罗卜岭斑岩Cu-Mo矿床成矿流体演化:来自石英阴极发光及LA-ICP-MS微量元素的制约
The evolution of ore-forming fluids of the Luoboling porphyry Cu-Mo deposit:Constraints from cathode luminescence images and LA-ICP-MS trace element analyses of quartzs
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文摘
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罗卜岭大型斑岩Cu-Mo矿床具有166万吨的Cu储量和12万吨的Mo储量,是紫金山Cu-Au-Mo-Ag矿集区内斑岩型矿床的典型代表。矿床成矿过程可划分为成矿前、Mo成矿期、Cu-Mo成矿期和成矿后4个阶段。成矿前和Mo成矿期以发育粗粒亮色(阴极发光,CL)石英为特征,CL图像发光强度均一,Cu-Mo成矿期以发育中-细粒不均一灰色石英为特征,成矿后期则以发育生长环带的暗灰色石英为特征。各阶段石英w(Ti)介于<0.1×10~(-6)~144×10~(-6)之间,与石英CL发光强度呈正相关,总体上由成矿前至成矿后呈现逐渐降低的趋势,暗示流体逐渐降温的过程。Ti温度计计算结果表明,不同期石英结晶温度主体介于189~640 ℃。石英中w(Al)介于32×10~(-6)~3855×10~(-6)之间,在成矿前、主成矿期脉体及成矿后石英-黄铁矿脉中均较稳定(32×10~(-6)~373 ×10~(-6))或局部降低,仅在最晚期含石膏、方解石脉中明显升高。Al含量的变化暗示水岩反应(绢英岩化)消耗了初始流体中的H~+,导致反应后流体pH值相对稳定或局部升高,该过程可能对黄铜矿的饱和沉淀起到了促进作用。除浅部晚阶段石英-黄铁矿脉,石英中Al与Li的行为保持一致,表明Al~(3+)+Li~+在类质同象过程中替换Si~(4+)的现象普遍存在。 |
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其他语种文摘
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The Luoboling large Cu-Mo deposit,with metal resources of 1.66 million tons of Cu and 0.12 million tons of Mo,is a typical representative porphyry deposit in the Zijinshan Cu-Au-Mo-Ag ore concentrated district.Four stages of the hydrothermal mineralization process,including pre-mineralization,Mo-mineralization,Cu-Mo-mineralization,and post-mineralization stages,of the Luoboling deposit have been identified.The quartzs of pre-mineralization and Mo-mineralization stages are characterized by coarse-grained ones with homogeneous bright cathodeluminescence (CL) images,the quartzs of Cu-Mo mineralization stage are characterized by medium to fine-grained ones with inhomogeneous grey CL images,whereas the quartzs of post-mineralization stage are characterized by dark grey CL images of quartzs with growth zones.The Ti contents of quartzs in different stages,ranging from <0.1×10~(-6) to 144×10~(-6),are positively correlated with the CL intensities of quartzs.They are generally decreased from the pre-mineralization to post-mineralization stages,suggesting the gradual cooling process of the evolved ore-forming fluids.Based on the calculation of Ti-in-quartz thermometer,the crystallization temperatures of quartzs of different stages at Luoboling vary mainly from 189℃ to ~ 640℃.The Al concentrations in quartzs vary from 32×10~(-6) to 3855×10~(-6).Especially,quartzs of veins in pre-mineralization,Mo-mineralization,and Cu-Mo-mineralization stages and of quartz-pyrite veins in post-mineralization stage contain Al contents mainly varying from 32×10~(-6) to 373×10~(-6),ore limitedly lower than 32×10~(-6),only the quartzs in gypsum- and calcite-bearing quartz veins of the post-mineralization stage have Al contents obviously higher than373×10~(-6).The variation of Al concentrations in quartzs indicates that the consumption of H~+ in the original fluids by the water-rock interaction (phyllic alteration) resulted in the relative stabilization or the local increase of pH values of the fluids,then could promote the saturation and precipitation of chalcopyrite.Except the shallow-level quartz-pyrite veins in post-mineralization stage,the Al and Li in quartzs have similar geochemical behaviors at Luoboling,revealing that the substitution of Si~(4+) by coupled Al~(3+) and Li~+ in quartz lattice is common in isomorphism. |
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来源
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矿物学报
,2022,42(5):579-589 【核心库】
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DOI
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10.16461/j.cnki.1000-4734.2022.42.057
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关键词
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Cu-Mo矿床
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石英
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阴极发光
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微量元素
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LA-ICP-MS
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成矿流体
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罗卜岭斑岩
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地址
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1.
昆明理工大学国土资源工程学院, 云南, 昆明, 650093
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中国科学院地球化学研究所, 矿床地球化学国家重点实验室, 贵州, 贵阳, 550081
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-4734 |
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学科
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地质学 |
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基金
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国家自然科学基金项目
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云南省基础研究专项项目
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昆明理工大学人培基金项目
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国家重点研发计划项目
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文献收藏号
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CSCD:7267030
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参考文献 共
37
共2页
|
|
1.
张德全. 紫金山地区的斑岩—浅成热液成矿系统.
地质学报,2003,77(2):253-261
|
被引
67
次
|
|
|
|
|
2.
张德全. 紫金山地区斑岩-浅成热液成矿系统的成矿流体演化.
地球学报,2005,26:127-136
|
被引
65
次
|
|
|
|
|
3.
钟军. 福建省紫金山矿田罗卜岭斑岩型铜钼矿床流体包裹体研究.
岩石学报,2011,27(5):1410-1424
|
被引
45
次
|
|
|
|
|
4.
Zhong J. Geology, geochronology, fluid inclusion and H-O isotope geochemistry of the Luoboling Porphyry Cu-Mo deposit, Zijinshan Orefield, Fujian Province, China.
Ore Geology Reviews,2014,57:61-77
|
被引
38
次
|
|
|
|
|
5.
So C S. Alteration-mineralization zoning and fluid inclusions of the high sulfidation epithermal Cu-Au mineralization at Zijinshan, Fujian Province, China.
Economic Geology,1998,93(7):961-980
|
被引
23
次
|
|
|
|
|
6.
张德全. 福建紫金山矿床——我国大陆首例石英-明矾石型浅成低温热液铜-金矿床.
地质论评,1991,6:481-491
|
被引
1
次
|
|
|
|
|
7.
Zhong J. Geology, fluid inclusion and stable isotope study of the Yueyang Ag-Au-Cu deposit, Zijinshan orefield, Fujian Province, China.
Ore Geology Reviews,2017,86:254-270
|
被引
5
次
|
|
|
|
|
8.
陈静. 福建省紫金山矿田五子骑龙铜矿床流体包裹体研究.
岩石学报,2011,27:175-188
|
被引
1
次
|
|
|
|
|
9.
薛凯. 福建紫金山矿田五子骑龙铜矿床矿化与蚀变分带研究.
大地构造与成矿学,2013,37(3):463-470
|
被引
7
次
|
|
|
|
|
10.
梁清玲. 福建紫金山矿田罗卜岭斑岩型铜钼矿床辉钼矿Re-Os定年及地质意义.
地质学报,2012,86(7):1113-1118
|
被引
25
次
|
|
|
|
|
11.
Li B. Genesis of the giant Zijinshan epithermal Cu-Au and Luoboling porphyry Cu-Mo deposits in the Zijinshan ore district, Fujian Province, SE China: A multi-isotope and trace element investigation.
Ore Geology Reviews,2017,88:753-767
|
被引
7
次
|
|
|
|
|
12.
Marshall D J.
Cathodoluminescence of geological materials,1988
|
被引
3
次
|
|
|
|
|
13.
Gotze J. A comparison of optical microscope-and scanning electron microscope-based cathodoluminescence (CL) imaging and spectroscopy applied to geosciences.
Mineralogical Magazine,2008,72(4):909-924
|
被引
6
次
|
|
|
|
|
14.
Rusk B G. Intensity of quartz cathodoluminescence and trace-element content in quartz from the porphyry copper deposit at Butte, Montana.
American Mineralogist,2015,91(8/9):1300-1312
|
被引
21
次
|
|
|
|
|
15.
Rusk B G. Trace elements in hydrothermal quartz: Relationships to cathodoluminescent textures and insights into vein formation.
Geology,2008,36(7):547-550
|
被引
32
次
|
|
|
|
|
16.
Gotze J. Chemistry, textures and physical properties of quartz-geological interpretation and technical application.
Mineralogical Magazine,2009,73(4):645-671
|
被引
23
次
|
|
|
|
|
17.
Wark D A. TitaniQ: a titanium-in-quartz geothermometer.
Contributions to Mineralogy and Petrology,2006,152(6):743-754
|
被引
47
次
|
|
|
|
|
18.
Thomas J B. TitaniQ under pressure: the effect of pressure and temperature on the solubility of Ti in quartz.
Contributions to Mineralogy and Petrology,2010,160(5):743-759
|
被引
20
次
|
|
|
|
|
19.
Huang R. The titanium-in-quartz (TitaniQ) thermobarometer: A critical examination and re-calibration.
Geochimica et Cosmochimica Acta,2012,84:75-89
|
被引
6
次
|
|
|
|
|
20.
Muller A. Trace elements and cathodoluminescence of quartz in stockwork veins of Mongolian porphyry-style deposits.
Mineralium Deposita,2010,45(7):707-727
|
被引
8
次
|
|
|
|
|
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