摘要
应用聚类分析和因子分析对金川铜镍硫化物矿床样品及其微量元素进行了分析和科学分类,并对分类的样品进行R型因子分析,找寻在成矿作用过程中对成矿贡献起关键性作用的因子。因子分析结果表明,富矿类型的网状矿石与贫矿类型的星点状矿石的Ni,Cu矿化期存在着明显的差异性;网状矿石在成矿作用过程中,经受了晚期晚阶段的中、低温热液作用,使矿石中的主要成矿元素Cu产生了进一步的叠加和富集,并伴有Bi,Se,Te及贵金属元素的富集。因子分析的研究为脉动式多期多阶段的成矿机制模式提供了新的依据,同时,也为矿床中有用伴生元素的赋存状态及找寻提供了有用的成因信息。
The cluster analysis and factor analysis for the trace elements of different ore-bearing samples from Jinchuan copper-nickel ore-deposit were conducted. We classified the ore samples using the Q-cluster analysis, and studied the classified samples with R-factor analysis to discuss the key factors, which play important parts in the mineralization process. The results of factor analysis show distinct differences for different mineralization stages between the stockwork type ores and the spotted ores. Besides, it is also indicated that there exist late stage middlelow temperature hydrothermal alterations during the mineralization process of the stockwork type ores, which made the ores enrich Cu, Bi, Se, Te and some precious metal elements. The factor analysis not only provides new genetic evidence for pulsating mineralization mechanism, but also provides useful information about the valuable accompanying elements.
出处
《高校地质学报》
CAS
CSCD
北大核心
2007年第1期127-136,共10页
Geological Journal of China Universities
基金
国家自然科学基金项目(No.40272025)资助成果
关键词
聚类分析
R型因子分析
成矿机制
热液活动
铜镍硫化物矿床
cluster analysis
R-factor analysis
pulsating mineralization mechanism
middle-low temperature hydrothermal process
Jinchuan copper-nickel ore deposit
