Oregon State University

FY 1999 - 2005 Seafloor Processes

*CIMRS authors.

 

FY 2005

Bohnenstiehl, D.R., R.P. Dziak*, M. Tolstoy, c.G. Fox, and M. Fowler.  2004.  Temporal and spatial history of the 1999-2000 Endeavour Segment seismic series, Juan de Fuca Ridge.  Geochem. Gephys. Geosys. 5(9), Q09003, doi: 10.1029/2004GC000735.

Chaytor, J.D., C. Goldfinger, R.P. Dziak*, and C.G. Fox. 2004. Active deformation of the gorda “Plate”: Constraining deformation models with new geophysical dataGeology 32(4): 353-356.

David, E., K. Becker, R. Dziak*, J. Cassidy, K. Wang, and M. Lilley. 2004. Hydrological response to a seafloor spreading episode on the Juan de Fuca Ridge. Nature 430 (6997): 335-338.

Dziak*, R.P., D.R. Bohnensteihl, H. matsumoto, C.G. Fox, D.K. Smith, M. Tolstoy, T-K Lau*, J.H. Haxel* and M.J. Fowler*. 2004.  P- and T-wave detection thresholds, Pn velocity estimate, and detection of lwer mantle and core P-waves on ocean sound-channel hydrophones at the Mid-Atlantic Ridge. Bull. Seismol. Soc. Am. 94(2): 665-667.

Dziak*, R.P., D.K. Smith, D.R. Bohnenstiehl, C.G. Fox, D. Desbruyeres, H. Matsumoto*, M. Tolstoy, and D.J. Fornari.  2004.  Evidence of a recent magma dike intrusion at the slow spreading Lucky Strike segment, Mid-Atlantic RidgeJ. Geophys. Res. 109(B12102) doi: 10.1029/2004JB003141.

Haxel*, J.H. and R.P. Dziak*.  2005.  Evidence of explosive seafloor volcanic activity from the Walvis Ridge, South Atlantic Ocean.  Geophys. Res. Lettr. 12: L13609, doi:10.1029/2005GL023205.

 

FY 2004

Chadwick*, W. W., Jr., R. W. Embley, and C. G. Fox. 2003. Quantitative constraints on the growth of submarine lava pillars from a monitoring instrument that was caught in a lava flow. J. Geophys. Res., 108(B11): 2534-2547.

Chaytor, J.D., C. Goldfinger, R.P. Dziak*, and C.G. Fox. 2004.  Active deformation of the Gorda “Plate”.  Constraining deformation models with new geophysical data.  Geology 32(4): 353-356.

Dziak*, R.P.  2003.  P- and T- wave detection thresholds, Pn velocity estimate, and detection of lower mantle and core P-waves on ocean sound-channel hydrophones at the Mid-Atlantic Ridge.  BSSA 94(2): 665-677.

Embley, R.W., E.T. Baker, W.W. Chadwick*, Jr., J.E. Lupton, J.A. Resing, G.J. Massoth, and K. Nakamura.  2004.  Exploration of Mariana Arc Volcanoes reveal new hydrothermal systems.  Eos, Trans. Amer. Geophys. Un. 85: 37, 40 (January 27, 2004).

Lupton, J.E., D.G. Pyle, W.J. Jenkins, R. Greene*, and L. Evans*. 2004.  Evidence for an extensive hydrothermal plume in the Tonga-Fiji region of the South Pacific. Geochem. Geophys. Geosys. 5(1): Q01003, doi: 1029/2003GC000607.

Matsumoto*, H., S. Nieukirk*, M. Fowler*, J. Haxel*, S. Heimlich*, D.K. Mellinger*, R. Dziak* and C.G. Fox. 2004.  Sound in the sea: Hands-on experience with NOAA Vents Program.  In: Proceedings of Oceans 2003 Marine Technology and Ocean Science Conference, 22-26 September 2003.  San Diego, CA, 1565-1571.

Smith, D.K., R.P. Dziak*, H. Matsumoto*, C.G. Fox and M. Tolstoy.  2004.  Autonomous hydrophone array monitors seismic activity at northern Mid-Atlantic Ridge.   Eos, Trans. Amer. Geophys. Un. 85(1): 1, 5.

 

FY 2003

Bohnenstiehl, D.R., M. Tolstory, R.P. Dziak*, C.G. Fox, and D.K. Smith. 2001.  Aftershock Sequences In The Mid-Ocean Ridge! Environment: An Analysis Using Hydroacoustic Data.  Tectonophysics  354(1-2): 49-70.

Dziak*, R.P., W.W. Chadwick*, C.G. Fox, and R.W. Embley.  2003.  Hydrothermal temperature Changes At The Southern Juan de Fuca Ridge Associated with a Mw 6.2 Blanco Transform earthquake.  Geology 31(2): 119-122.

Nasby-Lucas*, N.M., R.W. Embley, M.A. Hixon, S.G. Merle*, B.N. Tissot, and D.J. Wright (2002).  Integration of submersible transect data and high-resolution multibeam sonar imagery for a habitat-based groundfish assessment of Heceta Bank ORFish. Bull., 100, 739–751.

 

FY 2002

Chadwick*, W.W., Jr. and M. Stapp.  2002.  A deep-sea observatory experiment using acoustic extensometers: Precise horizontal distance measurements across a mid-ocean ridge.  IEEE J. Ocean. Eng.  27(2): 193-201.

De Ronde, C.E.J., E.T. Baker, G.J. Massoth, J.E. Lupton, I.C. Wright, R.A. Feely, and R.R. Greene*.  2001.  Intra-Oceanic Subduction-Related Hydrothermal Venting, Kermadec forearc, New ZealandEarth & Planet. Sci. Lettr. 193: 359-369.

Dziak*, R.P. and C.G. Fox. 2002.  Evidence Of Harmonic Tremor From A Submarine Volcano Detected Across The Pacific Ocean basinJ. Geophys. Res. 107(B5): 1-12.

Dziak*, R.P., H.P. Johnson. 2002. Hydrothermic Systems: Stirring the Oceanic Incubator. Science’s Compass, 296: 1406-1407

Smith, D.K., M. Tolstoy, C.G. Fox, D.R. Bohnenstiehl, H. Matsumoto*, and M.J. Fowler*.  2002.  Hydroacoustic monitoring of Seismicity at the Slow-Spreading Mid-Atlantic Ridge.  Geophys. Res. Lettr.  29(12): 10-29.

 

FY 2001

Chadwick*, W.W., R.W. Embley, D.S. Scheirer, H.P. Johnson. 2000.  High-Resolution Bathymetric Surveys Scanning Sonars: Relationships Between Hydrothermal Vents! And Geologic Structure At Recent Eruption Sites On The Juan de Fuca RidgeJ. Geophys. Res. 106(B8): 16,075-16,099.

Dziak*.R.P. 2001.  Empirical Relationship Of T-Wave Energy And Fault Parameters Of Northeast Pacific Ocean Earthquakes.  Geophys. Res. Lettr. 28(13): 2537-2540.

Dziak*, R.P., C.G. Fox. A.M. Bobbit*, C. Goldfinger. 2001. Bathymetric Map Of The Gorda Plate: Structural And Geomorphological Process Inferred From Multibeam Surveys. Marine Geophys. Res. 22: 235-250

Dziak*, R.P., C.G. Fox, R.W. Embley, J.L. Nabelek, J. Braunmiller, and R.A. Koski.  1998.  Recent Tectonics Of The Blanco Ridge-Eastern Blanco Transform Fault Zone.  Mar. Geophys. Res.  21(5): 423-450.

Fox, C.G., W.W. Chadwick*, Jr., and R.W. Embley. 2001.  Direct Observation Of A Submarine Volcanic Eruption From A Sea-Floor Instrument Caught In A Lava FlowNature 412: 727-729.

Fox, C.G., H. Matsumoto*, and T.-K. Andy Lau*.  2001.  Monitoring Pacific Ocean Seismicity From An Autonomous Hydrophone Array.  J. Geophys. Res. 106(B3): 4183-4206.

Johnson, H.P., R.P. Dziak*, C. Fisher, C.G. Fox, and M.J. Prius. 2001.  Earthquakes Influence Distant Hydrothermal Vents; The Far-Field Effect And Long-Delayed Responses.  Eos, Trans. AGU, vol. 82, no. 21: 233-236.

Well*, Roland, J. Lupton, and W. Roether.  1999.  Crustal Helium In Deep Pacific Waters.  J. Geophys. Res. 106(C7): 14,165-14,177.

 

FY 2000

Chadwick*, W.W., Jr., R.W. Embley, H.B. Milburn, C. Meinig, and M. Stapp. 1999.  Evidence for deformation associated with the 1998 eruption of Axial Volcano, Juan de Fuca Ridge, From Acoustic Extensometer Measurements.  Geophys. Res. Lettr. 26(23): 3441-3444. doi:10.1029/1999GL900498

Dziak*, R.P. and C.G. Fox.  1999.  The January 1998 earthquake swarm at Axial Volcano, Juan de Fuca Ridge: Hydroacoustic evidence for seafloor volcanic activityGeophys. Res. Lettr. 26(23): 3429-3432.

Dziak*, R.P. and C.G. Fox.  1999.  Long-range seismicity and ground deformation at Axial Volcano, Juan de Fuca RidgeGeophys. Res. Lettr. 26(24): 3641-3644.

Embley, R.W., W.W. Chadwick*, Jr., D. Clague and D. Stakes.  1999.  1998 Eruption at Axial Volcano: Multibeam anomalies and seafloor observations.  Geophys. Res. Lettr. 26(23): 3425-3428.

Embley, R.W., W.W. Chadwick*, Jr., M.R. Perfit, M.C. Smith, and J.R. Delaney.  1999.  Recent eruptions on the CoAxial segment of the Juan de Fuca Ridge: Implications for mid-ocean ridge accretion processes.  J. Geophys. Res. 105(B7): 16,501-16,525.

Johnson, H. P., M. Hutnak, R.P. Dziak*, C.G. Fox, I. Urcuyo, C. Fisher, J.P. Cowen, and J. Nabelek. 1999.  Earthquake-induced changes in a hydrothermal system at the Endeavor Segment, Juan de Fuca RidgeNature 407: 174-176.

Lupton J.E., E.T. Baker, R.W. Embley, R. Greene*, and L. Evans*.  1999.  Anomalous helium and heat signatures associated with the 1998 Axial Volcano Event, Juan de Fuca Ridge.  Geophys. Res. Lettr. 26(23): 3449-3452.

 

FY 1999

Chadwick*, W.W., Jr., R.W. Embley and T. M. Shank.  1998.  The 1996 Gorda Ridge Eruption: Geologic Mapping, Sidescan Sonar, and SeaBeam Comparison ResultsDeep-Sea Res.II 45(12): 2547-2570.

Chadwick*, W.W., Jr.  T.K.P. Gregg, and R.W. Embley. 1998.  Submarine Lineated Sheet Slows: A Secondary Lava Morphology on Subsiding Lava LakesBull. of Volcanology 61: 194-206.

Embley, R.W., Baker, E. 1999. Interdisciplinary Group Explores Seafloor Eruption With Remotely Operated Vehicle. American Geophys. Union, 80(19): 213, 219, 222

Fox, C.G. and A. Bobbitt*.  1999.  NOAA Vents Program GIS Integration, Analysis and Distribution of Multidisciplinary Oceanographic Data, In: Marine and Coastal Geographical Information Systems, D.W. Wright and D. Bartlett (Eds.).

Fox, C.G. and R.P. Dziak*.  1998.  Hydroacoustic Detection of Volcanic Activity on the Gorda Ridge, February-March, 1996Deep-Sea Res.II 45(12): 2513-2530.

Fox, C.G. and R.P. Dziak*.  1999.  Internal Deformation Of The Gorda Plate Observed By Hydroacoustic Monitoring.  J. Geophys. Res. 104(B8): 17,603-17615.

Geophysical Research Letters. 1999. Selected Papers On The 1998 Eruption At Axial Volcano. American Geophys. Union, 26(23-24)

Perfit, M.R. and W.W. Chadwick*, Jr. 1998.  Magmatism At Mid-Ocean Ridges: Constraints From Volcanological And Geochemical Investigations.  Geophys. Monogr. Series 106, Faulting and Magmatism at Mid-Ocean Ridges, W. Roger Buck et al. (Eds.), pp. 59-115.

Slack,P.D., C.G. Fox, R.P. Dziak*.  1999.  P-wave Detection Thresholds, Pn Velocity Estimates, And T-wave Location Uncertainty From Oceanic HydrophonesJ. Geophys. Res. 104(B6): 13,061-13,072.

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