Secondary mineral assemblages in a volcanic sequence of ODP Hole 104-642E, supplement to: Desprairies, Alain; Tremblay, P; Laloy, C (1989): Secondary mineral assemblages in a volcanic sequence drilled during ODP Leg 104 in the Norwegian Sea. In: Eldholm, O; Thiede, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 104, 397-409

Alain Desprairies, P Tremblay & C Laloy
Mineralogical and geochemical analyses of alteration products from upper and lower volcanic series recovered during ODP Leg 104 reveal variations both in composition and order of crystallization of clay minerals vesicles and voids filling and replacing glass. These results provide information about successive alteration stages of rocks and interlayered volcaniclastic sediments. The first stage, related to initial basalt-seawater interaction, is characterized by development of Fe-smectites, especially Fe-rich saponite. A second stage of intermittently superimposed subaerial...
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