Browsing Геология России by Title
- DSpace Home
- →
- Геология России
- →
- Browsing Геология России by Title
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing Геология России by Title
Now showing items 9532-9551 of 39126
-
(2004)Natural coarse-grained precious opal structures result from the concentration of suspensions of monodisperse silica spheres and their subsequent supramolecular crystallization at low pH values. These processes occur in ...
-
(2002)Hydrous ferric oxide (HFO) colloids formed, in strictly anoxic conditions upon oxidation of Fe2+ ions adsorbed on mineral surface, were investigated under in situ conditions by contact mode atomic force microscopy (AFM). ...
-
(2003)The first natural occurrence of a high-pressure polymorph of chromite has been discovered in the shock-metamorphosed Suizhou meteorite. The composition of this high-pressure polymorph is identical to that of the precursor ...
-
(2003)Quantitative constraints on the rates at which metamorphic reactions proceed in nature are now available from several sources. Most common are predictions made on the basis of laboratory kinetic data. However, the applicability ...
-
(2001)The main purpose of the present study is to investigate the use of natural gamma activity as a measure of geotechnical properties such as density, porosity, water content and shear strength of near surface marine sediments. ...
-
(2001)Gases recovered from their location of formation (for example, gas recovered from drill cuttings) are enriched in C2+ components relative to gases recovered from reservoir production or testing streams. Because reservoir ...
-
(2002)A new high-pressure polymorph of merrillite with the structure of trigonal γ-Ca3(PO4)2 was found in the shock-produced veins of the Suizhou meteorite, where it coexists with ringwoodite, majorite, NaAlSi3O8-hollandite, and ...
-
(2002)Natural hydrofracturing caused by overpressure plays an important role in geopressure evolution and hydrocarbon migration in petroliferous basins. Its mechanism is quite well understood in the case of artificial hydraulic ...
-
(2001)We present the first observations of natural mass-dependent fractionation of the isotopic composition of molybdenum (Mo), using multi-collector inductively coupled plasma mass spectrometry. Variations in the isotopic ...
-
(2003)Knowledge of the formation conditions of Francevillian uranium and manganese ore deposits as well as natural fission reactors sheds light on the early evolution of the atmosphere between 1950 and 2150 Ma ago. The model ...
-
(1999)A conceptual model for the adsorption of linear, flexible weak polyelectrolytes on oxide surfaces is applied to the adsorption and conformation of natural organic matter (NOM) on hematite. The polyelectrolytic nature of ...
-
(1988)A study of the numerous primary microinclusions found in apatite crystals from the Mushugay-Khuduk carbonatite complex (Mongolia) established the presence of natural phosphate-sulfate melts and their basic characteristics. ...
-
(2003)The oxidation rates of natural realgar and amorphous synthetic AsS by dissolved oxygen were evaluated using mixed flow reactors at pH 7.2 to 8.8 and dissolved oxygen contents of 5.9 to 16.5 ppm over a temperature range of ...
-
(2004)Microbial and thermogenic methane migrates towards the seabed where some is utilised during microbially-mediated anaerobic oxidation. Excess methane escapes as gas seeps, which occur in a variety of geological contexts in ...
-
(2005)The natural speciation of Mn (0.19 g/kg), Ni (46 mg/kg), and Zn (42 mg/kg) in the argillic horizon (120 cm depth, pH = 5.6) of an Ultisol from a paddy soil in northern Taiwan was investigated by advanced X-ray synchrotron ...
-
(2004)Combined use of synchrotron-based X-ray fluorescence (SXRF), diffraction (XRD), and absorption (EXAFS) with an X-ray spot size as small as five micrometers allows us to examine noninvasively heterogeneous soils and sediments. ...
-
(1989)There are reports of a potassic igneous rock complex that is new for the region west of Lake Ladoga and includes two facies - intrusive (hypabyssal) and diatreme-forming, with similar chemical and mineralogical composition. ...
-
(2002)Multiple-collector inductively coupled plasma mass spectrometry has been used for the precise measurement of the isotopic composition of Se in geological samples. Se is chemically purified before analysis by using cotton ...
-
(Федеральное государственное бюджетное образовательное учреждение высшего образования «Санкт-Петербургский горный университет», 2018)The article deals with safe operation issues of vertical steel reservoirs with an internal floating roof when storing volatile oil products. The purpose of the work is to study the influence of ventilation openings area ...
Now showing items 9532-9551 of 39126