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  • Data  (34)
  • 1990-1994  (34)
  • 1991  (34)
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  • 1990-1994  (34)
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  • 1
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    Calcareous nannofossils of the Celebes and Sulu Seas (1991)
    PANGAEA
    In:  Supplement to: Shyu, Jih-Ping; Müller, Carla (1991): Calcareous nannofossil biostratigraphy of the Celebes and Sulu Seas. In: Silver, EA; Rangin, C; von Breymann, MT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 124, 133-157, https://doi.org/10.2973/odp.proc.sr.124.127.1991
    Details
    Publication Date: 2024-01-09
    Description: Five sites were drilled in the Celebes Sea and Sulu Sea During ODP Leg 124. Sites 767 and 771 in the Celebes Sea are below the regional carbonate compensation depth (CCD) and all calcareous nannofossils recovered in post-Oligocene sediments were recovered from turbidites. From the late middle Eocene to the late Oligocene, Site 771 was above the CCD and accumulated pelagic nannofossil clay. The highest occurrence of Chiasmolithus grandis is just above basement and indicates a late middle Eocene age for the Celebes Basin. In the southeast Sulu Basin, calcareous nannofossils are preserved only in post early middle Miocene sediments and are not useful for estimating the age of the basin. A late Pliocene change in calcareous nannofossil preservation and lithology at Sites 768 and 769 indicate deepening of the CCD. This corresponds to the progressive isolation of the southeast Sulu Basin, which is a consequence of global lowering of sea level and local tectonic adjustment of sill depth. The calcareous nannofossils at all five sites provide a good biostratigraphic framework for the sedimentary histories of the two basins even though some of the fossils were deposited by turbidity currents below the regional CCD, or have been mixed with redeposited specimens. The biostratigraphy record of Sites 767, 768, and 769 show that the lowest occurrence of Gephyrocapsa oceanica s.l. is consistently the nearest datum to the top of the Olduvai paleomagnetic event and, therefore, is the most suitable biohorizon for approximating the Pliocene/Pleistocene Boundary in the Celebes and Sulu Seas.
    Keywords: 124-767B; 124-768B; 124-768C; 124-769A; 124-769B; 124-770B; 124-771A; DRILL; Drilling/drill rig; Joides Resolution; Leg124; Mindanao Sea; Ocean Drilling Program; ODP; Sulu Sea
    Type: Dataset
    Format: application/zip, 12 datasets
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  • 2
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    Isotopic composition of the fine fraction of ODP Site 114-704 (1991)
    PANGAEA
    In:  Supplement to: Mead, Gregory; Hodell, David A; Müller, Daniel W; Ciesielski, Paul F (1991): Fine-fraction carbonate oxygen and carbon isotope results from Site 704: implications for movement of the polar front during the late Pliocene. In: Ciesielski, PF; Kristoffersen, Y; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 114, 437-458, https://doi.org/10.2973/odp.proc.sr.114.152.1991
    Details
    Publication Date: 2024-01-09
    Description: Ocean Drilling Program Site 704 in the subantarctic South Atlantic was drilled to investigate the response of the Southern Ocean to climatic and Oceanographic developments during the late Neogene. Stable oxygen and carbon isotopes of fine-fraction (〈63 µm) carbonate were analyzed to supplement similar analyses of benthic and planktonic foraminifers. The fine fraction is generally composed primarily of coccoliths, and isotopic analyses of the fine fraction were made to complement the foraminiferal analyses. The isotopic curves thus generated suggest paleoceanographic changes not recognizable by the use of benthic and planktonic foraminifers alone. The global Chron 6 carbon isotope shift, found at 253-244 mbsf (6.39-6.0 Ma) at Site 704 in the planktonic and benthic record, is seen in the fine-fraction d13C record as a gradual decrease from 255 mbsf (6.44 Ma) to 210 mbsf (4.24 Ma). At 170 mbsf, mean d18O values of Neogloboquadrina pachyderma increase by 0.6 per mil-0.7 per mil (Hodell and Ciesielski, 1991, doi:10.2973/odp.proc.sr.114.150.1991), reflecting decreased temperature and increased continental ice volume. Accumulation rates increase by 3.3 times above this depth (which corresponds to an age of 2.5 Ma), suggesting increased upwelling and biologic productivity. Carbon isotopic values of fine-fraction carbonate decrease by about 1.5 per mil at 2.6 Ma; however, no change is recorded in the d13C of N. pachyderma. The fine-fraction d13C shift slightly precedes an average l per mil decrease in d13C in benthic foraminifers. The cause of the benthic d13C shift (most likely due to a change in deep water circulation; Hodell and Ciesielski, 1991) is probably not directly related to the fine-fraction shift. The fine-fraction shift is most likely caused by (1) a change in the upwelling to productivity ratio at this site, with increased upwelling bringing lighter carbon to surface waters, more productivity, and higher sedimentation rates and (2) a change in the particle composition of the fine fraction. The increased upwelling is probably due to a northward migration of the Antarctic Polar Front to a position nearer Site 704.
    Keywords: 114-704A; 114-704B; DRILL; Drilling/drill rig; Joides Resolution; Leg114; Ocean Drilling Program; ODP; South Atlantic Ocean
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 3
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    Biostratigraphy and magnetostratigraphy of ODP Leg 124 sites (1991)
    PANGAEA
    In:  Supplement to: Shyu, Jih-Ping; Merrill, Dean L; Hsu, Vindell; Kaminski, Michael Anthony; Müller, Carla; Nederbragt, Alexandra J; Scherer, Reed P; Shibuya, Hidetoshi (1991): Biostratigraphic and magnetostratigraphic synthesis of the Celebes and Sulu Seas, Leg 124. In: Silver, EA; Rangin, C; von Breymann, MT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 124, 1-9, https://doi.org/10.2973/odp.proc.sr.124.171.1991
    Details
    Publication Date: 2024-01-09
    Description: During ODP Leg 124, late middle Eocene to Quaternary sediment sequences were recovered from 13 holes drilled at five sites in the Celebes and Sulu basins. Paleomagnetic measurements and biostratigraphic studies using calcareous nannofossils, planktonic and benthic foraminifers, radiolarians, and diatoms were completed and summarized here. Two Neogene sediment sections recovered in the Sulu Basin yielded excellent core recoveries and magnetic reversal records, allowing direct magnetobiostratigraphic correlations for the Pliocene and Quaternary at Site 768 and for the middle Miocene to Quaternary at Site 769. The interpolated ages of biohorizons are not consistent between sites and only a few of them are in good agreement with previous calibrations. The differences may be the results of redeposition by turbidity currents and selective dissolution of key fossils.
    Keywords: 124-767; 124-768B; 124-768C; 124-769; 124-769A; 124-769B; 124-770; 124-771; COMPCORE; Composite Core; DRILL; Drilling/drill rig; Joides Resolution; Leg124; Mindanao Sea; Ocean Drilling Program; ODP; Sulu Sea
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 4
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    (Table 4) Magnetic reversal datums and biostratigraphy of ODP Site 124-770 (1991)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 124-770; Ageprofile Datum Description; COMPCORE; Composite Core; DEPTH, sediment/rock; Joides Resolution; Leg124; Mindanao Sea; Ocean Drilling Program; ODP
    Type: Dataset
    Format: text/tab-separated-values, 12 data points
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  • 5
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    (Table 3) Magnetic reversal datums and biostratigraphy of ODP Site 124-767 (1991)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 124-767; Ageprofile Datum Description; COMPCORE; Composite Core; DEPTH, sediment/rock; Joides Resolution; Leg124; Mindanao Sea; Ocean Drilling Program; ODP
    Type: Dataset
    Format: text/tab-separated-values, 36 data points
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  • 6
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    (Table 3) Distribution of calcareous nannofossils in ODP Hole 124-770B (1991)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 124-770B; Bramletteius serraculoides; Chiasmolithus grandis; Coccolithus eopelagicus; Coccolithus pelagicus; Coronocyclus nitescens; Cruciplacolithus edwardsii; Cyclicargolithus abisectus; Cyclicargolithus floridanus; Dictyococcites scrippsae; Discoaster barbadiensis; Discoaster binodosus; Discoaster deflandrei; Discoaster saipanensis; Discoaster tanii; Discoaster tanii nodifer; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Epoch; Ericsonia formosa; Ericsonia obruta; Ericsonia subdisticha; Helicosphaera compacta; Helicosphaera euphratis; Helicosphaera recta; Helicosphaera reticulata; Joides Resolution; Lanternithus minutus; Leg124; Mindanao Sea; Nannofossil zone; Nannofossil Zone; Martini, 1971; Ocean Drilling Program; ODP; Pedinocyclus larvalis; Reticulofenestra spp.; Reticulofenestra umbilicus; Sample code/label; Smear slide analysis; Sphenolithus ciperoensis; Sphenolithus distentus; Sphenolithus moriformis; Sphenolithus obtusus; Sphenolithus predistentus; Sphenolithus pseudoradians; Sphenolithus radians; Thoracosphaera spp.; Triquetrorhabdulus carinatus
    Type: Dataset
    Format: text/tab-separated-values, 1216 data points
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  • 7
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    (Table 7) Distribution of calcareous nannofossils in ODP Hole 124-769B (1991)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 124-769B; Calcidiscus leptoporus; Calcidiscus tropicus; Catinaster calyculus; Catinaster coalitus; Ceratolithus cristatus; Ceratolithus rugosus; Ceratolithus telesmus; Coccolithus pelagicus; Cricosphaera quadrilaminata; Cyclicargolithus floridanus; Cyclolithella annulus; Dictyococcites bisectus; Dictyococcites productellus; Discoaster asymmetricus; Discoaster berggrenii; Discoaster blackstockae; Discoaster bollii; Discoaster brouweri; Discoaster calcaris; Discoaster challengerii; Discoaster deflandrei; Discoaster hamatus; Discoaster intercalaris; Discoaster moorei; Discoaster neohamatus; Discoaster neorectus; Discoaster pansus; Discoaster pentaradiatus; Discoaster prepentaradiatus; Discoaster pseudovariabilis; Discoaster quadramus; Discoaster quinqueramus; Discoaster signus; Discoaster subsurculus; Discoaster surculus; Discoaster tamalis; Discoaster triradiatus; Discoaster tristellifer; Discoaster variabilis; Discolithina discopora; Discolithina globulosa; Discolithina japonica; Discolithina multipora; Discolithina syracusana; Discosphaera tubifer; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Emiliania huxleyi; Epoch; Gephyrocapsa, small; Gephyrocapsa caribbeanica; Gephyrocapsa margereli; Gephyrocapsa oceanica; Hayaster perplexus; Helicosphaera carteri; Helicosphaera inversa; Helicosphaera neogranulata; Helicosphaera sellii; Helicosphaera wallichii; Holodiscolithus macroporus; Joides Resolution; Leg124; Lithostromation perdurum; Nannofossil zone; Nannofossil Zone; Martini, 1971; Ocean Drilling Program; ODP; Oolithotus antillarum; Pseudoemiliania lacunosa; Reticulofenestra minuta; Reticulofenestra minutula; Reticulofenestra pseudoumbilicus; Rhabdosphaera clavigera; Sample code/label; Scapholithus fossilis; Scyphosphaera pulcherrima; Scyphosphaera spp.; Smear slide analysis; Sphenolithus abies; Sphenolithus compactus; Sphenolithus grandis; Sphenolithus moriformis; Sphenolithus verensis; Sulu Sea; Syracosphaera lamina; Syracosphaera nodosa; Syracosphaera pulchra; Thoracosphaera spp.; Triquetrorhabdulus rugosus; Umbellosphaera irregularis; Umbilicosphaera sibogae
    Type: Dataset
    Format: text/tab-separated-values, 11537 data points
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  • 8
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    (Table 8) Distribution of calcareous nannofossils in ODP Hole 124-771A (1991)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 124-771A; Amaurolithus bizzarus; Amaurolithus delicatus; Amaurolithus primus; Amaurolithus tricorniculatus; Calcidiscus leptoporus; Calcidiscus tropicus; Catinaster calyculus; Catinaster coalitus; Ceratolithus armatus; Ceratolithus cristatus; Ceratolithus rugosus; Ceratolithus telesmus; Coccolithus miopelagicus; Coccolithus pelagicus; Coronocyclus nitescens; Cricosphaera quadrilaminata; Cyclicargolithus floridanus; Cyclolithella annulus; Dictyococcites antarcticus; Dictyococcites productellus; Discoaster asymmetricus; Discoaster berggrenii; Discoaster blackstockae; Discoaster bollii; Discoaster brouweri; Discoaster calcaris; Discoaster cf. asymmetricus; Discoaster challengerii; Discoaster deflandrei; Discoaster druggii; Discoaster exilis; Discoaster formosus; Discoaster hamatus; Discoaster kugleri; Discoaster moorei; Discoaster musicus; Discoaster neohamatus; Discoaster neorectus; Discoaster pansus; Discoaster pentaradiatus; Discoaster prepentaradiatus; Discoaster pseudovariabilis; Discoaster quadramus; Discoaster quinqueramus; Discoaster signus; Discoaster subsurculus; Discoaster surculus; Discoaster tamalis; Discoaster variabilis; Discolithina discopora; Discolithina japonica; Discolithina multipora; Discolithina syracusana; Discosphaera tubifer; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Epoch; Gephyrocapsa, small; Hayaster perplexus; Helicosphaera burkei; Helicosphaera carteri; Helicosphaera euphratis; Helicosphaera granulata; Helicosphaera intermedia; Helicosphaera mediterranea; Helicosphaera rhomba; Helicosphaera sellii; Holodiscolithus macroporus; Joides Resolution; Leg124; Nannofossil zone; Nannofossil Zone; Martini, 1971; Ocean Drilling Program; ODP; Oolithotus antillarum; Pseudoemiliania lacunosa; Reticulofenestra ampliumbilicus; Reticulofenestra minuta; Reticulofenestra minutula; Reticulofenestra pseudoumbilicus; Rhabdosphaera clavigera; Sample code/label; Scapholithus fossilis; Scyphosphaera pulcherrima; Scyphosphaera spp.; Smear slide analysis; Sphenolithus abies; Sphenolithus compactus; Sphenolithus grandis; Sphenolithus heteromorphus; Sphenolithus moriformis; Sphenolithus verensis; Sulu Sea; Syracosphaera nodosa; Syracosphaera pulchra; Thoracosphaera spp.; Triquetrorhabdulus rugosus
    Type: Dataset
    Format: text/tab-separated-values, 4224 data points
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  • 9
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    (Table 9) Calcareous nannofossil biohorizons and ages of ODP Site 124-769 (1991)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 124-769A; 124-769B; Age model; Ageprofile Datum Description; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Joides Resolution; Leg124; Ocean Drilling Program; ODP; Sulu Sea
    Type: Dataset
    Format: text/tab-separated-values, 37 data points
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  • 10
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    (Table 4) Sedimentation rate and mass accumulation rates of ODP Hole 114-704B (1991)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 114-704B; Accumulation rate, calcium carbonate; Accumulation rate, mass; AGE; Age, maximum/old; Age, minimum/young; Average; Carbonates; Density, dry bulk; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; Joides Resolution; Leg114; Ocean Drilling Program; ODP; Sedimentation rate; South Atlantic Ocean; Standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 226 data points
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