新疆阿吾拉勒地区查岗诺尔铁矿床铜矿化的成因探讨
Study on the Cu-mineralization of the Chagangnuoer Fe-deposit in the Awulale area,Xinjiang
查看参考文献38篇
文摘
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与西天山阿吾拉勒石炭纪火山活动有关的铁矿床普遍发育含铜的方解石脉,在局部地段构成伴生或独立铜矿体.钻孔揭露显示,查岗诺尔铁矿体内含铜方解石脉穿插在磁铁矿、石榴石、阳起石和绿帘石中,其形成明显晚于铁矿化.流体包裹体研究显示,查岗诺尔铁矿床后期铜矿化的成矿流体应为CO_2-CaCl_2-NaCl-H_2O体系的超临界流体.这种富含CO_2的超临界流体不但具有较强的渗透性,而且对铜等成矿元素具有较高的溶解度,可以携带巨量成矿元素进行长距离迁移.由于体系的温度及CO_2和H2S等挥发分含量降低,铜等成矿元素在流体中的溶解度明显下降并沉淀成矿.碳、氧位素分析结果显示,查岗尔铁矿床晚期铜矿化与区内早二叠世的钾质-超钾质岩浆活动有关. |
其他语种文摘
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The Cu-bearing calcite veins,usually in association with the accessory or independent Cu mineralization,were widespread in Fe-deposits associated with Carbonaceous volcanics in the Awulale Mountains,western Tianshan.The drillings show that the calcite veins occurred significantly later than the Fe-mineralization,with cutting across the magnetite,garnet,actinolite and epidote.This study investigated the fluid inclusions forming after the Fe-mineralization in the Chagangnuoer deposit.The results suggest that the Cu-mineralization fluid was a supercritical fluid of CO_2-CaCl_2-NaCl-H_2O,Such CO_2-rich fluid was of high permeability and solubility in Cu,and of high ability to transfer abundant ore-forming elements over a long distance.As the temperature down to 280 ℃~240 ℃,the fluid would change into sault solution.The solubility would drop and the ore-forming elements would precipitate,since the decrease of temperature and violates of CO_2 and H2S.C-O isotopes indicate that the Cu-mineralization related fluids of the Chagangnuoer Fe deposit were derived from the Permian potassic and shoshonitic magmatisims. |
来源
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南京大学学报. 自然科学版
,2012,48(3):256-265 【核心库】
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关键词
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查岗诺尔铁矿床
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铜矿化
;
流体包裹体
;
碳、氧同位素
;
超临界流体
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地址
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1.
中国科学院广州地球化学研究所, 广州, 510640
2.
南阳师范学院环境科学与旅游学院, 南阳, 473061
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语种
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中文 |
ISSN
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0469-5097 |
学科
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地质学 |
基金
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国家自然科学基金
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文献收藏号
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CSCD:4579553
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参考文献 共
38
共2页
|
1.
冯金星.
西天山阿吾拉勒成矿带火山岩型铁矿,2010:56-92
|
被引
4
次
|
|
|
|
2.
单强. 新疆尼勒克县松湖铁矿床黄铁矿的特征和微量元素地球化学.
岩石学报,2009,25:1456-1464
|
被引
33
次
|
|
|
|
3.
卢焕章.
流体包裹体,2004:172-228
|
被引
12
次
|
|
|
|
4.
Coplen T B. Comparison of stable isotope reference samples.
Nature,1983,302:236-238
|
被引
77
次
|
|
|
|
5.
郑永飞.
稳定同位素地球化学,2000:155-208
|
被引
9
次
|
|
|
|
6.
Williams-Jones A E. Vapor transport of metals and the formation of magmatic-hydrothermal ore deposits.
Economic Geology,2005,100:1287-1312
|
被引
78
次
|
|
|
|
7.
Lai J Q. CO_2-rich fluid inclusions with chalcopyrite daughter mineral from the Fenghuangshan Cu-Fe-Au deposit,China: implications for metal transport in vapor.
Mineralium Deposita,2007,42:293-299
|
被引
9
次
|
|
|
|
8.
Henley R W. Magmatic vapor plumes and groundwater interaction in porphyry copper emplacement.
Economic Geology,1978,73:1-20
|
被引
34
次
|
|
|
|
9.
Heinrich C A. Segregation of ore metals between magmatic brine and vapor-a fluid inclusion study using PIXE microanalysis.
Econimic Geology,1992,87:1566-1583
|
被引
56
次
|
|
|
|
10.
Damman A H. PIXE and SEM analyses of fluid inclusions in quartz crystals from the K-alteration zone of the Rosia Poieni porphyry-Cu deposit, Apuseni mountains,Rumania.
European Journal of Mineralogy,1996,8:1081-1096
|
被引
3
次
|
|
|
|
11.
Heinrich C A. Metal fractionation between magmatic brine and vapor,determined by microanalysis of fluid inclusions.
Geology,1999,27:755-758
|
被引
95
次
|
|
|
|
12.
Ulrich T. Gold concentrations of magmatic brines and the metal budget of porphyry copper deposits.
Nature,1999,399:676-679
|
被引
125
次
|
|
|
|
13.
Baker T. Composition and evolution of ore fluids in a magmatic-hydrothermal skarn deposit.
Geology,2004,32:117-120
|
被引
65
次
|
|
|
|
14.
Zajacz Z. Copper transport by high temperature,sulfur-rich magmatic vapor:Evidence from silicate melt and vapor inclusions in a basaltic andesite from the Villarrica volcano(Chile).
Earth and Planetary Science Letters,2009,282:115-121
|
被引
17
次
|
|
|
|
15.
Kim J. Metal-bearing molten sulfur collected from a submarine volcano: Implications for vapor transport of metals in seafloor hydrothermal systems.
Geology,2011,39:351-354
|
被引
2
次
|
|
|
|
16.
Yang K H. Possible contribution of a metal-rich magmatic fluid to a sea-floor hydrothermal system.
Nature,1996,383:420-423
|
被引
42
次
|
|
|
|
17.
Schmidt M A. High CO_2 content of fluid inclusions in gold mineralizations in the Ashanti Belt,Ghana:A new category of ore forming fluids?.
Mineralium Deposita,1997,32:107-118
|
被引
5
次
|
|
|
|
18.
Hanley J J. Ore metal redistribution by hydrocarbon-brine and hydrocarbonhalide melt phases,North Range footwall of the Sudbury igneous complex,Ontario, Canada.
Mineralium Deposita,2005,40:237-256
|
被引
4
次
|
|
|
|
19.
Chi G. Carbonic vapor-dominated fluid systems in orogenic-type Au deposits.
Geochimica et Cosmochimica Acta,2005,69:A738
|
被引
1
次
|
|
|
|
20.
Chi G. Formation of the Campbell-Red Lake gold deposit by H_2O-poor,CO_2-dominated fluids.
Mineralium Deposita,2006,40:726-741
|
被引
9
次
|
|
|
|
|