Results 41 to 50 of about 1,173 (159)
Journal of Maps, 2019 Depending on its chemical and mineralogical composition, the serpentinite represents a peculiar rocky material, which plays a significant role in influencing pedogenetic weathering, vegetation ecology, geo-mechanical and tectonic processes, as well as ...
Gianfranco Fioraso +3 more
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Geosciences, 2019 Ultramafic magmas (MgO ≥ 18 wt%) are generally thought to be primary mantle melts formed at temperatures in excess of 1600 °C. Volatile contents are expected to be low, and accordingly, high-Mg magmas generally do not yield large explosive ...
Alessandra Correale +2 more
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Emergent Feedbacks Between Progressive Serpentinization, Interface Weakening, and Subduction Rates
Geochemistry, Geophysics, GeosystemsDuring subduction, the downgoing oceanic crust is exposed to high temperatures in the mantle wedge, causing volatile‐bearing minerals to break down and release hydrous fluids into the forearc.
R. K. Stoner +4 more
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Geosciences, 2019 A titanian clinohumite-bearing dunite was recently found in the Ulamertoq ultramafic body within the 3.0 Ga Akia Terrane of southern West Greenland. Titanian clinohumite occurs as disseminated and discrete grains. Titanian clinohumite contains relatively
Ikuya Nishio +7 more
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Island Arc, 2017 AbstractMost serpentinitized peridotite in orogenic belts is derived from oceanic lithosphere, but the emplacement mechanisms of these rocks vary greatly, as illustrated by the nature of these rock bodies and their contacts. The diverse emplacement mechanisms have important implications for connecting ophiolitic rock occurrences to large‐scale orogenic
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Applied Sciences, 2023 Cabo Ortegal, in Spain, was declared a UNESCO Global Geopark in 2023. An ultramafic complex makes it a geologically exciting unit, where many research works have been carried out. Serpentinites, formed by the weathering of peridotites, dunites, and other
Dolores Pereira +4 more
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Frontiers in Earth Science, 2020 The most abundant terrestrial lavas, mid-ocean ridge basalt (MORB) and ocean island basalt (OIB), are commonly considered to be derived from a depleted MORB-mantle component (DMM) and more specific, variably enriched mantle plume sources.
Anastassia Y. Borisova +13 more
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Chrome spinel compositions as evidence for an Archaean ophiolite in the Kuhmo greenstone belt in Finland [PDF]
Bulletin of the Geological Society of Finland, 1994 Investigations into chromite compositions in Archaean ultramafic rocks are rare. Most Archaean ultramafic rocks have undergone a multi-stage history of deformation and metamorphism, and therefore fresh primary chromite is rarely preserved.
J. Liipo +3 more
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Multi-stage serpentinization of ultramafic rocks in the Manlay Ophiolite, southern Mongolia
Mongolian Geoscientist, 2021 Serpentinization of ultramafic rocks in ophiolites is key to understanding the global cycle of elements and changes in the physical properties of lithospheric mantle.
Amarbayar Nomuulin +6 more
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Heavy Metals Content of Two Red Soils in Samar, Philippines
Annals of Tropical Research, 2011 The study evaluated the total and available heavy metal (Cd, Cu, Cr, Pb, Ni and Zn) contents of two red soils in Samar, Philippines, one developed from slate near a mining site (Bagacay soil) and other from serpentinite (Salcedo soil), a well-known ...
Ian A. Navarrete, Victor B. Asio
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