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标题

多源数据在西藏多龙矿集区找矿实践中的应用

作者

刘雷震 佛军 武建军 杨建民 耿新霞

机构

北京师范大学减灾与应急管理研究院; 地表过程与资源生态国家重点实验室; 中国地质科学院矿产资源研究所; 国土资源部成矿作用与资源评价重点实验室

摘要

多龙矿集区地处藏北高原无人区,环境恶劣,特别需要遥感高新技术的支持,但以往遥感工作仅仅利用遥感数据本身进行信息提取,其结果可靠性低,多解性高,为了提高可靠性,降低多解性,本文首先利用ASD光谱仪对多龙矿集区蚀变岩石进行波谱测试和分析,并以此为基础利用ASTER数据提取了多龙矿集区的遥感蚀变信息;其次,选用ETM+数据对该区进行了地质解译,最后,把地球化学数据和遥感蚀变信息、遥感地质解译信息进行综合圈定了找矿靶区。通过多源数据综合研究认为:(1)遥感蚀变信息整体呈近东西向和南北向分布,与主构造方向一致,且多龙矿集区的形成与断层发育密切相关;(2)通过Cu元素地球化学异常和遥感蚀变信息、地质解译信息综合圈定的找矿靶区,经过野外实践验证表明具有良好的找矿效果。因此,以岩矿波谱测试为基础,综合遥感蚀变信息、地质解译信息和地球化学等多源数据的找矿方法具有快速、经济、高效的效果,尤其在西藏这种气候恶劣、生态背景脆弱的地区拥有更为广阔的应用前景。

关键词

西藏; ETM+; ASTER; 波谱测试; 地球化学数据; 找矿

引用

刘雷震, 佛军, 武建军, 杨建民, 耿新霞. 多源数据在西藏多龙矿集区找矿实践中的应用.[J]. 北京师范大学学报(自然科学版),2016,52(2):184-188.

基金

国家自然科学基金资助项目(41102205); 中央级科研院所基本业务费联合基金资助项目(K1208,K1213)

分类号

P627

DOI

10.16360/j.cnki.jbnuns.2016.02.013

Title

Application of Multi-source Data to Mineral Exploration in Tibetan Duolong Ore Concentration

Author

LIU Leizhen, YAO Fojun, WU Jianjun, YANG Jianmin, GENG Xinxia

Affiliations

Academy of Disaster Reduction and Emergency Management Ministry of Civil Affairs & Ministry of Education, Beijing Normal University; State Key Laboratory of Earth Surface Processes and Resource Ecology; Institute of Mineral Resources, Chinese Academy of Geological Sciences; MLR Key Laboratory of Metallogeny and Mineral Assessment

Abstract

Duolong, a porphyry copper ore concentration in the northern Tibet plateau, is the study area in the present work. New Remote Sensing technology is eagerly needed in Tibet. Therefore a prospecting method using multi-source data was developed. To obtain spectrum data, rock samples collected from the study area were tested with ASD-field Spec; alteration information was derived from the spectrum features. ETM+ data were used to obtain geological structure and lithology after image enhancement such as histogram equalization in ENVI software. Cuprum geochemistry information was combined with above to forecast prospecting target. It was found that alteration anomaly area distributed in the general direction of N-S and E-W, same direction as the main structure. Relationship between fault and Duolong ore-concentrated area is very close. Target regions, identified by auxiliary Copper element geochemical anomaly data, showed satisfactory ore prospecting results. Therefore this prospecting method based on multi-source data not only saves resource but can also reduce prospecting damage. Due to the severe weather and fragile ecological environment, this will be widely used in Tibet.

Key words

Tibet; ETM+; ASTER; Spectrum test; Prospecting; Geochemical data

cite

LIU Leizhen, YAO Fojun, WU Jianjun, YANG Jianmin, GENG Xinxia. Application of Multi-source Data to Mineral Exploration in Tibetan Duolong Ore Concentration [J]. Journal of Beijing Normal University(Natural Science), 2016,52(2):184-188.

DOI

10.16360/j.cnki.jbnuns.2016.02.013

Copyright © 2014 Journal of Beijing Normal University (Natural Science)
Designed by Mr. Sun Chumin. Email: cmsun@mail.bnu.edu.cn