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High-resolution ⁴⁰Ar/³⁹Ar dating of the oldest oceanic basement basalts in the western Pacific basin

Creator:: Koppers, Anthony A. P., Staudigel, Hubert, and Duncan, Robert A.
Abstract:: We report new ⁴⁰Ar/³⁹Ar ages for the oldest Pacific oceanic floor at Ocean Drilling Program Site 801C in the Pigafetta basin and Site 1149D close to the Izu-Bonin subduction zone in the Nadezhda basin. These ages were determined by applying high-resolution incremental heating experiments (including 15–30 heating steps) to better...
Resource Type:: Article
Full Text:: : 1525-2027 Copyright 2003 by the American Geophysical Union 1 of 20 Koppers, A. A. P., H. Staudigel

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:: ; Revised 1 February 2007; Accepted 14 March 2007; Published 16 June 2007. Koppers, A. A. P., H. Staudigel

Vailulu'u Seamount

Creator:: Koppers, Anthony A. P., Staudigel, Hubert, Hart, Stanley R., Young, Craig, and Konter, Jasper G.
Abstract:: Vailulu’u seamount is an active underwater volcano that marks the end of the Samoan hotspot trail (Hart et al., 2000). Vailulu’u has a simple conical morphology (Figure 1) with a largely enclosed volcanic crater at relatively shallow water depths, ranging from 590 m (highest point on the crater rim) to...
Resource Type:: Article
Full Text:: rugosa) to thrive on Nafanua’s summit (Figure 3). REFERENCES Hart, S.R., H. Staudigel, A.A.P. Koppers

Defining the word "Seamount"

Creator:: Staudigel, Hubert, Koppers, Anthony A. P., Lavelle, J. William, Pitcher, Tony J., and Shank, Timothy M.
Abstract:: Reading through this issue of Oceanography, it will become apparent that researchers in different disciplines see their seamounts in quite different ways. The term seamount has been defined many times (e.g., Menard, 1964; Wessel, 2001; Schmidt and Schmincke, 2000; Pitcher et al., 2007; International Hydrographic Organization, 2008; Wessel et al.,...
Resource Type:: Article
Full Text:: Press, San Diego, CA. Staudigel, H., and D.A. Clague. 2010. The geological history of deep-sea

Lō'ihi Seamount

Creator:: Staudigel, Hubert, Moyer, Craig L., Garcia, Michael O., Malahoff, Alex, Clague, David A., and Koppers, Anthony A. P.
Abstract:: Lō`ihi Seamount defines the volcanically active, leading edge in the Hawaiian hotspot chain. It is located on the submarine flank of Mauna Loa, 30 km south of the island of Hawai`i. Lō`ihi’s summit is at 975-m water depth (Pisces Peak), and the seamount has a pronounced southern rift that extends...
Resource Type:: Article
Full Text:: basalt types from Loihi seamount, Hawaii. Geology 10(2):88–92. Staudigel, H., A. Zindler, S.R. Hart, T

Geochronology and geochemistry of low temperature hydrothermal alteration in oceanic crust : an investigation of celadonite in the Troodos ophiolite, Cyprus

Creator:: Gallahan, William E.
Resource Type:: Dissertation
Full Text:: , 1981; Staudigel et al., 1981; Thompson, 1983; Alt and Honnorez, 1984; Seyfried et al., 1986, Vanko

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:: :10.1126/ science.281.5379.978. Fisk, M. R., H. Staudigel, D. C. Smith, and S. A. Haveman (1999), Evidence

Seamount subduction and earthquakes

Creator:: Watts, Anthony B., Koppers, Anthony A. P., and Robinson, David P.
Abstract:: Seamounts are ubiquitous features of the seafloor that form part of the fabric of oceanic crust. When a seamount enters a subduction zone, it has a major affect on forearc morphology, the uplift history of the island arc, and the structure of the downgoing slab. It is not known, however,...
Resource Type:: Article
Full Text:: . Staudigel, H., and D.A. Clague. 2010. The geolog- ical history of deep-sea volcanoes: Biosphere

Prokaryotes associated with marine crust

Creator:: Mason, Olivia Underwood
Abstract:: Oceanic crust covers nearly 70% of the Earth's surface, of which, the upper, sediment layer is estimated to harbor substantial microbial biomass. Marine crust; however, extends several kilometers beyond this surficial layer, and includes the basalt and gabbro layers. In particular, the basalt layer has high permeabilities which allows for...
Resource Type:: Dissertation
Full Text:: . Geochem Geophy Geosy 4: 10.1029/2002GC000387. Furnes, H., and Staudigel, H. (1999) Biological mediation

Microbial alteration of the seafloor

Creator:: Josef, Jennifer A.
Abstract:: In the early 1980's the first evidence of biological alteration of basalt glass (sideromelane) was published. Since that time additional evidence, including DNA staining, isotopic abundance and chemical mapping, has come to light suggesting that this unique alteration of glass can be attributed to microbial activity. Microbial alteration textures have...
Resource Type:: Masters Thesis
Full Text:: and products of dissolution (Thorseth et al., 1995 a; Staudigel et al., 1995 and1998). These initial

ScholarsArchive@OSU

High-resolution ⁴⁰Ar/³⁹Ar dating of the oldest oceanic basement basalts in the western Pacific basin

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

Vailulu'u Seamount

Defining the word "Seamount"

Lō'ihi Seamount

Geochronology and geochemistry of low temperature hydrothermal alteration in oceanic crust : an investigation of celadonite in the Troodos ophiolite, Cyprus

Extent of the microbial biosphere in the oceanic crust

Seamount subduction and earthquakes

Prokaryotes associated with marine crust

Microbial alteration of the seafloor

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