| 内蒙古朝不楞铁铜锌铋矿床的地质特征及矿床成因 |
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| 引用本文： | 王必任,周志广,李树才,柳长峰,周毅,冯俊岭.内蒙古朝不楞铁铜锌铋矿床的地质特征及矿床成因[J].矿床地质,2014,33(2):373-385. |
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| 作者姓名： | 王必任 周志广 李树才 柳长峰 周毅 冯俊岭 |
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| 作者单位： | 国土资源实物地质资料中心, 河北 燕郊 065201;中国地质大学, 北京 100083;国土资源实物地质资料中心, 河北 燕郊 065201;中国地质大学, 北京 100083;国土资源实物地质资料中心, 河北 燕郊 065201;国土资源实物地质资料中心, 河北 燕郊 065201 |
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| 基金项目： | 本文得到中国地质调查局地质调查项目“华北地区基础地质调查及数据更新”（批准号：121201811001；1212010510506）的资助 |
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| 摘 要： | 内蒙古朝不楞铁铜锌铋矿床位于二连浩特-东乌旗多金属成矿带的东段，其矿化蚀变沿着花岗岩体与围岩的接触带分布。在外接触带，大理岩热液蚀变形成了进化矽卡岩，由石榴子石、辉石、硅灰石和方解石组成，泥质砂岩蚀变成角岩，由角闪石、黑云母、长石和石英组成。矽卡岩或角岩经退化蚀变形成了铁氧化物矿化，由磁铁矿、磁赤铁矿和镜铁矿组成，伴随有绿帘石、方解石、萤石和黑云母蚀变；晚期热液退化蚀变形成了硫化物，由黄铜矿、白铁矿、黄铁矿、辉钼矿、闪锌矿、辉铋矿和自然铋组成，伴随有透闪石、绿泥石、萤石、石英和方解石蚀变。在内接触带，花岗岩的热液蚀变形成了钾化，由钾长石、黑云母和少量石榴子石组成，随后被退化绿帘石、方解石和少量磁铁矿交代；晚期退化蚀变形成了硫化物脉，伴随有黑云母、方解石、石英和萤石蚀变。流体包裹体爆裂温度结果表明，该矿床形成于浅成（1.7~3.5 km）、高温环境，成矿热液具有从高温向低温多阶段演化的冷却史。矿床的地质、矿物组合特征及成矿物理化学条件显示出该矿床属于浅成、高温、近端的矽卡岩型矿床。
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| 关 键 词： | 地质学 矽卡岩 朝不楞铁铜锌铋矿床 内蒙古 |
| 收稿时间： | 2011/12/8 0:00:00 |
| 修稿时间： | 2013/12/27 0:00:00 |
Geological characteristics and ore genesis of Chaobuleng Fe-Cu-Zn-Bi deposit in Inner Mongolia |
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| WANG BiRen,ZHOU ZhiGuang,LI ShuCai,LIU ChangFeng,ZHOU Yi and FENG JunLing.Geological characteristics and ore genesis of Chaobuleng Fe-Cu-Zn-Bi deposit in Inner Mongolia[J].Mineral Deposits,2014,33(2):373-385. |
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| Authors: | WANG BiRen ZHOU ZhiGuang LI ShuCai LIU ChangFeng ZHOU Yi and FENG JunLing |
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| Institution: | Cores and Samples Center of Land and Resources, CGS, Yanjiao 065201, Hebei, China;China University of Geosciences, Beijing 100083, China;Cores and Samples Center of Land and Resources, CGS, Yanjiao 065201, Hebei, China;China University of Geosciences, Beijing 100083, China;Cores and Samples Center of Land and Resources, CGS, Yanjiao 065201, Hebei, China;Cores and Samples Center of Land and Resources, CGS, Yanjiao 065201, Hebei, China |
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| Abstract: | The Chaobuleng Fe-Cu-Zn-Bi deposit is located in the eastern part of the Erlianhot-Dong Ujimqin Banner metallogenic belt of Inner Mongolia. Mineralization and alteration occur along the contact zone between the granite and the wall rock. Near the intrusion, prograde skarn, with an assemblage of garnet, pyroxene, wollastonite and calcite, was developed in marble or hornfels that consisted of hornblende, biotite, plagioclase and quartz and occurred in mud-sandstone by the fluid metasomatism. Subsequently, retrograde alteration of skarn or hornfels formed Fe-oxide mineralization, consisting of magnetite, maghemite and specularite and accompanied by the epidote, calcite, fluorite and biotite alteration. An extensive sulfide mineralization occurred during the last retrograde alteration, with an assemblage of chalcopyrite, pyrite, marcasite, sphalerite, molybdenite, bismuthinite and bismuth, accompanied by the tremolite, chlorite, fluorite, quartz and calcite alteration. At the edge of the pluton, potassic veins consisting of K-feldspar, biotite and minor garnet were formed by metasomatism of granite,and a retrograde alteration comprising the epidote, calcite and magnetite assemblage was formed. Subsequent sulfide veins, with a biotite and calcite halo, occurred and was superimposed upon the former alteration. The P-T condition indicates that this deposit was formed under the condition of considerable depth (1.7~3.5 km) and high temperature with a complex hydrothermal-cooling process. The geology, paragenesis and P-T conditions suggest that this deposit belongs to a shallow, proximal skarn deposit. |
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| Keywords: | geology skarn Chaobuleng Fe-Cu-Zn-Bi deposit Inner Mongolia |
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