| 内蒙古东部喀喇沁旗地区金矿围岩蚀变遥感信息提取及成矿预测 |
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| 引用本文： | 施炜,刘建民,王润生.内蒙古东部喀喇沁旗地区金矿围岩蚀变遥感信息提取及成矿预测[J].地球学报,2007,28(3):291-298. |
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| 作者姓名： | 施炜 刘建民 王润生 |
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| 作者单位： | 中国地质科学院地质力学研究所,北京100081;中国地质科学院地质力学研究所,北京100081;中国国土资源航空物探遥感中心,北京100083 |
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| 基金项目： | 内蒙古自治区地质勘查重大科研项目(编号:内地研2004-04) |
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| 摘 要： | 内蒙古东部喀喇沁旗地区位于燕山造山带东段的成矿带之上,金矿资源丰富.本文运用遥感技术,结合野外调查,对这一地区金矿围岩矿化异常信息进行了提取和分析.研究表明,本区现有矿床分布与明显受区域构造控制,区内金矿床围岩蚀变以硅化和含铁矿物为主,粘土矿物蚀变较少.区内主要发育3个成矿带,即南北各存在一个近E-W向的成矿带,喀喇沁旗东南发育一个NE-SW向的成矿带,且明显受断裂控制.成矿有利区主要位于本区东南部,且在本区南部NE-SW向断裂和近EW向断裂交汇地带围岩蚀变信息较强,可能为富矿部位.研究表明围岩蚀变遥感异
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| 关 键 词： | 内蒙古东部 金矿 遥感 蚀变信息提取 成矿预测 |
The Extraction of Wall Rock Alteration Information Related to Gold Deposits in Harqin Banner Area of Eastern Inner Mongolia by Using ETM+ Remote Sensing Technique |
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| SHI Wei,LIU Jian-ming and WANG Run-sheng.The Extraction of Wall Rock Alteration Information Related to Gold Deposits in Harqin Banner Area of Eastern Inner Mongolia by Using ETM+ Remote Sensing Technique[J].Acta Geoscientia Sinica,2007,28(3):291-298. |
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| Authors: | SHI Wei LIU Jian-ming and WANG Run-sheng |
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| Institution: | Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081;Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081;China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083 |
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| Abstract: | Lots of gold deposits exist in Harqin Banner area within the eastern part of Inner Mongolia. Using the ETM+ remote sensing technique combined with field work,the authors extracted and analyzed the wall rock alteration and mineralization information of gold deposits in this area. The results show that the distribution of gold deposits in this area are obviously controlled by regional tectonics, and alterations related to gold mineralization are composed mainly of silicification and ferruginous minerals, with minor clay minerals. Three ore-forming belts are developed in this area, consisting of two EW-trending belts and one NE-SW-trending belt. The favorable area for gold mineralization lies in the southeast of the Harqin Banner area,and rich gold ore bodies might exist in the intersections between EW-trending faults and NE-SW-trending faults, where wall rock alterations are relatively intense. It is shown that the remote sensing information of mineralization and alteration can clearly reveal the potential areas of gold mineralization, and hence has some guiding significance in the exploration of gold deposits. |
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| Keywords: | eastern Inner Mongolia gold deposit remote sensing alteration information extraction ore prognosis |
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