西藏冈底斯成矿带斯弄多铅锌矿区激电异常特征及找矿意义

Character of IP anomaly and the significance to ore exploration in the Gangdisi Pb-Zn ore area,Tibet

斯弄多铅锌矿区位于冈底斯—念青唐古拉板块的隆格尔—工布江达弧背断隆带南缘的铅锌多金属成矿带内。通过激电测量工作,在矿区获得12个异常。经过评价解释,筛选出具有找矿价值的异常5个,其中南部地区2个、北部地区3个。南部地区的异常有JD1号异常,包含5个异常高值区,JD1-3为已知矿化异常。根据异常特征和成矿地质条件,将JD1号异常划分了3个远景区:Ⅰ号远景区由JD1-1号异常构成,Ⅱ号远景区由JD1-2号、JD4号异常和KHT1号、KHT2号矿化体组成,Ⅲ号远景区由JD1-3构成,Ⅲ号远景区可作为下步工作的重点地段。

Sinongduo Pb-Zn ore area is geotectonically located in the south margin of Longer-Gongbu- jiangda back arc uplift belt of Gangdisi-Nianqing Tanggula plate. IP survey delineates 12 anomalies. Five of 12 anomalies are screened out through interpretation and evaluation. Two of the five is in south of the ore area and 3 in the north. They are of significance to ore exploration. Anomaly JD1 in the south includes 5 high abnormal value zones of which JD1-3 anomaly is caused by the known mineralization and others also significant to ore exploration. On basis of the anomaly characteristics and the geological and metallogenic condition 3 prospects are lineated. Prospect Ⅰis composed of anomaly JDI-1 , prospect Ⅱanomaly JD1-2, JD4 and mineralized body KHT1 and KHT2, prospect Ⅲanomaly JD1-3. Prospect Ⅲis the focus for next exploration that will guide future exploration in the area.