GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1995-1999  (8)
Document type
Keywords
Publisher
Language
Years
Year
  • 1
    Keywords: Datensammlung
    Description / Table of Contents: Oxygen isotope ratios were obtained from authigenic clinoptilolites from Barbados Accretionary Complex, Yamato Basin, and Exmouth Plateau sediments (ODP Sites 672, 797, and 762) in order to investigate the isotopic fractionation between clinoptilolite and pore water at early diagenetic stages and low temperatures. Dehydrated clinoptilolites display isotopic ratios for the zeolite framework (delta 18Of) that extend from +18.7? to +32.8? (vs. SMOW). In combination with associated pore water isotope data, the oxygen isotopic fractionation between clinoptilolite and pore fluids could be assessed in the temperature range from 25?C to 40?C. The resulting fractionation factors of 1.032 at 25?C and 1.027 at 40?C are in good agreement with the theoretically determined oxygen isotope fractionation between clinoptilolite and water. Calculations of isotopic temperatures illustrate that clinoptilolite formation occurred at relatively low temperatures of 17?C to 29?C in Barbados Ridge sediments and at 33?C to 62?C in the Yamato Basin. These data support a low-temperature origin of clinoptilolite and contradict the assumption that elevated temperatures are the main controlling factor for authigenic clinoptilolite formation. Increasing clinoptilolite delta18Of values with depth indicate that clinoptilolites which are now in the deeper parts of the zeolite-bearing intervals had either formed at lower temperatures (17-20?C) or under closed system conditions.
    Type of Medium: Online Resource
    Pages: 3 Datasets , Format: application/zip
    Language: English
    Note: This dataset is supplement to doi:10.1016/S0012-821X(98)00097-1
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1433-4909
    Keywords: Key words Hyperthermophilic ; Crenarchaeota ; Hydrogen and sulfur dependence ; Hydrothermal ; Stetteria hydrogenophila
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A new hyperthermophilic, strictly anaerobic crenarchaeote, Stetteria hydrogenophila DSM11227 representing a new genus within the family of Desulfurococcaceae, was isolated from the sediment of a marine hydrothermal system at Paleohori Bay in Milos, Greece. Cells are gram-negative irregular and disc-shaped cocci, 0.5–1.5 μm in diameter, which are flagellate and can form cytoplasmatic protrusions up to 2 μm in length. The strain grew optimally at 95°C at pH 6.0 and at a NaCl concentration of 3%. The organism grew mixotrophically on peptide substrates. It required elemental sulfur as an external electron acceptor, and in addition, its growth was completely dependent on the presence of molecular hydrogen. Sulfur could be replaced by thiosulfate. H2S, CO2, acetate, and ethanol were identified as products of metabolism. The G + C content of DNA was 65 mol%. Analysis of its phylogenetic position by sequence analysis of 16S rRNA placed this organism in the family of Desulfurococcaceae. The dependence of this organism on both hydrogen and sulfur during growth on peptide substrates distinguishes Stetteria from all previously described species of Crenarchaeota.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2024-01-09
    Keywords: 110-672A; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Fractionation factor; Joides Resolution; Leg110; Mass spectrometer Finnigan MAT 251; Ocean Drilling Program; ODP; Sample code/label; South Atlantic Ocean; Temperature, calculated; Temperature, in rock/sediment; Temperature, standard deviation; δ18O
    Type: Dataset
    Format: text/tab-separated-values, 54 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2024-01-09
    Keywords: 122-762B; 122-762C; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Fractionation factor; Joides Resolution; Leg122; Mass spectrometer Finnigan MAT 251; Ocean Drilling Program; ODP; Sample code/label; South Indian Ridge, South Indian Ocean; Temperature, calculated; Temperature, in rock/sediment; Temperature, standard deviation; δ18O
    Type: Dataset
    Format: text/tab-separated-values, 93 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2024-01-09
    Keywords: 127-797B; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Fractionation factor; Japan Sea; Joides Resolution; Leg127; Mass spectrometer Finnigan MAT 251; Ocean Drilling Program; ODP; Sample code/label; Temperature, calculated; Temperature, in rock/sediment; Temperature, standard deviation; δ18O
    Type: Dataset
    Format: text/tab-separated-values, 36 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 6
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Nähr, Thomas H; Botz, Reiner; Bohrmann, Gerhard; Schmidt, Mark (1998): Oxygen isotopic composition of low-temperature authigenic clinoptilolite. Earth and Planetary Science Letters, 160(3-4), 369-381, https://doi.org/10.1016/S0012-821X(98)00097-1
    Publication Date: 2024-01-09
    Description: Oxygen isotope ratios were obtained from authigenic clinoptilolites from Barbados Accretionary Complex, Yamato Basin, and Exmouth Plateau sediments (ODP Sites 672, 797, and 762) in order to investigate the isotopic fractionation between clinoptilolite and pore water at early diagenetic stages and low temperatures. Dehydrated clinoptilolites display isotopic ratios for the zeolite framework (delta 18Of) that extend from +18.7 per mil to +32.8 per mil (vs. SMOW). In combination with associated pore water isotope data, the oxygen isotopic fractionation between clinoptilolite and pore fluids could be assessed in the temperature range from 25ºC to 40ºC. The resulting fractionation factors of 1.032 at 25ºC and 1.027 at 40ºC are in good agreement with the theoretically determined oxygen isotope fractionation between clinoptilolite and water. Calculations of isotopic temperatures illustrate that clinoptilolite formation occurred at relatively low temperatures of 17ºC to 29ºC in Barbados Ridge sediments and at 33ºC to 62ºC in the Yamato Basin. These data support a low-temperature origin of clinoptilolite and contradict the assumption that elevated temperatures are the main controlling factor for authigenic clinoptilolite formation. Increasing clinoptilolite delta18Of values with depth indicate that clinoptilolites which are now in the deeper parts of the zeolite-bearing intervals had either formed at lower temperatures (17-20ºC) or under closed system conditions.
    Keywords: 110-672A; 122-762B; 122-762C; 127-797B; DRILL; Drilling/drill rig; Japan Sea; Joides Resolution; Leg110; Leg122; Leg127; Ocean Drilling Program; ODP; South Atlantic Ocean; South Indian Ridge, South Indian Ocean
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2024-02-03
    Keywords: 2,2-Dimethylbutane; 2,3-Methylpentane; Al-Wajh Deep; Area/locality; Atlantis II Deep; DEPTH, sediment/rock; Elevation of event; Ethane; Ethene; Event label; Gas chromatography; Gases, dissolved; GIK/IfG; GIK17022-2; GIK17032-1; GIK17036-1; GIK17036-2; GIK17037-2; GIK17037-4; GIK17038-16; GIK17038-5; GIK17038-7; GIK17038-8; GIK17038-9; GIK17040-2; GIK17041-2; Institute for Geosciences, Christian Albrechts University, Kiel; i-Propanol; Isobutane; KAL; Kasten corer; Kebrit Deep; Latitude of event; Longitude of event; Methane; MUC; MultiCorer; n-Butane; n-Hexane; North Al-Wajh Deeps; Optional event label; Propane; Red Sea; ROTES MEER; Sample mass; SO121; SO121_16; SO121_48; SO121_58; SO121_59; SO121_62; SO121_64; SO121_70; SO121_72; SO121_75; SO121_76; SO121_86; SO121_91; SO121_93; SO121_96; SO121-96; Sonne; Umm Lajj Deep
    Type: Dataset
    Format: text/tab-separated-values, 315 data points
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2024-03-25
    Description: The Red Sea is a very young ocean, and is one of the most interesting areas on Earth (ocean in statu nascendi). It is the only ocean where hydrothermal activity associated with ore formation occurs in a sterile environment (anoxic, hot, saline). In addition, its geographical position means that it is predestined to record the monsoonal history of the region in detailed sedimentary sequences. The major aim of the present project is to investigate the dynamics of hydrothermal systems in selected Deeps (Atlantis-II, Discovery, Kebrit, Al Wajh), Additional palaeoceanographic and microbiological questions should also be addressed. Specific aims are: 1. To study the hydrographic changes in individual Deeps (hydrothermal region Atlantis-II) and to investigate the causes of the temperature increase in the last few years (increased heat flow - higher temperature of the brine supply - higher brine flow rates?). 2.a. To document the influence of the hydrothermal systems on the sedimentary organic matter in the Deeps. In particular, the thermogenic production and migration of hydrocarbons in the sediments will be studied. The complex formation mechanisms (bacterial, thermogenic) of short-chain hydrocarbons (trace gases) will also be examined, 2.b. in addition, the polar and macromolecular fraction in samples from the various deeps will be studied in order to elucidate the formation, structure and source of the macromolecular oil fraction. 3. To clarify the palaeoceanographic conditions, sea-level changes and the climatic history (relationship of the circulation system and nutrient supply to the monsoon) of the southern Red Sea. 4. To separate microorganisms from the brines and to characterise them in terms of their metabolic physiology and ecology, and to describe their taxonomy.
    Keywords: Al-Wajh Deep; Atlantis II Deep; Chain Deep; CTD/Rosette; CTD-RO; Discovery Deep; Dredge; DRG; GIK/IfG; GIK17016-1; GIK17017-1; GIK17017-2; GIK17017-3; GIK17017-4; GIK17017-5; GIK17017-6; GIK17017-7; GIK17017-8; GIK17020-1; GIK17021-1; GIK17021-2; GIK17022-2; GIK17023-1; GIK17023-2; GIK17023-3; GIK17023-4; GIK17023-5; GIK17023-6; GIK17023-7; GIK17024-1; GIK17025-1; GIK17026-1; GIK17026-2; GIK17026-3; GIK17026-4; GIK17026-5; GIK17026-6; GIK17026-8; GIK17027-1; GIK17027-2; GIK17028-1; GIK17029-1; GIK17029-2; GIK17029-3; GIK17029-4; GIK17029-5; GIK17029-6; GIK17029-7; GIK17032-1; GIK17034-1; GIK17034-2; GIK17034-3; GIK17036-1; GIK17036-2; GIK17036-3; GIK17037-2; GIK17037-4; GIK17038-1; GIK17038-10; GIK17038-11; GIK17038-12; GIK17038-13; GIK17038-14; GIK17038-16; GIK17038-2; GIK17038-3; GIK17038-4; GIK17038-5; GIK17038-6; GIK17038-7; GIK17038-8; GIK17038-9; GIK17039-1; GIK17039-2; GIK17039-3; GIK17040-2; GIK17041-2; GIK17042-2; Institute for Geosciences, Christian Albrechts University, Kiel; KAL; Kasten corer; Kebrit Deep; MUC; MultiCorer; North Al-Wajh Deeps; Red Sea; ROTES MEER; SO121; SO121_1; SO121_10; SO121_11; SO121_12; SO121_13; SO121_14; SO121_16; SO121_17; SO121_18; SO121_19; SO121_2; SO121_20; SO121_21; SO121_22; SO121_23; SO121_24; SO121_25; SO121_26; SO121_27; SO121_28; SO121_29; SO121_30; SO121_31; SO121_33; SO121_35; SO121_36; SO121_37; SO121_38; SO121_39; SO121_4; SO121_40; SO121_41; SO121_42; SO121_43; SO121_44; SO121_48; SO121_53; SO121_55; SO121_56; SO121_58; SO121_59; SO121_6; SO121_62; SO121_64; SO121_66; SO121_67; SO121_68; SO121_69; SO121_7; SO121_70; SO121_71; SO121_72; SO121_75; SO121_76; SO121_77; SO121_78; SO121_79; SO121_8; SO121_80; SO121_81; SO121_86; SO121_87; SO121_88; SO121_89; SO121_9; SO121_91; SO121_93; SO121_95; SO121_96; SO121-96; Sonne; Umm Lajj Deep
    Type: Dataset
    Format: application/zip, 19 datasets
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...