田艳丽　张瀚夫　乔彦波

摘要：在内蒙古东乌旗丘陵地区，运用土壤地球化学测量方法发现了许多有色和贵金属异常带，找矿潜力巨大[1]。在温都敖拉Ⅰ号靶区，通过1∶2.5万土壤扫面圈定了土壤综合异常，在异常上布设了1∶5000地质、土壤剖面，进一步圈定了元素高值区段的位置，为槽探工程布置提供了直接依据。预查工作最终通过少量槽探及稀疏的钻孔揭露，圈定出多条工业银、铜、铅锌矿体，显示出土壤地球化学测量方法在丘陵地区良好的找矿效果。

关键词：土壤测量；内蒙古东乌旗；温都敖拉Ⅰ号靶区

Abstract：In the hills region of Inner Mongolia Dongwuqi，we found many anomaly belts of non ferrous metal and precious metal by using geochemical soil survey. This area has a good prospecting potentiality. In the No.1 target area of Wenduaola，the abnormal area delineated by using soli scanning in the scale 1/25000. Through the geological and soil profile in the scale of 1/5000 in abnormal area could make the high value of elements more obvious. It also provides a direct basis for costeaning work. Ultimately，by using a little costeaning and drilling work，there are a lot of silver-bronze-lead-zinc ore-bodies with production grade are delimitated，and also show the good effects of prospecting by using geochemical soil survey in hills region.

Key words： soil surveying，Dongwuqi of Inner Mongolia，the No.1 target area of Wenduaola

鉴于内蒙古中西部地区风成砂覆盖严重，地表基岩露头差、水系又极不发育的情况，运用土壤地球化学测量方法寻找隐伏的有色金属、贵金属矿产发挥越来越重要的作用。通过土壤测量，能够迅速确定找矿靶区范围，为地质找矿提供较直接、可靠的地球化学找矿信息。

1. 概况

2011年～2012年我院在温都敖拉地区开展银、铅锌多金属矿产预查工作，通过1∶2.5万土壤测量在温都敖拉Ⅰ号靶区内圈定综合异常2个，经过1∶5000土壤剖面检查，进一步圈定了元素高值区段的位置，为槽探工程的布置提供了直接证据，最终经探槽揭露，于地表发现银、铜、铅锌矿化蚀变带1条，钻探工程在深部发现多条矿体。目前，该地区正在开展矿产普查工作。

2. 区域地质

温都敖拉地区处于西伯利亚板块东南大陆边缘与华北板块北部大陆边缘缝合带北侧，内蒙古华力西中晚期褶皱带的东乌珠穆沁旗复背斜中段，二连——东乌旗复背斜北翼[2]。……