the magnesite veins are located in the beni bousera massif (internal rif, morocco), especially in tafidest region about 103 km sw of the tetouan city. they are hosted by perridotite and serpentinite formations.  the aim of this study is to clarify the origin of this type of orre genesis. geochimical study of magnesite ore reveals that is a cryptocrystalline magnesite, formed by the co2-rich hyd...

mineral paragenesis of rodingitized basic rocks of iranian ophiolites are presented and metasomatic reactions between ca+2 bearing aqueous fluids issued during serpentinization of host ultramafic rock – with magmatic minerals of basic rocks leading to present paragenesis of rodingites are discussed. it is concluded that ca+2 rich aqueous fluid in equilibrium with serpentinite has high ca+2 chem...

Chemosynthetic ecosystems powered by microbial primary production are rare ‘hot spots’ of biological activity in the deep-sea characterized dense aggregations specially adapted animal species. Among settings where such systems have been found, serpentinite-hosted seep supported alkaline geofluid particularly understudied with just a few known sites worldwide. Mariana Forearc hosts world's only ...

The residence time of fluids circulating through deep-sea hydrothermal systems influences the extent water-rock reactions and flux major minor elements to ocean. While fluid times in numerous basaltic gabbroic have been determined, those less studied ultramafic are currently unknown. Fluids that interact with mantle rocks fundamentally different chemistries therefore unique on seawater chemistr...

The distribution of metamorphic rocks throughout the western European Alps indicates subduction-related metamorphism. However, processes by which high-grade exhume remain disputed. Here, we present two-dimensional petrological–thermomechanical numerical models to investigate facies evolution during orogenesis. We model closure an oceanic basin with exhumed mantle bounded passive margins. To ens...

Abstract. The reaction of serpentinized peridotite with CO2-bearing fluids to form listvenite (quartz–carbonate rock) requires massive fluid flux and significant permeability despite an increase in solid volume. Listvenite serpentinite samples from Hole BT1B the Oman Drilling Project help understand mechanisms feedbacks during vein formation this process. Samples analyzed study contain abundant...