Buatier, M.; Honnorez, J. (1990): Mecanismes de formation des argiles des halos noirs de basaltes oceaniques Formation mechanism of clays in the oceanic basaltic black halos. Gauthier-Villars, Montrouge, France, Comptes Rendus de l'Academie des Sciences, Serie 2, Mecanique, Physique, Chimie, Sciences de l'Univers, Sciences de la Terre, 310 (11), 1497-1503, georefid:1994-048565

Clay minerals in vesicles and miarolitic voids form black halos in zero age oceanic basalts. They correspond to mixtures of Fe-smectites with celadonite or glauconite. They are Fe-rich and present variable Al, Mg and K contents. The observation of these clay minerals at scales ranging from that of petrographic microscope to that of high resolution transmission electron microscope indicates that their formation mechanisms are very complex : they form not only by precipitating directly from hydrothermal fluids mixed with seawater but also by replacing basalt primary pyroxene and mesostasis
West: -92.0000 East: -89.0000 North: 1.0000 South: -1.3000
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