兰坪思茅盆地第三纪矿床有机质特征及其地质意义

兰坪思茅盆地第三纪矿床富含有机质，有机地球化学研究认为，矿床中的有机质片地未成阶段或低级成熟阶段，其分布受中轴断裂带的控制，有机质为少相、陆相的有机沉积物，生物标志显示盆地第三纪成矿为裂谷构造环境。

Characteristics and geological significance of organic matter contained in tertiary ore deposits in Lanping-Simao basin, west Yunnan

The Tertiary ore deposits in Lanping Simao basin are rich in organic matter Studies on organic geochemistry have yielded the following understanding: Organic matter contained in the deposits are in an immature state or in a low developmental stage; the distribution of organic matter comprising organic sediments of marine or continental facies is controlled by intermediate axis fault; the biomarker shows that the Tertiary metallization in the basin took place in a rift tectonic setting The ore bearing hydrothermal solution produced along the intermediate axis faults caused the pyrolysis of the organic matter; the organic matter was mostly consumed to form a reduction condition with the generation of abundant H 2S as well as the enrichment and deposition of metallic sulfides A part of organic matter deposited together with sulfates and chlorides as a result of the absorption by terreaus The drop of ore foming temperature and the reduction of biota led to the formation of gas and coal in Late Tertiary