021.104294 |
| 英文摘要 | The Ermi porphyry Cu deposit (PCD), located on the northeastern margin of the North China Craton (NCC), is a medium-sized PCD with a reserve of 0.11 Mt and an average grade of 0.6% Cu. Copper mineralization occurs mainly within the intrusions of quartz diorite, granodiorite, granodiorite porphyry and granite porphyry. To reveal the magmatic contributions to mineralization, we conducted zircon U-Pb dating and element geochemical and Sr-Nd-Hf isotope analyses of mineralized intrusions at Ermi on the basis of field and petrographic observations. The zircon LA-ICP-MS U-Pb ages of quartz diorite, granodiorite, granodiorite porphyry and granite porphyry are 95.0 +/- 1.0 Ma (n = 16, MSWD = 0.97), 94.2 +/- 1.4 Ma (n = 15, MSWD = 0.93), 93.9 +/- 1.2 Ma (n = 19, MSWD = 0.22) and 92.0 +/- 1.2 Ma (n = 18, MSWD = 0.41), respectively. All of these intrusive rocks belong to metaluminous, calc-alkaline I-type granites. They exhibit high Sr-87/Sr-86(t) values (0.7075 to 0.7084), low negative epsilon Nd(t) values (-16.7 to-12.6), and variable but mainly negative epsilon Hf(t) values (-12.4 to-6.4), with corresponding TDM2(Hf) ages of 2.1 2.7 Ga. These findings indicate that the initial magma originated from the partial melting of the Archean lower crust of the NCC. Combined with the dynamic background of the study area, we believe that they formed in an active continental margin environment related to the rollback of the sub ducting Paleo-Pacific slab in the Cretaceous. The oxygen fugacity (fO2) values estimated from rare earth element (REE) and Ti concentrations in zircons show that: The fayalite-magnetite-quartz buffer (Delta FMQ) values of the quartz diorite and granodiorite are-2.6 and 0.87, respectively. The Delta FMQ values of the granodiorite porphyry and granite porphyry are 2.68 and 2.13, respectively. The high oxygen fugacity promoted the enrichment of Cu and other ore-forming elements in the magma. However, the results of estimating crustal thickness from the (La/Yb)N ratio of magma show that the Ermi PCD formed under the condition of a thinned or shallow lower crust (<25 km). Thinned continental crust may lack massive sulfide accumulation and is not conducive to the largescale storage and accumulation of fertile magmas in the middle or upper crust, which may limit the mineralization scale of the Ermi PCD. |
| WOS关键词 | EPITHERMAL GOLD DEPOSITS ; SOUTHERN JILIN PROVINCE ; MESOZOIC VOLCANIC-ROCKS ; ANSHAN-BENXI AREA ; A-TYPE GRANITE ; LIAO-JI BELT ; NE CHINA ; TRACE-ELEMENT ; ARC MAGMAS ; CONTINENTAL-CRUST |
| 资助项目 | National Key R&D Program of China[2017YFC0601306] ; MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS[ZS2007] ; Program of the China Geological Survey[DD20190368] ; Geological Exploration Foundation of People's Government of Jilin Province[2018-09] ; National Natural Science Foundation of China[41602084] ; National Natural Science Foundation of China[41973045] ; Graduate Innovation Fund of Jilin University[101832020CX222] |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000671818500001 |
| 出版者 | ELSEVIER |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS ; MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS ; Program of the China Geological Survey ; Program of the China Geological Survey ; Geological Exploration Foundation of People's Government of Jilin Province ; Geological Exploration Foundation of People's Government of Jilin Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Graduate Innovation Fund of Jilin University ; Graduate Innovation Fund of Jilin University ; National Key R&D Program of China ; National Key R&D Program of China ; MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS ; MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS ; Program of the China Geological Survey ; Program of the China Geological Survey ; Geological Exploration Foundation of People's Government of Jilin Province ; Geological Exploration Foundation of People's Government of Jilin Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Graduate Innovation Fund of Jilin University ; Graduate Innovation Fund of Jilin University ; National Key R&D Program of China ; National Key R&D Program of China ; MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS ; MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS ; Program of the China Geological Survey ; Program of the China Geological Survey ; Geological Exploration Foundation of People's Government of Jilin Province ; Geological Exploration Foundation of People's Government of Jilin Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Graduate Innovation Fund of Jilin University ; Graduate Innovation Fund of Jilin University ; National Key R&D Program of China ; National Key R&D Program of China ; MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS ; MNR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, CAGS ; Program of the China Geological Survey ; Program of the China Geological Survey ; Geological Exploration Foundation of People's Government of Jilin Province ; Geological Exploration Foundation of People's Government of Jilin Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Graduate Innovation Fund of Jilin University ; Graduate Innovation Fund of Jilin University |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102003]  |
| 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 | Sun, Jinggui; Zhang, Yong |
| 作者单位 | 1.Chinese Acad Geol Sci, Inst Mineral Resources, MLR Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China 2.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China 3.Minist Nat Resources, Key Lab Mineral Resources Evaluat Northeast Asia, Changchun 130061, Peoples R China 4.China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu, Xiaolei,Sun, Jinggui,Zhang, Yong,et al. Magmatic constraints on the Ermi porphyry copper mineralization, Northeast China: Evidence from zircon U-Pb geochronology, whole-rock geochemistry and Sr-Nd-Hf isotopic geochemistry[J]. ORE GEOLOGY REVIEWS,2021,136:17. |
| APA | Chu, Xiaolei.,Sun, Jinggui.,Zhang, Yong.,Liu, Yang.,Xu, Zhikai.,...&Qin, Kezhang.(2021).Magmatic constraints on the Ermi porphyry copper mineralization, Northeast China: Evidence from zircon U-Pb geochronology, whole-rock geochemistry and Sr-Nd-Hf isotopic geochemistry.ORE GEOLOGY REVIEWS,136,17. |
| MLA | Chu, Xiaolei,et al."Magmatic constraints on the Ermi porphyry copper mineralization, Northeast China: Evidence from zircon U-Pb geochronology, whole-rock geochemistry and Sr-Nd-Hf isotopic geochemistry".ORE GEOLOGY REVIEWS 136(2021):17. |
入库方式： OAI收割
来源：地质与地球物理研究所
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