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Geology and ore-forming fluid evolution of the Aktogai giant porphyry Cu deposit, Kazakhstan
Li, Changhao1,2,3; Shen, Ping1,2,3; Pan, Hongdi4; Cao, Chong1,2,3; Seitmuratova, Eleonora5
2018-10-01
发表期刊JOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
卷号165页码:192-209
摘要The Aktogai Group (more than 12.5Mt of Cu and 80t of Au) is located in the western part of the Central Asia' Orogenic Belt (CAOB). The mineralization of the Aktogai deposit is associated with the Early Carboniferous tonalite porphyry which intruded into the Koldar complex. The ore-forming tonalite porphyry has higher oxygei fugacity and sulfur contents than those of wall rocks based on results of mineralogical chemistry analyses Hydrothermal fluid activities result in the potassic, sericite(-chlorite) and propylitic alteration, and are associated with disseminated and/or vein mineralization. The alteration and mineralization include three stages Potassic stage is characterized by hydrothermal K-feldspar, biotite, magnetite, "A" veins and disseminated mineralization. Sericite(-chlorite) stage that partly overprinted on potassic stage is characterized by sericite chlorite, "C" veins and disseminated mineralization. Propylitic stage is characterized by chlorite, epidote and "C" veins, and develops in the tonalite porphyry and wall rocks. Five types of fluid inclusions have been recognize in the Aktogai deposit, including liquid-rich (L-type), vapor-rich (V-type), daughter mineral-bearing (S-type) CO2-bearing (C-type) and minor SO2-bearing fluid inclusions. In the potassic stage, ore-forming fluid belongs H2O-NaCl-CO2 system with four types fluid inclusions, homogeneous temperatures and salinities of fluid in elusions are 320 degrees C to 448 degrees C and 0.35 wt% to 51.08 wt%, respectively. In the sericite(-chlorite) stage, the fluff belongs to H2O-NaCl-CO2 system with L-type, V-type and C-type fluid inclusions, homogeneous temperature and salinities of fluid inclusions are 243 degrees C to 315 degrees C and 1.22 wt% to 13.27 wt%, respectively. In the propylitio stage, the fluid belongs to H2O-NaCl system with L-type and V-type fluid inclusions, homogeneous temperature and salinities of fluid inclusions are 211 degrees C to 328 degrees C and 0.35 wt% to 11.46 wt%, respectively. A relativell negative delta S-34 parts per thousand values (-4.61 parts per thousand to -3.18 parts per thousand) indicate that the sulfur derived from a high oxygen fugacity magma. Decreases of the temperature, pressure and oxygen fugacity of the ore-forming fluid result in meta precipitation in the Aktogai deposit.
关键词Hydrothermal alteration Fluid evolution Metallogenic mechanism The Aktogai deposit The Central Kazakhstan
DOI10.1016/j.jseaes.2018.07.009
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; National Key R&D Program of China ; National Key R&D Program of China ; National Scientific and Technological Support Project ; National Scientific and Technological Support Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; National Key R&D Program of China ; National Key R&D Program of China ; National Scientific and Technological Support Project ; National Scientific and Technological Support Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; National Key R&D Program of China ; National Key R&D Program of China ; National Scientific and Technological Support Project ; National Scientific and Technological Support Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; National Key R&D Program of China ; National Key R&D Program of China ; National Scientific and Technological Support Project ; National Scientific and Technological Support Project
关键词[WOS]ASIAN OROGENIC BELT ; PALEOZOIC CRUSTAL GROWTH ; COPPER-DEPOSIT ; MICROPHENOCRYSTIC APATITE ; ISOTOPE GEOCHEMISTRY ; TECTONIC SETTINGS ; SULFIDE MINERALS ; OXYGEN FUGACITY ; EAST KOUNRAD ; SO3 CONTENTS
语种英语
资助项目National Natural Science Foundation of China[41390442] ; National Natural Science Foundation of China[U1303293] ; National Natural Science Foundation of China[21850490] ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment[ZS1701] ; National Key R&D Program of China[2017YFC0601201] ; National Scientific and Technological Support Project[2011BAB06B01]
资助者National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; National Key R&D Program of China ; National Key R&D Program of China ; National Scientific and Technological Support Project ; National Scientific and Technological Support Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; National Key R&D Program of China ; National Key R&D Program of China ; National Scientific and Technological Support Project ; National Scientific and Technological Support Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; National Key R&D Program of China ; National Key R&D Program of China ; National Scientific and Technological Support Project ; National Scientific and Technological Support Project ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; Open foundation of MLR key laboratory of Metallogeny and Mineral Assessment ; National Key R&D Program of China ; National Key R&D Program of China ; National Scientific and Technological Support Project ; National Scientific and Technological Support Project
WOS研究方向Geology
WOS类目Geosciences, Multidisciplinary
WOS记录号WOS:000449447300012
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/132A11/89444
专题矿产资源研究院重点实验室
通讯作者Shen, Ping
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
4.Changan Univ, Coll Earth Sci, Xian 710054, Shaanxi, Peoples R China
5.K Satpaev Inst Geol Sci, Lab Geol Format, Alma Ata 050010, Kazakhstan
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Li, Changhao,Shen, Ping,Pan, Hongdi,et al. Geology and ore-forming fluid evolution of the Aktogai giant porphyry Cu deposit, Kazakhstan[J]. JOURNAL OF ASIAN EARTH SCIENCES,2018,165:192-209.
APA Li, Changhao,Shen, Ping,Pan, Hongdi,Cao, Chong,&Seitmuratova, Eleonora.(2018).Geology and ore-forming fluid evolution of the Aktogai giant porphyry Cu deposit, Kazakhstan.JOURNAL OF ASIAN EARTH SCIENCES,165,192-209.
MLA Li, Changhao,et al."Geology and ore-forming fluid evolution of the Aktogai giant porphyry Cu deposit, Kazakhstan".JOURNAL OF ASIAN EARTH SCIENCES 165(2018):192-209.
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