热带雨林区地质填图方法技术实践

Technoligical practice of geological mapping method for tropical rain forest areas

热带雨林区化学风化强烈,风化层覆盖厚,植被发育,基岩裸露少。如何有效利用覆盖层获取覆盖区的地质矿产信息,是热带雨林区地质调查工作的重要内容之一。在云南勐满镇南罕寨研究区开展的热带雨林区地质矿产勘查技术方法的实践探索中,采用以土壤地球化学测量、浅层取样钻为主,融合地质路线调查的地质矿产信息探测方法技术,所获取的地质界线与1∶5万地质填图基本吻合,同时圈定了3个具有一定找矿前景的综合异常。此次调查可为热带雨林区地质填图方法技术指南的编写提供参考。

Tropical rain forest areas feature strong chemical weathering,thick weathered layers,developed vegetation,and less exposed bedrock.It is one of the essential geological survey contents of tropical rainforest areas to obtain geological and mineral information of coverage areas by effectively utilizing overburden layers.This paper summarizes the geological and mineral information detection methods employed in exploring the geological and mineral exploration technologies in the tropical rainforest area in the Nanhanzhai experimental area,Mengman town.In detail,the methods were dominated by soil geochemical survey and sampling drill and combined geological route survey.The geological boundaries obtained using these methods roughly coincide with 1∶50,000 geological maps,and three integrated anomalies with certain prospecting prospects were delineated using these methods.This study can serve as a reference for preparing the technical guide to geological mapping methods suitable for tropical rainforest areas.