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Shallow-crustal magma chamber beneath the axial high of the CoAxial Segment of Juan de Fuca Ridge at the source site of the 1993 eruption

William Menke, Michael West and Maya Tolstoy
Shallow-crustal magma chamber beneath the axial high of the CoAxial Segment of Juan de Fuca Ridge at the source site of the 1993 eruption
Geology (Boulder) (April 2002) 30 (4): 359-362

Abstract

Seismic imaging reveals a shallow-crustal magma chamber beneath the source site of the 1993 eruption on Coaxial segment, Juan de Fuca Ridge. The magma chamber is at least 6 km (super 3) in volume and contains at least 0.6 km (super 3) of melt, enough to supply at least several eruptions of a size equal to the one in 1993. No mid-crustal connection of this magma chamber with the magmatic plumbing of nearby Axial volcano (the current expression of the Cobb-Eickelberg hotspot) is evident, confirming previous geochemical and geological studies that argued against mixing between the two. The lack of connectivity implies that magma transport through the uppermost mantle and lower crust are very highly focused into narrow (<5-10 km) conduits.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 30
Serial Issue: 4
Title: Shallow-crustal magma chamber beneath the axial high of the CoAxial Segment of Juan de Fuca Ridge at the source site of the 1993 eruption
Affiliation: Lamont-Doherty Earth Observatory, Palisades, NY, United States
Pages: 359-362
Published: 200204
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 13
Accession Number: 2002-030932
Categories: Solid-earth geophysicsApplied geophysics
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. sects., sketch map
N45°53'60" - N46°17'60", W130°30'00" - W129°40'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200211
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