Other
Scientific paper
Jan 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25..117k&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 1, p. 117-120
Other
4
Volcanology: General Or Miscellaneous
Scientific paper
The Three Bares are small volcanoes that host the only-known hydrothermal vents active in oceanic crust older than 2 Ma. Major element data for Baby and Mama Bare lavas indicate formation by low extents of partial melting of a depleted mantle source, with limited cooling and crystallization prior to eruption. These lavas are compositionally unlike all lavas produced at the adjacent spreading center but resemble a subset of lavas from small seamounts nearby. We conclude that the Three Bares represent off-axis volcanism rather than normal crustal accretion. Such off-axis volcanism increases basement roughness locally, and thus plays an important role in hydrothermal circulation in sedimented ridge flank settings.
Becker Nathan
Karsten Jill L.
Mottl Michael J.
Wheat Geoffrey C.
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