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Browsing ELibrary by Title
Now showing items 8619-8638 of 21768
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(2004)The Saramta massif in the Paleoproterozoic Sharyzhalgai complex, the southwestern margin of the Siberian craton, is mainly composed of spinel-peridotites with garnet-websterites; it is enclosed within granitic gneisses and ...
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(2000)Two metamorphic zones are identified in strongly deformed mica schists from the 1.9 Ga Korva Tundra Group of the Tanaelv belt: (1) a chlorite-staurolite zone tectonically overlaying gneisses of the Karelian craton, and (2) ...
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(1999)We report new experimental results obtained under nominally anhydrous conditions at 1.0-1.5 GPa on a synthetic melt whose composition is typical of extreme-composition xenolith glasses. These results demonstrate that part ...
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(1997)High-pressure liquidus experiments on three silicic, aluminous, alkaline melts, modelled on glasses found in many mantle xenoliths, show that part of this compositional range is saturated with harzburgite (or possibly ...
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(2000)The stability of members of the lazulite-scorzalite solid-solution series, (Mg,Fe)Al2 (OH)2(PO4)2, was investigated as a function of T (505 to 675 °C), P (0.1 to 0.3 GPa) and Fe/Mg ratio in hydrothermal synthesis experiments. ...
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P-T-T-DEFORMATION-FLUID CHARACTERISTICS OF LODE GOLD DEPOSITS: EVIDENCE FROM ALTERATION SYSTEMATICS (1998)Structurally hosted lode gold-bearing quartz vein systems in metamorphic terranes possess many characteristics in common, spatially and through time; they constitute a single class of epigenetic precious metal deposit, ...
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(2000)The P21/c clinopyroxene kanoite (ideally MnMgSi2O6) was studied as a function of pressure and temperature using powder X-ray diffraction, differential scanning calorimetry (DSC) and optical methods. The temperature of the ...
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(1990)Long-range controlled source seismic experiments yield detailed information about the velocity depth structure of the lower lithosphere. Between Ireland and Northern Britain three such profiles sample almost the same portion ...
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(2003)We compare the P-wave velocities (Vp) of 696 dry samples measured at pressures up to 0.6–1.0 GPa with values calculated from the volume fraction and room pressure elastic constants of each constituent mineral using 16 ...
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(2001)New biostratigraphic data based on radiolarians recovered from deep within the oceanic crustal section of Ocean Drilling Program Hole 801C in the western Pacific, along with existing radiometric information, date this ...
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(1996)Previous studies have shown that the Pacific geoid and gravity fields exhibit lineated anomalies, trending approximately in the direction of absolute plate motion over the underlying mantle. Because the undulations obliquely ...
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(2003)The computer package FLUIDS contains five sets of computer programs written in C++ for the calculation of fluid properties. Both model fluids and data from fluid inclusions can be analysed in the programs. Bulk density, ...
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(2006)Rastsvetaevite was found on Mt. Rasvumchorr (Khibiny alkaline massif, Kola peninsula) occurring in a hyperagpaitic pegmatite as irregularly shaped grains 1-2 mm in size and their aggregates, up to 2 cm across. It is ...
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(2004)Palaeogeography (specifically palaeotopography and palaeobathymetry) provides an essential boundary condition for computer-based atmosphere and ocean modelling. It also provides the geographic context for understanding ...
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(2002)A study of clay mineral and calcareous nannofossil abundances in late Jurassic–early Cretaceous sediments from the Volga Basin, SE Russia, is presented. From these results, we are able to compare some general patterns of ...
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(1989)While studying acritarchs from the Rudnyy Altay, we the authors discovered one cyst of a dinophyte alga whose structure provides evidence for its taxonomic membership in the order Dinophysiales. Morphologically, the cyst ...
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(2003)Marine organisms have occupied hard substrates since the Archaean. Shells, rocks, wood and sedimentary hardgrounds offer relatively stable habitats compared to unconsolidated sediments, but the plants and animals which ...
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(2002)The Grebenka flora, from the main exposure of the Albian–Cenomanian Krivorechenskaya Formation in northeastern Russia, represents a range of plant communities from pioneer to mature forest that grew close to the mid-Cretaceous ...
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(2003)Southward drifting of the western Gondwanan margin during the Cambrian has been demonstrated by means of both palaeomagnetic methods and lithological indicators of climate (such as carbonates and evaporites). Recent ...
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(2001)Yezupil is the first Middle Palaeolithic site discovered in upper part of the Dnister River valley. It is situated in a set of sediments composed of loess and fossil soils lying on alluvia. The results of geological and ...
Now showing items 8619-8638 of 21768