安徽庐枞地区富铀矿成矿特征及形成环境浅析
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摘要
庐枞地区富铀矿床位于安徽省庐枞火山岩盆地南东的大龙山岩体及黄梅尖岩体北缘外带侏罗系中统罗岭组地层中,铀矿化受构造、岩性、岩体接触带和热液蚀变联合控制,铀矿体品位高。文章阐述了该地区富铀矿的成矿特征:矿体主要产于断裂构造夹持或交汇处,主要赋存于靠近岩体外带中粗粒砂岩中,其规模、厚度、品位和形态变化大;富铀矿以角砾状构造和黑色脉体产出,均以沥青铀矿的形式存在;富铀矿是多次叠加致富的产物等。依据该区多年来的铀矿找矿资料综合分析结果,初步认为庐枞地区富铀矿形成于碱性介质、还原环境、为低压、中低温度和快速沉淀的地球化学环境。
The uranium of Lu Zong deposits in the strata of Middle Jurassic Luoling group,southeast of Luzong volcanic basin Dalong rock and outer contact zone in north side of Huangmeijian rock , in Anhui province .The uranium mineralization is influenced by structure, lithology, rock mass with contact and hydrothermal alteration. The uranium ore of this region is rich in quantity and high in grade. The authors studied several features of the rich uranium in Luzong regions, An Hui Province. For example, the ore body is mainly found in the fracture clamping or interchanging areas, and rich uranium ore body is near the rock to go in coarse grained sandstone. It changes greatly in scale、thickness 、grade and shape . It is usually in brecciaed structure and black veins body and exists in the form of asphalt. Rich uranium gets rich from lots of staking. According to the comprehensive analysis of the uranium deposit prospecting data of the past, there comes the preliminary conclusion that rich uranium in Luzong regions is formed under complicated geochemical environment which is composed of alkali medium, reductive environment, low-pressure conditions, low temperature and rapid precipitation.
The uranium of Lu Zong deposits in the strata of Middle Jurassic Luoling group,southeast of Luzong volcanic basin Dalong rock and outer contact zone in north side of Huangmeijian rock , in Anhui province .The uranium mineralization is influenced by structure, lithology, rock mass with contact and hydrothermal alteration. The uranium ore of this region is rich in quantity and high in grade. The authors studied several features of the rich uranium in Luzong regions, An Hui Province. For example, the ore body is mainly found in the fracture clamping or interchanging areas, and rich uranium ore body is near the rock to go in coarse grained sandstone. It changes greatly in scale、thickness 、grade and shape . It is usually in brecciaed structure and black veins body and exists in the form of asphalt. Rich uranium gets rich from lots of staking. According to the comprehensive analysis of the uranium deposit prospecting data of the past, there comes the preliminary conclusion that rich uranium in Luzong regions is formed under complicated geochemical environment which is composed of alkali medium, reductive environment, low-pressure conditions, low temperature and rapid precipitation.
引文
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[9]安徽省地质调查院.安徽省1∶50万区域调查报告[R].2005.
[10]安徽省核工业勘查技术总院.安徽省铀矿资源调查评价报告[R].2010.
[2]刘湘培,常印佛,吴言昌.论长江中下游地区成矿条件和成矿规律[J].地质学报,1988,(2):74-84.
[3]张祖还,沈谓州,闵茂中.8411铀矿床成因的稳定同位素研究[J].世界核地质科学,1983,(4).
[4]丁鹏飞.庐枞地区1∶5万综合物化探调查的初步应用[J].物探与化探,1984,(1):43-55.
[5]安徽省地质矿产局.安徽省区域地质志[M].北京:地质出版社,1987.
[6]安徽省地矿局区调队.1∶5万矾山镇、将军庙幅区调报告[R].1981.
[7]安徽省区调队.1∶5万义津桥幅、枞阳幅、汤沟幅区调报告[R].1985.
[8]安徽省地矿局326地质队.1∶5万怀宁幅区调报告[R].1989.
[9]安徽省地质调查院.安徽省1∶50万区域调查报告[R].2005.
[10]安徽省核工业勘查技术总院.安徽省铀矿资源调查评价报告[R].2010.
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