Results 201 to 210 of about 22,333 (258)
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Nature, 1957
L'Evolution de la Lithosphere Par Prof. Henri Termier et Dr.Genevieve Termier. 1 : Petrogenese. (Traite de Geologie.) Pp. iv + 654 + 54 plates. (Paris: Masson et Cie., 1956.) Broche, 8,000 francs; Cartonne toile, 8,800 francs.
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L'Evolution de la Lithosphere Par Prof. Henri Termier et Dr.Genevieve Termier. 1 : Petrogenese. (Traite de Geologie.) Pp. iv + 654 + 54 plates. (Paris: Masson et Cie., 1956.) Broche, 8,000 francs; Cartonne toile, 8,800 francs.
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Detailed petrogenesis of the unsampled Oceanus Procellarum: The case of the Chang'e-5 mare basalts
Icarus (New York, N.Y. 1962), 2022Qi He +15 more
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Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1977
Melting experiments in vacuum at Fe-saturation for high-Ti basalt compositions 70215 and 15318 Red Glass, and low-Ti basalt composition 15555-15016, have defined equilibrium crystallization sequences and the liquid-lines-of-descent, and show that much of the chemical variety in the natural samples is due to near-surface fractionation processes. However,
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Melting experiments in vacuum at Fe-saturation for high-Ti basalt compositions 70215 and 15318 Red Glass, and low-Ti basalt composition 15555-15016, have defined equilibrium crystallization sequences and the liquid-lines-of-descent, and show that much of the chemical variety in the natural samples is due to near-surface fractionation processes. However,
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Clays and clay minerals (National Conference on Clays and Clay Minerals), 1963
AbstractThe formation of typical bentonites occurs in two stages. The first stage comprises the development, transportation, and deposition of the volcanic ash, which determines the geometry and structure of the bentonite rock and influences the alteration of the ash during the second stage. The second stage encompasses the alteration of volcanic glass
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AbstractThe formation of typical bentonites occurs in two stages. The first stage comprises the development, transportation, and deposition of the volcanic ash, which determines the geometry and structure of the bentonite rock and influences the alteration of the ash during the second stage. The second stage encompasses the alteration of volcanic glass
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Petrogenesis of ophiolitic chromitite
Geological Society, London, Special Publications, 1993Abstract Chromite deposits comprise an integral part of the mantle sequences observed within many ophiolite complexes; in particular, those where a harzburgite is the dominant mantle sequence lithology. The chromite segregations are invariably contained within a dunite envelope and show a wide variety of ore textures, some of which are ...
Stephen Roberts, Christopher Neary
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Nature, 1939
THIS memoir is probably the most instructive contribution to modern petrology since Brogger published his description of the Oslo area (1931)1. It describes the north-eastern (British) part of the Birunga lava-field—a region of Tertiary and Recent vulcanism which produced ‘alkali’ lavas of basic to intermediate composition. The field extends along, and
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THIS memoir is probably the most instructive contribution to modern petrology since Brogger published his description of the Oslo area (1931)1. It describes the north-eastern (British) part of the Birunga lava-field—a region of Tertiary and Recent vulcanism which produced ‘alkali’ lavas of basic to intermediate composition. The field extends along, and
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Oxidation in High Temperature Petrogenesis
American Journal of Science, 1961A study has been made of a variety of metamorphic and magmatic rocks to determine how oxidative processes are reflected in their mineral assemblages. In this study particular attention is paid to solid solutions. Field and experimental evidence agree with theory as to the responses of ferromagnesian solid solution to compositional changes of the ...
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Petrogenesis of Archaean Tonalites
Geologische Rundschau, 1982The Archean tonalitic magma series is characterized by a high Al2O3 and Na2O content. Tertiary tonalites with similar major element composition have been generated in subduction zones. It is therefore suggested that the Archean tonalites was generated in relation to subduction zones, the primary magma of the series being of dioritic composition.
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V. Petrogenesis and discussion
Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1971Basaltic magmas are formed by partial melting of a source rock of peridotitic composition (pyrolite) under upper mantle conditions. Experimental studies of the mineralogy of pyrolite and the melting relations of various basaltic magmas under high-pressure conditions are integrated in an attempt to present an internally consistent model of ...
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International journal of earth sciences, 2020
A. Abdel-Karim, M. Azer, Mabrouk Sami
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A. Abdel-Karim, M. Azer, Mabrouk Sami
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