Browsing ELibrary by Title
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- Browsing ELibrary by Title
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing ELibrary by Title
Now showing items 8510-8529 of 21936
-
(1996)The extremely young (2.5 Ma) I-type Eldzhurtinskiy granite complex (Central Caucasus) is uniform with respect to modal composition, major and trace element chemistries of bulk rocks and mineral phases. In contrast, it ...
-
(2003)We have extended a recently developed Monte Carlo technique which includes explicit exchange as well as movement of ions to systems involving heterovalent exchange. These Monte Carlo computer simulations, based on analytical ...
-
(2003)We studied the metallography of Fe-Ni metal particles in 17 relatively unshocked ordinary chondrites and interpreted their microstructures using the results of P-free, Fe-Ni alloy cooling experiments (described in Reisener ...
-
(1997)The volume of both original and published material on the fauna, composition, and facies types of the Ordovician deposits of Penzhinskii Range is summarized in this work. The deposits (the Elgeminai Group) represent a ...
-
(2003)A number of palaeobiogeographical models for Ordovician organic-walled microphytoplankton (acritarchs, prasinophytes, and related groups) have been published during the past 30 years. A modern synthesis of Ordovician ...
-
(2003)Trilobites of the subfamily Asaphinae Burmeister (genus Asaphus s.l.) coming from natural out-crops of the Ordovician beds on the southern shore of Lake Ladoga are monographically studied and revised. Forty-one taxa of the ...
-
(1998)Detailed description of the two newly discovered Hecker-type mud mounds from the Babino quarry is given. A complex multistory internal structure of one of the buildups is well established. The main stages of development ...
-
(1988)We consider some features of the mechanism of magmatic ore formation, based on analysis of quenched textures of differentiated basalt melt. Our new data on the structure of quenched ore-silicate liquid generated at depth ...
-
(1989)A metapicrite extrusion in the Pechenga ore district proved to contain copper-nickel sulfide mineralization analogous in composition to economic copper-nickel ores. The stratiform metapicrite bodies range in thickness from ...
-
(2002)Platinum-group minerals (PGM) placers of Siberia and the Russian Far East are subdivided into three associations on the basis of mineralogical and geochemical features. The first is a ruthenium–iridium–osmium ophiolitic ...
-
(1999)The basaltic andesite ash ejected by Karymsky during its January 1996 eruption was found to contain magnetite, ilmenite, hematite, and pyrite. Native aluminum and α-iron were discovered in the ash for the first time.
-
(2004)Different ore traps describe together with migration sulfide ores span the entire spectrum of large and superlarge accumulations of magmatic sulfide deposits. Hence, the proposed concept of sulfur condensation in the course ...
-
(1989)Ore-bearing gabbroid rocks were recently detected in various places on the Ukrainian shield as segregations relatively high in ilmenite and locally in apatite. The ore body in gabbro-norite of the Smelyy anorthosite pluton ...
-
(2001)We have determined the Rb-Sr isotopic ages of magmatic rocks and ores from the Ermakov deposit and established the following succession of formation from the early to the late stages: (1) formation of the host rocks ...
-
(2002)The metallogenic zonality of the transformed Vendian-Riphean paleoshelf along the passive margin in the south of the Siberian platform is represented by the following ore-geochemical sequence: Cu, Fe, Pb, Zn, Au (Sb, W), ...
-
(1988)This chapter describes diagenesis in the context of ore genesis. After discussing general aspects in some detail, the numerous variabIes involved in diagenesis of metalliferous deposits are each briefly examined. The chapter ...
-
(1990)Organic matter (OM) that is deposited on the bottom as a component of suspended matter derived chiefly from upper ocean layers greatly affects the processes of sedimentation and lithogenesis there. The most reliable ...
-
(2000)Organic matter origins are inferred from carbon isotope ratios (delta13C) in recent continental shelf sediments and major rivers from 465 locations from the north Bering-Chukchi-East Siberian-Beaufort Sea, Arctic Amerasia. ...
-
(2000)Geochemistry of dispersed organic matter (DOM) from oil source rocks of the Abalak Formation and Lower-Vasyugan Subformation of the West-Siberian Plate is considered on a new information level. Regularities of distribution ...
Now showing items 8510-8529 of 21936