基于Landsat 8和高分一号卫星数据的青海巴尔达吾地区铅、镍多金属矿化信息提取

Extraction of lead,nickel polymetallic mineralization information in Baldau,Qinghai based on Landsat 8 and GF-1 data

本文主要介绍在青海巴尔达吾地区通过运用美国Landsat 8(ETM+)和高分一号数据,提取了铁染遥感异常与羟基遥感异常蚀变信息,识别地层、岩体岩性信息并总结了主要地质体遥感地质特征及解译标志,同时解译出40多条线性构造及4处环形构造。结合区内地质、物化探资料,采用地质土壤(岩石)剖面、化学样等工作手段,对圈定的8处遥感蚀变异常优选了2处进行了含矿验证,在已提取的蚀变异常内发现了品位较高的铅锌矿、镍矿,空间耦合性较高。这不仅为研究区靶区圈定、地质找矿提供了依据,同时也说明遥感技术在矿产勘查中发挥着不可或缺的作用。

This article mainly introduces that in Bardagu area of Qinghai,we extracted iron staining remote sensing anomalies and hydroxyl remote sensing anomalies alteration information by applying American landsat8(ETM+)and Gaofen-1 data,identified stratigraphy and lithology information of rock body and summarized remote sensing geological features and interpretation signs of main geological bodies,and at the same time,more than 40 linear tectonics and 4 annular tectonics are deciphered.Combined with the geological,physical and chemical exploration data in the area,using geological soil(rock)profiles,chemical samples and other means of work,the 8 remote sensing alteration anomalies circled preferably selected 2 for the verification of mineralization,and in the extracted alteration anomalies were found to have high grade lead-zinc ore and nickel ore,with high spatial coupling.This not only provides a basis for target area delineation and geological prospecting in the study area,but also indicates that remote sensing technology plays an indispensable role in mineral exploration.