| 西安河金矿床特征及找矿前景分析 |
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| 引用本文： | 陈永彬,刘伟,李锁成.西安河金矿床特征及找矿前景分析[J].甘肃地质学报,2002,11(2):45-53. |
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| 作者姓名： | 陈永彬 刘伟 李锁成 |
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| 作者单位： | 甘肃省地勘局第一地勘院 甘肃天水741020
(陈永彬，刘伟)，甘肃省地勘局第一地勘院 甘肃天水741020(李锁成) |
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| 摘 要： | 西安河构造 (热液 )蚀变岩型金矿床 ,产于丹凤群及大草滩组发育的近EW向断裂破碎带内。矿床规模已达中型。矿石以低品位构造蚀变岩型为主 ,褐铁矿、黄铁矿是主要的载金矿物。围岩蚀变以硅化、褐铁矿化、黄铁矿化、绢云母化为特征。中基性火山岩、韧脆性断裂构造、中酸性岩浆侵入“三位一体”是控制矿床形成的基本条件。区内成矿条件优越 ,具有形成大型金矿的可能性 ,近EW向断裂蚀变延伸带是寻找金矿的有利地段。
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| 关 键 词： | 西安河 金矿床 地质特征 找矿前景 |
SIGNATURE AND PREREQUISITE FOR ORE HUNTING OF XI'ANHE GOLD ORE DEPOSIT |
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| CHEN Yong bin,LIU Wei and LI Suo cheng.SIGNATURE AND PREREQUISITE FOR ORE HUNTING OF XI''ANHE GOLD ORE DEPOSIT[J].Acta Geologica Gansu,2002,11(2):45-53. |
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| Authors: | CHEN Yong bin LIU Wei and LI Suo cheng |
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| Institution: | (No.1 Institute of Geology and Mineral Exploration,Gansu Provincial Bureau of Geology and Mineral Exploration and Development,Tianshui 741020,China) |
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| Abstract: | Xi'anhe structural (hydrothermal slution) altered gold ore deposit, it occured in a faulted-fracture zone that developed in Danfeng group and Dacaotan Formation,strike nearly EW. It's a mid scale and its ore belongs to low grade structural altereds tyle,limonite,pyrite are mainly gold carriers. Wall rock alteration are mainly silicatization,limonitization,pyritization and sericitization. Mesobasic volcanic rock,tenacity brittle fault structure and meso-acidic magma intrusion were consisted of a basic condition for ore forming.In this region,metallogenic condition very good and may be large scale gold ore deposit in this region, and the near EW faulted altered belt is a favorable section for hunting gold ore deposit. |
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| Keywords: | Xi'anhe Gold ore deposit Geologic signature Prerequisite for hunting ore |
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