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Browsing ELibrary by Title
Now showing items 11166-11185 of 21934
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(2004)It is well known that the permeability of a set of joints can significantly vary in response to in situ stress conditions and pressure of the flowing fluid. Frequently, joint sets are closely spaced, and although joint ...
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(2004)In situ stress monitoring of crustal rocks is desirable as it yields insights into earthquake mechanisms, volcanic eruptions and changes in hydrocarbon reservoirs. Shear wave splitting, induced by stress-controlled cracks ...
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STRESSED STATE AND DESTRUCTION OF CONTACTS BETWEEN SEAM AND THE ENCLOSING ROCKS DURING WORK AT STOPE (2001)Particularities in concentration of normal and tangential stresses at boundaries between the enclosing rocks and seam during its mining have been considered. Mathematical models describing parameters of zone of support ...
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(2004)We employ an axisymmetric spherical shell model of mantle convection to examine the magnitude of deviatoric tensile stresses generated in a stationary continental plate resulting from the subduction of oceanic plate material ...
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(2004)Analysis of specificity of folded structure of the unique Udokan deposit showed that disjunctive ruptures as witnesses of ore-localization medium activity in many aspects determined its enhanced ore-bearing potential. The ...
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(1990)The new data presented indicate the need to revisit the estimates of the estimates of the earthquake potential of the Oka-Zhombolok fault zone, and improve seismic zoning maps for the eastern Sayan region. The indication ...
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(2003)The SW Baltic Sea occupies an area where crustal-scale regional tectonic zones of different age merge and overlap, creating a complex tectonic pattern. This pattern influenced the evolution of the Mesozoic sedimentary basin ...
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(1999)Stromatolites are attached, lithified sedimentary growth structures, accretionary away from a point or limited surface of initiation. Though the accretion process is commonly regarded to result from the sediment trapping ...
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(2002)Methane seepage leads to Mg-calcite and aragonite precipitation at a depth of 4,850 m on the Aleutian accretionary margin. Stromatolitic and oncoid growth structures imply encrustation of microorganisms (microbial mats) ...
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(2003)High-frequency (sub-Milankovitch) signals have occasionally been recognised in the sedimentary record but their interpretation is yet controversial. The transmission of most information involves modulating the original ...
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(2003)In the absence of sufficient data in the very near source, predictions of the intensity and variability of ground motions from future large earthquakes depend strongly on our ability to develop realistic models of the ...
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(2003)We report strong magnetic linear dichroism (MLD) at the Fe L23 and O K edges of the antiferromagnetic compound hematite α-Fe2 O3 in high-resolution orientation- and temperature-dependent electron energy-loss spectroscopy ...
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(2000)Minor and trace element analyses of fish otoliths (ear stones) may provide a high-resolution reconstruction of temperature histories and trace element compositions of aquatic systems where other environmental proxies are ...
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(1996)Strontium chemical diffusion has been measured in albite and sanidine under dry, 1 atm, and QFM buffered conditions. Strontium oxide-aluminosilicate powdered sources were used to introduce the diffusant and Rutherford ...
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(2001)Sea surface temperatures (SSTs) have been inferred previously from the Sr/Ca ratios of coral aragonite. However, microanalytical studies have indicated that Sr in some coral skeletons is more heterogeneously distributed ...
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(2003)Aragonite was analyzed from Porites lobata, Pavona gigantea, Pavona clavus, and Montastrea annularis corals by Sr K-edge extended absorption X-ray fine structure (EXAFS) and compared with aragonite, strontianite, and ...
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(2003)We have used X-ray Diffraction (XRD) and Sr K-edge Extended X-ray Absorption Fine Structure (EXAFS) to determine the structural state of Sr in a suite of coral aragonite samples. Our samples encompassed a selection of coral ...
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(2005)Use of the coral Sr palaeothermometer assumes that the Sr in coral skeletons is substituted randomly for Ca in the aragonite structure. The presence of Sr in additional phases e.g., strontianite, or the non random distribution ...
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(2004)Strontium incorporation into calcite generated by bacterial ureolysis was investigated as part of an assessment of a proposed remediation approach for 90Sr contamination in groundwater. Urea hydrolysis produces ammonium ...
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(2000)We profile 87Sr/86Sr, δ13C, δ18O, Sr/Ca, Mg/Ca, and Na/Ca in belemnites through Pliensbachian and Toarcian strata on the Yorkshire coast, UK, which include the early Jurassic oceanic anoxic event. The 87Sr/86Sr profile ...
Now showing items 11166-11185 of 21934