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K IN CLINOPYROXENE AT HIGH PRESSURE AND TEMPERATURE: AN EXPERIMENTAL STUDY

Harlow G.E. (1997)

Clinopyroxene (Cpx) is a principal upper-mantle phase for concentrating large cations but has not been viewed as a major crystal-chemical reservoir for K because K 1 is considered too large to enter the largest site, M2, ...

K, MG, TI AND CA ISOTOPIC COMPOSITIONS AND REFRACTORY TRACE ELEMENT ABUNDANCES IN HIBONITES FROM CM AND CV METEORITES: IMPLICATIONS FOR EARLY SOLAR SYSTEM PROCESSES

Sahijpal S.; Goswami J.N.; Davis A.M. (2000)

Potassium and magnesium isotopic compositions of hibonites from the Murchison (CM) and Allende (CV) meteorites are determined by an ion microprobe to look for possible presence of the short-lived nuclides 41Ca and 26Al at ...

K-AR AGE AND SR-ND CHARACTERISTICS OF SUBALKALI BASALTS IN THE CENTRAL GEORGIAN NEOVOLCANIC REGION (GREATER CAUCASUS)

Lebedev V.A.; Chernyshev I.V.; Chugaev A.V.; Dudauri O.Z.; Vashakidze G.T. (2006)

Late Cenozoic magmatism in the Greater Caucasus during the last 8.5 Ma was manifested in the Elbrus, Kazbek, and Central Georgian neovolcanic regions. In our work, we present K–Ar dates obtained for young rocks of Central ...

K-AR AGE OF VOLCANISM IN SOUTH KAMCHATKA

Sheimovich V.S.; Karpenko M.I. (1996)

For the purpose of the geological mapping of Cenozoic volcanic rocks in South Kamchatka, K-Ar ages of the rocks were determined using 30 whole rock samples. The rocks of the andesite association were found to be of the ...

K-AR AGES OF MONZODIORITE-GRANITE MASSIFS IN THE URALS

Smirnov V.N.; Kaleganov B.A. (2001)

K-AR DATING OF ILLITIC FRACTIONS OF ESTONIAN "BLUE CLAY" TREATED WITH ALKYLAMMONIUM CATIONS

Chaudhuri S.; Srodon J.; Ctauer N. (1999)

Abstract-Two clay fractions of a Cambrian claystone from Estonia, consisting essentially of illite and 20% expandable illite-smectite, (I-S) were treated with C12 and C,8 alkylammonium cations for K-exchange. Both the ...

K-AR GEOCHRONOLOGY OF NEW VOLCANIC CENTERS ERUPTIONS IN THE KAZBEK REGION OF THE GREAT CAUCASUS

Chernyshev I.V.; Arakelyants M.M.; Lebedev V.A.; Bubnov S.N.; Gol'tsman Yu.V. (1999)

The aim of this paper was to report and discuss the data available for the K-Ar dating of effusive rocks from a few centers of recent volcanic activity in the Kazbek region (Great Caucasus) of the Caucasian segment of the ...

K-FELDSPAR-MUSCOVITE-ANDALUSITE-QUARTZ-BRINE PHASE EQUILIBRIA: AN EXPERIMENTAL STUDY AT 25 TO 60 MPA AND 400 TO 550°C - AN EXPERIMENTAL INVESTIGATION

Frank M.R.; Candela P.A.; Piccoli P.M. (1998)

Felsic magmas may evolve one or more water or chlorine-rich fluid phases which can transport heat and solutes into associated hydrothermal systems and can contribute to alteration and ore deposition. To understand the role ...

K-RICH FLUID METASOMATISM AT HIGH-PRESSURE METAMORPHIC CONDITIONS: LAWSONITE DECOMPOSITION IN RODINGITIZED ULTRAMAFITE OF THE MAKSYUTOVO COMPLEX, SOUTHERN URALS (RUSSIA)

Schulte B.; Sindern S. (2002)

Fine grained rodingite-like rocks containing epidote, clinozoisite, garnet, chlorite, phengite and titanite occur within antigorite serpentinite boudins from the high-pressure metamorphic Maksyutovo Complex in the Southern ...

K-U-TH SYSTEMATICS OF IGNEOUS ROCKS FOR PLANETOLOGICAL COMPARISONS: OCEANIC ISLAND-ARC VOLCANICS ON EARTH VERSUS ROCKS ON THE SURFACE OF VENUS

Nikolaeva O.V. (1997)

A database of published information was compiled to develop K-U-Th systematics of oceanic island-arc (OIA) volcanic rocks. In order to obtain a pure case of subduction-related oceanic volcanism, the data set for the OIA ...

K-U-TH СИСТЕМАТИКА ВЕЩЕСТВА ПЛАНЕТНЫХ ТЕЛ СОЛНЕЧНОЙ СИСТЕМЫ

Базилевский А.Т. (1985)

KAIDUN METEORITE: CRYSTALS OF OXIDES IN CAVITIES

Ivanov A.V.; Kononkova N.N.; Stroganov I.A.; Zolensky M.E.; Yang S.V. (2006)

Cavities in two texturally and genetically distinct clasts of the Kaidun meteorite were found out to contain crystals of distinct morphology, but of a similar composition. Cavities in chondrite breccia contain thin (<4 ) ...

KALIFERSITE, A NEW ALKALINE SILICATE FROM KOLA PENINSULA (RUSSIA) BASED ON A PALYGORSKITE-SEPIOLITE POLYSOMATIC SERIES

Ferraris G.; Belluso E.; Khomyakov A.P.; Soboleva S.V. (1998)

Kalifersite, (K, Na)5(Fe3+)7[Si20O50](OH)6 · 12H2O, is a new [001] fibrous silicate discovered in a drill core of a hydrothermally altered pegmatite in the urtite series at Mt. Kukisvumchorr (Kola Peninsula). The new mineral ...

KALININGRAD EARTHQUAKE OF SEPTEMBER 21, 2004 AND SEISMIC HAZARD FORECAST IN THE BELARUSIAN-BALTIC REGION

Aronov A.G.; Seroglazov R.R.; Aronova T.I.; Safronov O.N. (2006)

The paper deals with the earthquakes that took place in the Kaliningrad region (Russia) on 21 September 2004 and were felt in the territories of Poland, Lithuania, Latvia, Estonia, Belarus and Finland. Data on space and ...

KAOLIN POLYTYPE EVIDENCE FOR A HOT-FLUID PULSE ALONG CALEDONIAN THRUSTS DURING RIFTING OF THE EUROPEAN MARGIN

Parnell J.; Watt G.; Chen H.; Wycherley H.; Boyce A.; Elmore D.; Blumstein R.; Engel M.; Green P. (2004)

Sedimentary basins developed along the European margin during the earliest, Permian, stage of proto-Atlantic rifting, during a phase of high heat flow. The proximity of some basins to Caledonian thrusts has implied that ...

KARELIAN CARBONATE SEDIMENTATION INVERSION ON THE BALTIC SHIELD. A REFLECTION OF GLOBAL CHANGES IN THE CONDITIONS OF PRECAMBRIAN EXOGENESIS?

Melezhik V.A.; Predovskiy A.A. (1989)

The tracing of the geochemical evolution of carbonate deposits in the earth's history is a major scientific problem. Our understanding of this evolution is in inverse relation to the age of sedimentary sequences. However, ...

KARELIAN SHUNGITE-AN INDICATION OF 2.0-GA-OLD METAMORPHOSED OIL-SHALE AND GENERATION OF PETROLEUM: GEOLOGY, LITHOLOGY AND GEOCHEMISTRY

Melezhik V.A.; Fallick A.E.; Filippov M.M.; Larsen O. (1999)

The ca. 2.0-Ga-old, 600-m-thick upper Zaonezhskaya Formation near Lake Onega, NW Russia, contains unusually high concentrations of Corg (up to 98%), averaging around 25%. The formation contains an estimated 25×1010 tonnes ...

KARPINSKIOSAURUS ULTIMUS (SEYMOURIAMORPHA, PARAREPTILIA) FROM THE UPPER PERMIAN OF EUROPEAN RUSSIA

Bulanov V.V. (2002)

The genus Raphanodon Ivachnenko, 1987 (Leptorophidae, Seymouriamorpha) is not a valid taxon, since its type species Nycteroleter ultimus Tchudinov et Vjuschkov, 1956 is assigned to the genus Karpinskiosaurus. The cranial ...

KARST ROLE IN THE FORMATION OF DIAMOND PLACERS OF THE MUNO-MARKHINSKII INTERFLUVE (YAKUTSK DIAMOND-BEARING PROVINCE, RUSSIA)

Afanas'ev V.P.; Zinchuk N.N.; Pokhilenko N.P.; Krivonos V.F.; Yanygin Yu.T. (2001)

The paper is devoted to the karst role in the formation of aureoles of kimberlite indicator minerals (KIM) and diamond placers in the modern alluvium of the Muna-Markha interfluve. Its territory is open, i.e., the Lower ...

KARST ZONES. VERY IMPORTANT TARGETS IN THE SEARCH FOR HYDROCARBON POOLS IN THE CARBONATE SEQUENCES OF THE SIBERIAN CRATON

Karogodin Y.N.; Vladimirov A.V.; Yershov S.V. (1989)

Most oil and gas pools found in the Lena-Tunguska oil and gas province of the Siberian craton are known to be confined to granular or fractured-granular reservoir rocks in clastic sandstone-siltstone strata. Such rocks ...

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