Genesis of the Fuxing porphyry Cu deposit in Eastern Tianshan, China: Evidence from fluid inclusions and C–H–O–S–Pb isotope systematics
Genesis of the Fuxing porphyry Cu deposit in Eastern Tianshan, China: Evidence from fluid inclusions and C–H–O–S–Pb isotope systematics
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中国东天山复兴斑岩铜矿床成因：来自流体包裹体和C-H-O-S-Pb同位素系统学的证据
DOI：
10.1016/j.oregeorev.2016.04.022
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发表时间：
2016-12
影响因子：
3.3
通讯作者：
Chaoyang Que
中科院分区：
文献类型：
--
作者：
Yinhong Wang;Fangfang Zhang;Jiajun Liu;Chaoyang Que
复兴斑岩铜存款矿床是新疆东天山地区新发现的存款矿床。铜矿化与富兴斜长花岗斑岩和二长花岗岩共生，主要表现为围岩中的各种热液脉或细脉，发育钾质、钾长石、千枚石和青玉蚀变。成矿过程可分为四个阶段：Ⅰ期石英脉型、Ⅱ期石英-黄铜矿-黄铁矿脉型、Ⅲ期石英-多金属硫化物脉型和Ⅳ期石英-方解石脉型。复兴存款中可区分出四种类型的流体包裹体（FI），包括超斜（H型）、富汽两相（V型）、富液两相（L型）和微量纯蒸汽包裹体（P型），但只有第一阶段石英包含所有类型的FI。第二和第三阶段的石英有两种类型的FI，除了H型和P型。在第IV阶段石英矿物中，只能观察到L型包裹体。阶段I、II、III和IV的石英中的FI主要在357-518 °C、255-393 °C、234-322 °C和145-240 °C的温度下均质化，盐度为1.9- 11.6wt.% NaCl当量，1.6-9.6重量% NaCl当量，1.4-7.7重量% NaCl当量和0.9-3.7重量% NaCl当量，分别富兴存款矿床成矿流体具有高温、中等盐度、相对氧化的特点。石英碳、氢、氧同位素组成表明成矿流体由岩浆来源逐渐演化为大气降水来源。硫、铅同位素表明成矿物质来源于深源岩浆。富兴存款矿床的成矿作用发生在~ 1 km的深度，氧逸度的变化、减压沸腾以及与大气降水的局部混合可能是富兴铜存款矿床形成的关键。
The Fuxing porphyry Cu deposit is a recently discovered deposit in Eastern Tianshan, Xinjiang, northwestern China. The Cu mineralization is associated with the Fuxing plagiogranite porphyry and monzogranite, mainly presenting as various types of hydrothermal veins or veinlets in alerted wall rocks, with potassic, chlorite, phyllic, and propylitic alteration developed. The ore-forming process can be divided into four stages: stage I barren quartz veins, stage II quartz–chalcopyrite–pyrite veins, stage III quartz–polymetallic sulfide veins and stage IV quartz–calcite veins. Four types of fluid inclusions (FIs) can be distinguished in the Fuxing deposit, including hypersline (H-type), vapor-rich two-phase (V-type), liquid-rich two-phase (L-type), and trace amounts of pure vapor inclusions (P-type), but only the stage I quartz contains all types of FIs. The stages II and III quartz have two types of FIs, with exception of H- and P-types. In stage IV quartz minerals, only the L-type inclusions can be observed. The FIs in quartz of stages I, II, III and IV are mainly homogenized at temperatures of 357–518 °C, 255–393 °C, 234–322 °C and 145–240 °C, with salinities of 1.9–11.6 wt.% NaCl equiv., 1.6–9.6 wt.% NaCl equiv., 1.4–7.7 wt.% NaCl equiv. and 0.9–3.7 wt.% NaCl equiv., respectively. The ore-forming fluids of the Fuxing deposit are characterized by high temperature, moderate salinity and relatively oxidized condition. Carbon, hydrogen and oxygen isotopic compositions of quartz indicate that the ore-forming fluids were gradually evolved from magmatic to meteoric in origin. Sulfur and lead isotopes suggest that the ore-forming materials were derived from a deep-seated magma source. The Cu mineralization in the Fuxing deposit occurred at a depth of ~ 1 km, and the changes of oxygen fugacity, decompression boiling, and local mixing with meteoric water were most likely critical for the formation of the Fuxing Cu deposit.
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DOI：
10.1007/978-3-319-78527-1
发表时间：
1973
期刊：
Stable Isotope Geochemistry
影响因子：
--
作者：
J. Hoefs
通讯作者：
J. Hoefs
东天山白山斑岩钼矿床流体包裹体及H-O-S-Pb同位素系统
影响因子：
3.3
作者：
Fangfang Zhang;Yinhong Wang;Jiajun Liu
通讯作者：
Jiajun Liu
影响因子：
5
作者：
P. Lecumberri-Sanchez;M. Steele‐MacInnis;R. Bodnar
通讯作者：
P. Lecumberri-Sanchez;M. Steele‐MacInnis;R. Bodnar
影响因子：
2.9
作者：
R. Zartman;B. Doe
通讯作者：
R. Zartman;B. Doe
影响因子：
3.5
作者：
Taofa Zhou;F. Yuan;Yu Fan;Dayu Zhang;D. Cooke;Guochun Zhao
通讯作者：
Taofa Zhou;F. Yuan;Yu Fan;Dayu Zhang;D. Cooke;Guochun Zhao