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Pressure stimulated currents in rocks and their correlation with mechanical properties
Pressure stimulated currents rocks correlation mechanical properties
2009/12/14
The spontaneous electrification of marble samples was studied while they were subjected to uniaxial stress. The Pressure Stimulated Current (PSC) technique was applied to measure the charge released f...
Stress induced polarization currents and electromagnetic emission from rocks and ionic crystals, accompanying their deformation
polarization currents electromagnetic emission rocks ionic crystals stress
2009/12/14
A crucial question of the scientific community nowadays, concerns the existence of electric signals preceding earthquakes. In order to give a plausible answer to this question, we carried out two kind...
Geochemistry of trondhjemites and mafic rocks in the Bymarka ophiolite fragment,Trondheim,Norway:Petrogenesis and tectonic implications
Geochemistry of trondhjemites mafic rocks Bymarka ophiolite fragment tectonic implications
2009/12/3
The Early Ordovician Bymarka ophiolite fragment is situated in the Upper Allochthon of the central Norwegian Caledonides. Geochemical and geochronological investigations of this and other ophiolite fr...
Sveconorwegian U-Pb zircon and monazite ages of granulite-facies rocks,Hisarøya,Gulen,Western Gneiss Region,Norway
Sveconorwegian U-Pb zircon monazite ages granulite-facies rocks
2009/12/3
U-Pb zircon data from newly discovered granulite-facies rocks on Hisarøya, Gulen,Western Norway, yield a discordia line with upper and lower intercepts of 1646 ± 110 Ma and 987 ± 10 Ma, respect...
Comparison of pattern-recognition techniques for classification of Silurian rocks from Lithuania based on geochemical data
pattern-recognition techniques classification Silurian rocks geochemical data
2009/12/3
There is no widely recognized chemical classification of sedimentary rocks. The geochemical classification of sedimentary rocks utilizes features that can be observed in hand specimens or in thin sect...
Low-grade sedimentary rocks on Vanna,North Norway:a new occurrence of a Palaeoproterozoic (2.4-2.2 Ga) cover succession in northern Fennoscandia
Low-grade sedimentary rocks new occurrence Palaeoproterozoic (2.4-2.2 Ga) cover succession
2009/12/2
The Archaean to Palaeoproterozoic West Troms Basement Complex comprises various tonalitic gneisses, felsic and mafic intrusive rocks and intervening narrow NW-SE-trending belts with partly mylonitised...
Microstructure induced nonlinearity of unconsolidated rocks as related to seismic diagnostic problems
Microstructure induced nonlinearity unconsolidated rocks seismic diagnostic problems
2009/11/13
Manifestations of the so-called structure induced nonlinearity are considered for the case of a granular medium, the latter being a generally accepted model of nonconsolidated rocks in seismics. The c...
Multifractal magnetic susceptibility distribution models of hydrothermally altered rocks in the Needle Creek Igneous Center of the Absaroka Mountains,Wyoming
Multifractal magnetic susceptibility distribution models hydrothermally altered rocks Needle Creek Igneous Center
2009/11/11
Magnetic susceptibility was measured for 700 samples of drill core from thirteen drill holes in the porphyry copper-molybdenum deposit of the Stinkingwater mining district in the Absaroka Mountains, W...
Chemical changes in water circulating deep in the fissures of the solid
rock are studied. The ultimate chemical composition is determined by
the conditions of percolation through the soil zone. For ...
Comprehensive Geohydrological Study of Consolidated Sedimentary Rocks in Bornholm
Comprehensive Geohydrological Study Consolidated Sedimentary Rocks
2009/10/29
Problems and procedures conserning planning and execution of geohydrological
investigations of aquifer systems composed of consolidated sedimentary rocks are
discussed. The discussion is illustrated...
Geohydrological Properties of Tectonic Zones in Hard Rocks Obtained from Artificial Recharge Tests and Numerical Modeling
Geohydrological Properties Tectonic Zones Artificial Recharge Tests Numerical Modeling
2009/10/29
Results from artificial recharge tests through wells in Angered, Gothenburg
have made studies on geohydrological properties of tectonic zones possible.
Measurements of piezometric head in bore holes...
Hydrogeology of Crystalline Rocks:Case Studies of Two Areas in India
Hydrogeology Crystalline Rocks Case Studies Two Areas India
2009/10/28
Two-thirds of India is underlain by consolidated rocks and approximately onehalf
of this hard rock area is composed of Precambrian crystalline rocks. Many
rural areas in India are dependent on groun...
Estimation of Aquifer Parameters by Least-Squares Method under Linear Flow Conditions in Fractured Rocks
Aquifer Parameters Least-Squares Method Linear Flow Conditions
2009/10/26
Pumping and recovery test data in phyllite formations were analysed under linear
flow conditions by incorporating modification in the method proposed by Sen
(1986). Although the Sen (1986) method is...
Stimulated infrared emission from rocks:assessing a stress indicator
Stimulated infrared emission rocks stress indicator
2009/10/22
To study the effect of stress-activated positive hole (p-hole) charge carriers on the infrared (IR) emission from rocks, we subjected a portion (~10 vol.%) of a large (60×30×7.5 cm3) block of anorthos...
Diagenetic influences on iron-bearing minerals in Devonian carbonate and siliciclastic rocks of Estonia
Devonian diagenesis carbonate rocks siliciclastic rocks mixed carbonate-siliciclastic rocks
2009/10/22
The Estonian Devonian sediments consist of carbonate, siliciclastic, and mixed carbonate-siliciclastic deposits that have undergone extensive dolomitization. Chemical analysis of 165 samples and XRD m...