| 朱江建.构造叠加晕在广东河台金矿的应用[J].地质与勘探,2014,50(6):1109-1117 |
| 构造叠加晕在广东河台金矿的应用 |
| Application of the structural superimposed halos method in the Hetai gold deposit |
| 投稿时间：2014-03-13 修订日期：2014-05-20 |
| DOI： |
| 中文关键词: 伽马能谱 河台金矿 糜棱岩 K异常 |
| 英文关键词: Gamma-ray spectrometric survey, Hetai gold deposit, mylonite, anomalous values of K |
| 基金项目:矿山典型矿床成矿规律总结研究（编号：121200113086300）和国家自然科学基金项目：广东河台金矿富矿包中金的超常富集机制研究（编号：41172082）资助 |
|
| 摘要点击次数: 2165 |
| 全文下载次数: 1450 |
| 中文摘要: |
| 河台金矿是一个典型的与韧性剪切带有关的金矿床，也是目前粤西、桂东南已发现的最大的金矿床。为了给深边部的找矿提供科学依据，本文对河台金矿伽马能谱K异常进行了研究。河台金矿动力变质分异期、热液期与表生期生成的富钾矿物只有绢云母，表明本区引起伽马能谱K高异常的应为绢云母。这些绢云母可能成因于糜棱岩化过程与金-黄铁矿-石英热液蚀变过程中斜长石的绢云母化。其中，糜棱岩化过程引起的K高异常具有异常宽度小的特点，且具有指示糜棱岩带与矿体位置的意义。金-黄铁矿-石英阶段引起的K高异常具有异常宽度大的特点，且主要发育于糜棱带与不同岩性的接触带。伽马能谱K低异常则可能成因于热液成矿期中金-石英-多金属硫化物阶段的热液蚀变作用及低钾花岗伟晶岩脉的侵入。 |
| 英文摘要: |
| The Hetai gold deposit is the largest gold deposit in western Guangdong and southeastern Guangxi，which is related to a ductile shear zone．In order to find scientific basis for prospecting, this paper studied the anomalous values of K from Gamma-ray spectrometric survey in this deposit. The K- bearing mineral which was generated in the dynamic metamorphic differentiation period, hydrothermal stage and supergene stage in the deposit is only sericite, suggesting that high values of K from Gamma-ray spectrometric survey should be caused by sericite. The increase of sericite should be caused by sericitization from plagioclase in the process of mylonitization and the alteration of gold-pyrite-quartz-bearing hydrothermal fluid. The high value belts of K produced in the process of mylonitization are narrow, and can indicate the location of mylonites and orebodies. The high value belts of K caused by gold-pyrite-quartz bearing hydrothermal fluid are wide, and can indicate the location of mylonites and the contact zones of different rocks. Low values of K may be attributed to the alteration of gold-quartz- sulfide-bearing hydrothermal fluid and invasion of granitic pegmatite. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
