Loihi Seamount, Hawaii

Kent AJR, Stolper EM (1997) Contamination of ocean-island basalt magmas by a seawater-derived component at Loihi Seamount, Hawaii. EOS Trans AGU 78 F806... 

Hilton, D. R., McMurty, G. M., Goff, F. (1998) Large variations in vent fluid C02/3He ratios signal rapid changes in magma chemistry at Loihi seamount, Hawaii. Nature, 396, 359-62. 

Patterson, D. B., Elonda, M., McDougall, I. (1990) Atmospheric contamination A possible source for heavy noble gases from Loihi seamount, Hawaii. Geophys. Res. Lett., 17, 705-8. 

Valbracht, P. X, Staudacher, T., Malabo If, A., Allegre, C. X (1997) Noble gas systematics of deep rift zone glasses from Loihi Seamount, Hawaii. Earth Planet. Sci. Lett., 150, 399—411. 

The situation in any single plume appears to be complex the Hawaii case is illustrative. Dixon et al. (1997) estimated H2O concentrations of 525 75 ppm in the source for North Arch basalts, a seafloor field of alkalic basalts north of Oahu. Wallace (1998) estimated 450 190 ppm H2O in the source for Kilauea basalts, and Dixon and Clague (2001) inferred 400 30 ppm H2O in the source for Loihi seamount basalts. Dixon and Clague (2001) argue that these differences are consistent with a mantle plume with multiple components, such as a wet rim and dry core plume model as proposed by Sen et al. (1996). 

Dixon J. E. and Clague D. A. (2001) Volatiles in basaltic glasses from Loihi Seamount, Hawaii evidence for a relatively dry plume component. J. Petrol. 42, 627-654. 

Kent A. J. R., Norman M. D., Hutcheon I. D., and Stolper E. M. (1999b) Assimilation of seawater-derived components in an oceanic volcano evidence from matrix glasses and glass inclusions from Loihi seamount, Hawaii. Chem. Geol. 156, 299-319. 

Gamo T., Ishibashi J.-L, Sakai H., and Tilbrook B. (1987) Methane anomalies in seawater above the Loihi seamount summit area, Hawaii. Geochim. Cosmochim. Acta 51, 2857-2864. 

Karl, D.M., McMurtry, G.M., Malahoff, A. and Garcia, M.O. (1988) Loihi Seamount, Hawaii a mid-plate volcano with a distinctive hydrothermal system. Nature, 335, 532-535. 

Kurz MD, Jenkins WJ, Hart SR, Clague D (1983) Hehum isotopic variations in volcanic rocks from Loihi Seamount and the island of Hawaii. Earth Planet Sci Lett 66 388-406 Lay T, Williams Q, Gamero EJ (1998) The core mantle boundary layer and deep Earth dynamics. Nature 392 461-468... 

Figure 8. Map of 5 He (%) contoured on a surface at 2500 m depth (upper panel, contour interval is 4%) and on a surface of 1100 m depth (lower panel, contour interval is 1%) in the Pacific Ocean. Large He-rich plumes emanate from the East Pacific Rise (EPR) at 15°S and 10°N and Juan de Fuca Ridge (JdFR) systems and spread westward, as indicated by the dashed arrows. Question marks denote regions where flow patterns are not obvious from the 5 He distribution. The helium signal emanating from Loihi Seamount, on the southeastern flank of Hawaii, is transported eastward as a continuous plume to the coast of Mexico. Plot produced by John Lupton using data from Lupton (1998) and unpublished data produced by W. J. Jenkins. [Used by permission of Academic Press, from Sehlosser et al. (2001), International Geophysics Series, Vol. 77, Fig. 5.8.14 and 5.8.16, p. 442 and 443]...

Figure 6 Map of c5( He)% contoured on a surface at 1100 m depth in the north Pacific, showing the broad lateral extent of a helium piume emanating from Loihi Seamount on the south-eastern flank of the Island of Hawaii. As indicated in the key, data are from severai different expeditions.

Halomonas sp. (LOBS) Loihi Seamount, Hawaii (-1714 m) Loihichelins A-F Siderophores Homann et al., 2009... 

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