摘要
西藏班公湖—怒江成矿带是重要的铁铜金多金属成矿带,矿产资源丰富,找矿前景良好,但其地处青藏高原,自然地理条件较差,利用遥感技术进行矿产资源调查及找矿预测,不仅能克服自然环境的限制,而且能缩短工作周期、降低生产成本等。文章以日土地区为研究区,利用不同平台的多光谱遥感数据,结合已有地质矿产资料的分析,进行了遥感岩性—构造解译,并基于岩矿波谱特征,提取出了铁染、Al-OH和Mg-OH等遥感蚀变信息,在野外调查验证的基础上,重新厘定了部分岩性地层和岩体界线,修正和补充了部分断裂构造,新发现了8处铜铁多金属矿(化)点,通过成矿地质条件和找矿预测研究,圈定了16处遥感找矿靶区,为西藏日土地区进一步开展矿产资源调查工作提供了基础资料和科学依据。
The Bangong Lake - Nujiang metallogenic belt is an important iron - copper - gold polymetallic metallogenic belt, which is abundant in mineral resources and has great prospecting potential. Due to poor natural conditions in the Qinghai - Tibet Plat- eau, using remote sensing technology for mineral resources survey and prospecting prediction not only overcomes the limitations of the natural environment, but also shorten the exploration cycle and reduce exploration costs. In the case study of the Ritu area by the re- mote sensing technology, the lithological units and structures were interpreted based on the analysis of Multi - spectral remote sensing data from different platforms in combination of the existing geological and mineral resource information. The alteration information such as iron stained, A1 - OH and Mg - OH were extracted based on the remote sensing spectral characteristics of rocks and mineralized zone. The partial boundaries of lithological, stratigraphic and intrusive body boundary were re - determined, some faults were revised and determined based on the field investigation and verification. Eight copper （-iron） polymetallic ore occurrences were discovered. Sixteen remote sensing prospecting targets were delineated by the integrated analysis of ore - forming geological conditions and prospec- ting prediction. These results provide basic data and scientific basis for the further investigation of mineral resources in Ritu area, Ti- bet.
出处
《矿产勘查》
2014年第2期322-329,共8页
Mineral Exploration
基金
中国地质调查局地质调查项目(编号:1212011121298)资助
关键词
多光谱遥感
遥感地质解译
蚀变信息提取
找矿预测
日土地区
西藏
multi spectral remote sensing
remote sensing geological interpretation
alteration information extraction
prospec-ting prediction
Ritu area
Tibet
