CAJ | 학술논문

青海三江北段是我国重要的多金属成矿区带，具有形成大型、特大型金属矿床的赋存条件及地质背景。纳日贡玛矿床是该区带中最为典型的斑岩型Cu-Mo矿床。针对斑岩型矿床的典型蚀变分带特征，利用ASTER数据，采用Crosta技术和比值法进行高岭石化、青磐岩化、黄铁矿化和硅化等遥感蚀变异常信息的提取；通过对ASTER和QuickBird图像的遥感解译，获得花岗斑岩体和断裂构造的空间分布图；根据纳日贡玛矿床的成矿规律和控矿要素，利用遥感数据获得的找矿预测因子，圈定了8个具有良好找矿前景的遥感找矿预测区，并总结出纳日贡玛的遥感蚀变异常分带规律，可为三江北段成矿带中其他斑岩型Cu-Mo矿床的找矿勘查提供重要参考信息。
청해삼강북단시아국중요적다금속성광구대，구유형성대형、특대형금속광상적부존조건급지질배경。납일공마광상시해구대중최위전형적반암형Cu-Mo광상。침대반암형광상적전형식변분대특정，이용ASTER수거，채용Crosta기술화비치법진행고령석화、청반암화、황철광화화규화등요감식변이상신식적제취；통과대ASTER화QuickBird도상적요감해역，획득화강반암체화단렬구조적공간분포도；근거납일공마광상적성광규률화공광요소，이용요감수거획득적조광예측인자，권정료8개구유량호조광전경적요감조광예측구，병총결출납일공마적요감식변이상분대규률，가위삼강북단성광대중기타반암형Cu-Mo광상적조광감사제공중요삼고신식。
The North Sanjiang metallogenic belt in Qinghai Province has excellent metallogenic conditions and geological background to form large or superlarge metal deposits, and Narigongma is the most typical porphyry Cu-Mo deposit in this region. Based on the typical characteristics of alteration zoning of the porphyry Cu-Mo deposit and using the ASTER data,the authors extracted the remote sensing alteration anomaly information of kaolinization, propylitization,pyritization and silicification by using Crosta technology and band ratio method. The distribution map of granite porphyry and faults was obtained on the basis of remote sensing interpretation of the ASTER and QuickBird images. According to the metallogenic regularity and ore-controlling factors of the Narigongma deposit, eight mineral prediction areas were delineated based on the mineral predictive factors derived from remote sensing data. The remote sensing characteristics of alteration zoning of Narigongma can provide important reference information for the exploration of porphyry Cu-Mo deposits in the North Sanjiang metallogenic belt.