Characteristics and its geological significance of fluid inclusions in Chehugou porphyry Mo-Cu deposit, Xilamulun molybdenum metallogenic belt
文献类型：期刊论文
| 作者 | Chu ShaoXiong1,2; Zeng QingDong1; Liu JianMing1; Zhang WeiQing1,2; Zhang ZuoLun1,3; Zhang Song1,2; Wang ZaiCong1,2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2010-08-01 |
| 卷号 | 26期号:8页码:2465-2481 |
| 关键词 | Xilamulun Molybdenum Metallogenic Belt Porphyry Mo-cu Deposit Fluid Inclusion Chehugou Inner Mongolia |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | Chehugou Mo-Cu deposit is a typical porphyry Mo-Cu deposit in the Xilamulun molybdenum metallogenic belt on the northern margin of North China Craton (MNCC). It locates to the south of the MNCC fault. The orebodies are mainly hosted in granite porphyry. The Mo mineralization is characterized by veinlet-disseminated mineralization as well as breccia type and quartz vein type mineralization. According to crosscutting relationships of different veins and mineral parageneses, ore-forming process can be divided into four stages; (1) the pyrite-molybdenite-quartz stage; (2) the pyrite -chalcopyrite-quartz +/- molybdenite stage; (3) the pyrite-quartz stage; and (4) the quartz-carbonate +/- fluorite stage. Petrographic study of fluid inclusions suggests that six dominant types of fluid inclusions related to metallogensis are present in the deposit; I -Type CO(2)-bearing three-phase (L(CO2) + V(CO2) + L(H2O)), II-Type daughter-minerals bearing three-phase (V-L + S), III-Type gas-rich (V-L), IV-Type liquid-rich (L-V), V-Type pure gas (V) and VI-Type pure liquid (L) phase inclusions. Types of fluid inclusions regular), evolves from the early stage to the late stage. Fluid inclusions in the first and the second stage are characterized with I -Type CO(2)-bearing three-phase (L(CO2) + V(CO2) + L(H2O)) and II-Type daughter-minerals bearing three-phase (V-L + S) inclusion. But in the later the third and the fourth stage which are characterized with III-Type gas-rich (L) and IV-Type liquid-rich (L-V) inclusion. Homogenization temperatures and salinities of ore-forming fluid also regularly evolves from the early stage to the late stage. The peak value of Homogenization temperatures of different stages are separately 270 similar to 400 degrees C, 230 similar to 370 degrees C, 160 similar to 290 degrees C, 120 similar to 230 degrees C, showing a reducing tendency from the early stage to the late stage; Fluid salinities of the first stage could subdivide into two groups; 3.39% similar to 14.25% NaCleqv and 31. 01% similar to > 66. 75% NaClegv. Fluid salinities of the second stage also could be subdivided into two groups; 1.23% similar to 12. 85% NaCleqv and 31. 14% similar to 64. 33% NaCleqv. Fluid salinities of the third and the fourth stage are separately 1. 05% similar to 21. 47% NaCleqv and 2. 07% similar to 10. 73% NaCleqv,, which is showing a reducing tendency. Laser Raman spectroscopic and inclusion groups components studies indicate that components of ore-forming fluid mostly contains H(2)O, CO(2), Cl(-), SO(4)(2-), Na(+) and minor F(-), Ca(2+), Mg(2+). Diagnostic ion ratios indicates that ore-forming fluid is derived from magmatic fluid. Petrographic and microthermometric study indicate that the early first and the second stage high temperature, high salinities, CO(2)-bearing NaCl-H(2)O-CO(2) system ore-forming fluid occurs boiling and phase separation. With fluid boiling. CO(2) escaping and temperature decreasing, abundant metal sulfides precipitate. In the later third and fourth stage, ore-forming fluid system tends to open when atmospheric condensation interfuses into the system; ore-forming fluid evolves to middle-low temperature, middle-low salinitie and CO(2)-poor NaCl-H(2)O system. |
| WOS关键词 | NORTH CHINA CRATON ; INNER-MONGOLIA ; GOLD DEPOSITS ; HYDROTHERMAL FLUIDS ; MAGMATIC FLUIDS ; ORE-DEPOSITS ; GEOCHRONOLOGY ; GEOCHEMISTRY ; ORIGIN ; CONSTRAINTS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000281472400019 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/73426]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chu ShaoXiong |
| 作者单位 | 1.Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.China Railway Resources Grp Co LTD, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu ShaoXiong,Zeng QingDong,Liu JianMing,et al. Characteristics and its geological significance of fluid inclusions in Chehugou porphyry Mo-Cu deposit, Xilamulun molybdenum metallogenic belt[J]. ACTA PETROLOGICA SINICA,2010,26(8):2465-2481. |
| APA | Chu ShaoXiong.,Zeng QingDong.,Liu JianMing.,Zhang WeiQing.,Zhang ZuoLun.,...&Wang ZaiCong.(2010).Characteristics and its geological significance of fluid inclusions in Chehugou porphyry Mo-Cu deposit, Xilamulun molybdenum metallogenic belt.ACTA PETROLOGICA SINICA,26(8),2465-2481. |
| MLA | Chu ShaoXiong,et al."Characteristics and its geological significance of fluid inclusions in Chehugou porphyry Mo-Cu deposit, Xilamulun molybdenum metallogenic belt".ACTA PETROLOGICA SINICA 26.8(2010):2465-2481. |
入库方式： OAI收割
来源：地质与地球物理研究所
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