排序方式： 共有19条查询结果，搜索用时 140 毫秒
11.
V. G. Gonevchuk T. L. Krylova A. A. Orekhov G. A. Gonevchuk D. K. Kokorina 《Russian Journal of Pacific Geology》2009,3(1):3-18
Specific features of the fluid regime in ore-magmatic systems located in the southwestern part of the Kavalerovo ore district (Primorye) are considered. One system is accompanied by mineralization of the porphyry copper type (Lazurnoe deposit); the other system, by tin (copper-tin) mineralization of the hydrothermal type (Iskra deposit). It is shown that the magmatic stages of these systems are distinguished mainly by the chlorophile nature of the copper-gold system and the fluorophile nature of the copper-tin system. The well-known distinction of these systems in terms of the redox parameter is confirmed, and its different evolution scenarios in the systems are shown. The results of the study of fluid inclusions in quartz of postmagmatic associations show that the processes of ore formation at the Lazurnoe deposit were characterized by a wide temperature range and the heterogeneity of the mineral-forming environment. The early period was marked by the coexistence of aqueous-saline brines (mainly of Na-Ca-Mg-chloride composition) and low-density fluid inclusions. The late period was dominated by ordinary hydrothermal solutions. The Iskra deposit formed in a relatively narrow temperature range from homogeneous fluids of essentially Na-chloride composition characterized by moderate and low salinity. 相似文献
12.
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
13.
REE and fluid inclusions in zoned fluorites from Eastern Transbaikalia: Distribution and geochemical significance 总被引：1，自引：0，他引：1
S. F. Vinokurov V. N. Golubev T. L. Krylova V. Yu. Prokof’ev 《Geochemistry International》2014,52(8):654-669
Special methodology was used to study the distribution of REE and some other elements in zoned fluorites from the different deposits of Eastern Transbaikalia. Fluorites from the uranium and polymetallic ore fields sharply differ in their REE distribution pattern and the composition of fluid inclusions, which reflects the geochemical specifics and indicates the possible sources of parental solutions. A gradual change in REE distribution patterns established in the successive growth zones of fluorites clearly coincides with the gradual decrease of temperature and mineralization of fluid inclusions. It is suggested that a change in the REE distribution pattern was provoked by the crystallochemical differentiation related to the formation of nano-sized mineral admixtures of REE phosphates and/or fluorcarbonates, which possess an ability to the selective accumulation of different REE groups. It was found that the zoned fluorites from the Streltsovka and Garsonui deposits show an opposite trends in the change of REE pattern with zonation. With a general decrease in total REE contents, fluorite from the Streltsovka deposit shows a change from positive parabolic to subchondritic pattern, while that from the Garsonui deposit, varies from the negative via subchondritic to the positive patterns. 相似文献
14.
15.
V. N. Krupchatnikov V. I. Kuzin E. N. Golubeva Yu. V. Martynova G. A. Platov A. I. Krylova 《Izvestiya Atmospheric and Oceanic Physics》2009,45(1):116-136
The dynamics of the climate and surface hydrology of northern Eurasia under the conditions of global climate changes is studied using coupled models of the atmospheric and oceanic general circulation. Feedbacks are assessed and analyzed for some parameters of the atmosphere and surface hydrology. The role of the biosphere (including the surface air layer, the vegetation layer, soil, and the hydrosphere) in the dynamics of the climate of the 21st century is studied. The features of the dynamics of the northern Atlantic seas during the periods corresponding to different phases of the North Atlantic Oscillation index are studied. 相似文献
16.
P. G. Korostelev V. G. Gonevchuk N. V. Gorelikova N. I. Ekimova V. V. Kononov T. L. Krylova A. A. Orekhov B. I. Semenyak V. I. Suchkov 《Russian Journal of Pacific Geology》2016,10(1):63-77
The paper considers for the first time the morphology, composition, and conditions of formation of the greisens of the Solnechnoe deposit (Komsomol’sk ore district), a typical cassiterite–silicate assemblage. The greisens are localized in the root parts of the deposit and represent a system of veins and veinlets formed in the contraction fractures of the metasomatically altered roof of the monzogranite intrusion (age of 94–92 Ma). The cassiterite–chlorite–carbonate–muscovite–quartz composition of the greisens with admixture of topaz, fluorite, and apatite reflects the composition of the monzogranites. The greisens are close in age (85.3 Ma on muscovite) to the granitic aplites (80–85 Ma on the whole-rock and biotite) of the final phase of the intrusive magmatism. The fluid regime of their formation differs from that of the economic ores in higher temperature, pressure, and salinity. One distinguishing feature of the greisens is elevated contents of LREE, U, and Th, which are incorporated in the REE fluorcarbonates, thorite, and uranothorite crystallizing together with cassiterite. 相似文献
17.
18.
19.
The current state of the Ivan'kovo Reservoir bacterioplankton is assessed. Data on the total number, biomass, and production of planktonic microflora are presented. The concentrations of active bacteria and their detritus are determined. The distribution of saprophytic microflora is studied. 相似文献