EarthRef.org Reference Database (ERR)
Development and Maintenance by the EarthRef.org Database Team

Detailed Reference Information
Lupton et al. 1999
Lupton, J., Baker, E., Embley, R., Greene, R. and Evans, L. (1999). Anomalous helium and heat signatures associated with the 1998 Axial Volcano Event, Juan de Fuca Ridge. Geophysical Research Letters 26: doi: 10.1029/1999GL002330. issn: 0094-8276.

Water-column plumes sampled before and after the 1998 eruptive event on Axial Volcano, Juan de Fuca Ridge, showed a complex pattern in 3He and heat very different from that observed during previous magma injection events. Plumes detected in 1997 before the event had relatively high 3He/heat consistent with the volatile-rich character of the known hydrothermal vents within the summit caldera. A response cruise in February 1998 immediately after the event failed to detect any event plumes, but instead found an intense steady-state type plume with high-temperature signals, moderate 3He enrichments, and low 3He/heat ratios. This plume was present over the caldera and extended a considerable distance off axis. In contrast, all of the plumes detected during follow-up cruises in July-September 1998 had moderate temperature signals, high 3He concentrations, and elevated 3He/heat ratios. Comparison with previous events suggests that the low 3He/heat plume sampled in February was either the remnant of an event plume which had already migrated off axis, or an event plume-like discharge which was smeared out by strong currents. It is likely that the high 3He/heat plumes observed in July-September were derived from the injected dike or from the new lava flow. ¿ 1999 American Geophysical Union

BACKGROUND DATA FILES

Abstract

Keywords
Marine Geology and Geophysics, Heat flow (benthic) and hydrothermal processes, Marine Geology and Geophysics, Midocean ridge processes, Oceanography, Biological and Chemical, Hydrothermal systems
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
2000 Florida Avenue N.W.
Washington, D.C. 20009-1277
USA
1-202-462-6900
1-202-328-0566
service@agu.org
Click to clear formClick to return to previous pageClick to submit