Initial results of the rapid response to the 1993 CoAxial event: Relationships between hydrothermal and volcanic processes

Details Initial results of the rapid response to the 1993 CoAxial event: Relationships between hydrothermal and volcanic processes Initial results of the rapid response to the 1993 CoAxial event: Relationships between hydrothermal and volcanic processes

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22..143e&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 22, no. 2, p. 143-146

Other

64

Hydrothermal Systems, Mid-Ocean Ridges, Ocean Bottom, Pacific Ocean, Volcanoes, Wave Propagation, Analogies, Lava, Rock Intrusions

Scientific paper

Between June 26 and July 10, 1993, swarms of 'T-wave' events occurred over a 40-km portion of the CoAxial segment on the northern Juan de Fuca Ridge. A rapid response utilizing a CTD/rosette/chemical scanner and a remotely operated vehicle occurred in the month follwing the T-wave swarms. The pattern of T-wave events and water-column anomalies (including several event plumes) are remarkably coincident. The only known eruptive area is at the northern swarm area, where a very fresh pillow lava ridge was discovered, mapped, and sampled with the remotely operated vehicle ROPOS. A vent area about 22 km south of the lava flow was emitting large quantities of bacterially generated floccular material. The temporal pattern of T-wave events and the coincidence between the T-wave swarms, the young lava flows, and hydrothermal plumes sugests that there is a close analogy between this activity and lateral dike injections such as have been closely monitored at Icelandic central volcanoes.

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