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GEOREF RECORD

Gas fluxes from flood basalt eruptions

Stephen Self, Thorvaldur Thordarson and Mike Widdowson
Gas fluxes from flood basalt eruptions (in Large igneous provinces; origin and environmental consequences, Andrew D. Saunders (editor))
Elements (December 2005) 1 (5): 283-287

Abstract

Subaerial continental flood basalt volcanism is distinguished from all other volcanic activity by the repeated effusion of huge batches of basaltic magma ( approximately 10 (super 2) -10 (super 3) km (super 3) per eruption) over short periods of geologic time (<1 Myr). Flood basalt provinces are constructed of thick stacks of extensive pahoehoe-dominated lava flow fields and are the products of hundreds of eruptions. Each huge eruption comes from a dyke-fed fissure tens to hundreds of kilometres long and lasts about a decade or more. Such spatial and temporal patterns of lava production do not occur at any other time in Earth history, and, during eruptions, gas fluxes of approximately 1 Gt per year of SO (sub 2) and CO (sub 2) over periods of a decade or more are possible. Importantly, the atmospheric cooling associated with aerosols generated from the SO (sub 2) emissions of just one flood basalt eruption is likely to have been severe and would have persisted for a decade or longer. By contrast, warming due to volcanogenic CO (sub 2) released during an eruption is estimated to have been insignificant because the mass of CO (sub 2) would have been small compared to that already present in the atmosphere.


ISSN: 1811-5209
Serial Title: Elements
Serial Volume: 1
Serial Issue: 5
Title: Gas fluxes from flood basalt eruptions
Title: Large igneous provinces; origin and environmental consequences
Author(s): Self, StephenThordarson, ThorvaldurWiddowson, Mike
Author(s): Saunders, Andrew D.editor
Affiliation: Open University, Department of Earth Sciences, Milton Keynes, United Kingdom
Affiliation: University of Leicester, Department of Geology, Leicester, United Kingdom
Pages: 283-287
Published: 200512
Text Language: English
Publisher: Mineralogical Society of America and Mineralogical Society of Great Britain and Ireland and Mineralogical Association of Canada and Geochemical Society and Clay Minerals Society, International
References: 26
Accession Number: 2006-049315
Categories: Igneous and metamorphic petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N63°40'00" - N66°30'00", W24°45'00" - W13°30'00"
N44°00'00" - N48°00'00", W125°00'00" - W115°00'00"
Secondary Affiliation: University of Hawai'i at Manoa, USA, United States
Country of Publication: International
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 200614
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