Formation of the giant Chalukou porphyry Mo deposit in northern Great Xing'an Range, NE China: Partial melting of the juvenile lower crust in intra-plate extensional environment
文献类型：期刊论文
| 作者 | Li, Zhen-Zhen1,2; Qin, Ke-Zhang1; Li, Guang-Ming1; Ishihara, Shunso3; Jin, Lu-Ying1,2; Song, Guo-Xue1; Meng, Zhao-Jun4 |
| 刊名 | LITHOS
 |
| 出版日期 | 2014-08-01 |
| 卷号 | 202页码:138-156 |
| 关键词 | Chalukou porphyry Molybdenum deposit Zircon U-Pb age dating Juvenile lower crust Extensional setting Sr-Nd isotope Zircon Hf isotope |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2014.04.018 |
| 文献子类 | Article |
| 英文摘要 | The Chalukou porphyry Mo deposit (2.46 Mt @0.087% Mo), located in the northern Great Xing'an Range, NE China, is the largest Mo deposit discovered in China so far. The host rocks consist of aplite porphyry, granite porphyry and quartz porphyry, and are intruded into Lower Ordovician intermediate-felsic volcanic-sedimentary rocks and pre-ore monzogranite and are cut by post-ore feldspar porphyry, diorite porphyry and quartz monzonite porphyry. Here, we present the zircon U-Pb ages, whole-rock geochemistry, Sr-Nd isotopic and zircon Hf isotopic data for the pre-ore, syn-ore and post-ore intrusive rocks. The Chalukou ore-forming porphyries intruded during 147148 Ma and have high-silica, alkali-rich, metaluminous to slightly peraluminous compositions and are oxidized. They are enriched in large ion lithophile elements (e.g. K, Rb, U and Th), light REE and depleted in high-field strength elements (e.g. Nb, P and Ti). Depletions in Eu, Ba, Sr, Nb, Ta, P and Ti suggest that they have experienced strong fractional crystallization of plagioclase, biotite, hornblende and accessory minerals. The pre-ore monzogranite (similar to 172 Ma) also belongs to the high-K calc-alkaline series. Highly fractionated REE patterns ((La/Yb) (N) = 19.6-21.7), high values of Sr/Y (54-69) and La/Yb (29-32), are adakite-like geochemical features. The post-ore rocks (similar to 141-128 Ma) have similar geochemical characteristics with ore-forming porphyries except that quartz monzonite porphyry shows no Ba-Sr negative anomaly. All intrusive rocks have relative low initial Sr-87/Sr-86 (0.705413-0.707889) and epsilon Nd (t) values (-1.28 to + 0.92), positive epsilon Hf (t) values (+ 2.4 to + 10.1) and young two-stage Nd and Hf model ages (T-DM2 (Nd) = 863-977 Ma, T-DM2 (Hf) = 552-976 Ma). These geochemical and isotopic data are interpreted to demonstrate that the ore-forming porphyries formed by partial melting of the juvenile lower crust caused by underplating of mafic magmas in an intra-plate extensional setting. The pre-ore monzogranite formed by partial melting of thickened lower crust in a collisional setting caused by closure of Mongol-Okhotsk Ocean. The post-ore feldspar porphyry shares a similar magma source with ore-forming porphyry, but the quartz monzonite porphyry has a relatively deeper magma source region and has not experienced as much fractional crystallization. The transformation from middle Jurassic compression to late Jurassic extension created favorable conditions for the generation and emplacement of the ore-forming magma. The juvenile lower crust provided the main source of molybdenum for Chalukou deposit. Enrichment of Mo by fractional crystallization played an important role in concentrating Mo during formation of the Chalukou Mo deposit. The age (similar to 147 Ma), high fluorine, and associated Pb-Zn deposits are all different from other major porphyry Mo deposits in NE China; Chalukou is a new mineral deposit type in the Great Xing'an Range. (C) 2014 Elsevier B.V. All rights reserved. |
| WOS关键词 | ZIRCON U-PB ; A-TYPE GRANITES ; STOCKWORK MOLYBDENUM DEPOSITS ; MONGOL-OKHOTSK OCEAN ; I-TYPE GRANITES ; INNER-MONGOLIA ; NORTHEASTERN CHINA ; HF ISOTOPES ; GEOLOGICAL SIGNIFICANCE ; METALLOGENIC BELT |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000340853000009 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Natural Science Foundation of China Project(41272108 ; National Natural Science Foundation of China Project(41272108 ; Jinxin mining company and 706 Geological Party of Heilongjiang Geoexploration Bureau for Nonferrous Metals ; Jinxin mining company and 706 Geological Party of Heilongjiang Geoexploration Bureau for Nonferrous Metals ; 41390444) ; 41390444) ; National Natural Science Foundation of China Project(41272108 ; National Natural Science Foundation of China Project(41272108 ; Jinxin mining company and 706 Geological Party of Heilongjiang Geoexploration Bureau for Nonferrous Metals ; Jinxin mining company and 706 Geological Party of Heilongjiang Geoexploration Bureau for Nonferrous Metals ; 41390444) ; 41390444) ; National Natural Science Foundation of China Project(41272108 ; National Natural Science Foundation of China Project(41272108 ; Jinxin mining company and 706 Geological Party of Heilongjiang Geoexploration Bureau for Nonferrous Metals ; Jinxin mining company and 706 Geological Party of Heilongjiang Geoexploration Bureau for Nonferrous Metals ; 41390444) ; 41390444) ; National Natural Science Foundation of China Project(41272108 ; National Natural Science Foundation of China Project(41272108 ; Jinxin mining company and 706 Geological Party of Heilongjiang Geoexploration Bureau for Nonferrous Metals ; Jinxin mining company and 706 Geological Party of Heilongjiang Geoexploration Bureau for Nonferrous Metals ; 41390444) ; 41390444) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/85552]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Qin, Ke-Zhang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Geol Survey Japan, AIST, Tsukuba, Ibaraki 3058567, Japan 4.706 Geol Party Heilongjiang Geoexplorat Bur Nonfe, Qiqihar 161006, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Zhen-Zhen,Qin, Ke-Zhang,Li, Guang-Ming,et al. Formation of the giant Chalukou porphyry Mo deposit in northern Great Xing'an Range, NE China: Partial melting of the juvenile lower crust in intra-plate extensional environment[J]. LITHOS,2014,202:138-156. |
| APA | Li, Zhen-Zhen.,Qin, Ke-Zhang.,Li, Guang-Ming.,Ishihara, Shunso.,Jin, Lu-Ying.,...&Meng, Zhao-Jun.(2014).Formation of the giant Chalukou porphyry Mo deposit in northern Great Xing'an Range, NE China: Partial melting of the juvenile lower crust in intra-plate extensional environment.LITHOS,202,138-156. |
| MLA | Li, Zhen-Zhen,et al."Formation of the giant Chalukou porphyry Mo deposit in northern Great Xing'an Range, NE China: Partial melting of the juvenile lower crust in intra-plate extensional environment".LITHOS 202(2014):138-156. |
入库方式： OAI收割
来源：地质与地球物理研究所
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