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L. P. Sviridenko 《Mineralogy and Petrology》1994,50(1-3):59-67
Summary Two main geochemiscl types of granites are distingushed in the Salmi pluton: 1) ovoid biotite-hornblende granites, 2) non-ovoid biotite granites. The first one is characterized by higher CO2, CO and CH4 concentrations. The second type is rich in fluorine and shows similarities with rare metal Phanerozoic granites. Both granite types began to crystallize when Pf, < Ptot, but non-ovoid granites, which crystallized in a wider temperature range, reached conditions Pf, > POtot at the final stage. The mole fraction of carbon group gases (CO2, CO and CH4) decreases and that of H2O increases in all granites from early crystallizing minerals to those of late crystallization.Compositional differences between ovoid biotite-hornblende and non-ovoid biotite granites are due to differences in the protolith composition.
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Die Evolution der fluiden Phase während der Kristallisation von Graniten, Salmi Pluton, Karelia, Russland
Zusammenfassung Zwei geochemisch charakterisierte Granittypen können innerhalb des Salmi Plutons unterschieden werden: 1) ein ovoidaler Biotit-Hornblende-Granit, und 2) ein nichtovoidaler Biotit-Granit. Der erste Typ ist durch höhere Konzentrationen von CO2, CO und CH4 charakterisiert; der zweite Granittyp ist reich an Fluor und zeigt Ähnlichkeiten mit phanerozoischen Graniten, die seltene Metalle führen. Beide Granittypen beginnen bei Pfl, < Ptot, zu kristallisieren, nicht-ovoidale Granite jedoch, deren Kristallisation in einem weiteren Temperaturbereich abläuft, erreichen im Finalstadium der Kristallisation Pfl > Ptot,-Bedingungen. In allen Graniten sinkt die Molfraktion der Kohlenstoffgasgruppe (CO2, CO und CH4) bei gleichzeitigem Anstieg von H2O, wenn man frühe Kristallisationsphasen mit späten vergleicht.Die Unterschiede in der Zusammensetzung zwischen den ovoidalen und nichtovoidalen Graniten sind auf Unterschiede in der Protolith-Zusammensetzung zurückzuführen.
With 2 figures 相似文献
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Many-year data on the concentrations of O2 and mineral phosphorus in a fattening-spawning water body for the Pacific salmon (red salmon) are presented; the seasonal and year-to-year dynamics of these con-centrations are analyzed. It is found that the lake water mass features a high concentration of O2, the upper 20-m layer being most aerated. It is shown that the year-to-year variability of the concentration of O2 dissolved in the lake water depends on the amount of organic matter coming with groundwater and surface runoff. The oxygen and phosphorus regimes of the lake at low and abundant entries of puberal red salmon for spawning are considered. 相似文献
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Sapozhnikov V. V. Arzhanova N. V. Mikhailovskii Yu. A. Ukolova T. K. Sviridenko V. D. 《Water Resources》2002,29(4):429-436
Data of hydrochemical studies performed in September 2000 in Lake Kuril'skoe were used to establish the specific features of the spatial distribution of temperature, O2, Si, mineral and organic forms of N and P, and to assess the availability of nutrients to phytoplankton. The concentrations of Nmin and Si were found to be high throughout the water mass from the surface to the bed, whereas Pmin concentration was low because of Fe abundance in the water. The development of phytoplankton is shown to be limited by the Pmin deficiency, which is partially compensated by its regeneration and the capability of diatoms for heterotrophic nutrition. 相似文献
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Sapozhnikov V. V. Arzhanova N. V. Agatova A. I. Kirpichev K. B. Luk'yanova O. N. Lapin S. A. Milovskaya L. V. Ukolova T. K. Sviridenko V. D. Bazarkina L. A. 《Water Resources》2004,31(5):553-559
The nutrient basis of Lake Azabach'e is studied. The distribution of pH and the concentrations of O2, Pmin, Fe, N–NH+
4, N–NO–
3, Si, and organic forms of N and P are considered. The chemical basis of biological production of Lake Azabach'e is assessed. It is found that the amount of Si is excessive everywhere and that phytoplankton production is limited by phosphate and mineral nitrogen deficiency in virtually equal degrees. 相似文献
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