Results 121 to 130 of about 45,840 (156)
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Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1995
Abstract Mafic microgranular enclaves in felsic igneous rocks from two localities in the Lachlan Fold Belt were investigated by proton microprobe to determine their origin. Pronounced differences in trace element content of orthopyroxene and plagioclase between enclaves and a host ignimbrite preclude a cogenetic origin.
Marlina A. Elburg +2 more
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Abstract Mafic microgranular enclaves in felsic igneous rocks from two localities in the Lachlan Fold Belt were investigated by proton microprobe to determine their origin. Pronounced differences in trace element content of orthopyroxene and plagioclase between enclaves and a host ignimbrite preclude a cogenetic origin.
Marlina A. Elburg +2 more
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Earth and Planetary Science Letters, 2000
Abstract Fractals have been used for describing a wide range of natural processes. However, applications of fractal geometry to the study of magma mingling/mixing processes is almost completely lacking, in spite of the fact that such an approach could give new insights into the nature of magmatic interactions.
PERUGINI, Diego, POLI, Giampiero
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Abstract Fractals have been used for describing a wide range of natural processes. However, applications of fractal geometry to the study of magma mingling/mixing processes is almost completely lacking, in spite of the fact that such an approach could give new insights into the nature of magmatic interactions.
PERUGINI, Diego, POLI, Giampiero
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Magma mixing in the Sithonia Plutonic Complex, Greece: evidence from mafic microgranular enclaves
Mineralogy and Petrology, 2003¶Mafic microgranular enclaves occur in most calc-alkaline granitoids, and it is widely accepted that they represent the remnants of basic magmas that interacted with more acid magmas. In this work we present new data on mafic microgranular enclaves occurring in the granodiorites of the Sithonia Plutonic Complex (Northern Greece).
PERUGINI, Diego +3 more
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Magma mixing/mingling in Salmas granodiorite, NW Iran: evidence from mafic microgranular enclaves
Arabian Journal of Geosciences, 2014The interaction of mafic–intermediate and felsic rocks of the Salmas plutonic rocks produced mixed rocks (granodiorites) which contain mafic microgranular enclaves (MMEs). Enclaves ranging from a few millimeters to centimeters in size, and from ellipsoidal to rounded in shape.
Mitra Ghaffari +1 more
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Mineralogy and Petrology, 1997
Petrographic, geochemical and isotopic data are reported for the mafic microgranular enclaves occurring in a calc-alkaline Oligocene pluton outcropping near Xanthi town in northern Greece. The intrusion is composed of dominant granodiorites with minor tonalites and quartz diorites.
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Petrographic, geochemical and isotopic data are reported for the mafic microgranular enclaves occurring in a calc-alkaline Oligocene pluton outcropping near Xanthi town in northern Greece. The intrusion is composed of dominant granodiorites with minor tonalites and quartz diorites.
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Chemie Der Erde, 2009 Rocks of the Late Cretaceous Dagbasi Pluton (88-83Ma), located in the eastern Pontides, include mafic microgranular enclaves (MMEs) ranging from a few centimetres to metres in size, and from ellipsoidal to ovoid in shape.
Emre Aydınçakır, Abdullah Kaygusuz
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Acta Geologica Sinica - English Edition, 2021
AbstractMagmatic microgranular enclaves (MMEs) are widely developed in the Shaocunwu granodiorite at the northeast margin of the eastern Jiangnan orogenic belt. Field geology showed that the MMEs occur as irregular ellipsoids near the edge of the intrusion, and consist of diorite, dominantly composed of amphibole, biotite, and plagioclase grains, with ...
Hua JIANG +6 more
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AbstractMagmatic microgranular enclaves (MMEs) are widely developed in the Shaocunwu granodiorite at the northeast margin of the eastern Jiangnan orogenic belt. Field geology showed that the MMEs occur as irregular ellipsoids near the edge of the intrusion, and consist of diorite, dominantly composed of amphibole, biotite, and plagioclase grains, with ...
Hua JIANG +6 more
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Journal of Asian Earth Sciences, 2004
Abstract Mafic microgranular enclaves (MME) are common in the Early to Middle Miocene Chenar granitoid stock, northwest of Kerman, which is a part of Central Iranian Eocene volcanic belt. They occur individually and in homogeneous or heterogeneous swarms.
M. Arvin, S. Dargahi, A.A. Babaei
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Abstract Mafic microgranular enclaves (MME) are common in the Early to Middle Miocene Chenar granitoid stock, northwest of Kerman, which is a part of Central Iranian Eocene volcanic belt. They occur individually and in homogeneous or heterogeneous swarms.
M. Arvin, S. Dargahi, A.A. Babaei
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Chinese Journal of Geochemistry, 1994
Plagioclase phenocrysts from mafic enclaves and plagioclase from its host granite possess a pattern of complex zonation. A plagioclase phenocryst can generally be divided into three parts: an oscillatory, locally patchy zoned core (An47-19), a ring with dusty, more calcic plagioclase (An64-20) and a normally zoned rim composed of sodic plagioclase ...
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Plagioclase phenocrysts from mafic enclaves and plagioclase from its host granite possess a pattern of complex zonation. A plagioclase phenocryst can generally be divided into three parts: an oscillatory, locally patchy zoned core (An47-19), a ring with dusty, more calcic plagioclase (An64-20) and a normally zoned rim composed of sodic plagioclase ...
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Are mafic microgranular enclaves in durbachites plutonic equivalents of common minettes?
2013Durbachites are K-feldspar-phyric biotite-bearing MgO-rich rocks of syenitic composition whose formation involves the mixing of mafic high-potassium partial melts from an enriched mantle with granitic melts. Due to this process, durbachites encompass a broad compositional range and contain variable amounts of mafic microgranular enclaves (MME).
Krmíček, L., Romer, R.
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