摘要
结合矿床的蚀变特征,对相山铀矿田邹家山矿床和沙洲矿床不同标高的赋矿围岩及矿石样品进行了常量和微量元素地球化学分析,以制约成矿物质和成矿流体的来源。典型常量元素的变化趋势研究表明,相山矿田垂向蚀变分带明显,邹家山矿床浅部出露的蚀变岩以“碱性”蚀变为主,而沙洲矿床出露的蚀变岩以“酸性”蚀变为主,证实了相山地区蚀变“北碱西酸”的特征。对邹家山和沙洲两个矿床的微量元素进行了相关分析和Q型聚类分析,结果表明两个矿床的地球化学特征相似,Mo、Sr、Th、Tl、U、V、La、Ba是与成矿作用密切相关的元素,微量元素相关分析、Q型聚类分析及正交因子载荷关系分析说明两个矿床成矿热液来源于同一深部流体;正交因子载荷关系分析还表明,流纹英安岩与矿石有极强的相关性,暗示成矿物质最可能来源于流纹英安岩岩浆。
This article presents a geochemical analysis of the major and trace elements in the wall-rocks and ores at different elevations in the Zhoujiashan and Shazhou ore deposits of the Xiangshan uranium orefield.Combining the analysis results with alteration characteristics of the deposits,we aims to understand the source of ore-forming materials and fluids.The variation trend of the typical major elements shows that the Xiangshan orefield has obvious vertical alteration zonings.The alteration rocks exposed in the shallow part of the Zoujiashan deposit mainly show alkaline alteration,while those exposed in the Shazhou deposit mainly show acidic alteration,which confirms the alteration characteristics of“alkaline alteration in the north and acidic alteration in the west”in the Xiangshan area.Correlation analysis and Q-type cluster analysis of the trace elements in the two deposits show that the geochemical characteristics of the two deposits are similar.Mo,Sr,Th,Tl,U,V,La and Ba are closely related to mineralization.The above two analysis together with the study on loading relations of orthogonal factors reveal that the ore-forming hydrothermal fluids of the two deposits are derived from the same deep fluid.Moreover,the loading relations analysis of orthogonal factors also shows that rhyolite is strongly correlated with ore,suggesting that ore-forming materials are most likely derived from rhyolite magma.
作者
姚宏鑫
郭涛
朱随洲
施立虎
储照波
李令斌
陶铸
李新年
YAO Hongxin;GUO Tao;ZHU Suizhou;SHI Lihu;CHU Zhaobo;LI Lingbin;TAO Zhu;LI Xinnian(China Coal Land Ecological Environment Technology Co.,Ltd,Beijing 100070,China;Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;Geological Exploration Institute of Shandong Zhengyuan,Jinan 250101,Shandong,China)
出处
《地质力学学报》
CSCD
北大核心
2022年第1期90-100,共11页
Journal of Geomechanics
基金
科技部重点专项(2017YFC0602600)。
关键词
邹家山矿床
沙洲矿床
热液蚀变
成矿物质
元素地球化学
Zoujiashan deposit
Shazhou deposit
hydrothermal alteration
ore-forming materials
geochemistry of elements
