Zobrazeno 1 - 10
of 29
pro vyhledávání: '"N. I. Eremin"'
Publikováno v:
Moscow University Geology Bulletin. 74:504-509
The sulfur isotope composition was measured in the main morphological types and generations of sulfides composing the ores of the Dzhusa deposit and the contents of trace elements were measured using highly sensitive laser ablation-inductively couple
Publikováno v:
Moscow University Bulletin. Series 4. Geology. :78-83
The sulfur isotopic composition was studied for the main morphological types and generation of sulfides composing the ore of the Dzhusinsky deposit, and the content of trace elements was analyzed using the highly sensitive method of mass spectrometry
Publikováno v:
Доклады Академии наук. 484:320-324
Own Se minerals, first established in primary ores of VMS deposits of the Urals, are described. Instrumental neutron activation analysis of bulk ore samples, mineral monofractions and local methods of analysis: LA-ICP- MS, electron probe microanalysi
Autor:
N. I. Eremin, A. L. Dergachev
Publikováno v:
Moscow University Geology Bulletin. 73:325-332
Volcanogenic massive sulfide deposits contain not only Cu, Zn, and Pb, but Sb, Bi, Te, Se Ag, Co, other metals, and variable amounts of Ag and Au. In some of these, gold reserves exceed 100 t, while the gold grade reaches several dozens ppm. An origi
Publikováno v:
Doklady Earth Sciences. 481:839-841
As exemplified by cobalt–bearing Fe–Mn crusts (ferromanganese stromatolite) of the Magellan Seamounts (Clarion–Clipperton Province), the main stages of the structural evolution of bacterial communities have been recognized. It has been demonstr
Publikováno v:
Doklady Earth Sciences. 476:1007-1009
Two sequentially formed groups of dikes in the gabbro–porphyrite complex have been distinguished, the ages of which are early Eifelian (early dikes) and early Givetian (late dikes). We have estimated the temperature impact of ore contact metamorphi
Publikováno v:
Moscow University Geology Bulletin. 70:240-249
Analysis of the regularities of the distribution of mineral resources in the Earth’s geological history allows one to optimize a strategy of prospecting for deposits. On the basis of an original database of Pb and Zn deposits along with a statistic
Publikováno v:
Moscow University Geology Bulletin. 68:295-304
The changing contents and ratios of certain primary and secondary elements in the composition of volcanogenic pyrite deposit ores reveal two tendencies that have different scales of their manifestation in geological time and space. The first one is e
Publikováno v:
Doklady Earth Sciences. 450:566-570
566 Many aspects of oceanic cobalt bearing ferroman ganese crusts (CMC) and crustal concretions (CC) have been studied well. Among them are abundance and conditions of their occurrence on seamounts, internal structure, mineral and chemical composi ti
Publikováno v:
Moscow University Geology Bulletin. 66:274-281
Besshi-type volcanic-associated massive sulfide deposits (VMSD) are associated with undifferentiated basaltic formations. They form within the mid-ocean ridges near the continental margins, in back-arc spreading zones, and rarely in intracontinental