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  • Ocean Drilling Program; ODP  (3)
  • 171-1050A; Abundance; Age, maximum/old; Age, minimum/young; Blake Nose, North Atlantic Ocean; Comment; Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg171B; Ocean Drilling Program; ODP; Preservation; Sample code/label; Zone from (bottom); Zone to (top)
  • 171-1050C; Blake Nose, North Atlantic Ocean; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg171B; Ocean Drilling Program; ODP; Sample code/label; Uniform resource locator/link to image
  • 2000-2004  (3)
Document type
Keywords
Publisher
Years
Year
  • 1
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    Unknown
    Sapropel cycles in the Mediterranean Sea (2003)
    PANGAEA
    In:  Supplement to: Emeis, Kay-Christian; Schulz, Hartmut; Struck, Ulrich; Rossignol-Strick, Martine; Erlenkeuser, Helmut; Howell, M W; Kroon, Dick; Mackensen, Andreas; Ishizuka, S; Oba, Tadamichi; Sakamoto, Tatsuhiko; Koizumi, Itaru (2003): Eastern Mediterranean surface water temperatures and d18O composition during deposition of sapropels in the late Quaternary. Paleoceanography, 18(1), 1005, https://doi.org/10.1029/2000PA000617
    Details
    Publication Date: 2024-01-09
    Description: Water column stratification increased at climatic transitions from cold to warm periods during the late Quaternary and led to anoxic conditions and sapropel formation in the deep eastern Mediterranean basins. High-resolution data sets on sea-surface temperatures (SST) (estimated from UK'37 indices) and d18O of planktonic foraminifer calcite (d18Ofc) across late Pleistocene sapropel intervals show that d18Ofc decreased (between 1 and 4.6 per mil) and SST increased (between 0.7° and 6.7°C). Maximal d18Oseawater depletion of eastern Mediterranean surface waters at the transition is between 0.5 and 3.0 per mil, and in all but one case exceeded the depletion seen in a western Mediterranean core. The depletion in d18Oseawater is most pronounced at sapropel bases, in agreement with an initial sudden input of monsoon-derived freshwater. Most sapropels coincide with warming trends of SST. The density decrease by initial freshwater input and continued warming of the sea surface pooled fresh water in the surface layer and prohibited deep convection down to ageing deep water emplaced during cold and arid glacial conditions. An exception to this pattern is "glacial" sapropel S6; its largest d18Oseawater depletion (3 per mil) is almost matched by the depletion in the western Mediterranean Sea, and it is accompanied by surface water cooling following an initially rapid warming phase. A second period of significant isotopic depletion is in isotope stage 6 at the 150 kyr insolation maximum. While not expressed as a sapropel due to cold SST, it is in accord with a strengthened monsoon in the southern catchment.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Unknown
    Aragonite content, stable oxygen isotopes of Globigerioides ruber, and age of ODP Site 166-1006 sediments (2000)
    PANGAEA
    In:  Supplement to: Kroon, Dick; Reijmer, John J G; Rendle, Rebecca (2000): Mid- to late-Quaternary variations in the oxygen isotope signature of Globigerinoides ruber at Site 1006 in the western subtropical Atlantic. In: Swart, PK; Eberli, GP; Malone, MJ; Sarg, JF (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 166, 1-10, https://doi.org/10.2973/odp.proc.sr.166.104.2000
    Details
    Publication Date: 2024-01-09
    Description: The 1.4-m.y.-long stable oxygen isotope record of Site 1006 in the low-latitude North Atlantic Ocean shows large glacial/interglacial amplitude changes caused by a combination of temperature and salinity fluctuations. A trend of increased sea-surface temperatures during the interglacial periods is present in the record beginning at isotopic Stage 11 and ultimately leading to the lightest d18O values in isotopic Stages 9, 5, and 1. Maximum d18O values are recorded during glacial isotopic Stages 6 and 8. Stable isotopic variability increased during the Brunhes Chron at the 100-ka time scale. The large amplitude changes can best be explained by global and regional ocean circulation changes. Increased strengthened return flow of warm salty water from the Pacific may have occurred during interglacial periods since isotopic Stage 11, which was largely reduced during glacial periods. The large climate fluctuations had a profound effect on the shallow-water carbonate production of the Great Bahama Bank. The aragonite content of the sediments shows fluctuations that follow the d18O record. The leeward side of the Great Bahama Bank received increased input of platform material during sea-level highstands when the sea-surface waters were warm.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Nannofossil and planktic foraminiferal events of ODP Site 166-1006 sediments (2000)
    PANGAEA
    In:  Supplement to: Kroon, Dick; Williams, Trevor J; Pirmez, Carlos; Spezzaferri, Silvia; Sato, Tokiyuki; Wright, James D (2000): Coupled early Pliocene-middle Miocene bio-cyclostratigraphy of Site 1006 reveals orbitally induced cyclicity patterns of Great Bahama Bank carbonate production. In: Swart, PK; Eberli, GP; Malone, MJ; Sarg, JF (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 166, 1-12, https://doi.org/10.2973/odp.proc.sr.166.127.2000
    Details
    Publication Date: 2024-05-06
    Description: Detailed biostratigraphy in Site 1006 based on planktonic foraminifers and nannofossils shows large-scale sedimentation rate variability in the Florida Strait west of the Great Bahama Bank. A 'floating' cyclostratigraphy based mainly on resistivity logs and magnetic susceptibility data has been fixed to the biostratigraphy in the absence of magnetostratigraphy. The strongest orbital cycle present is the precessional beat, which is present in the borehole logs throughout the record. Counting the cycles resulted in an accurate time scale and thus a sedimentation rate time series. Spectral analysis of the sedimentation rate time series shows that the short-term cycle of eccentricity (~125 k.y.) and the long term cycle of eccentricity (~400 k.y.) are pervasive throughout the Miocene record, together with the long-term ~2-m.y. eccentricity cycle. The Great Bahama Bank produced pulses of shallow carbonate input once every precessional (sea level) cycle during the Miocene and perhaps two pulses per cycle in the early Pliocene. The amount of sediment exported in these pulses appears to be controlled by eccentricity modulation of the precessional amplitude and therefore the amplitude of the sea-level rise. Finally, an increase in sedimentation rate just after the Miocene/Pliocene boundary is attributed to a change in the location and strength of sediment drift currents in the Florida Strait due to reorganization of the currents following the closure of the Panama Isthmus.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 6 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
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