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  1. Buch ; Konferenzbeitrag ; Online: Wet and dry resistivities along three orthogonal directions of ODP Holes 185-801C and 185-1149B, supplementary data to: Hirono, Tetsuro; Abrams, Lewis J (2002): Data report: Electrical resistivity and X-ray computed tomography measurements of sedimentary and igneous units from Hole 801C and Site 1149. In: Ludden, JN; Plank, T; Escutia, C (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 185, 1-18

    Hirono, Tetsuro / Abrams, Lewis J

    2002  

    Abstract: The results of shore-based three-axis resistivity and X-ray computed tomography (CT) measurements on cube-shaped samples recovered during Leg 185 are presented along with moisture and density, P-wave velocity, resistivity, and X-ray CT measurements on ... ...

    Abstract The results of shore-based three-axis resistivity and X-ray computed tomography (CT) measurements on cube-shaped samples recovered during Leg 185 are presented along with moisture and density, P-wave velocity, resistivity, and X-ray CT measurements on whole-round samples of representative lithologies from Site 1149. These measurements augment the standard suite of physical properties obtained during Leg 185 from the cube samples and samples obtained adjacent to the cut cubes. Both shipboard and shore-based measurements of physical properties provide information that assists in characterizing lithologic units, correlating cored material with downhole logging data, understanding the nature of consolidation, and interpreting seismic reflection profiles.
    Sprache Englisch
    Erscheinungsverlauf 2002-9999
    Umfang Online-Ressource
    Verlag PANGAEA - Data Publisher for Earth & Environmental Science
    Erscheinungsort Bremen/Bremerhaven
    Dokumenttyp Buch ; Konferenzbeitrag ; Online
    Anmerkung This dataset is supplement to doi:10.2973/odp.proc.sr.185.005.2002
    DOI 10.1594/PANGAEA.784120
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  2. Buch ; Konferenzbeitrag ; Online: Susceptibility, density, iron and calcium concentrations of ODP holes 165-999B and 165-1001A, supplementary data to: R?hl, Ursula; Abrams, Lewis J (2000): High-resolution, downhole, and nondestructive core measurements from Sites 999 and 1001 in the Caribbean Sea: application to the Late Paleocene Thermal Maximum. In: Leckie, RM; Sigurdsson, H; Acton, GD; Draper, G (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 165, 191-203

    R?hl, Ursula / Abrams, Lewis J

    2000  

    Abstract: Pelagic sediments recording an extreme and short-lived global warming event, the Late Paleocene Thermal Maximum (LPTM), were recovered from Hole 999B (Colombian Basin) and Holes 1001A and 1001B (lower Nicaraguan Rise) in the Caribbean Sea during Ocean ... ...

    Abstract Pelagic sediments recording an extreme and short-lived global warming event, the Late Paleocene Thermal Maximum (LPTM), were recovered from Hole 999B (Colombian Basin) and Holes 1001A and 1001B (lower Nicaraguan Rise) in the Caribbean Sea during Ocean Drilling Program Leg 165. The LPTM consists of a 0.3-0.97 m calcareous claystone to claystone horizon. High-resolution downhole logging (Formation MicroScanner [FMS]), standard downhole logs (resistivity, velocity, density, natural gamma ray, and geochemical log), and non-destructive chemical and physical property (multisensor core logger [MSCL] and X-ray fluorescence [XRF] core scanner) data were used to identify composite sections from parallel holes and to record sedimentological and environmental changes associated with the LPTM.
    Downhole logging data indicate an abrupt and distinct difference in physical and chemical properties that extend for tens of meters above and below the LPTM. These observations indicate a rapid environmental change at the LPTM, which persists beyond the LPTM anomaly. Comparisons of gamma-ray attenuation porosity evaluator (GRAPE) densities from MSCL logging on split cores with FMS resistivity values allows core-to-log correlation with a high degree of accuracy. High-resolution magnetic susceptibility measurements of the cores are compared with elemental concentrations (e.g., Fe, Ca) analyzed by high-resolution XRF scanning.
    The high-resolution data obtained from several detailed core and downhole logging methods are the key to the construction of composite sections, the correlation of both adjacent holes and distant sites, and core-log integration. These continuous-depth series reveal the LPTM as a multiphase event with a nearly instantaneous onset, followed by a much different set of physical and chemical conditions of short duration, succeeded by a longer transition to a new, more permanent set of environmental circumstances. The estimated duration of these 'phases' are consistent with paleontological and isotopic studies of the LPTM
    Sprache Englisch
    Erscheinungsverlauf 2000-9999
    Umfang Online-Ressource
    Verlag PANGAEA - Data Publisher for Earth & Environmental Science
    Erscheinungsort Bremen/Bremerhaven
    Dokumenttyp Buch ; Konferenzbeitrag ; Online
    Anmerkung This dataset is supplement to doi:10.2973/odp.proc.sr.165.009.2000
    DOI 10.1594/PANGAEA.735009
    Datenquelle Katalog der Technische Informationsbibliothek Hannover

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  3. Artikel: Subseafloor sedimentary life in the South Pacific Gyre

    D'Hondt, Steven / Spivack, Arthur J / Pockalny, Robert / Ferdelman, Timothy G / Fischer, Jan P / Kallmeyer, Jens / Abrams, Lewis J / Smith, David C / Graham, Dennis / Hasiuk, Franciszek / Schrum, Heather / Stancin, Andrea M

    Proceedings of the National Academy of Sciences of the United States of America. 2009 July 14, v. 106, no. 28

    2009  

    Abstract: The low-productivity South Pacific Gyre (SPG) is Earth's largest oceanic province. Its sediment accumulates extraordinarily slowly (0.1-1 m per million years). This sediment contains a living community that is characterized by very low biomass and very ... ...

    Abstract The low-productivity South Pacific Gyre (SPG) is Earth's largest oceanic province. Its sediment accumulates extraordinarily slowly (0.1-1 m per million years). This sediment contains a living community that is characterized by very low biomass and very low metabolic activity. At every depth in cored SPG sediment, mean cell abundances are 3 to 4 orders of magnitude lower than at the same depths in all previously explored subseafloor communities. The net rate of respiration by the subseafloor sedimentary community at each SPG site is 1 to 3 orders of magnitude lower than the rates at previously explored sites. Because of the low respiration rates and the thinness of the sediment, interstitial waters are oxic throughout the sediment column in most of this region. Consequently, the sedimentary community of the SPG is predominantly aerobic, unlike previously explored subseafloor communities. Generation of H₂ by radiolysis of water is a significant electron-donor source for this community. The per-cell respiration rates of this community are about 2 orders of magnitude higher (in oxidation/reduction equivalents) than in previously explored anaerobic subseafloor communities. Respiration rates and cell concentrations in subseafloor sediment throughout almost half of the world ocean may approach those in SPG sediment.
    Schlagwörter biomass ; hydrogen ; oceans ; oxidation ; respiratory rate ; sediments
    Sprache Englisch
    Erscheinungsverlauf 2009-0714
    Umfang p. 11651-11656.
    Erscheinungsort National Academy of Sciences
    Dokumenttyp Artikel
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.0811793106
    Datenquelle NAL Katalog (AGRICOLA)

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  4. Artikel ; Online: Subseafloor sedimentary life in the South Pacific Gyre.

    D'Hondt, Steven / Spivack, Arthur J / Pockalny, Robert / Ferdelman, Timothy G / Fischer, Jan P / Kallmeyer, Jens / Abrams, Lewis J / Smith, David C / Graham, Dennis / Hasiuk, Franciszek / Schrum, Heather / Stancin, Andrea M

    Proceedings of the National Academy of Sciences of the United States of America

    2009  Band 106, Heft 28, Seite(n) 11651–11656

    Abstract: The low-productivity South Pacific Gyre (SPG) is Earth's largest oceanic province. Its sediment accumulates extraordinarily slowly (0.1-1 m per million years). This sediment contains a living community that is characterized by very low biomass and very ... ...

    Abstract The low-productivity South Pacific Gyre (SPG) is Earth's largest oceanic province. Its sediment accumulates extraordinarily slowly (0.1-1 m per million years). This sediment contains a living community that is characterized by very low biomass and very low metabolic activity. At every depth in cored SPG sediment, mean cell abundances are 3 to 4 orders of magnitude lower than at the same depths in all previously explored subseafloor communities. The net rate of respiration by the subseafloor sedimentary community at each SPG site is 1 to 3 orders of magnitude lower than the rates at previously explored sites. Because of the low respiration rates and the thinness of the sediment, interstitial waters are oxic throughout the sediment column in most of this region. Consequently, the sedimentary community of the SPG is predominantly aerobic, unlike previously explored subseafloor communities. Generation of H(2) by radiolysis of water is a significant electron-donor source for this community. The per-cell respiration rates of this community are about 2 orders of magnitude higher (in oxidation/reduction equivalents) than in previously explored anaerobic subseafloor communities. Respiration rates and cell concentrations in subseafloor sediment throughout almost half of the world ocean may approach those in SPG sediment.
    Mesh-Begriff(e) Animals ; Biodiversity ; Biomass ; Energy Metabolism/physiology ; Geologic Sediments/microbiology ; Hydrogen/metabolism ; Oceanography ; Pacific Ocean
    Chemische Substanzen Hydrogen (7YNJ3PO35Z)
    Sprache Englisch
    Erscheinungsdatum 2009-06-26
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 209104-5
    ISSN 1091-6490 ; 0027-8424
    ISSN (online) 1091-6490
    ISSN 0027-8424
    DOI 10.1073/pnas.0811793106
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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