The <Superscript>230</Superscript>Th/U dating of sulfide ores in the ocean: Methodical possibilities,measurement results,and perspectives of application     

V. Yu. Kuznetsov  G. A. Cherkashev  V. E. Bel’tenev  A. Yu. Lein  F. E. Maximov  V. V. Shilov  T. V. Stepanova 《Doklady Earth Sciences》2007,417(1):1202-1205

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Two New Hydrothermal Fields at the Mid-Atlantic Ridge     

G. Cherkashov  V. Bel'tenev  V. Ivanov  L. Lazareva  M. Samovarov  V. Shilov 《Marine Georesources & Geotechnology》2013,31(4):308-316

Two new major hydrothermal fields have been discovered in the rift valley of the MAR at 13°N (Ashadze) and l6°38′N (Krasnov). The Ashadze field consists of a cluster of active hydrothermal sites associated with ultramafic rocks and located at the greatest depth in the ocean (4,200 m). By contrast, the Krasnov field consists of inactive sulfide mounds hosted in basalts. The Krasnov is the largest hydrothermal deposit on the MAR (17.4 Mt) so far discovered with iron sulfide as the principal mineral type. By contrast, Cu-Zn sulfides are the major minerals in the Ashadze deposits, which are also enriched in gold and several other metals.  相似文献   

Composition and secondary alterations of microfossils in sediments of the Ashadze-1 hydrothermal field (tropical Mid-Atlantic Ridge)     

I. F. Gablina  L. L. Demina  O. B. Dmitrenko  N. S. Os’kina  E. A. Popova  T. A. Khusid  V. V. Shilov 《Oceanology》2011,51(3):476-490

The first thorough analysis of microfossils from ore-bearing sediments of the Ashadze-1 hydrothermal field in the Mid-Atlantic Ridge sampled during cruise 26 of the R/V Professor Logachev in 2005 revealed the substantial influence of hydrothermal processes on the preservation of planktonic calcareous organisms, as well as on the preservation and composition of the benthic foraminifers. From the lateral and vertical distribution patterns and the secondary alterations of the microfossils, it is inferred that the main phase of the hydrothermal mineralization occurred in the Holocene. Heavy metals (Cu, Co, Cr, and Ag) were accumulated by foraminiferal tests and in their enveloping Fe-Mn crusts. The distribution of authigenic minerals replacing foraminiferal tests demonstrates local zoning related to the hydrothermal activity. There are three mineral-geochemical zones defined: the sulfide zone, the zone with an elevated Mg content, and zone of Fe-Mn crusts.  相似文献   

Dispersion of Rayleigh waves along the Prague-Warsaw profile     

O. Novotný  T. A. Proskuryakova  A. V. Shilov 《Studia Geophysica et Geodaetica》1995,39(2):138-147

Summary Phase velocities of Rayleigh waves propagating along the Prague-Warsaw profile have been determined. A layered model of the Earth's crust and upper mantle, satisfying the observed dispersion of Rayleigh waves, has been derived. In constructing this model, the results of deep seismic soundings along international profile VII were also taken into account.  相似文献   

New hydrothermal ore field at 16°38′ N of the Mid-Atlantic Ridge     

V. E. Bel’tenev  A. A. Shagin  V. F. Markov  I. I. Rozhdestvenskaya  L. I. Lazareva  I. P. Fedorov  G. A. Cherkashev  T. V. Stepanova  I. M. Poroshina  V. V. Shilov 《Doklady Earth Sciences》2006,408(1):530-534

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Mineralogical and geochemical zoning of sediments at the Semenov cluster of hydrothermal fields, 13°31′-13°30′ N, Mid-Atlantic Ridge     

V. Yu. Rusakov  V. V. Shilov  B. N. Ryzhenko  I. F. Gablina  I. A. Roshchina  T. G. Kuz’mina  N. N. Kononkova  I. G. Dobretsova 《Geochemistry International》2013,51(8):646-669

New material from eight columns recovered during Cruise 32 of the R/V Professor Logachev in 2009 was used to explore the lithological facies, biostratigraphy, mineralogy, and geochemistry of sediments from the northwestern (active) and eastern (inactive) hydrothermal vent fields of the Semenov cluster. Mineral types of sediments were distinguished, and a general scheme was proposed for the vertical structure of the hydrothermal-sedimentary sequence overlying massive sulfide ores. It was found that the ore-bearing sediments exhibit a vertical zoning in the distribution of mineral assemblages, which are controlled by oxygen activity. The mechanisms of the formation of atacamite, CuCl₂ · 3Cu(OH)₂, which is a widespread mineral in red iron-oxide bodies replacing sulfides (gossans), were evaluated.  相似文献   

Accumulation history of the metalliferous and ore-bearing sediments of the Krasnov hydrothermal field (MAR 16°38′N) for last 80 Ka: Part II     

V. Yu. Rusakov  T. G. Kuzmina  I. A. Roshchina  V. V. Shilov 《Geochemistry International》2012,50(3):246-271

This paper is dedicated to the geochemical studies of two bottom sediment cores that were taken during Cruise 28 of the R/V Professor Logachev in the Mid-Atlantic Ridge (MAR) 16dg38′N area in 2006. The chemical compositions of background metalliferous and ore (ore-bearing) carbonate sediments are presented and inter-element correlations are examined. Individual episodes are distinguished in the accumulation history of the ore-bearing and metalliferous sediments on the basis of element factor analysis.  相似文献   

New hydrothermal ore fields in the Mid-Atlantic Ridge: Zenith-Victoria (20°08′ N) and Petersburg (19°52′ N)   总被引：1，自引：0，他引：1  

V. V. Shilov  V. E. Bel’tenev  V. N. Ivanov  G. A. Cherkashev  I. I. Rozhdestvenskaya  I. F. Gablina  I. G. Dobretsova  E. V. Narkevskii  A. N. Gustaitis  V. Yu. Kuznetsov 《Doklady Earth Sciences》2012,442(1):63-69

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Pumices,ignimbrites and rhyolites from the Great Kurile Arc     

V. F. Ostapenko  V. I. Fedorchenko  V. N. Shilov 《Bulletin of Volcanology》1967,30(1):81-92

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Comprehensive Research of Ecosystems of Hydrothermal Vents and Cold Seeps in the Bering Sea (Cruise 82 of the R/V Akademik M.A. Lavrentyev)     

Galkin  S. V.  Mordukhovich  V. V.  Krylova  E. M.  Denisov  V. A.  Malyutin  A. N.  Mikhailik  P. E.  Polonik  N. S.  Sanamyan  N. P.  Shilov  V. A.  Ivin  V. V.  Adrianov  A. V. 《Oceanology》2019,59(4):618-621

Oceanology - On cruise 82 voyage of the R/V Akademik M.A. Lavrentyev, comprehensive studies of ecosystems associated with hydrothermal vents and cold seeps in the Bering Sea were carried out. New...  相似文献