在砂金和砂铂的普查勘探中,重砂鉴定十分重要.这种鉴定工作与地质测量中的鉴定不同.地质测量时,采取重砂样品一般是为了确定有用矿物的机械扩散晕和研究区域性成矿规律.由于它着重要研究的是各种有用矿物的组合,而不严格要求确定这些矿物的数量,所以,一般都采用半定量的方法.砂金和砂铂的普查勘探则与此不同,需要鉴 In the survey of placer gold and sand platinum, the identification of heavy sand is very important.This appraisal is different from the identification in geological survey.When geologic survey, the sample of heavy sand is generally used to determine the mechanical dispersion of useful minerals and the research area Because of its emphasis on the study of a combination of useful minerals, rather than strictly required to determine the number of these minerals, so the semi-quantitative methods are generally used.Silver gold and Platinum census exploration is different, Need to learn