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ScholarsArchive at Oregon State University
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Ocean Drilling Program (ODP) Leg 202 has opened a new window
into understanding late Paleogene and Neogene global environmental
change by providing high-quality sediment sequences from a previously
unsampled region, the eastern South Pacific....
2007 (iso8601)
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Carbonate nodules and associated sediments from Ocean Drilling Program Leg 139 sites of the Middle Valley, Juan de Fuca
Ridge, were studied using a combination of inorganic and organic geochemical techniques. The mineralogy and stable isotopic...
1994 (iso8601)
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High-temperature combustion oxidation measurements of nonvolatile dissolved organic carbon (DOC) have been determined
for pore waters from sediments of Middle Valley, Ocean Drilling Program Leg 139, as well as for overlying and near-bottom...
1994 (iso8601)
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The accelerated diagenesis, maturation, and catagenesis of organic matter to hydrothermal petroleum was studied in sediments
from Ocean Drilling Program Leg 139 in Middle Valley, northern Juan de Fuca Ridge. Sediments at Sites 855 and 856 have...
1994 (iso8601)
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The shallow sections of most holes drilled during Ocean Drilling Program Leg 139 contain alkenones derived from prymnesiophyte
algae. The alkenones indicate a paleotemperature of the photic zone in the upper ocean during primary carbon fixation
of...
1994 (iso8601)
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The sorbed gases at all four Ocean Drilling Program Leg 139 sites (855, 856, 857, and 858) showed the unmistakable presence
of thermogenic hydrocarbons. No indication of abiogenic gas was found. The evidence for the thermogenic hydrocarbons...
1994 (iso8601)
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The fauna of parasitic isopods of the family Bopyridae in Singapore is only poorly known, consisting of only seven species in as many genera in five subfamilies. A new small collection adds four species in as many genera, two of them belonging to...
2009-12-30 (iso8601)
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The data presented in this report demonstrate significant improvements
in the ability to constrain trace element and Sr isotopic
concentrations in sediments overlying ridge-flank hydrothermal
systems. Improved sampling methods orchestrated by the...
2008 (iso8601)
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The exchange of waters between the Pacific and the Southern Oceans
occurs along the eastern boundary of the South Pacific. Because water
masses of the Antarctic provide a connection among the world’s ocean
basins, these water masses maintain the...
2006 (iso8601)
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⁴⁰Ar-³⁹Ar incremental heating experiments were performed on volcanic rocks recovered by drilling during Ocean Drilling
Program Leg 152, southeast Greenland Margin (63°N), and Deep Sea Drilling Project Leg 81, southwest Rockall Plateau
(56°N). Both...
1998 (iso8601)
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Results of ⁴⁰Ar–³⁹Ar Ar dating constrain the age of the submerged volcanic succession, part of the seaward-dip ping reflector
sequence of the Southeast Greenland volcanic rifted margin, recovered during Leg 163. At the 3°Ne 6 drilling transect,...
1999 (iso8601)
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During Ocean Drilling Program Leg 202, detailed shipboard paleomagnetic
measurements at Sites 1233 and 1234 identified a reproducible
high-resolution record of paleomagnetic secular variation (PSV) at
each site. These records also contained...
2006 (iso8601)
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We carried out a detailed rock magnetic and paleomagnetic study of
deep-sea sediments from selected intervals of Site 1233 in order to assess
whether they contain reproducible evidence for submillennial-scale
environmental, climatic, and...
2007 (iso8601)
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The potential for particle size-dependent bioturbation rates was experimentally tested at 1,240
m in the Santa Catalina Basin (eastern Pacific). Spherical glass bead tracers in five size classes (8-
16, 17-31, 32-62, 63-125, and 126-420 μm) were...
1992 (iso8601)
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The social and economic impacts of climate change on the Oregon Coast may be reduced if coastal managers begin planning now to put in place adaptation measures. Oregon Sea Grant conducted a web-based survey of Oregon coastal professionals to...
2010-02-04T23:52:46Z (iso8601)
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The impact of population abundance on the deposit-
feeding rate of Mediomastus ambisetu (Capitellidae:
Polychaeta) was studied in still-water laboratory experiments.
Mean individual pellet production rate (mg worm¯¹ d¯¹) decreased
monotonically...
1998 (iso8601)
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This paper presents a seismic sequence and structural analysis of a
high-resolution three-dimensional seismic reflection survey that was
acquired in June 2000 in preparation for Ocean Drilling Program (ODP)
Leg 204. The seismic data were...
2006 (iso8601)
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Hydrate Ridge is an accretionary thrust ridge located on the lower
slope of the central Cascadia convergent margin. Structural mapping
based on two-dimensional and three-dimensional multichannel seismic
reflection profiles and gridded bathymetry...
2006-10-20 (iso8601)
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During Ocean Drilling Program Leg 204, 80 in situ measurements of
subseafloor temperature were made; 68 of these showed good frictional
pulses on insertion and extraction from the seafloor and were used to
constrain the subsurface temperature....
2006 (iso8601)
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Three successful vertical seismic profiles (VSPs) were acquired during
Ocean Drilling Program (ODP) Leg 204 at South Hydrate Ridge. The
data confirm earlier results from ocean bottom seismometer data and
analysis of moveout from common midpoint...
2006 (iso8601)
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Ocean Drilling Program (ODP) Leg 204 to Hydrate Ridge, located on
the continental slope offshore Oregon (USA), was the first drilling expedition
dedicated to understanding gas hydrate processes in accretionary
complexes and provided a testbed for...
2006 (iso8601)
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We present benthic isotope stratigraphies for Sites 1236, 1237, 1239,
and 1241 that span the late Miocene–Pliocene time interval from 6 to
2.4 Ma. Orbitally tuned timescales were generated for Sites 1237 and
1241 by correlating the high-frequency...
2007 (iso8601)
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Ocean Drilling Program Hole 896A (1°13.01'N, 83°43.39'W) is
in 3440 m of water east of the Galapagos Platform in the equatorial
eastern Pacific Ocean. At this site in 5.9 Ma crust, basement rocks
were recovered over the depth range of 195.1 meters...
1996 (iso8601)
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Within the altered parts of the glass rim of pillow lavas of Hole 896A, at depths at least 432 m below seafloor (237 m below
the top of volcanic basement), microbes have been identified. This is indicated by the size and shapes of alteration...
1996 (iso8601)
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The majority of the Earth's shallow crust is composed of basalt that erupted on the seafloor and was subsequently altered
by chemical exchange with seawater. One aspect of this alteration is the replacement of glass by secondary minerals,...
1996 (iso8601)
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