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Browsing ELibrary by Title
Now showing items 5094-5113 of 26297
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(2006)The island of Pantelleria consists of trachytes, pantellerites and minor mildly alkaline basalts. Rocks of intermediate composition (falling in the so-called 'Daly Gap') such as mugearites, benmoreites and mafic trachytes ...
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(2004)Until recently, the midmantle region of the Earth (the transition zone and the uppermost lower mantle) has been considered isotropic. Recent work by Wookey et al. [2002] presented evidence of anisotropy in the midmantle ...
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(2006)It is well known that rotational motions with annual and Chandler periods dominate in the dynamics of the location of the Earth’s poles. The nature of the Chandler wobble is not clear. It is most frequently attributed to ...
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EVIDENCE OF PRECURSOR PHENOMENA IN THE KOBE EARTHQUAKE OBTAINED FROM ATMOSPHERIC RADON CONCENTRATION (2006)Atmospheric 222Rn concentrations were determined over a 10a period, which included the date of the Kobe, Japan earthquake, on January 17th 1995. It was found that the seismically related 222Rn anomaly was higher than the ...
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(2006)Melt inclusions contained in plagioclase and olivine phenocrysts have been studied in tholeiitic basalts from the Shona ridge-centered hot spot region, South Atlantic Ocean. Two types of primitive melt inclusions exist ...
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(2006)Analysis of remote images, elevation surveys, stratigraphic cross-sections, and hydrocarbon production data demonstrates that extensive areas of wetland loss in the northern Gulf Coast region of the United States were ...
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(2004)Cathodoluminescence (CL) imaging of polished sections of a diamond from the Guaniamo region of Venezuela suggests a history of the diamond involving two periods of growth separated by a period of resorption and possibly ...
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(2003)Our study showed that anorthite-zoisite-spinel/magnetite-corundum pseudomorphs in coronites of the Kokchetav Massif developed after high-alumina clinopyroxene (tschermakite) (Ca,Fe,Mg Al2SiO6. This phase is stable only at ...
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(1989)Here we shall discuss new information on carbon and strontium isotopes in calcites and apatites of the Ust' Chul'man ore node. It shows that existing theories on the crustal source of Seligdar-type ore material are by no ...
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(1995)Ultraclean methods were used to produce reliable concentration data for the trace metals Pb, Ag, and Cd in fresh waters and for Pb, Ag, Cu, and Zn in estuarine waters. Partitioning of metals between filter-retained and ...
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(2003)Organic material in meteorites provides insight into the cosmochemistry of the early solar system. The distribution of polycyclic aromatic hydrocarbons (PAHs) in the Allende and Murchison carbonaceous chondrites was ...
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(2003)The way in which strands of uncertain volcanological evidence can be used for decision-making, and the weight that should be given them, is a problem requiring formulation in terms of the logical principles of Evidence ...
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(2006)Using high quality 3D seismic data within the Lower Congo Basin (LCB), we have identified pockmarks that are aligned above the sinuous belt of a buried turbiditic palaeo-channel, 1000 m beneath the seafloor. Geochemical ...
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(2001)The main evolutionary trends of the Tragulina are traced and the systematics and phylogeny of this taxon are revised based on the study of the comparative morphology of fossil and Recent species and on the estimation of ...
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(2006)The fossil record of wetlands documents unique and long-persistent fl oras and faunas with wetland habitats spawning or at least preserving novel evolutionary characteristics and, at other times, acting as refugia. In ...
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(2003)The data on the morphology, systematics, stratigraphy, and ecology of seymouriamorphs (Parareptilia) are revised. Cranial morphology of ten seymouriamorph species belonging to seven genera and three families from the Lower ...
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(2006)Two apparently distinct, sub-parallel, paleo-subduction zones can be recognized along the northern margin of the Tibetan Plateau: the North Qilian Suture Zone (oceanic-type) with ophiolitic mélanges and high-pressure ...
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(2006)The magmatic processes leading to porphyry-Cu mineralization at Santa Rita are reconstructed on the basis of petrographic studies, thermobarometry, and laser-ablation inductively-coupled-plasma mass-spectrometry analyses ...
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(1988)The principal features of the ore evolution process are traced by analysis of the conditions of generation of the Muruntau deposit. The ore genesis took place in the black shale Vendian-Lower Paleozoic association (Besapan ...
Now showing items 5094-5113 of 26297