Fluid inclusions and H–O–S–Pb isotope systematics of the Baishan porphyry Mo deposit in Eastern Tianshan, China
Fluid inclusions and H–O–S–Pb isotope systematics of the Baishan porphyry Mo deposit in Eastern Tianshan, China
复制标题
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
DOI：
10.1016/j.oregeorev.2016.04.015
复制
发表时间：
2016-10
影响因子：
3.3
通讯作者：
Jiajun Liu
中科院分区：
文献类型：
--
作者：
Fangfang Zhang;Yinhong Wang;Jiajun Liu
白山斑岩钼矿床形成于新疆中国西北部东天山中三叠世。钼矿化与白山二长花岗岩和花岗斑岩群有关，主要以各种类型的热液细脉形式出现在警戒围岩中，并伴有钾质、千粒状、早熟石化和萤石蚀变。成矿过程可分为四个阶段：第I阶段钾长石石英-黄铁矿细脉、第II阶段石英-辉钼矿脉、第III阶段石英-多金属硫化物细脉、第IV阶段贫石英-方解石脉体。白山矿床中流体包裹体有4种类型，即富液两相(L型)、富气两相(V型)、固相多相(S型)和单相气相(M型)包裹体，但只有第I期石英包含所有类型的流体包裹体。II和III期石英有三种类型的FIS，但M型除外。在第四期石英矿物中，只能观察到L型包裹体。第一阶段、第二阶段、第三阶段和第四阶段石英中的氟主要在271-468℃、239-349℃、201-331℃和134-201℃温度下均一，盐度分别为2.2-11.6%氯化钠当量、1.1-10.2%氯化钠当量、0.5-8.9%氯化钠当量。和0.2-5.7%的氯化钠当量。白山矿床成矿流体具有高温、中等盐度、相对还原条件等特点，属H2O-NaCl3±1CH4±1CO2体系。石英的氢、氧同位素组成表明，成矿流体在成因上由岩浆演化为大气降水。硫和铅同位素表明，成矿物质主要来自下陆壳的深部岩浆来源。据估计，白山钼矿床的成矿深度不小于4.7千米，成矿流体的温度下降和氧化还原条件(由碱性向酸性)的显著转变是白山钼矿床形成的关键。
The Baishan porphyry Mo deposit formed in the Middle Triassic in Eastern Tianshan, Xinjiang, northwestern China. Mo mineralization is associated with the Baishan monzogranite and granite porphyry stocks, mainly presenting as various types of hydrothermal veinlets in alerted wall rocks, with potassic, phyllic, propylitic, and fluorite alteration. The ore-forming process can be divided into four stages: stage I K-feldspar–quartz–pyrite veinlets, stage II quartz–molybdenite ± pyrite veinlets, stage III quartz–polymetallic sulfide veinlets and stage IV barren quartz–calcite veins. Four types of fluid inclusions (FIs) can be distinguished in the Baishan deposit, namely, liquid-rich two-phase (L-type), vapor-rich two-phase (V-type), solid-bearing multi-phase (S-type) and mono-phase vapor (M-type) inclusions, but only the stage I quartz contains all types of FIs. The stages II and III quartz have three types of FIs, with exception of M-type. 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 271–468 °C, 239–349 °C, 201–331 °C and 134–201 °C, with salinities of 2.2–11.6 wt.% NaCl equiv., 1.1–10.2 wt.% NaCl equiv., 0.5–8.9 wt.% NaCl equiv. and 0.2–5.7 wt.% NaCl equiv., respectively. The ore-forming fluids of the Baishan deposit are characterized by high temperature, moderate salinity and relatively reduced condition, belonging to a H2O–NaCl ± CH4± CO2system. 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 came predominantly from a deep-seated magma source from the lower continental crust. The Mo mineralization in the Baishan deposit is estimated to have occurred at a depth of no less than 4.7 km, and the decrease in temperature and remarkable transition of the redox condition (from alkalinity to acidity) of ore-forming fluids were critical for the formation of the Baishan Mo 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
华中大别造山带沙坪沟巨型斑岩钼矿床形成过程中两阶段流体沸腾的流体包裹体证据
影响因子：
3.3
作者：
Ni Pei;Wang Guo-Guang;Yu Wen;Chen Hui;Jiang Lai-Li;Wang Bo-Hua;Zhang Huai-Dong;Xu Ying-Feng
通讯作者：
Xu Ying-Feng
影响因子：
4.8
作者：
Yang Ze
通讯作者：
Yang Ze
影响因子：
2.9
作者：
R. Zartman;B. Doe
通讯作者：
R. Zartman;B. Doe
影响因子：
4.8
作者：
Yin‐Hong Wang;C. Xue;Jiajun Liu;Fangfang Zhang
通讯作者：
Yin‐Hong Wang;C. Xue;Jiajun Liu;Fangfang Zhang