有机质在贵州晴隆大厂锑矿成矿过程中的作用

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	有机质在贵州晴隆大厂锑矿成矿过程中的作用
	叶造军
	1994
学位授予单位	中国科学院地球化学研究所
学位授予地点	中国科学院地球化学研究所
学位名称	博士
学位专业	地球化学
关键词	大厂锑矿包裹体模拟实验有机质的作用
摘要	锑成矿中有机作用的研究国内外进行得极少，本文首先运用（有机）包裹体探讨了大厂锑成矿流体的一系列物理化学性质和主要成矿特征：1．成矿温度与盐度分别为150-180℃ 和10-12 Wt%，2．主成矿阶段水质类型属 F-SO_4Ca－K型，气相成份中甲烷含量较高(C_1/C_2～C_4 > 1)，3. 成矿介质水主要来自大气降水，δD＝-63～-66‰, δ~(18)O = -3.5～-0.6‰)。有机地球化学研究显示岭好组有机碳含量高（平均 Corg = 0.71% > 0.5%)，完全具备生油能力，是一重要的烃源层。有机质反射率（Ro）达1.87-2.93%，演化程序较高，热变沥青多呈充填状，具明显的运移特征。模拟实验证明石油对锑有较强的萃取能力，可作为 Sb 迁移的良好载体；且按萃取实验结果，有机迁移与无机迁移同等重要。对腐殖酸（质）和高硫原油作了较详细的讨论－－腐殖酸（质）在形成矿源层中有重要作用，高硫原油热裂解本身可以产生H_2S，提供部份硫；而辉锑矿的最终形成则缘于大气降水的加入，温度降低和氧化等因素综合作用的结构。总结不同阶段不同有机质的不同作用，提出了有机－无机综合成矿模式。
其他摘要	Only few investigations on the role of organic matter in antimony mineralinzation have been carried out according to a literature survey. Based on the fluid inclusions studies, the physical and chemical properties of ore fluids and major characteristics of mineralization have been discussed for the DaChang antimony deposit, QingLong, GuiZhou province: 1. The mineralizing temperature and salinity of ore-forming fluid are 150-180℃ and 10-12 Wt%, respectively. 2. The ore fluids belong to F~--SO_4~(2-)-Ca~(2+)-K~+ type and the methane is higher in gas-phase compositions (C1/C2～C4 > 1). 3. The water of ore-forming fluids mainly came from the meteoric water (δD--63～-66‰, δ~(18)O = -3.5～-0.6‰). The organic geochemical research revealed that the contents of organic carbon are high in Linghao Formation (average Corg = 0.71% > 0.5%), which is an important source bed of hydrocarbon with larger capacity of oil generation. The high reflectivity (Ro = 1.87-2.93%) of the organic material showshigh evolutional maturity. The thermal alternated bitumens always occurred in filling form that shows apparrently the moving feature. The simulating experiments confirmed that the oil can extract the element Sb intensively and become a good carrier for antimony. According to the extraction experiments, it is believed that both the organic and inorganic moving function is of the same importance. the roles of humicacid (matter) and high sulphur oil in metallogenesis have been discussed in detail. The former is significant in the formation of ore source bed, whereas the latter could be a source of sulphur by means of its pyrolysis. Finally, the formation of stibnites is resulted from the combination of the addition of meteoric water、the decreasing of temperatire and the oxidation and etc. Anintegrated metallogenic model has been presented based on the comprehensive analyses on the vared function of different kinds of organic matter in whole mineralizing stages.
页数	60
语种	中文
文献类型	学位论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/3954
专题	研究生_研究生_学位论文
推荐引用方式 GB/T 7714	叶造军. 有机质在贵州晴隆大厂锑矿成矿过程中的作用[D]. 中国科学院地球化学研究所. 中国科学院地球化学研究所,1994.