Repeat bathymetric surveys at 1-metre resolution of lava flows erupted at Axial Seamount in April 2011

Caress, David W.; Clague, David A.; Paduan, J. B.; Martin, J. F.; Dreyer, B. M.; Chadwick, William W.; Denny, Alden R.; Kelley, Deborah S.

doi:10.1038/ngeo1496

Cited by 116 publications

(158 citation statements)

References 21 publications

Supporting

Mentioning

142

Contrasting

Order By: Relevance

“…Bathymetric mapping was performed using an ATLAS Hydrosweep Deep-Sea 320-beam echosounder operating at a frequency of ~15 kHz and covering a swath width about four times the water depth. Raw data were processed with CARIS 7.0 HIPS and SIPS and the MB-System software 64 and the grids produced were visualized with ESRI ArcMap 10.0, which allowed for inclusion of 355 additional relevant data to be plotted (e.g. track lines, locations of gas emissions …”

Section: Hydroacoustic Systems 350mentioning

confidence: 99%

First evidence of widespread active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia

Römer

Torres

Kasten

et al. 2014

Earth and Planetary Science Letters

View full text Add to dashboard Cite

25A new extensive submarine cold-seep area was discovered on the northern shelf of South Georgia during R/V Polarstern cruise ANT-XXIX/4 in spring 2013. Hydroacoustic surveys and video-based sea floor observations documented the presence of 133 individual gas bubble emissions, which were restricted to glacially-formed fjords and troughs. Effective methane transport from these emissions into the hydrosphere was proven by relative enrichments of dissolved methane in near-bottom 30 waters. Stable carbon isotopic signatures of the methane pointed to a predominant microbial origin.Although known from many continental margins in the world's oceans, this is the first report of an active area of methane seepage in the Southern Ocean. Our finding of substantial methane emission related to a trough and fjord system, a topographical setting that exists commonly in glaciallyaffected areas, opens up the possibility that methane seepage is a more widespread phenomenon in 35 polar and sub-polar regions than previously thought.

show abstract

Section: Hydroacoustic Systems 350mentioning

confidence: 99%

First evidence of widespread active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia

Römer

Torres

Kasten

et al. 2014

Earth and Planetary Science Letters

View full text Add to dashboard Cite

show abstract

“…Axial volcano has been the site of numerous scientific expeditions spanning nearly three decades (Crane et al, 1985;Chadwick et al, 2012), with an uptick in studies since the late 1990s prompted by its strong and quasi-cyclic volcanic activity. All these investigations have enhanced our knowledge of the geology and dynamics of Axial volcano (e.g., Caress et al, 2012;Nooner and Chadwick, 2009), but little is known concerning its internal structure.…”

Section: Introductionmentioning

confidence: 99%

“…1) and presents a warmer axial regime (Hooft and Detrick, 1995;Carbotte et al, 2008) and an increased crustal production rate (Hooft andDetrick, 1995, West et al, 2003). It is the most recent eruptive center of the hotspot chain (Chadwick et al, 2005), which last erupted in 2011 (Caress et al, 2012;Chadwick et al, 2012;Dziak et al, 2012). The volcano rises ~700 m above the adjacent ridge axis, has two major rift zones extending to the north and south and its summit features an 8-km-long, horseshoe-shaped caldera, where hydrothermal fields are located (Embley et al, 1990) adjacent to recent lava flows (Caress et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…It is the most recent eruptive center of the hotspot chain (Chadwick et al, 2005), which last erupted in 2011 (Caress et al, 2012;Chadwick et al, 2012;Dziak et al, 2012). The volcano rises ~700 m above the adjacent ridge axis, has two major rift zones extending to the north and south and its summit features an 8-km-long, horseshoe-shaped caldera, where hydrothermal fields are located (Embley et al, 1990) adjacent to recent lava flows (Caress et al, 2012). Axial volcano has been the site of numerous scientific expeditions spanning nearly three decades (Crane et al, 1985;Chadwick et al, 2012), with an uptick in studies since the late 1990s prompted by its strong and quasi-cyclic volcanic activity.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Anatomy of an active submarine volcano

Arnulf

Harding

Kent

et al. 2014

Geology

109

View full text Add to dashboard Cite

Most of the magma erupted at mid-ocean ridges is stored in a mid-crustal melt lens that lies at the boundary between sheeted dikes and gabbros. Nevertheless, images of the magma pathways linking this melt lens to the overlying eruption site have remained elusive. Here, we have used seismic methods to image the thickest magma reservoir observed beneath any spreading center to date, which is principally attributed to the juxtaposition of the Juan de Fuca Ridge with the Cobb hotspot. Our results reveal a complex melt body beneath the summit caldera, which is ~14 km long, 3 km wide and up to 1 km thick. The estimated volume of the reservoir is 18-30 km 3 , more than two orders of magnitude greater than the erupted magma volumes of the 1998 and 2011 eruptions. Our images show a network of sub-horizontal to shallow dipping (<30°) features that we interpret as pathways facilitating melt transport from the magma reservoir to the eruption sites.

show abstract

“…We used a tandem mass spectrometry (MS/MS)-based proteomics approach to identify expressed proteins in hydrothermal plume waters at Axial Seamount, an active volcano along the Juan de Fuca Ridge spreading center (Caress et al, 2012;Chadwick et al, 2012;Dziak et al, 2012). We also compared microbial communities in plumes with microbial communities in other areas of the northeastern Pacific Ocean not influenced by hydrothermal systems.…”

Section: Introductionmentioning

confidence: 99%

Sulfur oxidizers dominate carbon fixation at a biogeochemical hot spot in the dark ocean

et al. 2013

View full text Add to dashboard Cite

Bacteria and archaea in the dark ocean (4200 m) comprise 0.3-1.3 billion tons of actively cycled marine carbon. Many of these microorganisms have the genetic potential to fix inorganic carbon (autotrophs) or assimilate single-carbon compounds (methylotrophs). We identified the functions of autotrophic and methylotrophic microorganisms in a vent plume at Axial Seamount, where hydrothermal activity provides a biogeochemical hot spot for carbon fixation in the dark ocean. Free-living members of the SUP05/Arctic96BD-19 clade of marine gamma-proteobacterial sulfur oxidizers (GSOs) are distributed throughout the northeastern Pacific Ocean and dominated hydrothermal plume waters at Axial Seamount. Marine GSOs expressed proteins for sulfur oxidation (adenosine phosphosulfate reductase, sox (sulfur oxidizing system), dissimilatory sulfite reductase and ATP sulfurylase), carbon fixation (ribulose-1,5-bisphosphate carboxylase oxygenase (RuBisCO)), aerobic respiration (cytochrome c oxidase) and nitrogen regulation (PII). Methylotrophs and iron oxidizers were also active in plume waters and expressed key proteins for methane oxidation and inorganic carbon fixation (particulate methane monooxygenase/methanol dehydrogenase and RuBisCO, respectively). Proteomic data suggest that free-living sulfur oxidizers and methylotrophs are among the dominant primary producers in vent plume waters in the northeastern Pacific Ocean.

show abstract

Repeat bathymetric surveys at 1-metre resolution of lava flows erupted at Axial Seamount in April 2011

Cited by 116 publications

References 21 publications

First evidence of widespread active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia

First evidence of widespread active methane seepage in the Southern Ocean, off the sub-Antarctic island of South Georgia

Anatomy of an active submarine volcano

Sulfur oxidizers dominate carbon fixation at a biogeochemical hot spot in the dark ocean

Contact Info

Product

Resources

About