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

被引：0

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：

暂无

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.

引用

页码：772 / 781

页数：9