Results 181 to 190 of about 542,668 (236)
Composition and Provenance of Victoria Group Sandstones in Southern North Victoria Land, Antarctica
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 3, September 2026.Three distinct source areas contributed to sandstones of the Victoria Group within the Transantarctic Basin in southern North Victoria Land. During the Permian, quartzose sandstones were derived from erosion of the local Ross Orogen, likely from an uplifted swell in the area of today's Ross Sea, the Ross High.
Martin Elsner +6 more
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Submarine volcanoes along the Aegean volcanic arc
Tectonophysics, 2013 Abstract The Aegean volcanic arc has been investigated along its offshore areas and several submarine volcanic outcrops have been discovered in the last 25 years of research. The basic data including swath bathymetric maps, air-gun profiles, underwater photos and samples analysis have been presented along the four main volcanic groups of the arc. The
Paraskevi Nomikou, Grigoris Rousakis
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Earth-Science Reviews, 2017
Abstract Some 300–600 Tg of volatiles are globally vented each year by arc volcanism. Such arc gas emissions have contributed to past and present-day evolution of the Earth atmosphere and climate by recycling mineral-bound volatiles subducted along active slabs. Carbon dioxide (CO 2 ) and total sulphur (S T ) are, after water, the major components of
Alessandro Aiuppa +4 more
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Abstract Some 300–600 Tg of volatiles are globally vented each year by arc volcanism. Such arc gas emissions have contributed to past and present-day evolution of the Earth atmosphere and climate by recycling mineral-bound volatiles subducted along active slabs. Carbon dioxide (CO 2 ) and total sulphur (S T ) are, after water, the major components of
Alessandro Aiuppa +4 more
openaire +2 more sources
Marine Geology, 2021
Abstract This paper presents volcanic and tectonic features of Shirahama Bank, an unexplored shallow submarine edifice in the northern Ryukyu Arc which was previously poorly mapped, and consequently the nature of its volcanism and tectonism have been poorly understood.
Hiroki Minami +2 more
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Abstract This paper presents volcanic and tectonic features of Shirahama Bank, an unexplored shallow submarine edifice in the northern Ryukyu Arc which was previously poorly mapped, and consequently the nature of its volcanism and tectonism have been poorly understood.
Hiroki Minami +2 more
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Quaternary Volcanism in the Cascade Arc
Elements, 2022The Cascade arc has produced a remarkable diversity of volcanic rocks over the Quaternary period. The major stratovolcanoes that define the arc front are dominated by eruptions of andesitic and dacitic intermediate magmas, produced largely by fractionation, melting, assimilation, and mixing within the crust.
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The role of transcurrent intra‐arc tectonics in the configuration of a volcanic arc
Terra Nova, 1992SUMMARYField investigations show that Plio‐Quaternary Mexican and Quaternary Ecuadorian volcanic arcs are coeval with intra‐arc transcurrent or transtensional tectonics with motions along faults parallel or subparallel to the arc. This relationship can also be observed in the Quaternary Kamchatka arc. These arcs have an anomalously wide distribution of
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The Cretaceous Volcanic Arcs of Japan
Geological Magazine, 1967AbstractThe position of Cretaceous volcanic arcs in Japan may be indicated by outcrops of basic and ultramafic rocks.
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Natural gamma-radiation in the Aeolian volcanic arc
Applied Radiation and Isotopes, 2001Pulse-height distributions of gamma-rays, obtained with a field NaI(Tl) scintillation spectrometer in numerous sites of the Lipari and Vulcano islands (Aeolian volcanic arc, Italy), were measured to determine the U, Th and K concentrations of the bedrock and the relative values of the air absorbed dose rate.
PASQUALE, VINCENZO +3 more
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2011
Primitive magma has been found to finally solidify as a granitic pluton after transformation to dacitic magma of a chemical composition identical to the composition of the upper continental crust. This granitic pluton and the associated cumulate also have been found to form the two-layered continental crust.
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Primitive magma has been found to finally solidify as a granitic pluton after transformation to dacitic magma of a chemical composition identical to the composition of the upper continental crust. This granitic pluton and the associated cumulate also have been found to form the two-layered continental crust.
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Journal of Volcanology and Geothermal Research, 2004
Abstract The Kohistan arc was initiated, offshore of Asia, during the mid-Cretaceous above northward subducting, Tethyan oceanic crust. The arc sutured to Asia c. 90 Ma ago. Subduction of oceanic crust beneath the arc continued until Indian Plate continental rocks began to underthrust the arc c. 50 Ma ago.
Michael G. Petterson, Peter J. Treloar
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Abstract The Kohistan arc was initiated, offshore of Asia, during the mid-Cretaceous above northward subducting, Tethyan oceanic crust. The arc sutured to Asia c. 90 Ma ago. Subduction of oceanic crust beneath the arc continued until Indian Plate continental rocks began to underthrust the arc c. 50 Ma ago.
Michael G. Petterson, Peter J. Treloar
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