Geochemical Genes In The Weathering Of Lincang Granite,Yunnan Province,China

In order to trace the source of the products in the weathering process,Yan Taotao(2018)coded geochemical lithogenes by using the stability of immobile elements and in order to describe the mineralization degree of the samples and distinguish between mineralization and background samples,Li Ruikun(2019)constructed gold metallogene by using immobile elements and hydrothermal mineralization elements.In this paper,three mechanism of samples,the vertical weathering profile from rock to soil,the soil-stream sediments profile and 1: 200,000 regional geochemical exploration stream sediments of the Lincang granite in Meng'a Town,Menghai County,western Yunnan Province are selected to study and test the geochemical lithogene and gold metallogene.Based on the 70% genetic similarity standard,the geochemical lithogenes in the study area show good heritability and inheritance during weathering.The soil and stream sediments samples from the same parent rock have similar geochemical lithogenes,so the geochemical lithogenes can be used for source tracing.In terms of gold metallogene,there is a good genetic similarity between mineralized samples and unmineralized samples,but there is a significant difference in genes between unmineralized samples and mineralized samples.On the whole,gold metallogenes can be used to distinguisgh the degree of gold mineralization in this area,but the traceability is not ideal.Taking the similarity of 70% as the standard with similar genes,1:200,000 regional geochemical exploration stream sediments show similar geochemical lithogenes and gold metallogenes,which can well circle the sampling locations of weathering profiles and horizontal profiles samples.The regional geochemical exploration stream sediment data can be used to construct a geochemical lithogene library to trace the source of weathering products,which can be applied to basic geology,forensic geology and other fields.Gold metallogenes are used to distinguish the background samples from the mineralized samples,and they are applied to geological prospecting and other fields.