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Browsing ELibrary by Title
Now showing items 10581-10600 of 21768
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(2003)The Sm-Nd, Rb-Sr, and K-Ar isotopic systems were examined in Archean rocks and minerals of the Belomorian Belt, Kola Peninsula, subjected to regional metamorphism of the epidote-amphibolite facies. The Svecofennian ...
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(1990)Small clasts (SC's), generated by mechanical and other comminutive action on minerals, have many anomalous properties which justify treating them as a special aggregational state. Their anomalous character and variable ...
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(2002)Abstract— It has now been about a decade since the first demonstrations that hypervelocity particles could be captured, partially intact, in aerogel collectors. But the initial promise of a bonanza of partially-intact ...
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(1996)We report the results of SIMS isotopic analyses of carbon, nitrogen, oxygen, and silicon made on 849 small (~1 μm) individual silicon carbide grains from the Murchison meteorite. The isotopic compositions of the major ...
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(2001)Field work conducted in the northeastern Aral Sea Region, southwestern Kazakhstan has produced a large number of vertebrates from late Cretaceous and early Tertiary sediments. Included among these vertebrates are sharks, ...
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SMALL-ANGLE X-RAY SCATTERING MEASUREMENT OF THE INTERNAL MICROSTRUCTURE OF NATURAL ZIRCON CRYSTALS (2003)Zircon crystals change their physical properties significantly over time in response to the radiation damage (metamictization) induced in the lattice by the presence of radionuclides U and Th. Crystalline zircon has extremely ...
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(2003)A rapid small-scale method for the quantitative analysis of alkylphenols, alkylcarbazoles and benzocarbazoles from sedimentary matter is described using silica gel liquid chromatography and GC–MS techniques. Alkylphenol, ...
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(2003)Short-period waveform data recorded at the western US seismic array for 14 Mariana deep earthquakes near 19°N show two anomalous wave packets within about 30 s after the arrival of the direct P-wave (simply called 'P' or ...
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(2000)The oxygen isotopic composition of 6 xenoliths for which an origin between 310 to 450 km has been deduced was analyzed. An eclogite from Koidu, Sierra Leone, is composed of garnet with δ 18Ogt = 5.67‰ vs SMOW (standard ...
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(2003)The Volga delta differs from all other major deltas in the world by its extremely gentle onshore and offshore gradient (∼5 cm/km) and by being affected by the rapid sea-level changes of the Caspian Sea, at rates up to a ...
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(2001)The cross coherence function between log amplitude and phase (or travel time) has been analyzed along with the transverse coherence functions of log amplitude and phase in order to estimate the statistical dis-tribution ...
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(2004)The effect of a saline environment on illitization in volcanoclastic rocks is examined in deep boreholes in the East Slovak Basin. Based on X-ray diffraction analysis, it is concluded that illite-smectite (I–S) expandability ...
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(2002)This paper introduces a new 1-D inversion scheme for surface nuclear magnetic resonance (SNMR) amplitudes and decay times, using the optimized random search algorithm simulated annealing (SA). As an alternative to the ...
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(2003)Gamma ray detectors are used to measure the natural radioactivity of rocks. For a number of boreholes drilled at a site the gamma ray detector is lowered into each borehole and counts of gamma ray emissions at different ...
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(2002)Smyer is an H-chondrite impact-melt breccia containing ~20 vol% 0.5- to 13-mm-thick silicate-rich melt veins surrounding unmelted subrounded chondritic clasts up to 7 cm in maximum dimension. At the interface between some ...
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(2002)Compositional data are given for a suite of minerals present in a particularly PGM-rich ore from Noril'sk region, Russia. A characteristic association of altaite (PbTe) intergrown with sobolevskite (Pd(Bi,Te)) and taimyrite ...
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(2003)A systematic examination of metamorphic episyenites in the Pedriza Massif, Sierra de Guadarrama, Spain, allowed detection of two more distinct Li-rich C2/m amphibole species. They can be related to previously described ...
Now showing items 10581-10600 of 21768