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Now showing items 7635-7654 of 39124
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(2001)Salinization of water resources is one the most widespread processes that degrades water-quality and endangers future water exploitation. In many areas, particularly in arid and semi-arid zones, ground-water salinization ...
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(PANGAEA, 2013-06-13)Zircons from the oldest magmatic and metasedimentary rocks in the Podolia domain of the Ukrainian shield were studied and dated by the U-Pb method on a NORDSIM secondary-ion mass spectrometer. Age of zircon cores in enderbite ...
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(1998)Experiments were performed to test the viability of using isotope-ratio-monitoring gas-chromatography mass spectrometry (irm-GCMS) as a means for isotopic analysis of nanomole quantities of O2 released in a vacuum system ...
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(2001)Isotopic dating showed that rhyolites of the Kushmurun graben are divisible into two groups different in age. One group is close to the Induan-Olenekian boundary in its chronostratigraphic position and has K-Ar and Rb-Sr ...
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(2003)A possible source of moisture for the ground ice was determined from the sulfur and carbon isotopic tests of meltwater. The starting material for the investigation was collected in 1998-2000 from four tabular ground ice ...
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(1999)We report elemental and isotopic analyses of Fe, Ni, and Cr in type I deep-sea spherules with masses ranging from 43 to 256 μg. We measured (1) the isotopic compositions of Fe and Cr by thermal ionization mass spectrometry; ...
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(1996)Pristine conodonts (CAI =< 1.5), inarticulate brachiopods, and conulariids, all from a single hand sample of Ordovician limestone, define a co-varying trend of 87Sr/86Sr and Sr concentration. Most of the apatitic fossils ...
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(1987)The Dauletabad-Donmez gas field is in the southern part of the Amu Dar'ya oil and gas province. The identification of the origin and sources of H2S in gases of the Dauletabad-Donmez field is very important, particularly ...
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(2019-01)The Kamchatka Peninsula of eastern Russia is currently one of the most volcanically active areas on Earth where a combination of > 8 cm/yr subduction convergence rate and thick continental crust generates large silicic ...
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(1993)We present a tightly controlled and comprehensive set of analytical data for the 250-Ma Siberian flood-basalt province. Consideration of major- and trace-element compositions, along with strontium, lead and neodymium ...
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(2001)The ocean accounts for over 90% of the active pools of carbon on the Earth’s surface, with over 95% of marine carbon in the form of dissolved inorganic carbon (DIC) (Hedges and Keil 1995). Organic carbon dissolved in the ...
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(2004)Spatial and structural association of ultramafic alkaline massifs of the Krasnyi Mai Complex with fault-related blastomylonite zones containing graphite and fine-dispersed diamonds requires special attention.
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(2004)Paleo-reconstruction of one new-Caspian transgression stage was carried out on the base of analysis of oxygen and carbon stable isotopes' content as well as of some metals in bivalve mollusk shells. Dynamics of δ18C values ...
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(1988)The contents of the inclusions were determined in a device that used mechanical grinding. A mortar and pestle joined by a bellows were connected directly to a vacuum system that included traps cooled with a mixture of dry ...
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(2004)Carbon isotope data have been obtained for diamonds in diamondites (framesites, polycrystalline diamond) of unknown origin (presumably from southern Africa), which contain minor amounts of garnet (plus rare clinopyroxene). ...
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(1990)The isotopic composition of carbon in oils and condensates of the Chukotka Peninsula was studied in samples taken from wells on the verkhne-Tekelay, Verkhne-Echinskaya, and Izmennaya tracts, located in the southern part ...
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(1997)Isotopic composition of Sr, O, Nd, and Pb was determined in K-Na alkaline gabbroids and basaltoids that formed in eastern Kamchatka during Middle Miocene (gabbroids of the subvolcanic complex) and Late Miocene (basaltoids ...
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(1996)An acid residue from the Dhajala meteorite which carries the noble gas component of the pure Q-phase, has been analyzed for nitrogen and noble gases by step-wise heating pyrolysis. From Ne data we derive (20)Q = 10.48 +/- ...
Now showing items 7635-7654 of 39124