| 辽东地区太古宙绿岩带铁-铀型铀矿及其找矿前景 |
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| 引用本文： | 于宝山,赵忠华,田万文,刘晓东.辽东地区太古宙绿岩带铁-铀型铀矿及其找矿前景[J].国外铀金地质,2010(2):63-71. |
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| 作者姓名： | 于宝山 赵忠华 田万文 刘晓东 |
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| 作者单位： | [1]核工业240研究所,辽宁沈阳110032 [2]东北大学,辽宁沈阳110004 |
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| 摘 要： | 简叙辽东地区太古宙绿岩带地质背景,并结合太古宙绿岩带铁-铀型铀矿成矿地质特征的阐述,提出太古宙绿岩带铀成矿作用具有明显的前寒武纪主期性。讨论太古宙富铀钾质花岗岩相关的太古宙残留体内构造-蚀变岩控制铀矿的观点：提出古韧性剪切-破碎断裂带、太古宙基底岩体顶上凸起带之凹洼中的＂突触＂与碱交代岩等三位一体的构造空间和构造-蚀变岩定位层间-不整合破裂带关联-碱交代热液型铀矿的成矿模式,并且太古宙绿岩带铁-铀型铀矿围岩蚀变清楚,铀成矿谱系反映为初贫后富-叠加再造成矿的矿物组合;以复杂-叠加、脉络清楚的太古宙绿岩带构造环境相关的铀矿聚集区为例,探讨太古宙绿岩带铀成矿作用的多期性。并认为太古宙绿岩带铁-铀型铀矿矿体埋藏深、隐伏性强、盲矿体多,潜在的找矿前景相当可观。
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| 关 键 词： | 绿岩带 铀成矿 铁-铀型 盲矿体多 |
Iron-uranium type uranium deposit in Archean greenstone belt and its prospecting potential in the eastern Liaoning Province |
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| Authors: | YU Bao-shan ZHAO Zhong-hua TIAN Wan-wen LIU Xiao-dong |
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| Institution: | 1.Research Institute No.240,CNNC,Shenyang,Liaoning 110032,China;2.University of Northeast China,Shenyang,Liaoning 110004,China) |
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| Abstract: | The geological background is briefly discussed in this paper,combined with geological characteristics of iron-uranium type uranium deposit in Archean greenstone belt in the eastern Liaoning Province,it is suggested that uranium mineralization in Archean greenstone belt contains significant episode.It is discussed that structure-altered rocks control the uranium deposit in Achean strata which is related with uranium rich potassic granite.It is suggested that the structural space is a trinity of a palaeo-ductile shear-fractured belt,＇synapes＇ in the depression in the uplifted belt on the top of the basement and alkali-metasomatized rocks,and the metallogenetic model of alkali-metasomatized hydrothermal uranium deposit is related to the interlayer-unconformity fractured belt and structure-altered rock localization,the host rock alteration in iron-uranium type uranium deposits in Archean greenstone belt is quite clear.Uranium metallogenic spectral systems are reflected by the mineral assemblage of being formerly poor and later rich,suppersition and reworking ore formation.Multi-phases of uranium metallogenesis in Archean greenstone belt are discussed by taking the uranium accumulated areas which are complicated,superimposed,but have clear structure and related to the tectonic environment of Archean greenstone belt.It is considered that ore bodies buried deeply in iron-uranium type uranium deposit in Archean greenstone belt,have many blind ore bodies,the prospecting potential is very great. |
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| Keywords: | greenstone belt uramium metallogenesis iron-uranium type many blind ores |
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