Results 181 to 190 of about 1,808 (244)

Late Holocene fast-ice dynamics around the Northern Victoria Land coast, Antarctica. [PDF]

Nat Commun
Tesi T, Weber ME, Muschitiello F, Dutta D, Belt ST, Pambianco C, Di Roberto A, Silva L, Gariboldi K, Morigi C, Battaglia F, Colizza E, De Santis L, Gallerani A, Aulicino G, Langone L, Giordano P.   +16 more
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Symmetrization of Strong Hydrogen Bond under High Pressure in Bihydroxide-Ion-Containing NaCu₂(SO₄)₂·H₃O₂ Revealed by Experimental Charge Density, Single-Crystal Electron Diffraction, and Neutron Diffraction Studies. [PDF]

J Am Chem Soc
Rejnhardt P, Gajda R, Woińska M, Parafiniuk J, Giester G, Miletich R, Wu Y, Poręba T, Mezouar M, Sutuła S, Góral T, Dera P, Woźniak K.   +12 more
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ISOTOPE GEOCHEMISTRY AND PETROLOGY OF AFRICAN CARBONATITES

Physics and Chemistry of the Earth, 1975
The carbonatite bodies examined are the Palabora, Spitskop and Premier Mine carbonatites of Precambrian age, the Mbeya carbonatite of Mesozoic age, Tertiary Homa Mountain carbonatite and the Recent eruptions of the Oldoinyo Lengai carbonatite. The field of oxygen and carbon isotopic ratios of the Palabora carbonatite, especially of the older ...
By Kanenori Suwa, Shinya Oana, Hideki Wada, Susumu Osaki   +3 more
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Petrology and geochemistry of Antarctic micrometeorites

Geochimica et Cosmochimica Acta, 1994
Abstract The petrology and geochemistry of twentythree chondritic dust particles with masses of 1–47 μg (sizes 100–400 μm) were recovered from blue ice near Cap Prudhomme, Antarctica, and studied by INAA, ASEM, EMPA, and optical microscopy. Sample selection criteria were irregular shape and (for a subsample) black color, with the aim of studying as ...
Kurat, G., Koeberl, C., Presper, T., Brandstatter, F., Maurette, M.   +4 more
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Discovery tablemount basalt: Petrology and geochemistry

Contributions to Mineralogy and Petrology, 1974
Dredged porphyritic basalt from the Discovery Tablemount, South Atlantic Ocean, has been described and analysed, and the rare earths determined. The basalt is a quartznormative tholeiite but mineralogically and chemically (including trace elements) has affinities with alkali basalt; the pyroxene trend falls between those of alkali basalts and Hawaiian ...
Kempe, D. R. C., Schilling, J.-G.
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Petrology and geochemistry of Easter Island

Contributions to Mineralogy and Petrology, 1974
Easter Island has developed around three volcanoes—Poike, an older (3 m.y.) strato-volcano, Rano Kau, a caldera, and the fissure complex of Terevaka and its associated cones. The lavas show a wide compositional spread from tholeiites and olivine tholeiites to hawaiites, mugearites, benmoreites, trachytes and rhyolites (comendites).
Holland, J. G., Baker, P. E., Buckley, F.   +2 more
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Volcanology (including geochemistry and petrology)

Eos, Transactions American Geophysical Union, 1960
The International Association of Volcanology held Section meetings and Symposia each day of the Assembly.The Presidential address was delivered on the afternoon of July 26. Following the address, the Secretary's report was presented.
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Pallasite meteorites—mineralogy, petrology and geochemistry

Geochimica et Cosmochimica Acta, 1977
Pallasites are highly differentiated meteorites and provide a unique sample from the deep interiors of solar system parent bodies. They contain evidence of the former existence of one or more residual melts. Olivine is a major phase. Its primary shape is rounded; the angular crystals in many pallasites are secondary.
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Petrology and geochemistry of Shetland granites.

2023
This study is concerned with the distribution, age, chemistry and geotectonic setting of the 21 granites in Shetland. The granites range in size from a few metres to 8 Km across and in age from Pre-Moine to early Carboniferous. The granites occupy a unique position in being placed approximately half way between Scotland and Norway Caledonides and about
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Petrology and Geochemistry of Mercury

2019
Having knowledge of a terrestrial planet’s chemistry is fundamental to understanding the origin and composition of its rocks. Until recently, however, the geochemistry of Mercury—the Solar System’s innermost planet—was largely unconstrained. Without the availability of geological specimens from Mercury, studying the planet’s surface and bulk ...
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