Results 21 to 30 of about 7,121 (239)
Subarctic physicochemical weathering of serpentinized peridotite [PDF]
Earth and Planetary Science Letters, 2017 Abstract Frost weathering is effective in arctic and subarctic climate zones where chemical reactions are limited by the reduced availability of liquid water and the prevailing low temperature. However, small scale mineral dissolution reactions are nevertheless important for the generation of porosity by allowing infiltration of surface water with ...
Jörn-Erik Hövelmann +5 more
openaire +7 more sources
Geosciences, 2017 Cr-spinels from ultramafic rocks from Lokris (Megaplatanos and Tragana), and Beotia (Ypato and Alyki) ophiolitic occurrences were studied. These rocks comprise principally harzburgite with minor dunite. Small amounts of clinopyroxene-rich harzburgite and
Panagiotis Pomonis, Andreas Magganas
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Weakening of Peridotite Sheared at Hydrothermal Conditions
Geochemistry, Geophysics, Geosystems, 2021 We conducted triaxial friction tests at hydrothermal conditions (25°C–350°C) on gouges of peridotite and its principal mineral constituents olivine and orthopyroxene. Pore‐fluid chemistry was varied by the use of peridotite, granite, or quartzite driving
Diane E. Moore, David A. Lockner
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Abundances of uranium and thorium elements in Earth estimated by geoneutrino spectroscopy [PDF]
Geophysical Research Letters, Volume 49, Issue 16, e2022GL099566
(2022), 2022 The decay of the primordial isotopes $^{238}\mathrm{U}$, $^{235}\mathrm{U}$, $^{232}\mathrm{Th}$, and $^{40}\mathrm{K}$ have contributed to the terrestrial heat budget throughout the Earth's history. Hence the individual abundance of those isotopes are key parameters in reconstructing contemporary Earth model.
arxiv +1 more source
Geologica Carpathica, 2014 We studied representative samples from a peridotite body situated NE of Sedlice village within the Central- Carpathian Paleogene sediments in the Central Western Carpathians.
Koppa Matúš +2 more
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Geosciences, 2018 This case study investigates the influence of the mineralogical composition of ultramafic rocks derived from two ophiolite complexes from Greece (Veria-Naousa and Gerania) on their mechanical, physical and physicochemical properties.
Panagiota P. Giannakopoulou +6 more
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Fast assimilation of serpentinized mantle by basaltic magma [PDF]
, 2020 The most abundant terrestrial lavas, mid-ocean ridge and ocean island basalt (MORB and OIB), are commonly considered to be derived from a depleted MORB-mantle component and more specific, variably enriched mantle plume sources. However, findings of oceanic lavas and mafic cumulates issued from melts, enriched in chlorine and having a radiogenic Sr ...
arxiv +1 more source
Mantle rock exposures at oceanic core complexes along mid-ocean ridges
Geologos, 2015 The mantle is the most voluminous part of the Earth. However, mantle petrologists usually have to rely on indirect geophysical methods or on material found ex situ. In this review paper, we point out the in-situ existence of oceanic core complexes (OCCs),
Ciazela Jakub +3 more
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Frontiers in Earth Science, 2021 The Hongshishan mafic-ultramafic complex is situated in the north of the Beishan orogenic collage and the southern part of the Central Asian Orogenic Belt.
Zhaolin Wang +7 more
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