Browsing by Title
- DSpace Home
- →
- Browsing by Title
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing by Title
Now showing items 15445-15464 of 39126
-
(1992)This chapter discusses the recognition of the soft-sediment deformations as early-diagenetic features. The early-diagenetic stage— that is, the period between sedimentation and lithification, includes some important changes ...
-
(2001)The recovery and radiation of the Early Jurassic ammonoid morphospace, as represented by nine morphologic groups identified in an earlier study, are traced through the first 36 subzones of the Hettangian to Domerian time ...
-
THE RED LUMINESCENCE EMISSION OF FELDSPAR AND ITS WAVELENGTH DEPENDENCE ON K, NA, CA - COMPOSITION (2002)Feldspar specimens covering the whole Or-Ab-An ternary have been investigated by cathodoluminescence (CL), photoluminescence (PL), radioluminescence (RL) and radiophosphorescence (RP) spectrometry. A red luminescence ...
-
(PANGAEA, 2010-08-08)According to data from Cruise 54 of R/V Akademik Mstislav Keldysh (September 2007) results of geochemical studies of redox processes in bottom sediments from the Ob River mouth area as applied to redox indicator elements ...
-
(2004)The redox state variation of orogenic granitoids along convergent plate margins is examined in the Phanerozoic Circum-Pacific Belt and in some Cryptozoic terranes. The Phanerozoic granitoids of the NW and NE Pacific Rims ...
-
(1999)Spinel peridotites from a variety of island arcs have been utilised to calculate the redox state of the mantle wedge above subduction zones. Oxygen fugacities (fO2 values) calculated from the ferric iron content of spinels, ...
-
(2003)The reactions of Au3+ with green rust, stibnite, pyrite, and chalcopyrite were investigated in the laboratory and the size of the gold clusters formed was measured using extended X-ray absorption fine structure (EXAFS) ...
-
(1998)The rates of the reduction of Cr(VI) with Fe(II) were measured in NaCl, NaClO4, and natural seawater as a function of pH (1.5–8.7), temperature (5–40°C) and ionic strength (I = 0.01–2 M). The pseudo first-order rate constant ...
-
(1998)The rates of the reduction of Cr(VI) with Fe(II) were measured in NaCl, NaClO4, and natural seawater as a function of pH (1.5-8.7), temperature (5-40°C) and ionic strength (I = 0.01-2 M). The pseudo first-order rate constant ...
-
(2004)Geochemical composition of sedimentary assemblages is determined by the interaction of specifics of provenances, weathering conditions, mass transfer, sedimentation, metamorphism, and other factors. The role of geodynamic ...
-
THE REFERENCE SECTION OF SILURIAN-LOWER DEVONIAN BOUNDARY DEPOSITS IN THE EASTERN SLOPE OF THE URALS (2000)Carbonate and volcanogenic-sedimentary deposits composing the upper Pridolian Substage and Lochkovian stages in the area between Boksity Station in the south to the Sos'va River in the north (eastern slope of the northern ...
-
(2001)The following Lower-Upper Permian brachiopod zonation is established in the Baraiy River basin (the western Verkhoyansk region): (1) the Megousia kuliki Zone bearing the associated Neouddenites-Tumaroceras yakutorum goniatite ...
-
(1996)The 40 years of activity of the Interdepartmental Stratigraphic Committee (ISC) of Russia for the benefit of the regional stratigraphy in the country are briefly reviewed; the most significant results of the work of the ...
-
(1988)The results of relevellings made in 1948 and 1969-1975 along the Obi-Hingou profile, which is a part of the Garm test area, are analysed. Different characteristics of slow movements in the separate parts of the levelling ...
-
THE RELATION BETWEEN ELECTRIC AND REDOX POTENTIAL: EVIDENCE FROM LABORATORY AND FIELD MEASUREMENTS (2001)In field and laboratory experiments the relationship of redox, electric, and total potential was studied. This was carried out by using different arrangements of Pt and Ag/AgCl electrodes. The total potential is obtained ...
-
(1988)This study presents an analysis of the interrelations between 700 earthquake foci (with M = 6-8 and M > 8) for the period from 1900 to 1980 and fault tectonics and neotectonic deformations in the territory of new folded ...
-
(2001)The investigation of mercury distribution in several hydrothermal deposits in North and South Kamchatka shows a distinct relationship between mercury aureoles and zones of gold-silver mineralization. All known Au-Ag ore ...
-
(1999)Ion adsorption modeling is influenced by the presumed binding structure of surface complexes. Ideally, surface complexes determined by modeling should correspond with those derived from spectroscopy, thereby assuring that ...
-
THE RELATIONSHIP BETWEEN STRATIGRAPHIC DISTRIBUTION OF MAGNESITES AND DEVELOPMENT OF CYANOBACTERIA (2004)A biochemogenic mechanism is proposed for the formation of magnesite. During photosynthesis, cyanobacteria and, sometimes, other autotrophs consumed CO2 dissolved in water; thus, they increased the pH value of the medium. ...
-
(1996)On the basis of different proportions and chemical compositions of shield and post-shield magmas, three types of oceanic intraplate volcanism appear to exist. The average SiO2 contents of primitive melts of most Pacific ...
Now showing items 15445-15464 of 39126