The ore-bearing area in Dongcaohe is located in the foothill areas, in those areas, the alpine meadows developed and the quaternary covered with a thick. It is found that ground gamma-ray spectrometric survey cannot effectively delineate blind orebody, but radon measurement not only can find concealed structure, but also can effectively delineate deep blind orebody, provide effective basis for project layout.%东草河地区含矿地段多位于山麓地带，高山草甸发育，第四系覆盖较厚。地面伽马能谱测量无法对盲矿体进行有效圈定，而通过氡气测量不仅可以发现隐伏构造，还可对深部的盲矿体进行有效圈定，为工程布置提供有效依据。
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