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Browsing ELibrary by Title
Now showing items 6837-6856 of 21936
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(2000)Results from doped, hydrous experiments on natural mafic-to intermediate-composition lavas at 2-5 kbar pressure were combined with existing 1 atm data to evaluate the effects of composition and temperature on the partitioning ...
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(2004)We have studied the high-field magnetization (up to 14.5 T) and magnetic susceptibility in the temperature range 1.7 -420 K of two samples of jadeite (NaAlSi2O6), white and green, containing transition metal ions and ...
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(2003)New environmental magnetic data from loess and paleosol successions in outcrops in the upper reaches of the Ob River drainage, southern Siberia, track the major climatic variations over the last glacial-interglacial cycle. ...
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(1996)A multidisciplinary approach involving rock-magnetics, transmission electron microscopy, and X-ray diffraction was used to identify a biogenic magnetite component in the Lake Baikal, Siberia, sedimentary magnetic record. ...
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(2002)A 12.7 m long sedimentary record recovered from Lake El'gygytgyn, located in a meteorite impact crater created 3.6 Ma in Late Cretaceous igneous rocks on Chukotka Peninsula, northeast Siberia, has been analysed for its ...
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(1998)A geomagnetic excursion is detected and studied in detail in the loess-soil sequence of the upper Don River basin. This event, termed as the Log Krasnyi excursion, happened about 600 ka ago. Characteristic features of this ...
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(2002)Seven lithological units, alternating between horizons enriched in biogenic opal (diatoms) and carbonate (foraminifera) and units composed largely of terrigenous sediment with very low biogenic admixture, were distinguished ...
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(1984)Four sedimentary sections seen in continuous exposures along the Lena River on the Siberian Platform in Yakutia contain a record of the geomagnetic field during the Tommotian and Atdabanian stages of Early Cambrian time. ...
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(2003)A new robust magnetotelluric (MT) data processing algorithm is described, involving Siegel estimation on the basis of a repeated median (RM) algorithm for maximum protection against the influence of outliers and large ...
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(1999)An interpretation of an E-W profile of 30 magnetotelluric field stations along the URSEIS transect is presented. The magnetotelluric instruments used covered a period range from 0.2 to approximately 500 s and thus enabled ...
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(1999)Some 1000 MT soundings at the Petropavlovsk Geodynamic Test Site were analyzed. The curves were classified by directions along and across the major structural zones. The longitudinal and transverse MT curves were found to ...
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(2002)The nature and magnitude of climatic variability during the period of middle Pliocene warmth (ca 3.29–2.97 Ma) is poorly understood. We present a suite of palaeoclimate modelling experiments incorporating an advanced ...
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(2001)Posidoniids (Mollusca, Bivalvia) from the Ladinian of Northeastern Asia are revised. A new genus Magnolobia with the type species Daonella prima Kiparisova, 1946 is established. New morphological structures are revealed, ...
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(2003)In addition to molybdenite, tungstenite, and iordisit, complex sulfides of Mo and W (hemusite, kiddcreekite, castanite, Mo- and W-containing colusite, Ge-colusIte, and germanite) have been detected in hydrothermal ores. ...
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(2002)Regularities in the distribution of apatites and apatite-bearing igneous rocks are compared with phosphorite-accumulation epochs. It is shown that periods of maximal phosphate accumulation result from erosion and weathering ...
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MAIN CONCEPTS OF THE "EUROPEAN APPROACH" TO KARST-GROUNDWATER-VULNERABILITY ASSESSMENT AND MAPPING (2002)In order to achieve some consistency in the establishment of groundwater intrinsic vulnerability maps in Europe, a new approach is proposed by Working Group 1 of the European COST Action 620 on "Vulnerability mapping for ...
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(2001)The mineral resources of Russia grew with the territorial expansion of the country; new frontiers gave Russia access to new mineral sources, which enhanced the independence of the Russian economy. The exposition devoted ...
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(1980)The Early Precambrian of the U.S.S.R. in the time span∼3500-1650m.y. ago (Archaean and Early Proterozoic) is characterized by typical supracrustal sequences of the Baltic Shield in Europe and the Aldan Shield in Asia. In ...
Now showing items 6837-6856 of 21936