基于沟里金矿集区线环构造与色调异常的找矿预测

青海沟里金矿集区内构造形迹复杂,岩浆作用强烈,变形变质广泛,具备形成大型—特大型金矿床的地质条件。通过对整个矿集区及外围区域的QuickBird、ASTER以及ETM等不同分辨率的影像进行了人机交互式线环构造解译和色调异常分析,分析区域内典型金矿床的影像特征,并找出有利的成矿线环构造。将色调异常区域与化探结果进行对比分析,得出其吻合度较高。最后,结合地质资料、遥感信息和化探信息,对靶区进行分级,圈定出有利的找矿区域。

Ore Prediction Analysis Based on Line-ring Structure and Tone Anomaly in Gouli Gold Deposits

Gouli gold deposits with complex structural features,intense magmatism, extensive deformation and metamorphism,it has the geological conditions of forming large-super large gold deposits.Based on the Quickbird, ASTER and ETM images of different resolution, we have been doing the man-machine interactive ring structural interpretation and tonal anomaly analysis.The analysis result shows that image features of typical gold deposits in the area and finds out the favorable metallogenic line-ring structures.Analysis of tone anomaly area and geochemical results concludes that its alignment is high.Finally,combining with geological data,remote sensing information and geochemical information,we have classified the target and marked out favorable prospecting area.