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Browsing ELibrary by Title
Now showing items 104-123 of 26297
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(2002)A possible mesosiderite meteorite was found in the area of the Putorana Plateau, Noril'sk district, Siberia, Russia. Although this rock resembles a mesosiderite in its hand-sample aspect and in having Ni-bearing iron metal, ...
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(1996)Continental records of Plio-Pleistocene climatic fluctuations are often confined to fragmentary, localized basins, and not easily dated. One exception is the Confidence Hills of Southern Death Valley. In this study, we ...
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(2006)A 1000-yr record of forest fire activity has been developed using three annually dated ice cores from Eclipse Icefield, Yukon, Canada. Forest fire signals were identified as NH4+ residuals above a robust spline and ...
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(2006)The purpose of our work is to refine the age of the Holocene polygonal ice wedge complex in Terrace 1 of the Chara River, plot an isotope diagram, which allows one to reconstruct winter temperatures of the period of ice-wedge ...
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A 164 KA RECORD OF ENVIRONMENTAL CHANGE IN THE AMERICAN SOUTHWEST FROM A CARLSBAD CAVERN SPELEOTHEM (2006)A horizontal core 2.8 m in length drilled from the Georgia Giant column in Carlsbad Cavern provides climate information for the last 164 ka. Forty-six alpha spectrometric U-series ages determined at intervals of ~ 7.6 cm ...
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(2001)The Kolvitsa Belt in the south-western Kola Peninsula formed coeval with the earliest Palaeoproterozoic rift-belts in the Fennoscandian Shield. The Palaeoproterozoic history of this belt comprises the deposition of the ...
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(2006)After 11.5ka of quiescence (24.5-13ka), the Nevado de Toluca volcano started a 2500 year period of activity. This period was characterized by a dome destruction event at 13ka, a small Plinian event at 12.1ka, and a large ...
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(1997)The reconstruction of geomagnetic field intensity variations during the last 200 kyr from paleomagnetic data is at present the subject of numerous studies and major debate. There is currently no generally accepted record. ...
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(2006)Paleoseismologic trenches excavated across the North Anatolian fault near the village of Çukurçimen in north-central Turkey yield a complete record of surface ruptures for the past 2500 yr. The trenches provide mutually ...
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(2006)A 3-D density model for the Cretan and Libyan Seas and Crete was developed by gravity modelling constrained by five 2-D seismic lines. Velocity values of these cross-sections were used to obtain the initial densities using ...
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(2003)An accurate and efficient 3-D finite-element (FE) forward algorithm for DC resistivity modelling is developed. First, the total potential is decomposed into the primary potential caused by the source current and the secondary ...
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(1995)Three-dimensional (3-D) numerical modelling in a rectangular box is provided for the evolution of mantle structure induced by two floating continents. As initial state we take quasi-steady state mantle convection with many ...
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(2000)Acid volatile sulfur extracted from ureilite meteorites carries a small 33S enrichment relative to carbonaceous chondrites, enstatite chondrites, ordinary chondrites, and troilite from iron meteorites: Δ33S (=δ33S - 1,000 ...
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(2002)A high resolution, cross-borehole, 3D electrical resistivity tomography (ERT) study of solute transport was conducted in a large experimental tank. ERT voxels comprising the time sequence of electrical images were converted ...
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(2006)We develop a parametric inversion algorithm to determine simultaneously the horizontal and vertical resistivities of both the formation and invasion zones, invasion radius, bed boundary upper location and thickness, and ...
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(2006)Magmatism in the Gardar Province, South Greenland, is related to two main rifting events at 1280 Ma and 1180 to 1140 Ma. Little is known about the duration of the magmatic activity in a specific complex. The Ilímaussaq ...
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(1986)New barometer based on the equilibrium: CaFe 2 Al 2 Si 3 O 12+2 \hspace{0.17em} TiO 2=2 \hspace{0.17em} FeTiO 3+ CaAl 2 Si 2 O 8+ SiO 2 garnet ( Gr 1 Alm 2) \hspace{0.17em} rutile \hspace{0.17em} Ilmeoite \hspace{0.17em} ...
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(2002)We introduce a dynamic linear model in which the observation equations are perturbed by a form that has constant (over time), non-random coefficients and may represent the disturbing gravity field under investigation. ...
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(2006)We present a new approach for modelling annealing of fission tracks in apatite, aiming to address various problems with existing models. We cast the model in a fully Bayesian context, which allows us explicitly to deal ...
Now showing items 104-123 of 26297