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Browsing ELibrary by Title
Now showing items 220-239 of 21936
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(2001)Two boreholes, BDP-96-1 (200 m thick) and BDP-96-2 (100 m thick), drilled at the top of the underwater Akademichesky Ridge at 53°41′48″N and 108°21′06″, gave two parallel cores which were dated paleomagnetically. The ...
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(2004)Sediment core ASV-987 from Russkaya Gavan’, a tidewater fjord on the northwestern coast of Novaya Zemlya, provides the first multicentury record of sedimentary and hydrographic glaciomarine environments in Russian Arctic ...
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(1997)A new emitter substance for lead isotope measurements consisting of a mixture of colloidal silicic acid and dilute phosphoric acid is described. With respect to the lead ion yield and the constancy of the ion beam this ...
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(1999)Continental flood basalts are widely thought to be produced from mantle plume heads. However, plume theories do not observe any role for lithospheric rifting before flood basalt events, and consider irrelevant the fact ...
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(2001)A hydrologic model is offered for a drainless lake in the crater of an active volcano based on the observation data derived in the crater lake of the Malyi Semyachik volcano. This model was used to calculate a number of ...
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(2001)The interpretation of seismic anisotropy in the mantle requires a knowledge of the relationship between the lattice preferred orientation (LPO) of crystals and the convective flow field. In order better to understand this ...
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(1997)Hydrous pyrolysis, performed at relatively low temperatures, of an immature marl yielded artificial maturation data on changes in homohopane isomer compositions. At higher temperatures enhanced amounts of 17α,21β(H)- and ...
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(2005)A quantitative kinetic model has been proposed to simulate the large D and 13C isotope enrichments observed in individual n-alkanes (C13–C21) during artificial thermal maturation of a North Sea crude oil under anhydrous, ...
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(1997)A model is derived for the isotopic fractionation between a mineral and a fluid phase in three dissolution-precipitation processes: the transformation of an unstable mineral into a stable one, and mineral-fluid mass transfer ...
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(2004)We use a kinetic model of a metamorphic system to study the effect of competing rates of reaction, fluid injection, and heating on the evolution of the reaction pathway in temperature/composition space at constant pressure. ...
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(1995)A laboratory investigation of viscous slabs subducted from a migrating trench reveals a range of possible behaviours. The slab dip in a uniform mantle is found to be steady or oscillatory, depending on the rates of descent ...
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(2003)We assume that tektites are produced by terrestrial impacts, either directly from the splashing of shock melt, or possibly as condensates from the impact vapor cloud. In either case, the final product is a fluid drop falling ...
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(1998)Measurements of split seismic shear-waves near Pacific subduction zones show that fast polarization directions are primarily trench-parallel in the seaward-side mantle beneath a subducting slab and variable in the mantle ...
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(2001)Following work by Stephen Taber 80years ago, we describe vein-like arrays of parallel, fibrous crystals that grow evaporatively between pairs of brine-soaked, porous ceramic substrates. Crystals of solute grow antitaxially ...
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(2001)Rotational and anhysteretic remanent magnetization (RRM and ARM) acquisition curves of two sediment samples containing greigite have been measured up to peak fields of 80 mT at rotation frequencies between 5 and 95 revolutions ...
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(1996)A technique is described whereby in situ carbon and oxygen isotope analyses of carbonates and organic phosphates can be made with the use of a CO2 laser. The CO2 gas generated by thermal decarbonation from the laser is ...
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(2002)Paleomagnetic, rock magnetic, and sedimentary micro-textural data from an early Miocene mudstone sequence exposed in Okhta River, Sakhalin, Russia, indicate the presence of pyrrhotite and magnetite at different stratigraphic ...
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(2003)Lead isotopes are compared in two equivalent diagrams. With a range in U/Pb, a closed system that evolved its radiogenic Pb in a single stage yields data that define a line of exactly the same age in the two presentations. ...
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(2003)The analysis of modal and normative composition of sedimentary rocks is widely used for studying their sources and tectonic settings. The normative calculation of the mineral composition of rocks in this study is formulated ...
Now showing items 220-239 of 21936