Caractérisation géochimique des fluides associés aux minéralisations PbZn de Bou-Dahar (Maroc)

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• 作者：Adil ; Samira ; Bouabdellah ; Mohammed ; Grandia ; Fidel ; Cardellach ; Esteve ; Canals ; À ; ngel
• 关键词：Bou-Dahar ; Maroc ; inclusions fluides ; m&eacute ; lange ; saumures ; sulfures ; Bou-Dahar ; Morocco ; fluid inclusion ; mixing ; crush-leach ; brines
• 刊名：Comptes Rendus Geoscience
• 出版年：2004
• 出版时间：November, 2004
• 年：2004
• 卷：336
• 期：14
• 页码：1265-1272
• 全文大小：328 K

文摘

The Bou-Dahar PbZn Mississippi Valley deposits located in the eastern part of the High Atlas Range (Morocco) are hosted by a Liassic reefal complex. Fluid inclusion and ‘crush-leach’ data show that two distinct fluids were involved in the mineralisation deposition: a warmer, more saline fluid (180 °C, Formula Not Shown NaCl equivalent) and a cooler, less saline fluid (70 °C, 16 wt % equivalent NaCl). Mixing of these two fluids resulted in the precipitation of the ore. The solute composition of the ore-forming brine suggests that the MVT mineralising fluids were probably a mixture of halite-dissolution fluids and evaporated seawater. To cite this article: S. Adil et al., C. R. Geoscience 336 (2004).