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Browsing ELibrary by Title
Now showing items 5221-5240 of 21936
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(1990)There exist several gravity and mechanical models of the continental crust that are useful in the study of the interaction between two lithospheric plates. We shall consider a three-dimensional model of the mechanical ...
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(1990)Bouguer gravity anomalies over the Tien Shan and Pamir are large and negative, and therefore consistent with crustal thickening beneath both mountain ranges. Gravity anomalies over the western Tien Shan are within about ...
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(1988)Vertical zoning in massive pyritic copper-zinc sulfide occurrences in the Urals, as expressed in the replacement from the bottom up of pyrite (sulfur) ore by chalcopyrite-pyrite (copper), sphalerite-chalcopyrite-pyrite ...
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(2002)Meteoroids captured by the Earth into orbits with perigees larger than the Earth's radius can graze the atmosphere and travel a long distance, from one to several thousand kilometers, at low altitudes. The dynamics of large ...
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(2004)Great earthquakes, the few largest earthquakes that account for most of the Earth's seismic energy release, have occurred at only a few subduction zones around the world. Strong locking, or 'seismic coupling', of the ...
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(1988)Geologists have repeatedly formulated ideas concerning great renewals of short duration in the Precambrian history of the Earth, i.e., colossal structural reorganizations, collapses, extensive inversions and changes in ...
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(2003)A new formulation of the Green element method (GEM), based on the transient Green's function of the diffusion differential operator, is herein used to solve the problem of transient flow in multiply layered aquifers that ...
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(2004)We examine the canonical source/Green's function separation problem in the context of teleseismic P wave scattering from receiver-side crust and upper mantle structure. Conventional “receiver function” analysis affords a ...
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(2004)We model the inner core by an alloy of iron and 8 per cent sulphur or silicon and the outer core by the same mix with an additional 8 per cent oxygen. This composition matches the densities of seismic model, Preliminary ...
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(1998)This paper presents the first results of an investigation of the ground-surface ruptures caused by a magnitude 7.0 earthquake and eruptions in the Karymsky volcanic center over the period January 1-2, 1996. The propagation ...
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(1998)Quantitative characteristics are provided for horizontal and vertical ground-surface deformation on Karymsky and Akademii Nauk volcanoes measured after a large (M = 7.0) earthquake and a swarm of smaller events in the ...
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(2002)Temperature–depth data from 14 deep boreholes, located in the Irkutsk amphitheater and Baikal rift zone in Eastern Siberia, have been used to infer ground surface temperature (GST) histories for the last 100 ka. The results ...
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(2004)Ground-penetrating radar (GPR, also referred to as ground-probing radar, surface-penetrating radar, subsurface radar, georadar or impulse radar) is a noninvasive geophysical technique that detects electrical discontinuities ...
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GROUNDING OF MONITORING THE STABILITY OF PILLARS AND ROOF AT MINES BY MEANS OF INFORMATION CRITERION (2001)Ways for improving the truth of seismic monitoring of roof state, rock thickness and pillar state have been considered. It has been shown that probability of correct identification of rock mass state can be improved by ...
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(2003)Both terrestrial and marine forces drive underground fluid flows in the coastal zone. Hydraulic gradients on land result in groundwater seepage near shore and may contribute to flows further out on the shelf from confined ...
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(2004)Groundwater inflow into the caverns constructed in fractured bedrock was simulated by numerical modeling: NAP-SAC (DFN, discrete fracture network model) and NAMMU (CPM, continuous porous media model), which is a finite-element ...
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GROUNDWATER HYDROCHEMISTRY IN THE ACTIVE LAYER OF THE PROGLACIAL ZONE, FINSTERWALDERBREEN, SVALBARD (2002)Glacial bulk meltwaters and active-layer groundwaters were sampled from the proglacial zone of Finsterwalderbreen during a single melt season in 1999, in order to determine the geochemical processes that maintain high ...
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(2001)An automatic system for groundwater level observations is described along with synchronous recordings of changes in groundwater level in wells and of atmospheric pressure made in 1996-1998 at two wells of the Petropavlovsk ...
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(2006)Excess N from agriculture induces eutrophication in major river systems and hypoxia in coastal waters throughout the world. Much of this N is from headwaters far up the watersheds. In turn, much of the N in these headwaters ...
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(2002)Since the mid-1980s, a relative explosion of groundwater-recharge studies has been reported in the literature. It is therefore relevant to assess what is now known and to offer further guidance to practitioners involved ...
Now showing items 5221-5240 of 21936