At sites with frequent submarine volcanic activity, it is difficult to discern between new and pre-existing lava flows. In particular, the distribution of the fissures from which lava erupts, the routes taken by lava flows and the relationship between the new flows and the pre-existing seafloor bathymetry are often unclear. The volcanic and hydrothermal systems of Axial Seamount submarine volcano in the Pacific Ocean have been studied intensively since eruptions were detected in 1998 (refs 1, 2) and 2011 (ref. 3). Here we combine pre- and post-eruption bathymetric surveys3,4,5,6,7,8, with 1-m lateral resolution and 0.2-m vertical precision, to precisely map the extent and thickness of the lava flows, calculate the volume of lava and unambiguously identify eruptive fissures from the April 2011 eruption. Where the new lava flows extend beyond the boundaries of the repeated surveys, we use shipboard multibeam surveys to map the flows with lower resolution. We show that the eruption produced both sheet and lobate flows associated with high eruption rates and low-eruption-rate pillow mounds. We find that lava flows erupted from new as well as existing fissures and tended to reoccupy existing flow channels. This reoccupation makes it difficult to map submarine flows produced during one eruption without before-and-after bathymetric surveys.
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Chadwick, J. et al. Magmatic effects of the Cobb hotspot on the Juan de Fuca Ridge. J. Geophys. Res. 110, B03101 (2005).
Embley, R. W., Chadwick, W. W. Jr, Clague, D. & Stakes, D. The 1998 Eruption of Axial Volcano: Multibeam anomalies and seafloor observations. Geophys. Res. Lett. 26, 3425–2428 (1999).
Chadwick, W. W. Jr, Nooner, S., Butterfield, D. A. & Lilley, M. D. Seafloor deformation and forecasts of the April 2011 eruption at Axial Seamount. Nature Geosci. http://dx.doi.org/10.1038/ngeo1464 (2012).
Thomas, H. et al. Mapping AUV survey of Axial Seamount. Eos Trans. AGU (Fall Meeting Suppl.) 87, Abstract V23B-0615 (2006).
Caress, D. W. et al. AUV mapping of Axial Seamount, Juan de Fuca Ridge: The northern caldera floor and northeast rim. Eos Trans. AGU (Fall Meeting Suppl.) 88, Abstract T33B-1355 (2007).
Clague, D. A. et al. AUV mapping of Axial Seamount, Juan de Fuca Ridge: The southern caldera floor and upper south rift. Eos Trans. AGU (Fall Meeting Suppl.) 88, Abstract T33B-1354 (2007).
Clague, D. A., Paduan, J. B., Dreyer, B. M., Caress, D. W. & Martin, J. High-resolution AUV mapping and lava flow ages at Axial Seamount. Abstract V14C-05 presented at 2011 Fall Meeting, AGU, San Francisco, California, 5–9 Dec. (2011).
Caress, D. W. et al. in Marine Habitat Mapping Technology for Alaska (eds Reynolds, J. R. & Greene, H. G.) (Alaska Sea Grant College Program, University of Alaska Fairbanks, 2008); http://dx.doi.org/10.4027/mhmta.2008.04.
Embley, R. W., Murphy, K. M. & Fox, C. G. High-resolution studies of the summit of Axial Volcano. J. Geophys. Res. 95, 12785–12812 (1990).
Dziak, R. P. & Fox, C. G. The January 1998 earthquake swarm at Axial Volcano, Juan de Fuca Ridge: Hydroacoustic evidence of seafloor volcanic activity. Geophys. Res. Lett. 26, 3429–3432 (1999).
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., Chadwick, W. W. Jr & Embley, R. W. Direct observation of a submarine volcanic eruption from a sea-floor instrument caught in a lava flow. Nature 412, 727–729 (2001).
Chadwick, W. W. Jr, Embley, R. W., Milburn, H. B., Meinig, C. & Stapp, M. Evidence for deformation associated with the 1998 eruption of Axial Volcano, Juan de Fuca Ridge, from acoustic extensometer measurements. Geophys. Res. Lett. 26, 3441–3444 (1999).
Chadwick, W. W. Jr, Nooner, S., Zumberge, M., Embley, R. W. & Fox, C. G. Vertical deformation monitoring at Axial Seamount since its 1998 eruption using deep-sea pressure sensors. J. Volcanol. Geotherm. Res. 150, 313–327 (2006).
Nooner, S. L. & Chadwick, W. W. Jr Volcanic inflation measured in the caldera of Axial Seamount: Implications for magma supply and future eruptions. Geochem. Geophys. Geosyst. 10, Q02002 (2009).
Dziak, R. P., Haxel, J. H., Bohnenstiehl, D. & Matsumoto, H. Seismic precursors and magma ascent before the April 2011 eruption at Axial Seamount. Nature Geosci. http://dx.doi.org/10.1038/ngeo1490 (2012).
MBARI Mapping Team Seamounts and Ridges Multibeam Survey (Monterey Bay Aquarium Research Institute Digital Data Series No. 7, 1-CD, 2001).
Chadwick, W. W. Jr, Embley, R. W. & Fox, C. G. Evidence for volcanic eruption on the southern Juan de Fuca Ridge between 1981 and 1987. Nature 350, 416–418 (1991).
Fox, C. G., Chadwick, W. W. Jr & Embley, R. W. Detection of changes in ridge-crest morphology using repeated multibeam surveys. J. Geophys. Res. 97, 11149–11162 (1992).
Chadwick, W. W. Jr, Embley, R. W. & Shank, T. M. The 1996 Gorda Ridge eruption: Geologic, mapping, sidescan sonar, and SeaBeam comparison results. Deep Sea Res. II 45, 2547–256 (1998).
Soule, S. A., Fornari, D. J., Perfit, M. R. & Rubin, K. H. New insights into mid-ocean ridge volcanic processes from the 2005–2006 eruption of the East Pacific Rise, 9° 46′ N–9° 56′ N. Geology 35, 1079–1082 (2007).
Fundis, A. T., Soule, S. A., Fornari, D. J. & Perfit, M. R. Paving the seafloor: Volcanic emplacement processes during the 2005–2006 eruptions at the fast spreading East Pacific Rise, 9° 50′ N. Geochem. Geophys. Geosyst. 11, Q08024 (2010).
Fornari, D. J. et al. Submarine lava flow emplacement at the East Pacific Rise 9° 50′ N: Implications for uppermost Ocean crust stratigraphy and hydrothermal fluid circulation. Geophys. Monogr. AGU 148, 182–217 (2004) 311.
Chadwick, W. W. et al. High-resolution mapping of the 1998 lava flows at Axial Seamount. Abstract OS11C-01 presented at 2011 Fall Meeting, AGU, San Francisco, California, 5–9 Dec. (2011).
Chadwick, W. W. Jr, Scheirer, D. S., Embley, R. W. & Johnson, H. P. High-resolution bathymetric surveys using scanning sonars: Lava flow morphology, hydrothermal vents, and geologic structure at recent eruption sites on the Juan de Fuca Ridge. J. Geophys. Res. 106, 16075–16099 (2001).
Clague, D. A., Paduan, J. B. & Davis, A. S. Widespread strombolian eruptions of mid-ocean ridge basalt. J. Volcanol. Geotherm. Res. 180, 171–188 (2009).
Sinton, J. et al. Volcanic eruptions on mid-ocean ridges: New evidence from the superfast spreading East Pacific Rise, 17°–19° S. J. Geophys. Res. 107, 1–21 (2002).
Caress, D. W. & Chayes, D. N. Improved processing of Hydrosweep DS Multibeam Data on the R/V Maurice Ewing. Mar. Geophys. Res. 18, 631–650 (1996).
Caress, D. W. & Chayes, D. N. MB-System: Mapping the Seafloor Open source software distributed from the MBARI and L-DEO web sites (2011); http://www.mbari.org/data/mbsystem/.
A grant from the David and Lucile Packard Foundation to the Monterey Bay Aquarium Research Institute and a contribution from J. Delaney (Univ. Washington) supported acquisition of the 2011 AUV D. Allan B. data. We thank the MBARI AUV operations group consisting of H. Thomas, D. Conlin and D. Thompson for conducting the AUV surveys. We thank the captains and crews of the RVs Zephyr, Western Flyer, Thompson and Atlantis, and the pilots of the ROVs Jason, Doc Ricketts and ROPOS for their flexibility and support as plans changed to collect the 2011 AUV surveys and explore and sample the new flows. The pre-eruptive AUV D. Allan B. data were collected during cruises on the RV Thompson in 2006 and RV Atlantis in 2007 and 2008 under chief scientists B. Chadwick, D. Butterfield and J. Holden, respectively. The 2009 AUV D. Allan B. data collected from the RV Zephyr completed the pre-2011 eruption mapping of the summit and upper south rift zone on Axial Seamount. B.M.D. was supported by NSF award OCE-1061176. PMEL contribution 3791.
The authors declare no competing financial interests.
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Caress, D., Clague, D., Paduan, J. et al. Repeat bathymetric surveys at 1-metre resolution of lava flows erupted at Axial Seamount in April 2011. Nature Geosci 5, 483–488 (2012). https://doi.org/10.1038/ngeo1496
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