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Browsing by Title
Now showing items 173-192 of 43490
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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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(PANGAEA, 2010-06-28)A 415cm thick permafrost peat section from the Verkhoyansk Mountains was radiocarbon-dated and studied using palaeobotanical and sedimentological approaches. Accumulation of organic-rich sediment commenced in a former oxbow ...
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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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(PANGAEA, 2020-06-25)Age models of M72/5 cores were constrained by 16 accelerator mass spectrometry (AMS) 14C dating in core M72/5-24GC3 (Nowaczyk et al., 2012), and by identifications of the Campanian Ignimbrite tephra at 39.3 ± 0.11 ka ('Y5', ...
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(2006)Klyuchevskoy is one of the most active volcanoes on Earth, erupting lavas at a rate of ∼1 m3/s, equivalent to a 50 km length of mid-ocean ridge. Bezymianny is located 20 km south of the summit vent of Klyuchevskoy and has ...
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(2007)Lavas from Klyuchevskoy and Bezymianny volcanoes, Kamchatka, appear to show a link between the extent of partial melting in their mantle source region and the subsequent degree of fractionation suffered by the magmas during ...
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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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(PANGAEA, 2006-09-15)Between 1999 and 2001, a 724 m long ice core was drilled on Akademii Nauk, the largest glacier on Severnaya Zemlya, Russian Arctic. The drilling site is located near the summit. The core is characterized by high melt-layer ...
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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 ...
Now showing items 173-192 of 43490