Index Catalog // ScholarsArchive@OSU

Seamount morphology in the Bowie and Cobb hot spot trails, Gulf of Alaska

Creator:: Chaytor, Jason D., Keller, Randall A., Duncan, Robert A., and Dziak, Robert P.
Abstract:: Full-coverage multibeam bathymetric mapping of twelve seamounts in the Gulf of Alaska reveals that they are characterized by flat-topped summits (rarely with summit craters) and by terraced, or step-bench, flanks. These summit plateaus contain relict volcanic features (e.g., flow levees, late-stage cones, and collapse craters) and as such must have...
Resource Type:: Article
Full Text:: , Corvallis, Oregon 97331, USA Robert A. Duncan College of Oceanic and Atmospheric Sciences, Oregon State

Evolution of the northeast Labrador Sea during the last interglaciation

Creator:: Winsor, Kelsey, Carlson, Anders E., Klinkhammer, Gary P., Stoner, Joseph S., and Hatfield, Robert G.
Abstract:: Boreal summer insolation during the last interglaciation (LIG) generally warmed the subpolar to polar Northern Hemisphere more than during the early Holocene, yet regional climate variations between the two periods remain. We investigate northeast Labrador Sea subsurface temperature and hydrography across terminations (T) I and II and during the LIG...
Resource Type:: Article
Full Text:: Gary P. Klinkhammer, Joseph S. Stoner, and Robert G. Hatfield College of Earth, Ocean, and Atmospheric

Radiometric ages for basement rocks from the Emperor Seamounts, ODP Leg 197

Creator:: Duncan, Robert A. and Keller, Randall A.
Abstract:: The Hawaiian-Emperor seamount chain is the ‘‘type’’ example of an age-progressive, hot spotgenerated intraplate volcanic lineament. However, our current knowledge of the age distribution within this province is based largely on radiometric ages determined several decades ago. Improvements in instrumentation, sample preparation methods, and new material obtained by recent drilling...
Resource Type:: Article
Full Text:: Emperor Seamounts, ODP Leg 197 Robert A. Duncan and Randall A. Keller College of Oceanic and Atmospheric

Interactions between deformation and fluids in the frontal thrust region of the NanTroSEIZE transect offshore the Kii Peninsula, Japan: Results from IODP Expedition 316 Sites C0006 and C0007

Creator:: Sceaton, E., Kimura, G., Curewitz, D., Moore, G., Chester, F., Fabbri, O., Fergusson, C., Girault, F., Goldsby, D., Harris, Robert N., Inagaki, F., Jiang, T., Kitamura, Y., Knuth, M., Li, C.-F., Claesson Liljedahl, L., Louis, L., Milliken, K., Nicholson, U., Riedinger, N., Sakaguchi, A., Solomon, E., Stasser, M., Su, X., Tsutsumi, A., Yamaguchi, A., Ujiee, K., and Zhao, X.
Abstract:: Integrated Ocean Drilling Program (IODP) Expedition 316 Sites C0006 and C0007 examined the deformation front of the Nankai accretionary prism offshore the Kii Peninsula, Japan. In the drilling area, the frontal thrust shows unusual behavior as compared to other regions of the Nankai Trough. Drilling results, integrated with observations from...
Resource Type:: Article
Full Text:: , College Station, Texas 77843-3115, USA O. Fabbri Department of Geosciences, University of Franche-Comte

Nonlinear ⁴⁰Ar/³⁹Ar age systematics along the Gilbert Ridge and Tokelau Seamount Trail and the timing of the Hawaii-Emperor Bend

Creator:: Koppers. Anthony A. P., Staudigel, Hubert, Morgan, Jason Phipps, and Dunca, Robert A.
Abstract:: Over the last three decades the first-order correlation in morphology and orientation of seamount trails has been called upon to support the concept of a ‘‘fixed’’ Pacific hot spot frame of reference and to explain the Hawaii-Emperor bend (HEB) by a dramatic change in Pacific plate motion. In this paper,...
Resource Type:: Article
Full Text:: Robert A. Duncan College of Oceanic and Atmospheric Sciences, Oregon State University, 104 COAS

Implications of a nonlinear ⁴⁰Ar/³⁹Ar age progression along the Louisville seamount trail for models of fixed and moving hot spots

Creator:: Koppers, Anthony A. P., Duncan, Robert A., and Steinberger, Bernhard
Abstract:: The Louisville seamount trail has been recognized as one of the key examples of hot spot volcanism, comparable to the classic volcanic Hawaiian-Emperor lineaments. The published total fusion ⁴⁰Ar/³⁹Ar data of Watts et al. [1988] showed an astonishing linear age progression, firmly establishing Louisville as a fixed hot spot in...
Resource Type:: Article
Full Text:: California, San Diego, La Jolla, CA 92093-0225, USA (akoppers@ucsd.edu) Robert A. Duncan College of Oceanic

Spatial and temporal distribution of a C-like asthenoshpheric component in the Rano Rahi Seamount Field, East Pacific Rise, 15°-19°S

Creator:: Hall, L. S., Mahoney, J. J., Sinton, J. M., and Duncan, Robert A.
Abstract:: Lavas of the Rano Rahi seamount field define a Nd-Pb-Sr isotopic array that connects, and substantially overlaps, the arrays of the nearby East Pacific Rise axis and 5.6–28 Ma lavas of the Pukapuka ridge system, situated between the seamount field and French Polynesia. Dating of Rano Rahi samples by ⁴⁰Ar-³⁹Ar...
Resource Type:: Article
Full Text:: en t C o n ce n tr at io n s D et er m in ed b y IC P -M S a S r Y Z r N b B a L a C e P r

Extent of the microbial biosphere in the oceanic crust

Creator:: Heberling, Cara, Lowell, Robert P., Liu, lei, and Fisk, Martin R.
Abstract:: We estimate the depth of the 120°C isotherm by constructing crustal thermal gradients based on theoretical and observed conductive heat flux as a function of lithospheric age. We chose the 120°C isotherm because it is close to the upper limit for prokaryotic life, and therefore, the isotherm approximates the maximum...
Resource Type:: Article
Full Text:: Cara Heberling and Robert P. Lowell Department of Geosciences, Virginia Polytechnic Institute and State

Acoustics variability of air gun signals recorded at intermediate ranges within the Lau Basin

Creator:: Bohnenstiehl, DelWayne R., Scheip, Corey M., Matsumoto, Haru, and Dziak, Robert P.
Abstract:: During January–February 2009, an active-source seismic survey was performed over the Eastern Lau Spreading Center in the Lau Back-Arc Basin (21°S, 176°S). Acoustic signals generated by the R/V Langseth's 36-gun pneumatic source array were recorded within the deep sound channel at offsets of 29–416 km. The local ocean acoustic environment...
Resource Type:: Article
Full Text:: (drbohnen@ncsu.edu) Haru Matsumoto and Robert P. Dziak Hatfield Marine Science Center, Oregon State

Heat flow along the NanTroSEIZE transect: Results from IODP Expeditions 315 and 316 offshore the Kii Peninsula, Japan

Creator:: Harris, Robert N., Schmidt‐Schierhorn, Friederike, and Spinelli, Glenn
Abstract:: [1] We report detailed thermal measurements undertaken during Integrated Ocean Drilling Program (IODP) Expeditions 315 and 316 along the Nankai Trough Seismogenic Zone Experiment (NanTroSEIZE) transect offshore the Kii Peninsula, Japan. Geothermal objectives included determining thermophysical rock properties of the cored material and characterizing the background thermal regime along this...
Resource Type:: Article
Full Text:: IODP Expeditions 315 and 316 offshore the Kii Peninsula, Japan Robert N. Harris College of Oceanic and

ScholarsArchive@OSU

Seamount morphology in the Bowie and Cobb hot spot trails, Gulf of Alaska

Evolution of the northeast Labrador Sea during the last interglaciation

Radiometric ages for basement rocks from the Emperor Seamounts, ODP Leg 197

Interactions between deformation and fluids in the frontal thrust region of the NanTroSEIZE transect offshore the Kii Peninsula, Japan: Results from IODP Expedition 316 Sites C0006 and C0007

Nonlinear ⁴⁰Ar/³⁹Ar age systematics along the Gilbert Ridge and Tokelau Seamount Trail and the timing of the Hawaii-Emperor Bend

Implications of a nonlinear ⁴⁰Ar/³⁹Ar age progression along the Louisville seamount trail for models of fixed and moving hot spots

Spatial and temporal distribution of a C-like asthenoshpheric component in the Rano Rahi Seamount Field, East Pacific Rise, 15°-19°S

Extent of the microbial biosphere in the oceanic crust

Acoustics variability of air gun signals recorded at intermediate ranges within the Lau Basin

Heat flow along the NanTroSEIZE transect: Results from IODP Expeditions 315 and 316 offshore the Kii Peninsula, Japan

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