基于WorldView2数据解析云南普朗铜矿遥感地质构造特征

Remote Sensing Interpretation of Geological Structure Features Based on WorldView2 Data of Pulang Cu Deposit,Yunnan Province

云南普朗铜矿床为义敦岛弧带南端超大型斑岩型矿床,地质构造复杂,但矿区与外围地区构造的连续性及矿区内次级构造的研究程度还较低.本文基于不同尺度对普朗矿区进行遥感地质解译.在遥感图像上普朗-松诺地区显示出一个大型环形构造,是“西南三江成矿带”条带状景观中的地质异常单元.斑岩群分布于其中,揭示了斑岩群及其上侵造成的穹隆构造之整体空间范围.高空间分辨率WorldView2图像上显示出普朗矿区内不同规模层次的次级环形构造和线性构造;本文在分析了与侵入岩体、围岩蚀变及矿化相关的环形构造特征的基础上,拟定普朗矿区遥感找矿标志,圈定了找矿远景区.

The Pulang copper deposit in Yunnan is a super-large porphyry-type deposit located at the southern end of the Yidun Island arc.The geological structure of this area is complex,with limited research on the continuity of the structural features between the mining area and the surrounding areas,as well as the secondary structures within the mining area.This study employs remote sensing geological interpretation at different scales to investigate the Pulang mining area.On remote sensing images,the Pulang-Songnuo region exhibits a large circular structure,identified as a geological anomaly unit within the“Southwest Sanjiang Metallogenic Belt.”The distribution of porphyries within this unit reveals the overall spatial extent of the dome structures formed by the intrusion of porphyritic rocks.High spatial resolution WorldView2 images reveal secondary circular and linear structures of varying scales within the Pulang mining area.Based on the analysis of circular structures related to intrusive rocks,alteration of surrounding rocks,and mineralization,this paper proposes remote sensing exploration indicators for the Pulang mining area,outlining prospective exploration areas.