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Browsing Геология России by Title
Now showing items 2135-2154 of 39124
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(2000)We report experimental data of bubble growth in natural rhyolitic melt with 1.4-2.0 wt% initial total H2O at 0.1 MPa and 500-600°C. Growth of many bubbles is monitored in every experiment. Bubble growth rate increases with ...
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(1996)Bubble growth controlled by mass transfer of water from hydrated rhyolitic melts at high pressures and temperatures was studied experimentally and simulated numerically. Rhyolitic melts were hydrated at 150 MPa, 780-850 ...
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(2001)CO2 is relatively insoluble in basaltic magma at low crustal pressures. It therefore exists as a gas phase in the form of bubbles in shallow crustal reservoirs. Over time these bubbles may separate gravitationally from the ...
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(2005)It is the great challenge of geomicrobiology to study microorganisms in the context of their environments, both in Earth’s distant past and in the present. Planet Earth and its biosphere have evolved together, and a chronicle ...
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(2003)Paired apatite fission track and U-Th/He dates provide the first Late Cenozoic cooling ages for the northern Tien Shan. These data clearly argue for pulsed deformation since the Late Miocene, with early (11–10 Ma) and late ...
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(2003)The Pamir mountains are an outstanding example of extreme crustal shortening during continental collision that may have been accommodated by formation of a thick crust-much thicker than is currently thought-and/or by ...
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(2001)Creep experiments have been conducted to investigate the effect of varying forsterite content (VFo) on the bulk flow strength of dry forsterite-enstatite (Fo-En) aggregates in order to evaluate the applicability of existing ...
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(PANGAEA, 1997-09-05)
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(2001)Bulk mineralogy of individual fine-grained micrometeorites from 50 to 200 μm in diameter was determined on the basis of the powder X-ray diffraction patterns and the observation of internal textures by a transmission ...
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(2003)We report the pressure dependence of the crystal structure of lead tetroxide (p ≤ 41.05 GPa, T = 298 K) using high-resolution angle-dispersive X-ray powder diffraction. Pb3O4 shows two reversible phase transitions in the ...
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(2004)This paper presents the first comprehensive major and trace element data for $130 abyssal peridotite samples from the Pacific and Indian ocean ridge–transform systems. The data reveal important features about the petrogenesis ...
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(2003)The paper presents an examination and interpretation of petrogeochemical data on the basis of the phase composition of cumulates. A new structural scheme of the Layered Series of the massif is proposed. The Layered Series ...
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(2002)The 370–380 Ma Khibina and Vuoriyarvi complexes on the Kola Peninsula, Russia, which form part of the Palaeozoic Kola Alkaline Province, contain REE-rich carbonatites with burbankite (Na,Ca)3(Sr,Ca,REE,Ba)3(CO3)5 or ...
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(1999)Burbankite, ideally (Na,Ca) 3(Sr,REE,Ba)3(CO3)5, is a rare REE carbonate mineral that until now had been encountered only at a few localities including highly alkaline silicate rocks, carbonatites, and lacustrine sediments. ...
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(2004)The GALO system is applied to the numerical reconstruction of burial and thermal histories of the West Bashkirian lithosphere from the Riphean to the present. An analysis of the variation in tectonic subsidence of the basin ...
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(2001)The morphology of the gravity field and the distribution of Pliocene ignimbrites were analyzed to locate Late Neogene calderas which had been covered by younger volcanic formations.
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(2002)Burnsite, ideally KCdCu7O2(SeO3)(2)Cl-9, occurs in a fumarole in the North Breach of the great fissure Tolbachik volcano eruption (1975-1976), Kamchatka Peninsula, Russia. It occurs as dark red, anhedral, equidimensional ...
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(2000)Рассматриваются закономерности распределения взвеси и ряда химических элементов в эстуариях Оби и Енисея. Приведены данные по вещественному гранулометрическому и химическому составу взвесей (Сорг, Si, Al, Са, Fe, Mn, Ti, ...
Now showing items 2135-2154 of 39124