CAJ | 학술논문

尕尔穷铜金矿的发现是近年来在西藏班公湖-怒江成矿带西段取得的重要找矿突破之一,目前已发现的矿体类型主要有接触交代矽卡岩型和构造破碎带型2种。前人在该区的研究已经注意到矽卡岩与花岗斑岩的成生联系,斑岩型矿产的成矿潜力较大。该文利用多光谱遥感图像,以寻找区内斑岩型矿床为目标,开展了线性构造、环形构造、铁帽类色要素和围岩分带的遥感解译,基于主成分分析法提取了遥感羟基异常和铁染异常。研究结果表明：区内主要发育NW-NNW向、NE-NNE向和近SN向3组线性构造；环形构造按组合样式可划分为5个环形构造系；铁帽类色要素与遥感异常较吻合；区内围岩分带较复杂,但多属斑岩铜矿成矿的有利围岩。综合分析认为,5个环形构造系为进一步找矿的重点区域。
소이궁동금광적발현시근년래재서장반공호-노강성광대서단취득적중요조광돌파지일,목전이발현적광체류형주요유접촉교대석잡암형화구조파쇄대형2충。전인재해구적연구이경주의도석잡암여화강반암적성생련계,반암형광산적성광잠력교대。해문이용다광보요감도상,이심조구내반암형광상위목표,개전료선성구조、배형구조、철모류색요소화위암분대적요감해역,기우주성분분석법제취료요감간기이상화철염이상。연구결과표명：구내주요발육NW-NNW향、NE-NNE향화근SN향3조선성구조；배형구조안조합양식가화분위5개배형구조계；철모류색요소여요감이상교문합；구내위암분대교복잡,단다속반암동광성광적유리위암。종합분석인위,5개배형구조계위진일보조광적중점구역。
The discovery of the Ga'erqiong Cu -Au deposit is an important breakthrough of ore prospecting in western Bangong Lake-Nujiang River metallogenic belt. There are two types of orebodies discovered in this area:One is skarn type, and the other is structure-fracture zone type. Previous studies in this area noticed the genetic relation between granite porphyry and skarn. The authors hold that the Ga'erqiong area has a relatively large ore potential of porphyry deposits. In this paper, based on multi-spectral remote sensing data and aimed at finding new porphyry deposits, the authors carried out the interpretation of linear structure, circular structure, gossan and wall rock zoning, and conducted the extraction of ferric alterations and hydroxyl alterations by using principal component analysis method. The results show that there are NW-NNW trending, NE-NNE trending and nearly SN -trending linear structure groups developed in the study area. Circular structures can be classified into five circular structure systems according to the combined styles. Gossans are comparatively in agreement with mineralized alterations. The wall rocks are rather complicated, but they are favorable for copper mineralization in the Ga'erqiong copper deposit. It is considered that the circular structure systems are the key areas for further ore prospecting.