在大型岩株(岩基)中找矿,采用常规地质方法和物探磁、电方法往往效果不很理想,而辅以化探方法多能收到较好的找矿效果。在内蒙古阿拉善左旗巴彦诺日公苏木萨格勒日—浩恩丹地区的1∶5万土壤及水系沉积物测量中发现有较好的 W,Mo 异常；在此基础上选区进行1∶1万土壤地球化学测量,在萨格勒日等地发现了16处综合异常区。对萨格勒日异常进行检查,地表拣块样 W 元素2个高值 w(W)=0.022%和0.0103%,w (Ag)=8.78×10-6；对浩恩丹一带异常进行槽探工程揭露,查明2条辉钼矿脉,钼品位 w(Mo)=0.034%~0.14%,地表矿脉延伸600~800 m。研究认为,钼矿化受构造和岩浆岩的控制,提出了2个找矿远景区,预测在巴彦诺日公花岗岩体中寻找钼矿、钨矿的工作有望取得成效。%Only geophysical survey (magnetic or electric method)for ore prospecting in large stocks and batholithes is often not ideal but geological survey together with geochemical survey are ideal.Soil and river sediment survey at scale 1∶50000 in Sageleri-Haoendan area show evident W,Mo anomlies and 1 6 integrated anomlies are located by further soil survey at scale 1 ∶ 10000 at Sageleri.Samples are picked from Sageleri anomly of which two are high in element W (0.022%,0.010 3%)and Ag (8.78 ×10 -6 ). Trenching at Haoendan reveals two molybdenite veins with grade of w(Mo)=0.034%~0.14% and surfa-cial extension of 600~800 m.The molybdenite mineralization is controlled by both structure and magmat-ic rock.Accordingly the Sageleri and the Haoendan are located as the two potential prospects and prospec-ting breakthrough of Mo and W in Bayan Nuru granite body is predicted.
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