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Геология России: Recent submissions
Now showing items 1381-1400 of 43490
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(2006)We present shear velocity anisotropy data from crustal earthquakes in California and demonstrate that it is often possible to discriminate structural anisotropy (polarization of the shear waves along the fabric of major ...
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(2006)Inspired by recent ray-theoretical developments, the theory of normal-incidence rays is generalized to accommodate P- and S-waves in layered isotropic and anisotropic media. The calculation of the three main factors ...
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(2006)The major element composition of plagioclase, pyroxene, olivine, and magnetite, and whole-rock 87Sr/86Sr data are presented for the uppermost 2.1 km of the layered mafic rocks (upper Main Zone and Upper Zone) at Bierkraal ...
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(2006)Morphology and sedimentation on the Pine Island Bay continental margin, eastern Amundsen Sea, is investigated using swath bathymetry, parametric subbottom profiler (TOPAS) records, and sediment cores. A major cross-shelf ...
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(2006)Holocene volcanoes in the Philippines and Indonesia were studied to determine the possible relationship between the regional maximum horizontal stress (σHmax) and the opening direction of volcanic amphitheatre craters. The ...
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(2006)We have investigated the native amino acid composition of two analogs of Martian soil, JSC Mars-1 and Salten Skov. A Mars simulation chamber has been built and used to expose samples of these analogs to temperature and ...
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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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(2006)A fault model is used to analyse creep growth process of microcracks in damage zone near the tips of fault by means of the rheology fracture mechanics. When microcracks in the zone link each other and their deformation ...
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(2006)Retrograded eclogites from the central part of the northern margin of the North China Craton, Hebei Province, China occur as separate tectonic lenses or boundins within garnet-biotite-plagioclase gneisses of the Paleoproterozoic ...
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(2006)The termination of the penultimate glacial period (TII) shows both similarities and differences to the last termination (TI). Both terminations show significant cold reversals in the postglacial warming trend. TI consists ...
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(2006)The thermal and shock histories of ureilites can be divided into four periods: 1) formation, 2) intial shock, 3) post-shock annealing, and 4) post-annealing shock. Period 1 occurred ~4.55 Ga ago when ureilites formed by ...
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(2006)We studied the brittle deformational history of the Okanagan metamorphic core complex, and its hanging wall carapace, in the Canadian Cordillera, in southern British Columbia by an extensive structural investigation at ...
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(2006)Structural investigations, integrated with X-ray diffraction, fluid inclusion microthermometry and oxygen-stable isotope analyses are used to reconstruct the deformation history and the palaeo-fluid circulation during ...
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(2006)Velocity heterogeneity and seismic anisotropy in the D" region beneath the southern Pacific Ocean is investigated using broadband shear waves from southwest Pacific and South American earthquakes recorded by permanent and ...
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(2006)Plio-Pleistocene volcanism in the Golan and Galilee (northeastern Israel) shows systematic variability with time and location: alkali basalts were erupted in the south during the Early Pliocene, whereas enriched basanitic ...
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(2006)Scattering of wavefields in a 3-D medium that includes passive and/or active structures, is numerically solved by using the boundary integral equation method (BIEM). The passive structures are velocity anomalies that ...
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(2006)Ab initio quantum mechanical calculations show that xenon (Xe) can be alloyed with hexagonal close-packed iron at high pressure through substitutional incorporation, with a favorable enthalpy of formation for the alloy ...
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(2006)Petrological, geochemical, and Nd isotopic analyses have been carried out on rock samples from the Rainbow vent field to assess the evolution of the hydrothermal system. The Rainbow vent field is an ultramafic-hosted ...
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(2006)We use the spatial autocorrelation (SPAC) method with improved inversion algorithms to estimate the Love and Rayleigh dispersion curves at two sites at the West and Northeast flanks of Arenal volcano, Costa Rica. At the ...
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(2006)The goal of this paper is to describe how continuous gravity measurements can improve the geophysical monitoring of a volcano. Here the experience of 15 yr in continuous gravity on Vesuvius is presented. A wide set of ...
Now showing items 1381-1400 of 43490