【作者】 庞保成； 张桂林；

【Author】 Pang Baocheng, Zhang Guilin(Guilin Institute of Technology, Guilin. 541004)

【机构】 桂林工学院资源与环境工程系；

【摘要】 右江盆地微细浸染型金矿是以沉积岩为容矿岩石的低温热液矿床,其成因还存在着许多争论。而热的来源研究是认识热液矿床成因的关键环节之一。本文分析了成矿地质背景及矿床与不同热源之间的关系,认为成矿作用过程中热的来源主要是地热增温,大气降水在盆地规模的渗流过程中除淋滤、萃取和搬运成矿物质外,还同时将深部地层中的热带到浅部,造成高达成矿温度的热异常。目前还需开展这方面的数值模拟研究,以期为成矿热机制提供定量数据。更多还原

【Abstract】 Micro-granular disseminated gold deposits in Youjiang Basin are epithermal deposits whose host rocks are sedimentary rocks. The genesis of these deposits is an enigma yet. Heat source is a key question to understand origin of hydrothermal deposits. After discussing geological background and relationship between deposits and several different heat sources, this paper concludes that heat source in the process of mineralization is geothermal gradient. In the process of seepage, meteoric water can extract and transport ore-forming substances, in the mean time, it can also bring the heat in deep strata to shallow to form temperature anomalies up to the ore-forming temperatures. In the present, it is needed to do mathematical modeling research which can offer quantitative data for ore-forming heat mechanism.更多还原