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Physicochemical parameters of magmatic and hydrothermal processes at the Yaman-Kasy massive sulfide deposit, the southern Urals 总被引：1，自引：0，他引：1
V. A. Simonov S. V. Kovyazin E. O. Terenya V. V. Maslennikov V. V. Zaykov S. P. Maslennikova 《Geology of Ore Deposits》2006,48(5):369-383
Melt and fluid inclusions in minerals have been studied and physicochemical parameters of magmatic processes and hydrothermal systems estimated at the Yaman-Kasy copper massive sulfide deposit in the southern Urals. It was established that relatively low-temperature (910–945°C) rhyodacitic melts belonging to the tholeiitic series and containing 2.7–5.2 wt % water participated in the formation of the igneous complexes that host the Yaman-Kasy deposit. As follows from ion microprobe results, these silicic magmas had a primitive character. In the distribution of trace elements, including REE, the rhyodacites are closer to basaltic rather than silicic volcanic rocks, and they are distinguished in this respect from the igneous rocks from other massive sulfide deposits of the Urals and the Rudny Altai. Two types of solutions actively took part in the formation of hydrothermal systems: (1) solutions with a moderate salinity (5–10 wt % dissolved salts) and (2) solutions with a low salinity (a value close to that of seawater or even lower). Concentrated fluids with more than 11.5 wt % dissolved salts were much less abundant. Hydrothermal solutions heated to 130–160, 160–270, or occasionally 280–310°C predominated in ore formation. The sequence of mineral-forming processes at the Yaman-Kasy deposit is demonstrated. Mineral assemblages were formed with an inversion of the parameters characterizing ore-forming solutions. An increase in the temperature and salinity of solutions at the early stages was followed by a decrease at the final stages. The evolution of the hydrothermal system at the Yaman-Kasy deposit has much in common with the parameters of black smokers in the present-day Pacific backarc basins. 相似文献
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Lomakin I. V. Pol V. G. Simonov A. V. Shirshakov A. E. Shostak S. V. 《Solar System Research》2020,54(7):567-573
Solar System Research - The “Bumerang” space mission to the satellites of Mars is discussed. The purpose of the mission is to study the satellites and return of soil samples from Phobos... 相似文献
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Golubev Yu. F. Tuchin A. G. Grushevskii A. V. Koryanov V. V. Tuchin D. A. Morskoy I. M. Simonov A. V. Dobrovolskii V. S. 《Solar System Research》2016,50(7):597-603
The development of a methodology for designing trajectories of spacecraft intended for the contact and remote studies of Jupiter and its natural satellites is considered. This methodology should take into account a number of specific features. Firstly, in order to maintain the propellant consumption at an acceptable level, the flight profile, ensuring the injection of the spacecraft into orbit around the Jovian moon, should include a large number of gravity assist maneuvers both in the interplanetary phase of the Earth-to-Jupiter flight and during the flight in the system of the giant planet. Secondly, the presence of Jupiter’s powerful radiation belts also imposes fairly strict limitations on the trajectory parameters.
相似文献27.
The paper deals with the procedure for the generation and optimization of the trajectory plan for missions in neighboring circumsolar space by means of gravity-assist maneuvers near Venus and Earth. An optimum flight trajectory proposed for use in the prospective Intergelio-Zond Russian mission is presented as an example of the described procedure. 相似文献
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The paper refers to the current status of asteroid hazard in Russia and abroad. The authors emphasize the relevance of a sober
assessment of its real state and specific circumstances working from the principle of reasonable sufficiency. The paper presents
a practical approach to the asteroid hazard problem. It consists of a proposal for a mission to the Apophis asteroid and to
define the main parameters of this hazardous celestial body. The article also considers how the spacecraft would look, as
well as its mission profile for the period of 2012–2014. 相似文献
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V. A. Vorontsov M. G. Lokhmatova M. B. Martynov K. M. Pichkhadze A. V. Simonov V. V. Khartov L. V. Zasova L. M. Zelenyi O. I. Korablev 《Solar System Research》2011,45(7):710-714
A new phase of Venus research has started in Russia; the Federal Space Program includes the Venera-D design with the launch
of the spacecraft scheduled for 2016. The mission comprises an orbiter, a descent vehicle, and balloon probes. The balloon
probes will be placed at different altitudes in the cloud layer and under the clouds, where they are intended to last for
a long time in the atmosphere of Venus. The successful implementation of the design will allow solving of quite a number of
scientific tasks for comparative planetology. 相似文献
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N.L. Dobretsov V.A. Vernikovsky Yu.V. Karyakin E.A. Korago V.A. Simonov 《Russian Geology and Geophysics》2013,54(8):874-887
The patterns and history of Mesozoic–Cenozoic plume magmatism in the Arctic is considered in relation with suprasubduction volcanism and geodynamic events. The Mesozoic–Cenozoic magmatic history of the area includes seven stages, distinguished by correlation of ages and compositions of volcanics associated with mid-ocean rifting, plumes, and subduction; three of seven stages correspond to global events at 230–200 Ma, 130–120 Ma, and 40–30 Ma. The reported study supports the inferred inverse correlation between plate velocities and amount of subduction-related volcanism. The gained knowledge is used for paleotectonic reconstructions in the Arctic. 相似文献