Laurent Turpina , Norbert Clauer , Pierre Forbes , Maurice Pagel
{"title":"尼日尔Akouta铀矿床UPb、SmNd和KAr系统","authors":"Laurent Turpina , Norbert Clauer , Pierre Forbes , Maurice Pagel","doi":"10.1016/0168-9622(91)90022-O","DOIUrl":null,"url":null,"abstract":"<div><p>Different minerals of the Akouta sandstone-hosted uranium ore deposit in Niger have been investigated by Ub, SmNd and KAr isotopic systematics. The age of mineralization, derived from U-Pb and K-Ar results, is between ∼ 260 and ∼ 130 Ma, which contrasts with the Viséan age of the host Guézouman Formation (∼335 Ma) and consequently rules out a synsedimentary origin of the U ore. SmNd data on uranium oxide samples are widely scattered and do not provide valuable chronological information. However, Nd isotope data suggest that the regional peralkaline volcanic or plutonic rocks were a probable source of uranium for the Akouta ore deposit.</p></div>","PeriodicalId":100231,"journal":{"name":"Chemical Geology: Isotope Geoscience section","volume":"87 3","pages":"Pages 217-230"},"PeriodicalIF":0.0000,"publicationDate":"1991-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0168-9622(91)90022-O","citationCount":"17","resultStr":"{\"title\":\"UPb, SmNd and KAr systematics of the Akouta uranium deposit, Niger\",\"authors\":\"Laurent Turpina , Norbert Clauer , Pierre Forbes , Maurice Pagel\",\"doi\":\"10.1016/0168-9622(91)90022-O\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Different minerals of the Akouta sandstone-hosted uranium ore deposit in Niger have been investigated by Ub, SmNd and KAr isotopic systematics. The age of mineralization, derived from U-Pb and K-Ar results, is between ∼ 260 and ∼ 130 Ma, which contrasts with the Viséan age of the host Guézouman Formation (∼335 Ma) and consequently rules out a synsedimentary origin of the U ore. SmNd data on uranium oxide samples are widely scattered and do not provide valuable chronological information. However, Nd isotope data suggest that the regional peralkaline volcanic or plutonic rocks were a probable source of uranium for the Akouta ore deposit.</p></div>\",\"PeriodicalId\":100231,\"journal\":{\"name\":\"Chemical Geology: Isotope Geoscience section\",\"volume\":\"87 3\",\"pages\":\"Pages 217-230\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1991-10-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0168-9622(91)90022-O\",\"citationCount\":\"17\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemical Geology: Isotope Geoscience section\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/016896229190022O\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Geology: Isotope Geoscience section","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/016896229190022O","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
UPb, SmNd and KAr systematics of the Akouta uranium deposit, Niger
Different minerals of the Akouta sandstone-hosted uranium ore deposit in Niger have been investigated by Ub, SmNd and KAr isotopic systematics. The age of mineralization, derived from U-Pb and K-Ar results, is between ∼ 260 and ∼ 130 Ma, which contrasts with the Viséan age of the host Guézouman Formation (∼335 Ma) and consequently rules out a synsedimentary origin of the U ore. SmNd data on uranium oxide samples are widely scattered and do not provide valuable chronological information. However, Nd isotope data suggest that the regional peralkaline volcanic or plutonic rocks were a probable source of uranium for the Akouta ore deposit.
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