关键词: 蚀变带, 微量元素, 地球化学, 小石人金矿

Abstract: Based on the trace element analysis of different rock(ore) types in the Xiaoshiren gold deposit in Jilin Province and viewed from data structures, the authors discuss the geochemical characteristics of these trace elements. Statistical parameters showed that the trace elements studied are of apparent concentration and enrichment features in deposit area. Different rock(ore) types have the different trace element distribution characteristics, and based on which the authors classify the rocks(ores) in the deposit into three types-normal, weak-altered and strong-altered(or mineralized). The multivariate statistical analysis results indicate that all the trace elements studied had taken part in the gold mineralization processes. However, their behavior was quite different. Based on the multivariate statistics characteristics, the authors divided the trace elements into three assemblages: namely Au, As, Sb, Bi, Hg, Mn; Cu, Pb, Zn, Ag and Co, Ni, V. The first assemblage is oreforming and halo-forming elements, the second assemblage polymetallic mineralized elements and the third assemblage is the elements related to pyritization. These assemblages are also related to different mineralization stages, revealing gold metallogenic processes and corresponding features. The trace element profiles of soil and rock show that their spatial correlation except Mn that is negatively related to Au and was abnormally enriched in the outer zone of the Au mineralization.

Key words: alteration zones, trace elements, geochemical, Xiaoshiren gold deposit