西南天山赛勒克台萨拉地区花岗闪长岩岩石地球化学特征及找矿方向

Geochemical Characteristics and Future Prospecting of Granodiorite in Saileketaisala area, Southwest Tianshan

西南天山赛勒克台萨拉地区已发现有铜金矿化存在,这些铜金矿化产于花岗闪长岩体中。对花岗闪长岩进行的岩石学、地球化学研究表明,花岗闪长岩主要由斜长石、钾长石、石英和黑云母组成,微细粒半自形粒状结构,块状构造;岩石具有中—高钾钙碱性、I型花岗岩的特征;岩体形成于石炭纪,是南天山洋向北俯冲在天山南缘活动大陆边缘形成的岛弧岩浆侵入体,与埃达克岩有一定的相似特征;该地区的找矿方向应以斑岩型矿床为主。

Saileketai Sala area in Southwest Tianshan has been found copper and gold mineralization, the copper and gold mineralization occurs in the granodiorite. The study of petrology, geochemistry of granodiorite shows, granodiorite is mainly composed of plagioclase, K-feldspar, quartz and biotite, fine particle hypidiomorphic granular texture, massive structure; the rock characteristics is middle-high potassium calcalkali, I type granite; the rock is an arc magma located in the south margin of active continental margins, which the South Tianshan ocean crust northward subduction in the Carboniferous, the rock characteristics is similar with adakite; future prospecting of this area should mainly be the porphyry deposits.