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Recent eruptions on the CoAxial segment of the Juan de Fuca Ridge: Implications for mid-ocean ridge accretion processes

R. W. Embley,1 W. W. Chadwick,2 M. R. Perfit,3 M. C. Smith,3 and J. R. Delaney4

1Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Hatfield Marine Science Center, Newport, Oregon 97365
2Cooperative Institute for Marine Resources Studies, Oregon State University, Hatfield Marine Science Center, Newport, Oregon 97365
3Department of Geology, University of Florida, Gainesville, Florida, 32611
4School of Oceanography, University of Washington, Seattle, WA 98195

Journal of Geophysical Research, 105(B7), 16,501–16,525 (2000).
Copyright ©2000 by the American Geophysical Union. Further electronic distribution is not allowed.

References

Appelgate, T.B., Morphology of the south flank of Axial Volcano, Juan de Fuca Ridge: Results from a Sea MARC I side scan sonar survey, J. Geophys. Res., 95, 12,765–12,783, 1990.

Baker, E.T., G.J. Massoth, R.A. Feely, R.W. Embley, R.E. Thomson, and B.J. Burd, Hydrothermal vent plumes from the CoAxial seafloor eruption site, Juan de Fuca Ridge, Mar. Geophys. Res., 22, 147–150, 1995.

Baker, E.T., G.L. Massoth, R.A. Feely, G.A. Cannon, and R.E. Thomson, The rise and fall of the CoAxial hydrothermal site, 1993–1996, J. Geophys. Res., 103, 9791–9806, 1998.

Ballard, R.D., and J. Francheteau, The relationship between active sulfide deposition and the axial processes of the mid-ocean ridge, Mar. Technol. Soc. J., 16, 8–22, 1982.

Ballard, R.D., R.T. Holcomb, and T.H. van Andel, The Galapagos Rift at 86°W, 3, Sheet flows, collapse pits, and lava lakes of the rift valley, J. Geophys. Res., 84, 5407–5422, 1979.

Batiza, R., Magmatic segmentation of mid-ocean ridges: A review, in Tectonic, Magmatic, Hydrothermal and Biological Segmentation of Mid-ocean Ridges, edited by C.J. MacLeod, P.A. Tyler, and C.L. Walker, pp. 118–130, Geol. Soc. London, 1996.

Björnsson, A., Dynamics of crustal rifting in NE Iceland, J. Geophys. Res., 90, 10,151–10,162, 1985.

Björnsson, A., G. Johnsen, S. Sigurdsson, G. Thorbergsson, and E. Tryggvason, Rifting of the plate boundary in north Iceland 1975–1978, J. Geophys. Res., 84, 3029–3038, 1979.

Butterfield, D.A., and G.J. Massoth, Geochemistry of north Cleft segment vent fluids: Temporal changes in chlorinity and their possible relation to recent volcanism, J. Geophys. Res., 99, 4951–4968, 1994.

Butterfield, D., I.R. Jonasson, G.J. Massoth, R.A. Feely, K.K. Roe, R.W. Embley, J.F. Holden, R.E. McDuff, M.D. Lilley, and J.R. Delaney, Seafloor eruptions and evolution of hydrothermal fluid chemistry, Philos. Trans. R. Soc. London, Ser. A, 355, 369–386, 1997.

Chadwick, W.W., Jr., and R.W. Embley, Lava flows from a mid-1980s submarine eruption on the Cleft segment, Juan de Fuca Ridge, J. Geophys. Res., 99, 4761–4776, 1994.

Chadwick, W.W., Jr., and R.W. Embley, Graben formation associated with recent dike intrusions and volcanic eruptions on the mid-ocean ridge, J. Geophys. Res., 103, 9807–9825, 1998.

Chadwick, W.W., Jr., R.W. Embley, and C.G. Fox, Evidence for volcanic eruption on the southern Juan de Fuca Ridge between 1981 and 1987, Nature, 350, 416–418, 1991.

Chadwick, W.W., Jr., R.W. Embley, and C.G. Fox, SeaBeam depth changes associated with recent lava flows, CoAxial segment, Juan de Fuca Ridge: Evidence for multiple eruptions between 1981–1993, Geophys. Res. Lett., 22, 167–170, 1995.

Chadwick, W.W., Jr., R.W. Embley, and T.M. Shank, The 1996 Gorda Ridge eruption: Geologic mapping, side-scan sonar, and SeaBeam comparison results, Deep Sea Res., 45, 2547–2570, 1998.

Cherkaoui, A.S.M., W.S.D. Wilcock, and E.T. Baker, Thermal fluxes associated with the 1993 diking event on the CoAxial segment, Juan de Fuca Ridge, J. Geophys. Res., 102, 24,887–24,902, 1997.

Crane, K., The distribution of geothermal fields along the mid-ocean ridge: An overview, in Hydrothermal Vents of the Eastern Pacific: An Overview, edited by M. Jones, Bull. Biol. Soc. Washington, 6, 3–18, 1985.

Crane, K., F. Aikman, R.W. Embley, S. Hammond, A. Malahoff, and J.E. Lupton, The distribution of geothermal fields on the Juan de Fuca Ridge, J. Geophys. Res., 90, 727–744, 1985.

Davis, E., and R. Currie, Geophysical observations of the northern Juan de Fuca: Lessons in sea-floor spreading, Can. J. Earth Sci., 30(2), 278–300, 1993.

Delaney, J.R., H.P. Johnson, and J.L. Karsten, The Juan de Fuca ridge–hot spot–propagating rift system: New tectonic, geochemical, and magnetic data, J. Geophys. Res., 86, 11,747–11,750, 1981.

Delaney, J.R., V. Robigou, R.E. McDuff, and M.K. Tivey, Geology of a vigorous hydrothermal system on the Endeavour segment, Juan de Fuca Ridge, J. Geophys. Res., 97, 19,663–19,682, 1992.

Delaney, J.R., D.S. Kelley, M.D. Lilley, D.A. Butterfield, J.A. Baross, W.S.D. Wilcock, R.W. Embley, and M. Summit, The quantum event of crustal accretion: Impacts of diking at mid-ocean ridges, Science, 281, 222–230, 1998.

Desonie, D., and R. Duncan, The Cobb-Eikelberg seamount chain: Hotspot volcanism with mid-ocean ridge basalt affinity, J. Geophys. Res., 95, 12,697–12,711, 1990.

Detrick, R.S., Introduction to the seafloor mapping section, J. Geophys. Res., 91, 3331–3333, 1986.

Detrick, R.S., P. Buhl, E. Vera, J. Mutter, J. Orcutt, J. Madsen, and T. Brocher, Multichannel seismic imaging of a crustal magma chamber along the East Pacific Rise, Nature, 326, 35–41, 1987.

Dziak, R.P., and C.G. Fox, Hydroacoustic detection of submarine volcanic activity at Axial Volcano, Juan de Fuca Ridge, January 1998, Eos. Trans. AGU, 79(45), Fall Meet. Suppl., F921, 1998.

Dziak, R.P., and C.G. Fox, The January 1998 earthquake swarm at Axial Volcano, Juan de Fuca Ridge: Hydroacoustic evidence for seafloor volcanic activity, Geophys. Res. Letts., 26, 3425–3428, 1999.

Dziak, R.P., C.G. Fox, and A.E. Schreiner, The June–July seismo-acoustic event at CoAxial Segment, Juan de Fuca Ridge, Geophys. Res. Lett., 22, 135–138, 1995.

Einarsson, P., and B. Brandsdottir, Seismological evidence for lateral magma intrusion during the 1978 deflation of the Krafla Volcano in NE Iceland, J. Geophys., 47, 160–165, 1980.

Embley, R.W., and W.W. Chadwick, Jr., Volcanic and hydrothermal processes on the southern Juan de Fuca Ridge, J. Geophys. Res., 99, 4741–4760, 1994.

Embley, R.W., K.M. Murphy, and C.G. Fox, High resolution studies of the summit of Axial Volcano, J. Geophys. Res., 95, 12,785–12,812, 1990 .

Embley, R.W., W.W. Chadwick, M.R. Perfit, and E.T. Baker, Geology of the northern Cleft segment, Juan de Fuca Ridge: Recent lava flows, seafloor spreading, and the formation of megaplumes, Geology, 19, 771–775, 1991.

Embley, R.W., W.W. Chadwick Jr., E.T. Baker, G. Massoth, D. Butterfield, R. Koski, I.R. Jonasson, J.R. Delaney, R. McDuff, M. Lilley, and J. Holden, Comparison of two recent eruptive sites on the Juan de Fuca Ridge: Geological setting and time-series observations, Eos Trans AGU, 75(44), Fall Meet. Suppl., 617, 1994.

Embley, R.W., W.W. Chadwick, I.R. Jonasson, D.A. Butterfield, and E.T. Baker, Initial results of the rapid response to the 1993 CoAxial event: Relationships between hydrothermal and volcanic processes, Geophys. Res. Lett., 22, 143–146, 1995.

Embley, R.W., W.W. Chadwick Jr., D. Clague, and D. Stakes, 1998 Eruption of Axial Volcano: Multibeam anomalies and seafloor observations, Geophys. Res. Lett. 26 , 3425–3428, 1999.

Ewert, J., B. Voight, and A. Bjornsson, Elastic deformation models of Krafla Volcano, Iceland, for the decade 1975 though 1985, Bull. Volcanol., 53, 436–459, 1991.

Fialko, Y.A., and A.M. Rubin, Thermodynamics of lateral dike propagation: Implications for crustal accretion at slow spreading mid-ocean ridges, J. Geophys. Res., 103, 2501–2514, 1998.

Fox, C.G., Potential for monitoring low-level seismicity on the Juan de Fuca Ridge using military hydrophone arrays, Mar. Technol. Soc. J., 27, 22–30, 1993/1994.

Fox, C.G., Special collection on the June 1993 volcanic eruption on the CoAxial segment, Juan de Fuca Ridge, Geophys. Res. Letts., 22, 129–130, 1995.

Fox, C.G., In situ ground deformation measurements from the summit of Axial Volcano during the 1998 volcanic episode, Geophys. Res. Lett., 26, 3437–3440, 1999.

Fox, C.G., and R.P. Dziak, Hydroacoustic detection of volcanic activity on the Gorda Ridge, February–March 1996, Deep-Sea Res., 45, 2513–2530, 1998.

Fox, C.G., K. Murphy, and R.W. Embley, Automated display and statistical analysis of interpreted deep-sea bottom photographs, Mar. Geol., 78, 199–216, 1988.

Fox, C.G., W.W. Chadwick Jr., and R.W. Embley, Detection of changes in ridge-crest morphology using repeated multibeam sonar surveys, J. Geophys. Res., 97, 11,149–11,162, 1992.

Fox, C.G., W.E. Radford, R.P. Dziak, T.K. Lau, H. Matsumoto, and A.E. Schreiner, Acoustic detection of a seafloor spreading episode on the Juan de Fuca Ridge using military hydrophone arrays, Geophys. Res. Letts., 22, 131–134, 1995.

Gillis, K.M., Controls on hydrothermal alteration in a section of fast-spreading oceanic crust, Earth Planet. Sci. Lett., 134, 473–489, 1995.

Gudmundsson, A., Emplacement of dykes, sills and crustal magma chambers at divergent plate boundaries, Tectonophysics, 176, 257–275, 1990.

Gudmundsson, A., Infrastructure and mechanics of volcanic systems in Iceland, J. Volcanol. Geotherm. Res., 64, 1–22, 1995.

Haymon, R.M., et al., Volcanic eruption of the mid-ocean ridge along the East Pacific Rise crest at 9°45–52N: Direct submersible observations of seafloor phenomena associated with an eruption event in April, 1991, Earth Planet. Sci. Lett., 119, 85–101, 1993.

Holden, J.F., M. Summit, and J.A. Baross, Thermophilic and hyperthermophilic microorganisms in 3-30³ C hydrothermal fluids following a deep-sea volcanic eruption, FEMS Microbiol. Ecol., 25, 33–41, 1998.

Johnson, H.P., and R.W. Embley, Axial Seamount: an active ridge axis volcano on the Central Juan de Fuca Ridge, J. Geophys. Res., 95 (B8), 12,689–12,696, 1990.

Johnson, H.P., and M.L. Holmes, Evolution in plate tectonics; The Juan de Fuca Ridge, in The Geology of North America, vol. N, The Eastern Pacific Ocean and Hawaii, edited by E.L. Winterer, D.M. Hussong, R.W. Decker, pp. 73–92, Geol. Soc. of Am., Boulder, Colo., 1989.

Juniper, S.K., J. Sarrazin, and Y. Gelinas, Microbial-mineral floc associated with nascent hydrothermal activity at CoAxial segment, Juan de Fuca Ridge, Geophys. Res. Lett., 22, 179–182, 1995.

Kappel, E.S., and W.R. Normark, Morphologic variability within the axial zone of the southern Juan de Fuca ridge: Interpretation from Sea Marc II, Sea Marc I, and Deep-Sea photography, J. Geophys. Res., 92, 11,291–11,302, 1987.

Kappel, E.S., and W.B.F. Ryan, Volcanic episodicity and a non-steady-state rift valley along northeast Pacific spreading centers: Evidence from Sea MARC I, J. Geophys. Res., 91, 13,925–13,940, 1986.

Lonsdale, P., Structural geomorphology of a fast-spreading rise crest: The East Pacific Rise near 3°25S, Mar. Geophys. Res., 3, 251–293, 1977.

Lupton, J.E., Water column hydrothermal plumes on the Juan de Fuca Ridge, J. Geophys. Res., 95, 12,829–12,842, 1990.

Macdonald, K.C., and P.J. Fox, Overlapping spreading centers: new accretion geometry on the East Pacific Rise, Nature, 302, 55–57, 1983.

Rogers, N., and C. Hawkesworth, Composition of magmas, in Encyclopedia of Volcanology, edited by H. Sigurdsson, pp. 115–131, Academic, San Diego, Calif., 1999.

Rubin, A.M., Dike-induced faulting and graben subsidence in volcanic rift zones, J. Geophys. Res., 97, 1839–1858, 1992.

Schreiner, A.E., C.G. Fox, and R.P. Dziak, Spectra and magnitude of T-waves from the 1993 earthquake swarm on the Juan de Fuca Ridge, Geophys. Res. Lett., 22, 139–142, 1995.

Sempere, J.C., and K.C. Macdonald, Overlapping spreading centers: Implications from crack growth simulation by the displacement discontinuity method, Tectonics, 5, 151–163, 1986.

Sempere, J.-C., J. Lin, H. Brown, H. Schouten, and G.M. Purdy, Segmentation and morphotectonic variations along a slow-spreading center: The Mid-Atlantic Ridge (24°00N–30°40N), Mar. Geophys. Res., 15, 153–200, 1993.

Sigurdsson, H., Dyke injection in Iceland: A review, in Mafic Dyke Swarms, edited by H.C. Hall and W.F. Fahrig, Geol. Assoc. Can. Spec. Pap. 34, Vancouver, B.C., pp. 55–65, 1987.

Sigurdsson, O., Surface deformation of the Krafla fissure swarm in two rifting events, J. Geophys. Res., 47, 154–159, 1980.

Smith, M.C., Geochemistry of eastern Pacific MORB: Implications for MORB petrogenesis and the nature of crustal accretion within the neovolcanic zone of two recently active ridge segments, Ph.D. thesis, Univ. of Fl., Gainesville, 1999.

Smith, M.C., M.R. Perfit, R.W. Embley, and W.W. Chadwick, Interpretations of magmatic activity and crustal accretion along the CoAxial segment and Axial Seamount North Rift Zone: Using combined acoustic and geochemical data to map the seafloor at the scale of individual lava flows, Eos Trans. AGU Fall Meet. Suppl., 78(46), F676, 1997.

Sohn, R.A., S.C. Webb, J.A. Hildebrand, and B.D. Cornuelle, Three-dimensional tomographic velocity structure of upper crust, CoAxial segment, Juan de Fuca Ridge: Implications for on-axis evolution and hydrothermal circulation, J. Geophys. Res., 102, 17,679–17,695, 1997.

Sohn, R.A., J.A. Hildebrand, and S.C. Webb, Postrifting seismicity and a model for the 1993 diking event on the CoAxial segment, Juan de Fuca Ridge, J. Geophys. Res., 103, 9867–9878, 1998.

Spiess, F.N., and J.A. Hildebrand, Deep tow studies of recent activity on the Juan de Fuca Ridge, Eos Trans. AGU, Fall Meet. Suppl., 74(43), 620, 1993.

Taylor, C.D., and C.O. Wirsen, Microbiology and ecology of filamentous sulfur formation, Science, 277, 1483–1485, 1997.

Tucholke, B.E., and J. Lin, A geological model for the structure of ridge segments in slow spreading ocean crust, J. Geophys. Res., 99, 11,937–11,958, 1994.

Tunnicliffe, V., R.W. Embley, J.F. Holden, D.A. Butterfield, G.J. Massoth, and S.K. Juniper, Biological colonization of new hydrothermal vents following an eruption on Juan de Fuca Ridge, Deep-Sea Res., 44, 1627–1644, 1997.

Varga, R.J., J.S. Gee, H. Staudigel, and L. Tauxe, Dike surface lineations as magma flow indicators within the sheeted dike complex of the Troodos ophiolite, Cyprus, J. Geophys. Res., 103, 5241–5256, 1998.

Von Damm, K.L., S.E. Oosting, R. Kozlowski, L.G. Buttermore, D.C. Colodner, H.N. Edmonds, J.M. Edmond, and J.M. Grebmeir, Evolution of East Pacific Rise hydrothermal vent fluids following a volcanic eruption, Nature, 375, 47–50, 1995.

White, W.M., A.W. Hofman, and H. Puchelt, Isotope chemistry of Pacific mid-ocean ridge basalt, J. Geophys. Res., 92, 4881–4893, 1987.


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