Results 161 to 170 of about 13,020 (209)

Active Submarine Hotspot Volcanism

1992
Die ...
Devey, Colin W, Stoffers Peter
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Eocene Explosive Submarine Volcanism, Ninetyeast Ridge, Indian Ocean

Marine Geology, 1978
Abstract A basaltic sequence of Eocene submarine-erupted pyroclastic sediments totals at least 388 m at DSDP Site 253 on the Ninetyeast Ridge. These fossiliferous hyaloclastic sediments have been erupted and fragmented by explosive volcanism (hydroexplosions) in shallow water.
A.J. Fleet, B.C. McKelvey
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Fallout of Pyroclastic Debris from Submarine Volcanic Eruptions

Science, 1991
Volcanic fallout deposits on land, being widespread and accessible for study, have received much attention and have revealed a great deal about subaerial eruption mechanisms. In contrast, virtually nothing is known about equivalent deposits produced by submarine volcanoes, despite the probable abundance of such material in today's oceans and in ...
K V, Cashman, R S, Fiske
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Shallow submarine volcanism

Journal of Geophysical Research, 1972
The photographic records of shallow submarine eruptions show distinctive color differences in the expanding cloud indicative of contact surfaces between different subterranean fluids initially in the volcanic pipe. A fluid dynamic model is developed that incorporates the essential features of the blast wave expansion of a high-temperature condensible ...
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Noble gases in submarine pillow volcanic glasses

Earth and Planetary Science Letters, 1983
Abstract Fifteen submarine glasses from the East Pacific Rise (CYAMEX), the Kyushu-Palau Ridge (DSDP Leg 59) and the Nauru Basin (DSDP Leg 61) were analysed for noble gas contents and isotopic ratios. Both the East Pacific Rise and Kyushu-Palau Ridge samples showed Ne excess relative to Ar and a monotonic decrease from Xe to Ar when compared with air
M. Ozima, S. Zashu
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Acoustic observations of nonexplosive submarine volcanism

Journal of Geophysical Research, 1973
A seamount having a least depth of 210 meters and located northwest of Saipan in the Mariana Islands has been identified as the most probable source of the volcanic activity detected by sofar in April and May 1966. The nonexplosive character of the sofar signals is ascribed to an eruption of fluid magma that yielded continuous production of steam ...
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Volcanic Submarine Deposit as Tight Gas Reservoir

Latin American and Caribbean Petroleum Engineering Conference, 2009
Abstract In the Neuquen basin, center west of Argentina, a tight gas field was developed in submarine volcanic rocks. The field called Cupen Mahuida is a faulted anticline, which produced oil and gas from the upper formations. This deeper reservoir was discovered in 2001.
M. Schiuma, V. Martinez, L. Monti
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Morphological investigations of submarine volcanism: Henderson Seamount

Geology, 1980
New, high-quality bathymetric data for Henderson Seamount (about 80 km west of the southern tip of Baja California) reveal complexities of structure that allow comparison with subaerial volcanoes. Henderson is 3.3 km high, with a basal diameter of 33 km, resembling a subaerial shield volcano in gross morphology. The summit is composed of alkali basalts.
Patrick T. Taylor, Charles A. Wood, Timothy J. O'Hearn   +2 more
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Submarine volcanism as a source for iron

Earth and Planetary Science Letters, 1970
Abstract Deposition rates of iron on the East Pacific Rise are 4–30 times larger than in surrounding areas of the Pacific, suggesting local volcanism to be the source of iron. The distributions of Co, Ni, Mn, Ti and Al support this conclusion.
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Factors governing the nature of submarine volcanism

Bulletin of Volcanology, 1963
Examination of the volumetric expansion of vesiculating water vapor at temperatures and pressure corresponding to those of basaltic and rhyolitic magmas erupting under various depths of sea water indicates that explosive ash formation is unlikely at depths greater than 500 meters.
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