锑矿的发现

2025-02-09 01:17:26
推荐回答(1个)
回答1:

在K-44-B、K-45-A幅南部、对应南天山有一条长达300km的汞、锑、金异常带,延至哈萨克斯坦共和国,和费尔甘纳汞锑矿带遥相衔接,引起人们的极大兴趣。查汉萨拉金砷锑异常属于巨形异常带中数十个异常之一(图13-1),所处大地构造对成矿有利;Au、As、Sb异常明显,形态规整,且套合较好;1:20万地质矿产图上有一铅锌矿化点,因而列为检查评价的异常。

图13-1 查汉萨拉一带金、砷、锑、汞异常图

优选查汉萨拉一带20km2的范围,用8.4件/km2的基岩采样迅速覆盖,圈出了南北两条明显的岩石地球化学异常带(图13-2)。该异常中除Sb外,且伴有As、Ag、Cu、Pb、Zn、Sn、Au等元素,显示了矿致异常特征。因此,将找矿目标进一步缩小在南、北两条约2.0km 2的小范围内。

图13-2 查汉萨拉南北岩石锑地球化学异常图(单位10-6

1989年在南带0.6km2的范围内,以1:10000岩石地球化学测量、采样网度100×40m,迅速圈出异常带东西长800m、宽100—150m,异常为北东-南西向展布,除Sb外尚伴有Cu、Pb、Zn、Ag、Sn、Au、Bi等元素。在平面图(图13-3)上各元素显示出水平分带韵律,从内向外依次排列为Bi(W)-Sn-Cu-Pb(Au)-Sb-Ag-As(Zn),这种元素排列与热液矿床地球化学元素分带性相一致,反映了矿致前缘异常特征。该异常平均强度Sb1580×10-6,最高6353×10-6,Ag最高13.4×10-6,Cu 149×10-6,Au最高486×10-9

1990年在北带做1:10000土壤地球化学测量,采样网度为100×50m,圈出银、锑异常带长1200m、宽50—100m,异常呈290°—310°方向展布,以Sb、Ag、Pb为主,伴有Cu、Zn、Sn、Au等元素,最高强度Sb 465×10-6、As 2259×10-6、Pb 1000×10-6、Sn>300×10-6、Bi>30×10-6、Ag>5×10-6、Au 60×10-9(图13-4)。

图13-3 新疆西天山查汉沙拉南矿带岩石地球化学异常剖析图

新疆西天山查汉沙拉锑矿田北矿带土壤测量异常剖析图

上述两个化探异常特点是规模大、元素组合好、强度高、衬度清晰,各元素在平面图上均有Ⅲ个浓度级。经异常检查,在第Ⅲ浓度级内即Sb>40×10-6、As>200×10-6、Ag>0.4×10-6、Cu>120×10-6、Pb>120×10-6、Zn>240×10-6、Au>8×10-9的地段内均能发现矿(化)体。

南带内见含锑石英脉5处,其中以查汉沙拉南带辉锑矿规模最大(图13-5)。

北带内见银、锑多金属矿(化)体7个,其中4个具有一定的规模。

图13-5 南矿带锑异常剖析图(单位10-6

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