Geologic history of the summit of Axial Seamount, Juan de Fuca Ridge

Multibeam (1 m resolution) and side scan data collected from an autonomous underwater vehicle, and lava samples, radiocarbon‐dated sediment cores, and observations of flow contacts collected by remotely operated vehicle were combined to reconstruct the geologic history and flow emplacement processes on Axial Seamount's summit and upper rift zones. The maps show 52 post‐410 CE lava flows and 20 precaldera lava flows as old as 31.2 kyr, the inferred age of the caldera. Clastic deposits 1–2 m thick accumulated on the rims postcaldera. Between 31 ka and 410 CE, there are no known lava flows near the summit. The oldest postcaldera lava (410 CE) is a pillow cone SE of the caldera. Two flows erupted on the W rim between ∼800 and 1000 CE. From 1220 to 1300 CE, generally small eruptions of plagioclase phyric, depleted, mafic lava occurred in the central caldera and on the east rim. Larger post‐1400 CE eruptions produced inflated lobate flows of aphyric, less‐depleted, and less mafic lava on the upper rift zones and in the N and S caldera. All caldera floor lava flows, and most uppermost rift zone flows, postdate 1220 CE. Activity shifted from the central caldera to the upper S rift outside the caldera, to the N rift and caldera floor, and then to the S caldera and uppermost S rift, where two historical eruptions occurred in 1998 and 2011. The average recurrence interval deduced from the flows erupted over the last 800 years is statistically identical to the 13 year interval between historical eruptions.

[1]  D. Clague,et al.  Petrological variability of recent magmatism at Axial Seamount summit, Juan de Fuca Ridge , 2013 .

[2]  D. Caress,et al.  The 1998 eruption of Axial Seamount: New insights on submarine lava flow emplacement from high‐resolution mapping , 2013 .

[3]  A. M. Podrazhansky,et al.  Geology of Axial Seamount, Juan de Fuca Spreading Center, Northeastern Pacific , 2013 .

[4]  D. Yoerger,et al.  Submarine Lava Flow Emplacement at the East Pacific Rise 9°50´N: Implications for Uppermost Ocean Crust Stratigraphy and Hydrothermal Fluid Circulation , 2013 .

[5]  G. Massoth,et al.  Mixing, Reaction and Microbial Activity in the Sub‐Seafloor Revealed by Temporal and Spatial Variation in Diffuse Flow Vents at Axial Volcano , 2013 .

[6]  W. Chadwick,et al.  Magmatism at Mid‐Ocean Ridges: Constraints from Volcanological and Geochemical Investigations , 2013 .

[7]  D. Clague,et al.  Competing styles of deep-marine explosive eruptions revealed from Axial seamount and Juan De Fuca ridge push core records , 2012 .

[8]  Kenneth H. Rubin,et al.  Effects of variable magma supply on mid‐ocean ridge eruptions: Constraints from mapped lava flow fields along the Galápagos Spreading Center , 2012 .

[9]  M. Lilley,et al.  Seafloor deformation and forecasts of the April 2011 eruption at Axial Seamount , 2012 .

[10]  D. Butterfield,et al.  Seismic precursors and magma ascent before the April 2011 eruption at Axial Seamount , 2012 .

[11]  Deborah S. Kelley,et al.  Repeat bathymetric surveys at 1-metre resolution of lava flows erupted at Axial Seamount in April 2011 , 2012 .

[12]  Kenneth H. Rubin,et al.  The East Pacific Rise between 9°N and 10°N: Twenty-five years of integrated, multidisciplinary oceanic spreading center studies , 2012 .

[13]  E. Baker,et al.  Volcanic Eruptions in the Deep Sea , 2012 .

[14]  D. Swanson,et al.  Keanakākoʻi Tephra produced by 300 years of explosive eruptions following collapse of Kīlauea's caldera in about 1500 CE , 2012 .

[15]  D. Caress,et al.  High-resolution AUV mapping and lava flow ages at Axial Seamount , 2011 .

[16]  H. Thomas,et al.  Volcanic morphology of West Mata Volcano, NE Lau Basin, based on high‐resolution bathymetry and depth changes , 2011 .

[17]  D. Clague,et al.  Explosive eruptions at mid-ocean ridges driven by CO 2 -rich magmas , 2011 .

[18]  D. Fornari,et al.  Paving the seafloor: Volcanic emplacement processes during the 2005–2006 eruptions at the fast spreading East Pacific Rise, 9°50′N , 2010 .

[19]  Kenneth H. Rubin,et al.  Geochemistry of lavas from the 2005–2006 eruption at the East Pacific Rise, 9°46′N–9°56′N: Implications for ridge crest plumbing and decadal changes in magma chamber compositions , 2010 .

[20]  V. Tunnicliffe,et al.  Spotlight: Axial Seamount , 2010 .

[21]  D. Clague,et al.  Five million years of compositionally diverse, episodic volcanism: Construction of Davidson Seamount atop an abandoned spreading center , 2009 .

[22]  H. Thomas,et al.  High-Resolution AUV Mapping Reveals Structural Details of Submarine Inflated Lava Flows , 2009 .

[23]  D. Fornari,et al.  A record of eruption and intrusion at a fast spreading ridge axis: Axial summit trough of the East Pacific Rise at 9–10°N , 2009 .

[24]  D. Clague,et al.  Widespread strombolian eruptions of mid-ocean ridge basalt , 2009 .

[25]  W. Chadwick,et al.  Volcanic inflation measured in the caldera of Axial Seamount: Implications for magma supply and future eruptions , 2009 .

[26]  H. Thomas,et al.  Abundance and Distribution of Hydrothermal Chimneys and Mounds on the Endeavour Ridge Determined by 1-m Resolution AUV Multibeam Mapping Surveys , 2008 .

[27]  E. Baker,et al.  High‐resolution surveys along the hot spot–affected Galápagos Spreading Center: 2. Influence of magma supply on volcanic morphology , 2008 .

[28]  Hanumant Singh,et al.  Explosive volcanism on the ultraslow-spreading Gakkel ridge, Arctic Ocean , 2008, Nature.

[29]  H. Thomas,et al.  AUV Mapping of Axial Seamount, Juan de Fuca Ridge: The Southern Caldera Floor and Upper South Rift , 2007 .

[30]  Kenneth H. Rubin,et al.  New insights into mid-ocean ridge volcanic processes from the 2005–2006 eruption of the East Pacific Rise, 9°46′N–9°56′N , 2007 .

[31]  Kenneth H. Rubin,et al.  Recent eruptive history and magma reservoir dynamics on the southern East Pacific Rise at 17°30′S , 2007 .

[32]  Dana R. Yoerger,et al.  Mid-ocean ridge exploration with an autonomous underwater vehicle , 2007 .

[33]  D. Yoerger,et al.  Submeter bathymetric mapping of volcanic and hydrothermal features on the East Pacific Rise crest at 9°50′N , 2007 .

[34]  D. Clague,et al.  Large Lava Pond Complex on the Juan de Fuca Ridge: an Effusive, Energetic Eruption that Drained Away , 2005 .

[35]  Matthew C. Smith,et al.  Minimum speed limit for ocean ridge magmatism from 210Pb–226Ra–230Th disequilibria , 2005, Nature.

[36]  W. Ridley,et al.  Channelized lava flows at the East Pacific Rise crest 9°–10°N: The importance of off‐axis lava transport in developing the architecture of young oceanic crust , 2005 .

[37]  Matthew C. Smith,et al.  Magmatic effects of the Cobb hot spot on the Juan de Fuca Ridge , 2005 .

[38]  W. Chadwick.  Quantitative constraints on the growth of submarine lava pillars from a monitoring instrument that was caught in a lava flow , 2003 .

[39]  D. Fornari,et al.  A new model for submarine volcanic collapse formation , 2003 .

[40]  Deborah K. Smith,et al.  Volcanic investigations of the Puna Ridge, Hawai'i: relations of lava flow morphologies and underlying slopes , 2003 .

[41]  Dana R. Yoerger,et al.  Waxing and waning volcanism along the East Pacific Rise on a millennium time scale , 2003 .

[42]  Lionel Wilson,et al.  Deep submarine pyroclastic eruptions: theory and predicted landforms and deposits , 2003 .

[43]  Tracy K. P. Gregg,et al.  Volcanic eruptions on mid‐ocean ridges: New evidence from the superfast spreading East Pacific Rise, 17°–19°S , 2002 .

[44]  W. Chadwick,et al.  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 , 2001 .

[45]  S. White,et al.  Basaltic lava domes, lava lakes, and volcanic segmentation on the southern East Pacific Rise , 2000 .

[46]  W. Chadwick,et al.  Recent eruptions on the CoAxial segment of the Juan de Fuca Ridge: Implications for mid‐ocean ridge accretion processes , 2000 .

[47]  T. Gregg,et al.  A laboratory investigation into the effects of slope on lava flow morphology , 2000 .

[48]  W. Chadwick,et al.  Evidence for deformation associated with the 1998 eruption of Axial Volcano, Juan de Fuca Ridge, from acoustic extensometer measurements , 1999 .

[49]  R. Dziak,et al.  The January 1998 Earthquake swarm at Axial Volcano, Juan de Fuca Ridge: Hydroacoustic evidence of seafloor volcanic activity , 1999 .

[50]  C. Fox.  In situ ground deformation measurements from the summit of Axial Volcano during the 1998 volcanic episode , 1999 .

[51]  D. Clague,et al.  1998 eruption of axial volcano: Multibeam anomalies and sea‐floor observations , 1999 .

[52]  D. Clague,et al.  Kīlauea summit overflows: their ages and distribution in the Puna District, Hawai'i , 1999 .

[53]  R. Embley,et al.  Submarine lineated sheet flows: a unique lava morphology formed on subsiding lava ponds , 1999 .

[54]  T. Shank,et al.  The 1996 Gorda Ridge eruption: geologic mapping, sidescan sonar, and SeaBeam comparison results , 1998 .

[55]  D. Fornari,et al.  Rapid emplacement of a mid-ocean ridge lava flow on the East Pacific Rise at 9° 46'-51'N , 1996 .

[56]  W. Chadwick,et al.  Submarine lava-flow inflation: A model for the formation of lava pillars , 1996 .

[57]  E. Baker,et al.  Initial results of the rapid response to the 1993 CoAxial event: Relationships between hydrothermal and volcanic processes , 1995 .

[58]  W. Chadwick,et al.  SeaBeam depth changes associated with recent lava flows, Coaxial Segment, Juan De Fuca Ridge: Evidence for multiple eruptions between 1981–1993 , 1995 .

[59]  D. W. Peterson,et al.  Development of lava tubes in the light of observations at Mauna Ulu, Kilauea Volcano, Hawaii , 1994 .

[60]  W. Chadwick,et al.  Lava flows from a mid‐1980s submarine eruption on the Cleft segment, Juan de Fuca Ridge , 1994 .

[61]  W. Chadwick,et al.  Volcanic and hydrothermal processes associated with a recent phase of seafloor spreading at the northern Cleft segment: Juan de Fuca Ridge , 1994 .

[62]  J. P. Kauahikaua,et al.  Emplacement and inflation of pahoehoe sheet flows: observations and measurements of active lava flows on Kilauea volcano, Hawaii , 1994 .

[63]  Matthew C. Smith,et al.  Volcanic eruption of the mid-ocean ridge along the East Pacific Rise crest at 9°45-52'N: direct submersible observations of seafloor phenomena associated with an eruption event in April, 1991 , 1993 .

[64]  S. J. Goldstein,et al.  226Ra-230Th disequilibrium in axial and off-axis mid-ocean ridge basalts , 1993 .

[65]  R. W. Griffiths,et al.  Solidification and Morphology of Submarine Lavas: A Dependence on Extrusion Rate , 1992 .

[66]  R. Embley,et al.  Submarine tumuli and inflated tube-fed lava flows on Axial Volcano, Juan de Fuca Ridge , 1992 .

[67]  W. Chadwick,et al.  Detection of changes in ridge‐crest morphology using repeated multibeam sonar surveys , 1992 .

[68]  D. Clague,et al.  Geochronology and petrogenesis of MORB from the Juan de Fuca and Gorda ridges by 238U230Th disequilibrium , 1991 .

[69]  G. Walker,et al.  Structure, and origin by injection of lava under surface crust, of tumuli, “lava rises”, “lava-rise pits”, and “lava-inflation clefts” in Hawaii , 1991 .

[70]  E. Baker,et al.  Geology of the northern Cleft segment, Juan de Fuca Ridge: Recent lava flows, sea-floor spreading, and the formation of megaplumes , 1991 .

[71]  Kenneth H. Rubin,et al.  Dating of neovolcanic MORB using (226Ra/230Th) disequilibrium , 1990 .

[72]  R. Embley,et al.  High‐resolution studies of the summit of Axial Volcano , 1990 .

[73]  E. Baker,et al.  Hydrothermal venting from the summit of a ridge axis Seamount: Axial Volcano, Juan de Fuca Ridge , 1990 .

[74]  R. Duncan,et al.  The Cobb‐Eickelberg Seamount Chain: Hotspot volcanism with mid‐ocean ridge basalt affinity , 1990 .

[75]  H. Johnson,et al.  Axial seamount: An active ridge axis volcano on the Central Juan De Fuca Ridge , 1990 .

[76]  J. Delaney,et al.  Hot spot‐ridge crest convergence in the northeast Pacific , 1989 .

[77]  P. Lipman,et al.  Voluminous submarine lava flows from Hawaiian volcanoes , 1988 .

[78]  D. Fornari.  Submarine lava tubes and channels , 1986 .

[79]  Robert D. Ballard,et al.  Volcanics and structure of the famous Narrowgate Rift: evidence for cyclic evolution: AMAR 1 , 1981 .

[80]  Robert D. Ballard,et al.  3. SHEET FLOWS, COLLAPSE PITS, AND LAVA LAKES OF THE RIFT VALLEY , 1979 .

[81]  Robert D. Ballard,et al.  Morphology and tectonics of the inner rift valley at lat 36°50′N on the Mid-Atlantic Ridge , 1977 .

[82]  J. G. Moore,et al.  Mechanism of Formation of Pillow Lava , 1975 .

[83]  H. R. Shaw.  Viscosities of magmatic silicate liquids; an empirical method of prediction , 1972 .

[84]  T. Simkin,et al.  Caldera Collapse in the Galapagos Islands, 1968: The largest known collapse since 1912 followed a flank eruption and explosive volcanism within the caldera. , 1970, Science.

[85]  T. H. Andel,et al.  Ponded Sediments of the Mid-Atlantic Ridge between 22° and 23° North Latitude , 1969 .

[86]  Hans Thomas,et al.  High-Resolution Multibeam, Sidescan, and Subbottom Surveys Using the MBARI AUV D. Allan B , 2008 .

[87]  C. German,et al.  Mid-ocean ridges : hydrothermal interactions between the lithosphere and oceans , 2004 .

[88]  J. Lockwood,et al.  Geologic Map of the Summit Region of Kïlauea Volcano, Hawaii , 2003 .

[89]  T. Gregg,et al.  Quantification of submarine lava-flow morphology through analog experiments , 1995 .

[90]  P. Reimer,et al.  Extended 14C Data Base and Revised CALIB 3.0 14C Age Calibration Program , 1993, Radiocarbon.

[91]  M. Stuiver,et al.  Modeling Atmospheric 14C Influences and 14C Ages of Marine Samples to 10,000 BC , 1993, Radiocarbon.

[92]  W. Broecker,et al.  Accelerator Mass Spectrometric Radiocarbon Measurements on Foraminifera Shells from Deep-Sea Cores , 1990, Radiocarbon.

[93]  J. Lupton,et al.  Hydrothermal vents on an axis seamount of the Juan de Fuca ridge , 1985, Nature.

[94]  Digital Commons @ University of South Florida Digital Commons @ University of South Florida Submarine Strombolian Eruptions on the Gorda Mid ‐ Ocean Ridge Submarine Strombolian Eruptions on the Gorda Mid Ocean Ridge , 2022 .