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From:Contributions to Mineralogy and Petrology (Vol. 167, Issue 2) Peer-ReviewedVolcan Popocatepetl has explosively erupted in Plinian style at least five times in the last 23,000 years. Extreme deviations in composition and the occurrence of dissolution features in plagioclase and pyroxene, and...
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From:Contributions to Mineralogy and Petrology (Vol. 168, Issue 2) Peer-ReviewedThe problem of whether cumulate rocks were formed by crystal settling or by in situ crystallization after magma emplacement is an important issue concerning the mechanisms of magmatic differentiation. However, it is...
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From:Contributions to Mineralogy and Petrology (Vol. 167, Issue 3) Peer-ReviewedPlagioclase-bearing peridotites are commonly associated with gabbroic rocks sampled around the Moho Transition Zone. Based on mineral chemistry, texture, and spatial relations, the formation of plagioclase-bearing...
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From:Contributions to Mineralogy and Petrology (Vol. 168, Issue 5) Peer-ReviewedMyrmekites have attracted the attention of petrographers over more than a century, and several genetic models have been proposed. We report on myrmekites from the Weinsberg granite of the Moldanubian zone of Upper...
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From:Contributions to Mineralogy and Petrology (Vol. 170, Issue 4) Peer-ReviewedThe Jurassic Pineto ophiolite from Corsica exposes a ~1-km-thick troctolite-olivine-gabbro sequence, interpreted to represent a lowermost sector of the gabbroic oceanic crust from a (ultra-)slow spreading system. To...
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From:Contributions to Mineralogy and Petrology (Vol. 169, Issue 6) Peer-ReviewedAnalysis of mineral inclusions in chemically and physically resistant hosts has proven to be valuable for reconstructing the P-T exhumation history of high-grade metamorphic rocks. The occurrence of cristobalite-bearing...
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From:Contributions to Mineralogy and Petrology (Vol. 176, Issue 1) Peer-ReviewedThis study compares four sets of solution (or activity-composition) models using two internally consistent thermodynamic datasets for calculating isochemical phase diagram sections of six partial melting experiments...
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From:Contributions to Mineralogy and Petrology (Vol. 176, Issue 4) Peer-ReviewedCentrifuge-assisted piston cylinder experiments were conducted on plagioclase in basaltic melt at 1140-1250 °C, 0.42-0.84 GPa and mostly 1000 g. One set of experiments assesses the settling velocity of a dilute...
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From:Contributions to Mineralogy and Petrology (Vol. 169, Issue 2) Peer-ReviewedThe magma storage conditions of the 6.62 Ma Blacktail Creek Tuff eruption, belonging to the Heise volcanic field (6.62-4.45 Ma old) of the Yellowstone hotspot system, have been investigated by combining thermobarometric...
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From:Science (Vol. 242, Issue 4885) Peer-ReviewedDynamics of a Second-Order Phase Transition: P1 to I1 Phase Transition in Anorthite, CaAl.sub.2.Si.sub.2.O.sub.8 STRUCTURAL PHASE TRANSITIONS OCcur when a material changes its crystallographic structure as a function...
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From:Contributions to Mineralogy and Petrology (Vol. 170, Issue 2) Peer-ReviewedMajor, trace and volatile elements were measured in a suite of primitive macrocrysts and melt inclusions from the thickest layer of the 10 ka Grimsvotn tephra series (i.e. Saksunarvatn ash) at Lake Hvitarvatn in central...
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From:Contributions to Mineralogy and Petrology (Vol. 174, Issue 2) Peer-ReviewedThe effect of melt composition on the partitioning of trace elements between anorthite and silicate melts has been studied experimentally in five compositions in the system CaO-Al.sub.2O.sub.3-SiO.sub.2 (CAS) at ~ 1400...
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From:Contributions to Mineralogy and Petrology (Vol. 175, Issue 8) Peer-ReviewedSupercritical fluids in rock-H.sub.2O systems have been proposed to be important agents of mass transfer in subduction zone environments. New experimental studies were conducted on the simple model granite system...
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From:Contributions to Mineralogy and Petrology (Vol. 167, Issue 3) Peer-ReviewedThis contribution reports a detailed study on in situ Sr isotope analyses, along with textural and compositional characteristics, of plagioclase phenocrysts occurring in the rhyodacitic dome-lavas and associated mafic...
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From:Contributions to Mineralogy and Petrology (Vol. 173, Issue 10) Peer-ReviewedExtrusive and intrusive igneous rocks represent different parts of a magmatic system and ultimately provide complementary information about the processes operating beneath volcanoes. To shed light on such processes, we...
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From:Contributions to Mineralogy and Petrology (Vol. 165, Issue 1) Peer-ReviewedIsotopic analyses of ancient mantle-derived magmatic rocks are used to trace the geochemical evolution of the Earth's mantle, but it is often difficult to determine their primary, initial isotope ratios due to the...
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From:Contributions to Mineralogy and Petrology (Vol. 168, Issue 3) Peer-ReviewedSubduction-related Quaternary volcanic rocks from Solander and Little Solander Islands, south of mainland New Zealand, are porphyritic trachyandesites and andesites (58.20-62.19 wt% Si[O.sub.2]) with phenocrysts of...
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From:Contributions to Mineralogy and Petrology (Vol. 168, Issue 3) Peer-ReviewedThe reaction between plagioclase (labradorite and oligoclase) and Mg-rich aqueous solutions was studied experimentally at hydrothermal conditions (600-700 [degrees]C, 2 kbar). During the experiments, plagioclase grains...
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From:Solid Earth (Vol. 9, Issue 4) Peer-Reviewed
It is widely observed that mafic rocks are able to accommodate high strains by viscous flow. Yet, a number of questions concerning the exact nature of the involved deformation mechanisms continue to be debated. In...
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From:Contributions to Mineralogy and Petrology (Vol. 172, Issue 8) Peer-ReviewedThe highly calcic anorthosite (An.sub.>95) from the Sittampundi Layered Complex (SLC) develops corundum, spinel and sapphirine that are hitherto not reported from any anorthositic rocks in the world. Petrological...