老挝普老地区多金属矿地球化学异常特征及找矿前景
Geochemical anomaly features and exploration prospect of polymetallic deposits in the Pulao area, Laos
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摘要: 普老地区Pb、Zn、Sn多金属异常区位于老挝北部长山成矿带，1∶5万水系沉积物地球化学测量发现了以Pb、Sn为主，伴生Zn、Ag、W、Sb、Bi、As、Hg、Cu、Au等元素异常。1∶1万土壤地球化学测量圈定了3个综合异常带，Pb、Zn、Sn等元素具有异常强度高、规模大、浓集中心明显的特点，经异常检查发现铅锌、锡多金属矿化点13处。研究和分析异常区元素的地球化学分布和异常特征，认为该区多金属异常为矿致异常，具有寻找热液型铅锌、锡及多金属矿的潜力。Abstract: Pb, Zn, Sn polymetallic anomalous zones of the Pulao area are situated in the Changshan ore-forming belt in northern Laos. 1:50000 stream sediment geochemical survey identified major anomalies of Pb and Sn, accompanied by other anomalies of Zn, Ag, W, Sb, Bi, As, Hg, Cu and Au. 1:10000 soil geochemical survey delineated 3 comprehensive anomalous zones of Pb, Zn and Sn, which are characterized by high intensity and big size with distinct concentration centers. Test of the anomalies gave rise to 13 Pb, Zn, Sn polymetallic ore spots. Based on study and analysis of geochemical distribution of elements in the anomalous zones and their anomalous features, the authors hold that the polymetallic anomalies are related to mineralization, with potential in search for Pb, Zn, Sn and polymetallic deposits in the area.
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Key words:
- geochemical anomaly /
- hydrothermal deposit /
- Changshan metallogenic belt /
- Laos
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