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现代地质 ›› 2017, Vol. 31 ›› Issue (06): 1284-1293.

• 遥感地质学 • 上一篇    下一篇

高分辨率遥感在西藏罗布莎地区地质调查中的应用

杨伟光1(), 郑有业1,2(), 刘婷1, 王朋冲1, 王成松3, 冯泉霖4, 郭统军1   

  1. 1.中国地质大学(北京) 地球科学与资源学院,北京 100083
    2.中国地质大学 地质过程与矿产资源国家重点实验室,北京 100083
    3.西藏自治区地质矿产勘查开发局 第二地质大队,西藏 拉萨 850000
    4.山东省地矿工程勘察院,山东 济南 250014
  • 收稿日期:2017-05-31 修回日期:2017-09-02 出版日期:2017-12-10 发布日期:2017-12-25
  • 通讯作者: 郑有业,男,教授,博士生导师,长江学者,1962年出生,矿产普查与勘探专业,主要从事基础地质、成矿规律及矿产勘查评价工作。Email:zhyouye@163.com
  • 作者简介:杨伟光,男,硕士研究生,1993年出生,矿物学、岩石学、矿床学专业,主要从事遥感技术在地质调查方面的研究。Email:Yangwg_cugb@126.com
  • 基金资助:
    中国地质调查局发展研究中心项目(121201004000150017-101)

The Application of High Spatial Resolution Data to Remote Sensing Geological Survey in the Luobusa Area, Tibet

YANG Weiguang1(), ZHENG Youye1,2(), LIU Ting1, WANG Pengchong1, WANG Chengsong3, FENG Quanlin4, GUO Tongjun1   

  1. 1. School of Earth Sciences and Resources, China University of Geosciences,Beijing 100083,China
    2. State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Beijing 100083,China
    3. No.2 Geological Team,Tibet Autonomous Region Geological and Mineral Exploration and Development Bureau,Lhasa,Tibet 850000,China
    4. Shandong Provincial Geo-mineral Engineering Exploration Institute, Jinan,Shandong 250014,China
  • Received:2017-05-31 Revised:2017-09-02 Online:2017-12-10 Published:2017-12-25

摘要:

研究区位于西藏罗布莎地区,其罗布莎蛇绿岩体蕴藏着我国目前规模最大的铬铁矿床。以WorldView-2高空间分辨率遥感数据为基本信息源,对研究区进行遥感地质解译。与传统多光谱数据ETM+、ASTER等相比,WorldView-2具有更高的空间分辨率和相对较窄且连续的光谱。对研究区WorldView-2图像进行正射校正、大气校正和影像融合后,采用最佳指数法选择8-6-4波段组合进行假彩色合成,同时结合真彩色5-3-2波段,突出各地质体单元色调差异。我们利用其空间分辨率优势建立区内主要岩性和构造的高空间分辨率遥感解译标志。通过野外地质验证,解译结果充分显示了WorldView-2高分辨率影像在海拔较高、工作环境恶劣地区进行矿产资源勘查的技术优势和应用前景。

关键词: 高分辨率, WorldView-2, 遥感地质解译, 野外验证, 罗布莎, 西藏

Abstract:

The study area is located in Luobusa region, Tibet. The Luobusa ophiolite contains the largest known chromitite deposits in China. The purpose of this paper is to carry on the geological interpretation of remote sensing images based on WorldView-2 high spatial resolution remotely sensed data. As compared with the more frequently used ETM+ and ASTER image, WorldView-2 sensor can provide much higher spatial resolution and spectral resolution in relative narrow spectral range. Ortho rectification, atmosphere correct and image fusion are applied to WorldView-2 image of the study area, and then according to the optimum index factor band combination 8-6-4 is selected to achieve false color composite and combining with true color band 5-3-2 so as to highlight the tone difference of different lithological units. At last, we take advantage of WorldView-2 high spatial resolution remotely sensed data to establish the remote sensing interpretation signs of main lithology units and structure. Thus, based on remote sensing image processing, geological interpretation and field investigation in this area, we can conclude that WorldView-2 high spatial resolution remote sensing images have the technical advantage and application prospect in geological resource exploration in those regions with high altitude and poor working conditions.

Key words: high spatial resolution, WorldView-2, remote sensing geological interpretation, field investigation, Luobusa, Tibet

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