The giant Imiter silver deposit: Neoproterozoic epithermal mineralization in the Anti-Atlas, Morocco

被引：0
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作者：
Alain Cheilletz
Gilles Levresse
Dominique Gasquet
Moulay Azizi-Samir
Rachid Zyadi
Douglas A. Archibald
Edward Farrar
机构：
[1] Centre de Recherches Pétrographiques et Géochimiques,
[2] CRPG-CNRS and Ecole Nationale Supérieure de Géologie,undefined
[3] BP 20,undefined
[4] 54501 Vandoeuvre-les-Nancy cedex,undefined
[5] France,undefined
[6] REMINEX – groupe ONA,undefined
[7] 26 Av. Allal El Fassi,undefined
[8] Tissir 36–40,undefined
[9] Marrakech,undefined
[10] Maroc,undefined
[11] Geological Sciences,undefined
[12] Queen's University,undefined
[13] Kingston K7L 3N6,undefined
[14] Ontario,undefined
[15] Canada,undefined
来源：
Mineralium Deposita | 2002年 / 37卷
关键词：
Epithermal Silver Extensional tectonics Geochronology Neoproterozoic Morocco;
D O I：
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中图分类号：
学科分类号：
摘要：
The world-class Imiter silver deposit, in the Anti-Atlas Mountains of Morocco, is a Neoproterozoic epithermal vein deposit genetically associated with a felsic volcanic event, and formed within a regional extensional tectonic regime. Rhyolitic volcanism related to ore formation has been dated at 550±3 Ma by ion-probe U/Pb on zircons. The economic silver mineralization is superimposed on an older, discrete base-metal assemblage associated with calc-alkaline granodioritic magmatism. The magmatism is dated at 572±5 Ma by ion-probe U/Pb dating on zircons, and by 40Ar/39Ar dating on hydrothermal muscovites. In the Anti-Atlas Mountains, the Precambrian–Cambrian transition appears as an important period for the formation of major, productive precious-metal deposits associated with volcanic events and extensional tectonics. The Imiter silver deposit constitutes a Precambrian analogue to modern epithermal deposits.
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页码：772 / 781
页数：9
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