Index Catalog // ScholarsArchive@OSU

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:: trails, Gulf of Alaska Jason D. Chaytor College of Oceanic and Atmospheric Sciences, Oregon State

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,...
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Full Text:: Gilbert Ridge and Tokelau Seamount Trail and the timing of the Hawaii- Emperor Bend Anthony A. P. Koppers

Creator:: Spinelli, G. A. and Harris, R. N.
Abstract:: We examine the thermal effects of seamount subduction. Seamount subduction may cause transient changes in oceanic crust hydrogeology and plate boundary fault position. Prior to subduction, seamounts provide high-permeability pathways between the basaltic crustal aquifer and overlying ocean that can focus fluid flow and efficiently cool the oceanic crust. As...
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Full Text:: seamount subduction: Temperatures in the Nankai Trough Seismogenic Zone Experiment transect, Japan G. A

Creator:: Koppers, Anthony A. P., Staudigel, Hubert, Pringle, Malcolm S., and Wijbrans, Jan R.
Abstract:: South Pacific intraplate volcanoes have been active since the Early Cretaceous. Their HIMU-EMI-EMII mantle sources can be traced back into the West Pacific Seamount Province (WPSP) using plate tectonic reconstructions, implying that these distinctive components are enduring features within the Earth's mantle for, at least, the last 120 Myr. These...
Resource Type:: Article
Full Text:: volcanism in the South Pacific: Hot spots or extensional volcanism? Anthony A. P. Koppers and Hubert

Creator:: Li, Chun-Feng, Xu, Xing, Lin, Jian, Sun, Zhen, Zhu, Jian, Yao, Yongjian, Zhao, Xixi, Liu, Qingsong, Kulhanek, Denise K., Wang, Jian, Song, Taoran, Zhao, Junfeng, Qiu, Ning, Guan, Yongxian, Zhou, Zhiyuan, Williams, Trevor, Bao, Rui, Briais, Anne, Brown, Elizabeth A., Chen, Yifeng, Clift, Peter D., Colwell, Frederick S., Dadd, Kelsie A., Ding, Weiwei, Almeida, Iván Hernández, Huang, Xiao‐Long, Hyun, Sangmin, Jiang, Tao, Koppers, Anthony A. P., Li, Qianyu, Liu, Chuanlian, Liu, Zhifei, Nagai, Renata H., Peleo‐Alampay, Alyssa, Su, Xin, Tejada, Maria Luisa G., Trinh, Hai Son, Yeh, Yi‐Ching, Zhang, Chuanlun, Zhang, Fan, and Zhang, Guo‐Liang
Abstract:: Combined analyses of deep tow magnetic anomalies and International Ocean Discovery Program Expedition 349 cores show that initial seafloor spreading started around 33 Ma in the northeastern South China Sea (SCS), but varied slightly by 1-2 Myr along the northern continent-ocean boundary (COB). A southward ridge jump of ∼20 km...
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Full Text:: Zhao4, Ning Qiu4, Yongxian Guan2, Zhiyuan Zhou1, Trevor Williams7, Rui Bao8, Anne Briais9, Elizabeth A

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...
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Full Text:: / 2006GC001242. Hutnak,M., A. T. Fisher, R.Harris, C. Stein, K.Wang,G. Spinelli, M. Schindler, H. Villinger, and

Creator:: Harris, Robert N., Grevemeyer, Ingo, and Ranero, César R.
Abstract:: The thermal structure of convergent margins provides information related to the tectonics, geodynamics, metamorphism, and fluid flow of active plate boundaries. We report 176 heat flow measurements made with a violin bow style probe across the Costa Rican margin at the Middle America Trench. The probe measurements are collocated with...
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Full Text:: measurements made with a violin bow style probe across the Costa Rican margin at the Middle America Trench. The

Creator:: Harris, Robert N., Spinelli, Glenn, and Ranero, César R.
Abstract:: At the Costa Rica margin along the Middle America Trench along‐strike variations in heat flow are well mapped. These variations can be understood in terms of either ventilated fluid flow, where exposed basement allows fluids to freely advect heat between the crustal aquifer and ocean, or insulated fluid flow where...
Resource Type:: Article
Full Text:: System Guest Editors: G. Alvarado, K. Hoernle, and E. Silver 1. Introduction [2] A major endeavor over

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