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MAGMATIC NI-CU VERSUS PGE DEPOSITS: CONTRASTING GENETIC CONTROLS AND EXPLORATION IMPLICATIONS

Li C.; Maier W.D.; De Waal S.A. (2001)

Both Ni-Cu and PGE deposits are associated with mafic and ultramafic rocks, but the former often occur in dynamic magmatic systems such as lava channels and magma conduits whereas the later occur in larger layered intrusions. ...

MAGMATIC ORIGIN OF LOW-CA OLIVINE IN SUBDUCTION-RELATED MAGMAS: CO-EXISTENCE OF CONTRASTING MAGMAS

Kamenetsky V.S.; Elburg M.; Arculus R.; Thomas R. (2006)

Unravelling the origin of different components contributing to subduction-related magmas is a prerequisite to understanding the sources and processes involved in their origins. Mafic, high-Ca subduction-related magmas from ...

MAGMATIC RESIDENCE TIMES OF ZONED PHENOCRYSTS: INTRODUCTION AND APPLICATION OF THE BINARY ELEMENT DIFFUSION MODELLING (BEDM) TECHNIQUE

Morgan D.J.; Blake S. (2006)

This paper describes a general technique, binary element diffusion modelling (BEDM), for determining single-crystal residence times in magmas that relies on modelling the diffusion of two or more elements in the crystal. ...

MAGMATIC SOURCES OF ALKALINE GRANITOIDS AND RELATED ROCKS FROM INTRAPLATE MAGMATIC ASSOCIATIONS IN CENTRAL ASIA

Kovalenko V.I.; Yarmolyuk V.V.; Kozlovskii A.M.; Ivanov V.G. (2001)

MAGMATIC SRILANKITE (TI2ZRO6) IN GABBROIC VEIN CUTTING OCEANIC PERIDOTITES: AN UNUSUAL PRODUCT OF PERIDOTITE-MELT INTERACTIONS BENEATH SLOW-SPREADING RIDGES

Morishita T.; Maeda J.; Miyashita S.; Matsumoto T.; Dick H.J.B. (2004)

We report srilankite in a gabbroic vein cutting a serpentinized peridotite collected from the Atlantis II Fracture Zone, the slow-spreading Southwest Indian Ridge, using submersible SHINKAI 6500 of the Japanese Marine ...

MAGMATIC VERSUS METAMORPHIC ORIGIN OF OLIVINE-PLAGIOCLASE CORONAS

de Haas G.-J.L.M.; Andersen T.; Nijland T.G.; Valbracht P.J.; Verschure R.; Maijer C. (2002)

An SEM, REE, and mineral Sm-Nd isotope study on olivine-plagioclase coronas in the Vestre Dale gabbro, Norway, was carried out in order to solve the temporal relationships within these coronas. It is demonstrated that in ...

MAGMATISM AND GEODYNAMICS OF EARLY CALEDONIAN STRUCTURES OF THE CENTRAL ASIAN FOLD BELT (ISOTOPE AND GEOLOGICAL DATA)

Kovalenko V.I.; Yarmolyuk V.V.; Kovach V.P.; Kotov A.B.; Sal'nikova E.B. (2003)

The structure of the Caledonian area of the Central Asian fold belt is determined by Caledonian folded formations made up of Vendian-Cambrian ophiolite and island-arc complexes and by terrains or microcontinents of older ...

MAGMATISM AND GEODYNAMICS OF THE SOUTHERN BAIKAL VOLCANIC REGION (MANTLE HOT SPOT): RESULTS OF GEOCHRONOLOGICAL, GEOCHEMICAL, AND ISOTOPIC (SR, ND, AND O) INVESTIGATIONS

Yarmolyuk V.V.; Kovalenko V.I.; Ivanov V.G.; Pokrovskii B.G. (2003)

The results of geochronological, geochemical, and isotopic investigations for magmatism and geodynamics of the Southern Baikal Volcanic region (mantle hot spot) are presented. The data presented suggest that the formation ...

MAGMATISM OF THE HADEAN GEON IN EARTH DIFFERENTIATION

Balashov Yu.A. (2006)

Essential problems of the oldest geological stage in the Earth’s history (Hadean Geon) marked by formation of geospheres and their transformation during initial interaction remain highly debatable still today because of ...

MAGMATISM OF THE KAROO-MAUD SUPERPLUME IN THE SCHIRMACHER OASIS, EAST ANTARCTICA

Belyatskii B.V.; Sushchevskaya N.M.; Leichenkov G.L.; Mikhal'skii E.M.; Laiba A.A. (2006)

The origination of large plateau basalt provinces in the Earth’s geological history has traditionally been referred to the deep thermal convection caused by plume geodynamics. The emplacement of a large plume into the ...

MAGMATISM OF THE KHAMBIN GRABEN AND EARLY HISTORY OF THE LATE MESOZOIC RIFT SYSTEM FORMATION IN THE WESTERN TRANSBAIKAL REGION

Vorontsov A.A.; Andryushchenko S.V.; Dril S.I.; Kuz'min M.I.; Yarmolyuk V.V. (2006)

The western Transbaikal region was repeatedly subjected to rifting during the Mesozoic. The Early Mesozoic was marked by the formation of a system of grabens filled in with Late Triassic–Early Jurassic bimodal volcanic ...

MAGNESIAN ANDESITES IN RIFT STRUCTURES OF THE AMUR CRATON

Sakhno V.G.; Moiseenko V.G. (2001)

MAGNESIAN ANORTHOSITES AND A DEEP CRUSTAL ROCK FROM THE FARSIDE CRUST OF THE MOON

Takeda H.; Yamaguchi A.; Arai T.; Bogard D.D.; Karouji Y.; Ebihara M.; Ohtake M.; Saiki K. (2006)

Among over thirty lunar meteorites recovered from the hot deserts and Antarctica, Dhofar 489 is the most depleted in thorium (0.05 ppm), FeO, and rare earth elements (REE). Dhofar 489 is a crystalline matrix anorthositic ...

MAGNESIAN BASALT CLASTS FROM THE EET 92014 AND KAPOETA HOWARDITES AND A DISCUSSION OF ALLEGED PRIMARY MAGNESIAN HED BASALTS

Mittlefehldt D.W.; Lindstrom M.M. (1997)

We have performed petrologic and geochemical studies on pyroxene-phyric, magnesian basalt clasts from the howardites EET 92014 and Kapoeta. Pyroxenes in the EET 92014 clast are strongly zoned from Wo4.5En68.9Fs26.6 cores ...

MAGNESIAN GRANITOIDS (SANUKITOIDS) OF THE KOSTOMUKSHA AREA, WESTERN KARELIA: PETROLOGY, GEOCHRONOLOGY, AND TECTONIC ENVIRONMENT OF FORMATION

Samsonov A.V.; Larionova Yu.O.; Bibikova E.V.; Petrova A.Yu.; Puchtel I.S. (2004)

Geological-structural, petrochemical, isotopic and geochronologic data on late-tectonic granitoid massifs and dikes cutting the metavolcanics of the Kostomuksha greenstone belt, western Karelia were discussed. The intrusions ...

MAGNESITE-BEARING INCLUSION ASSEMBLAGE IN NATURAL DIAMOND

Wang A.; Pasteris J.D.; Meyer H.O.A.; Dele-Duboi M.L. (1996)

A significant mineral assemblage has been found as an inclusion in a natural diamond from the Finsch kimberlite pipe of South Africa: a euhedral rhombohedron-shaped magnesite (MgCO3) crystal (d ∼ 30 μm) co-exists with ...

MAGNESIUM AND TITANIUM PARTITIONING BETWEEN ANORTHITE AND TYPE B CAI LIQUID: DEPENDENCE ON OXYGEN FUGACITY AND LIQUID COMPOSITION

Peters M.T.; Shaffer E.E.; Burnett D.S.; Soon S.K. (1995)

Experiments were conducted in air and at low oxygen fugacity (fO2) to evaluate Mg and Ti partitioning between anorthite and liquid (DMg and DTi) in a synthetic composition similar to that of a Type B Ca, Al-rich inclusion ...

MAGNESIUM IN BRINES FROM THE SEVERNAYA DVINA ARTESIAN BASIN AS AN INDICATOR OF KIMBERLITIC MAGMATISM

Malov A.I. (2001)

MAGNESIUM INHIBITION OF CALCITE DISSOLUTION KINETICS

Arvidson R.S.; Collier M.; Davis K.J.; Vinson M.D.; Amonette J.E.; Luttge A. (2006)

We present evidence of inhibition of calcite dissolution by dissolved magnesium through direct observations of the (104) surface using atomic force microscopy (AFM) and vertical scanning interferometry (VSI). Far from ...

MAGNETIC AND GROUND PROBING RADAR MEASUREMENTS FOR SOIL POLLUTION MAPPING IN THE INDUSTRIAL AREA OF VAL BASENTO (BASILICATA REGION, SOUTHERN ITALY): A CASE STUDY

Chianese D.; D’emilio M.; Bavusi M.; Lapenna V.; Macchiato M. (2006)

The joint application of electromagnetic techniques for near-surface exploration is a useful tool for soil pollution monitoring and can also contribute towards describing the spatial distribution of pollutants. The results ...

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