论文部分内容阅读
香草坪岩体和豆乍山岩体同为苗儿山矿田中部的印支期花岗岩,它们空间关系密切,但香草坪岩体为非产铀花岗岩,而豆乍山岩体为产铀花岗岩,矿化特征显著差异。通过黑云母的矿物学特征对比,豆乍山产铀花岗岩黑云母蚀变程度强,化学成分富铝、铁,贫镁、钛,挥发性组分F质量分数较高,并且花岗岩成岩温度和氧逸度较低,有利于铀在花岗岩体富集和富铀矿物的析出,从而为晚期铀成矿提供成矿物质。这就是豆乍山岩体周边有大量铀矿床,而香草坪岩体不成矿,同为印支期花岗岩铀成矿能力却不同的主要原因。
The Xiangcaoping pluton and the Douzhanshan pluton are the Indosinian granites in the central part of the Miaolianshan ore field. They are closely related to each other in space. However, the Xiangcaoping pluton is a non-productive uranium granite, while the Beidazha mountain pluton is a uranium granite , Mineralization characteristics were significantly different. Through the comparison of the mineralogical characteristics of biotite, the biotite of uranium granite biotite in the Zhuzhushan area has a high degree of alteration, the chemical composition of aluminum, iron, magnesium, titanium and volatile component F is higher, and the granite diagenesis temperature and oxygen Fugacity is low, is conducive to uranium enrichment in the granite body and the precipitation of uranium-rich minerals, so as to provide ore-forming material for late uranium metallogenesis. This is because there are a large number of uranium deposits around the Douzhanshan rock mass, while the vaninolite rock mass is not mineralized, which is the main reason that the Indosinian granite uranium metallogenic ability is different.