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| 俄罗斯西西伯利亚和外贝加尔地区古河道型铀矿床 | |
| 引用本文： | 绍尔Г.М,马尔科夫С.Н,鲁比诺夫И.М,佩什科夫 П.А.俄罗斯西西伯利亚和外贝加尔地区古河道型铀矿床[J].铀矿地质,2002,18(2):65-77. |
| 作者姓名： | 绍尔Г.М 马尔科夫С.Н 鲁比诺夫И.М 佩什科夫 П.А |
| 作者单位： | 1. 俄罗斯全俄地质研究所，圣彼得堡，199106 2. 俄罗斯"青山"国营地质企业，叶卡捷琳堡，620144 3. 俄罗斯"白桦"国营地质企业，新西伯利亚，630070 4. 俄罗斯"松林"国营地质企业，伊尔库次克，664039 |
| 摘 要： | 本文系统地介绍了俄罗斯 3个具有工业意义的古河道型铀矿化发育区 (外乌拉尔、西西伯利亚和外贝加尔 )的地质背景、铀矿化特征和铀成矿条件 ,指出切割到基底中的古河道型铀矿床 ,既可产于跨地区的造山带周围 ,也可产于活化的年青地台和古老地盾 ;既可形成于干燥的气候条件 ,也可形成于潮湿的气候条件。古河道型铀矿化可以从含矿层的沉积开始一直延续到被泥岩层或玄武岩层完全封盖。古河道的后成氧化分带有两种形式 :氧化带 铀矿化带 原生灰色岩石 ;氧化带 氧化铁再沉积带 漂白带 原生灰色岩石。古河道型铀矿床具宽广的元素谱 ,这主要是与含矿围岩富含有机质和在氧化带尖灭处存在各种地球化学障有关 |
| 关 键 词： | 古河道型铀矿床 后成氧化分带 地球化学障 |
| 文章编号： | 1000-0658(2002)02-0065-13 |
| 修稿时间： | 2000年9月8日 |
Paleochannel type uranium deposits in western Siberia and Transbaikal regions |
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| Shor G.M.Markov S.N..Paleochannel type uranium deposits in western Siberia and Transbaikal regions[J].Uranium Geology,2002,18(2):65-77. | |
| Authors: | Shor GMMarkov SN |
| Abstract: | This paper systematically introduces the geologic background,characteristics of uranium mineralization and uranium metallogenic conditions of the three regions in Russia(Transural,western Siberia and Transbaikal regions) where important paleochannel type uranium deposits have been discovered.Authors propose that those paleochannel type uranium deposits that incise the basement may occur both in the periphery of transregional orogenic belt and activated young plaform or ancient shield, may be formed both under arid and humid climate conditions.The ore-formation process of minerlization begins from the deposition of ore-hosting sediments and continues until the ore-hosting horizon is covered by impermeable clay or basalt layer.There are two types of paleochannel epigenetic oxidation zonation:oxidation zone-uranium mineralized zone-primary grey sandstone;oxidation zone-zone of iron oxide reprecipitation-zone of bleached rocks-primary grey sandstone.Ores of paleochannel type uranium deposits are enriched in a wide spectrum of associated elements which is related to the abundant content of organic matters in ore-hosting sandstone and the existense of various geochemical barriers at the pinch out sites of oxidation zone. |
| Keywords: | paleochannel type uranium deposit epigenetic oxidation zonation geochemical barrier |
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