Relating unconformity-type uranium mineralization of the Alligator Rivers Uranium Field (Northern Territory, Australia) to the regional Proterozoic tectono-thermal activity: An illite K-Ar dating approach
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- 作者：Norbert Clauera ; nclauer@unistra.fr" class="auth_mail" title="E-mail the corresponding author ; Julien Mercadierb ; julien.mercadier@univ-lorraine.fr" class="auth_mail" title="E-mail the corresponding author ; Patricia Patrierc ; patricia.patrier@univ-poitiers.fr" class="auth_mail" title="E-mail the corresponding author ; Emmanuel Laverreta ; 1 ; emmanuellaverret@hotmail.com" class="auth_mail" title="E-mail the corresponding author ; Patrice Brunetond ; 2 ; p.bruneton@orange.fr" class="auth_mail" title="E-mail the corresponding author
- 关键词：Illite K&ndash ; Ar dating ; Unconformity-related uranium deposits ; Kombolgie sediments ; Basement rocks ; McArthur Basin ; Australian Northern Territory
- 刊名：Precambrian Research
- 出版年：2015
- 出版时间：October 2015
- 年：2015
- 卷：269
- 期：Complete
- 页码：107-121
- 全文大小：2401 K
文摘
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Illite separates of the Jabiluka and Nabarlek U deposits and of nearby exploration areas were K–Ar dated.
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Illite sets Proterozoic tectonic events at ∼1774, 1656, 1600, 1554, 1457, 1425, 1371, 1355 and 1318 Ma.
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Most of the host rocks underwent hydrothermal processes, mainly during 350 Ma from ∼1650 to 1300 Ma monitored by migrating basin-derived brines.
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Detected in the basin and the basement, illitization at ∼1656, 1600, 1554 Ma is associated with U.
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207Pb/206Pb ages from 1300 to 500 Ma on UO2 indicate reset U–Pb isotopic systems not linked to illitization.