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Now showing items 15665-15684 of 39126
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(2002)Experimental studies were carried out to evaluate phase relations involving titanite–F–Al-titanite solid solution in the system CaSiO3–Al2SiO5–TiO2–CaF2. The experiments were conducted at 900–1000°C and 1·1–4·0 GPa. The ...
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(2009)A collection of ammonites of the genus Amoeboceras located carefully in the section of Nordvik Peninsula in northern Siberia has enabled recognition of the standard Boreal ammonite zones of the Upper Oxfordian ...
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(2002)The solubility of sulfur as S2– has been experimentally determined for 19 silicate melt compositions in the system CaO–MgO–Al2O3–SiO2(CMAS) ± TiO2 ± FeO, at 1400°C and 1 bar, using CO–CO2–SO2 gas mixtures to vary oxygen ...
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(2001)The Carboniferous δ34S record, based on the analysis of structurally substituted sulphate (SSS) in brachiopod shells, is characterized by a significant decline from values around +21±1‰ in the Tournaisian to +12±1‰ in the ...
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(2002)Midsummer (July) temperatures are reconstructed for the last 7500 years using the long ring-width chronology of Scots pine (Pinus sylvestris L.) from northern Finland. The chronology was built using regional curve ...
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(1997)The surfaces of fresh albite crystals, and of albite crystals following their two hour leaching in an aqueous 0.3 molal HCl solution at a temperature of 200°C, were analyzed by Raman spectroscopy, scanning electron microscopy, ...
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The surface energy balance of a polygonal tundra site in northern Siberia – Part 1: Spring to fall. (PANGAEA, 2012-09-26)In this article, we present a study on the surface energy balance of a polygonal tundra landscape in northeast Siberia. The study was performed during half-year periods from April to September in each of 2007 and 2008. The ...
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(PANGAEA, 2012-09-26)In this study, we present the winter time surface energy balance at a polygonal tundra site in northern Siberia based on independent measurements of the net radiation, the sensible heat flux and the ground heat flux from ...
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(1999)Aluminum-rich titanites [Ca(Ti,Al)(O,F)SiO 4 ] with XAl>0.53 [XAl = Al/(Al+Ti)], including the pure end-member CaAlFSiO 4 , were synthesized for the first time in a high-pressure experimental study. The crystal structure ...
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(2000)New experimental data in CaO-MgO-SiO2-CO2 at 1 GPa define the vapor-saturated silicate-carbonate liquidus field boundary involving primary minerals calcite, forsterite and diopside. The eutectic reaction for melting of ...
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(1998)Postulated fluid-fluid immiscibility of 50-50% CO2-N2 mixtures has been checked by high-pressure experiments (<5 gpa; <400 k) and could be rejected. the implications for interpretation of high-density fluid inclusions (<42 ...
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(2002)The system Fe–Pt–S at 1100°C contains four alloys, γ(Fe,Pt), PtFe, Pt3Fe and γ (Pt, Fe), with respective miscibility-gaps at 43.5–45.5 at.% Pt, 57.7–60.4 at.% Pt and 77–80 at.% Pt, two sulfide phases, Fe1− x S (maximum Pt ...
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(2002)The condensed phase system Fe-Rh-S was studied by means of dry syntheses at 900 and 500°C. At 900°C. there are fields of γ(Fe,Rh) with up to 29.7 at % Rh. α(Fe,Rh) with 40-50.4 at% Rh and γ(Rh,Fe) between o and 34.3 at.% ...
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(2003)New experimental data are presented on the partitioning of Cr and Al between spinel-picrochromite and corundumeskolaite solid solutions at 5.0 GPa and 1300, 1500degreesC and garnet-spinel-orthopyroxene equilibria at 3.0 ...
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(1991)The H2O and H2 solubilities in an albite melt at 1200° C and 2 kbar over the entire range of gas phase composition, from pure hydrogen to pure water were studied in gas-media pressure vessels. The water solubility initially ...
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(1998)New heat of mixing and heat of dilution data are presented for the system {NaCl+CaCl2}(aq) at 373, 423, 473, 523, and 573 K and 21.5 MPa. At each temperature heat of mixing measurements were made over an ionic strength ...
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(Федеральное государственное автономное образовательное учреждение высшего образования «Дальневосточный федеральный университет», 2013)Phenomena of anomalous deformation of rocks compressed up to failure have been studied in the laboratory on rock samples. A system of reliable deformational precursors of the failure stage has been developed. The system ...
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(2002)Results of experimental investigations in the dry system PtS-PdS-NiS between 1200° and 700°C are presented. The phases encountered in the experimental runs are synthetic cooperite (( Pt,Pd,Ni)S), synthetic braggite (( ...
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(2002)Late Precambrian and Palaeozoic platform sediments from the Central – South Taimyr Peninsula (Arctic Siberia) are all remagnetised. The remagnetisation is prefold and is related to thermal remagnetisation caused by Taimyr ...
Now showing items 15665-15684 of 39126