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Modeling mafic carbonation efficiency using mafic rock chemistries from Nevada, USA
Computers & Geosciences, 2019Abstract Mineral carbonation is one of the many ways that are being actively investigated to sequester point-source carbon dioxide emissions. However, relations between reaction conditions, variations in reactant mineral composition, and carbon sequestration potential are poorly understood.
Daniel M. Sturmer +2 more
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Recent Mafic Volcanism on Mars
Science, 1987The evidence for volcanism on Mars is commonly accepted, but none has been documented in the Valles Marineris equatorial rift system. A recent survey of the troughs in this valley revealed dark patches that are interpreted to be volcanic vents. The configuration and association of these patches with tectonic structures suggest that they are of internal
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1988
The interpretation of the isotopic data on continental basaltic rocks is complicated by factors that are similar to those associated with the continental magmatic arcs. In contrast to the continental margin arcs, however, intermediate composition lavas are relatively rare in comparison to basalt.
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The interpretation of the isotopic data on continental basaltic rocks is complicated by factors that are similar to those associated with the continental magmatic arcs. In contrast to the continental margin arcs, however, intermediate composition lavas are relatively rare in comparison to basalt.
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Neodymium-142 Evidence for Hadean Mafic Crust
Science, 2008Neodymium-142 data for rocks from the Nuvvuagittuq greenstone belt in northern Quebec, Canada, show that some rock types have lower 142 Nd/ 144 Nd ratios than the terrestrial standard (ϵ 142 Nd = –0.07 to –0.15). Within a mafic amphibolite unit, 142
Jonathan, O'Neil +3 more
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2011
Metamorphic mafic rocks (e.g., mafic schist or greenschist and mafic gneiss, amphibolite) are derived from mafic igneous rocks, mainly basalts and andesites, and of lesser importance, gabbro and mafic diorite (Chap. 2). Metamorphic assemblages in mafic rocks are particularly useful in defining the intensity of metamorphism within the metamorphic facies
Kurt Bucher, Rodney Grapes
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Metamorphic mafic rocks (e.g., mafic schist or greenschist and mafic gneiss, amphibolite) are derived from mafic igneous rocks, mainly basalts and andesites, and of lesser importance, gabbro and mafic diorite (Chap. 2). Metamorphic assemblages in mafic rocks are particularly useful in defining the intensity of metamorphism within the metamorphic facies
Kurt Bucher, Rodney Grapes
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Building Archean cratons from Hadean mafic crust
Science, 2017Archean cratons get a Hadean mash-up The vast majority of the rock record over Earth's 4.6-billion-year history has been destroyed through subduction and recycling back into the mantle. Although some slivers of 4-billion-year-old crust remain in the rock record, only isolated zircon mineral grains are dated to be older.
Jonathan O’Neil, Richard W. Carlson
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Geochemistry of Middle Proterozoic mafic and composite mafic-felsic dykes in southeastern Sweden
Geologiska Föreningen i Stockholm Förhandlingar, 1992Abstract Mafic and composite mafic-felsic dykes of Middle Proterozoic age occur within the general area of the Transscandinavian Igneous Belt in southeastern Sweden. The composite dykes consist of felsic, quartz-feldspar porphyritic cores and mafic margins.
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Monogenetic to Polygenetic Mafic Volcanism
2020The mafic back-arc volcanism, uncommon in the Andean Central Volcanic Zone, is represented in the Puna region by late Miocene to Quaternary small monogenetic to polygenetic cinder cones and lava flows, as isolated or poorly clustered centers of basaltic andesitic to andesitic composition. Maars, tuff rings, and domes are also usual.
Beatriz L. L. Coira +1 more
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Crystallization behaviour of mafic intrusives
Earth and Planetary Science Letters, 1970Abstract Whereas it is normally assumed that nucleation of primocrysts in mafic intrusions occurs at the top of the magma chamber, where heat losses are greatest, some authors have postulated nucleation of primocrysts near the base. It is considered that the water content of the magma and the vertical height of the magma chamber are the most ...
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