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Hydrothermal Alteration of the Oceanic Crust
1989Recycling of the oceanic crust is potentially a dominant process in the formation of OIB mantle sources (Hofmann et al. 1978; 1986) and is a significant contribution to the flux of material between the continent and the depleted mantle (Albarede and Michard, 1986).
Francis Albarede, Annie Michard
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Hydrothermal Alteration and Weathering
1955A considerable group of minerals, including the clay minerals, zeolites, pyrophyllite, chlorite, alunite, vermiculite, certain carbonates, sulfates, and other minerals under special circumstances, may originate through the interaction of thermal fluids and rock masses.
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Hydrothermal alteration of igneous rocks
Geological Society of America Bulletin, 1939Many studies of individual examples of hydrothermal alteration have been made, but a general summary has not appeared since 1915. The changes due to hydrothermal alteration are textural, mineralogical, and chemical. As a rule the primary texture is destroyed, roughly in proportion to the intensity of alteration, but only in extreme examples is it ...
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Hydrothermal Alteration by Veins
1995Sedimentary series, as well as crystalline basements, are cross-cut by fracture networks along which fluids of different origins (meteoric, connate, metamor-phic, magmatic) have percolated. Chemical interactions with rocks along these pathways produce secondary minerals among which phyllosilicates are usually the dominant species.
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Facies and types of hydrothermal alteration
Economic Geology, 1962Most hydrothermally altered rocks are readily grouped into 2 principal facies, the argillic and phyllic (mica) facies. The argillic facies comprises the propylitic, montmorillonitic, and kaolinitic types, and the phyllic facies the muscovitic and biotitic types.
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Hydrothermal alteration of Phosphoria mudstones [Montana]
Journal of Sedimentary Research, 1957Samples of phosphatic mudstone collected from several measured sections in the Retort Phosphatic Shale Member of the Phosphoria Formation near Divide, Montana, contain an abundance of montmorillonite, locally associated with kaolinite and talc. Of several possible modes of origin, hydrothermal alteration of pre-existing illite to montmorillonite best ...
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Hydrothermal Processes and Wall Rock Alteration
2009In this chapter, I discuss the effects that hydrothermal fluids derived from internal processes have on the ambient lithologies. I begin by describing the main components of a hydrothermal system and models of magmatic-related hydrothermal processes. Circulation of these hydrothermal solutions or fluids, produces physico-chemical changes in the rocks ...
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