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  • 2010-2014  (268)
  • 1990-1994  (21)
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  • 1
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    Unbekannt
    Integrated Ocean Drilling Program Management International, Inc.
    In:  Proceedings of the Integrated Ocean Drilling Program, 320/321 . Integrated Ocean Drilling Program Management International, Inc., Tokyo, Japan, Diverse Zählungen pp.
    Publikationsdatum: 2019-06-25
    Beschreibung: Integrated Ocean Drilling Program Expedition 320/321, "Pacific Equatorial Age Transect" (Sites U1331–U1338), was designed to recover a continuous Cenozoic record of the equatorial Pacific by coring above the paleoposition of the Equator at successive crustal ages on the Pacific plate. These sediments record the evolution of the equatorial climate system throughout the Cenozoic. As we gained more information about the past movement of plates and when in Earth's history "critical" climate events took place, it became possible to drill an age transect ("flow-line") along the position of the paleoequator in the Pacific, targeting important time slices where the sedimentary archive allows us to reconstruct past climatic and tectonic conditions. The Pacific Equatorial Age Transect (PEAT) program cored eight sites from the sediment surface to basement, with basalt aged between 53 and 18 Ma, covering the time period following maximum Cenozoic warmth, through initial major glaciations, to today. The PEAT program allows the reconstruction of extreme changes of the calcium carbonate compensation depth (CCD) across major geological boundaries during the last 53 m.y. A very shallow CCD during most of the Paleogene makes it difficult to obtain well-preserved carbonate sediments during these stratigraphic intervals, but Expedition 320 recovered a unique sedimentary biogenic sediment archive for time periods just after the Paleocene/Eocene boundary event, the Eocene cooling, the Eocene–Oligocene transition, the "one cold pole" Oligocene, the Oligocene–Miocene transition, and the middle Miocene cooling. Expedition 321, the second part of the PEAT program, recovered sediments from the time period roughly from 25 Ma forward, including sediments crossing the Oligocene/Miocene boundary and two major Neogene equatorial Pacific sediment sections. Together with older Deep Sea Drilling Project and Ocean Drilling Program drilling in the equatorial Pacific, we can delineate the position of the paleoequator and variations in sediment thickness from ~150°W to 110°W longitude.
    Materialart: Report , NonPeerReviewed
    Format: other
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Publikationsdatum: 2017-03-01
    Beschreibung: Atmospheric carbon dioxide concentrations and climate are regulated on geological timescales by the balance between carbon input from volcanic and metamorphic outgassing and its removal by weathering feedbacks; these feedbacks involve the erosion of silicate rocks and organic-carbon-bearing rocks. The integrated effect of these processes is reflected in the calcium carbonate compensation depth, which is the oceanic depth at which calcium carbonate is dissolved. Here we present a carbonate accumulation record that covers the past 53 million years from a depth transect in the equatorial Pacific Ocean. The carbonate compensation depth tracks long-term ocean cooling, deepening from 3.0-3.5 kilometres during the early Cenozoic (approximately 55 million years ago) to 4.6 kilometres at present, consistent with an overall Cenozoic increase in weathering. We find large superimposed fluctuations in carbonate compensation depth during the middle and late Eocene. Using Earth system models, we identify changes in weathering and the mode of organic-carbon delivery as two key processes to explain these large-scale Eocene fluctuations of the carbonate compensation depth.
    Materialart: Article , PeerReviewed
    Format: text
    Format: text
    Format: text
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
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    Unbekannt
    PANGAEA
    In:  Supplement to: Lyle, Mitchell W; Olivarez Lyle, Annette; Gorgas, T J; Holbourn, Ann E; Westerhold, Thomas; Hathorne, Ed C; Kimoto, Katsunori; Yamamoto, Shinya (2012): Data report: raw and normalized elemental data along the Site U1338 splice from X-ray flourescence scanning. In: Pälike, H; Lyle, M; Nishi, H; Raffi, I; Gamage, K; Klaus, A; and the Expedition 320/321 Scientists, Proc. IODP, 320/321: Tokyo (Integrated Ocean Drilling Program Management International, Inc.)., 320/321, https://doi.org/10.2204/iodp.proc.320321.203.2012
    Publikationsdatum: 2023-04-25
    Beschreibung: We used X-ray fluorescence (XRF) scanning on Site U1338 sediments from Integrated Ocean Drilling Program Expedition 321 to measure sediment geochemical compositions at 2.5 cm resolution for the 450 m of the Site U1338 spliced sediment column. This spatial resolution is equivalent to ~2 k.y. age sampling in the 0-5 Ma section and ~1 k.y. resolution from 5 to 17 Ma. Here we report the data and describe data acquisition conditions to measure Al, Si, K, Ca, Ti, Fe, Mn, and Ba in the solid phase. We also describe a method to convert the data from volume-based raw XRF scan data to a normalized mass measurement ready for calibration by other geochemical methods. Both the raw and normalized data are reported along the Site U1338 splice.
    Schlagwort(e): 321-U1338; COMPCORE; Composite Core; Exp321; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Pacific Equatorial Age Transect II / Juan de Fuca
    Materialart: Dataset
    Format: application/zip, 2 datasets
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Publikationsdatum: 2023-07-10
    Schlagwort(e): 321-U1338; Aluminium (peak area); Barium (peak area); Calcium (peak area); Chlorine (peak area); COMPCORE; Composite Core; Date; Depth, composite; DEPTH, sediment/rock; Exp321; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Iron (peak area); Joides Resolution; Manganese (peak area); Pacific Equatorial Age Transect II / Juan de Fuca; Potassium (peak area); Sample code/label; Silicon (peak area); Sulfur (peak area); Titanium (peak area); X-ray fluorescence core scanner (XRF)
    Materialart: Dataset
    Format: text/tab-separated-values, 282763 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 5
    Publikationsdatum: 2023-07-10
    Schlagwort(e): 321-U1338; Aluminium (peak area); Aluminium median-scale; Aluminium oxide, normalized median-scaled; Barium (peak area); Barium median-scale; Barium sulfate, normalized median-scaled; Calcium (peak area); Calcium carbonate, normalized median-scaled; Calcium median-scale; Chlorine (peak area); COMPCORE; Composite Core; Date; Depth, composite; DEPTH, sediment/rock; Exp321; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Iron (peak area); Iron median-scale; Iron oxide, normalized median-scaled; Joides Resolution; Manganese (peak area); Manganese median-scale; Manganese oxide, normalized median-scaled; Pacific Equatorial Age Transect II / Juan de Fuca; Potassium (peak area); Potassium median-scale; Potassium oxide, normalized median-scaled; Sample code/label; Silica, normalized median-scaled; Silicon (peak area); Silicon median-scale; Sulfur (peak area); Sum; Titanium (peak area); Titanium dioxide, normalized median-scaled; Titanium median-scale; X-ray fluorescence core scanner (XRF)
    Materialart: Dataset
    Format: text/tab-separated-values, 511440 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 6
    Publikationsdatum: 2023-07-10
    Schlagwort(e): 321-U1338; Accumulation rate, opal; AGE; Calculated; COMPCORE; Composite Core; Depth, composite; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Exp321; Integrated Ocean Drilling Program / International Ocean Discovery Program; Intercore correlation; IODP; Joides Resolution; Measured; Opal, biogenic silica; Pacific Equatorial Age Transect II / Juan de Fuca; Sample code/label
    Materialart: Dataset
    Format: text/tab-separated-values, 10994 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 7
    Publikationsdatum: 2023-07-10
    Schlagwort(e): 321-U1338; AGE; Comment; COMPCORE; Composite Core; Depth, bottom/max; Depth, composite; DEPTH, sediment/rock; Depth, top/min; DSDP/ODP/IODP sample designation; Exp321; Foraminifera, benthic δ13C; Foraminifera, benthic δ18O; Integrated Ocean Drilling Program / International Ocean Discovery Program; Intercore correlation; IODP; Joides Resolution; Pacific Equatorial Age Transect II / Juan de Fuca; Sample code/label
    Materialart: Dataset
    Format: text/tab-separated-values, 9017 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 8
    Publikationsdatum: 2023-07-10
    Schlagwort(e): -; 321-U1338; AGE; Calcium (peak area); Calcium carbonate; Calculated; COMPCORE; Composite Core; Depth, composite; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Estimated; Exp321; Integrated Ocean Drilling Program / International Ocean Discovery Program; Intercore correlation; IODP; Joides Resolution; log-Silicon/Titanium ratio; log-Titanium/Calcium ratio; Pacific Equatorial Age Transect II / Juan de Fuca; Sample code/label; Silicon (peak area); Titanium (peak area); X-ray fluorescence (XRF)
    Materialart: Dataset
    Format: text/tab-separated-values, 32193 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 9
    Publikationsdatum: 2023-12-14
    Schlagwort(e): 320-U1331A; Caliper; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Exp320; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Pacific Equatorial Age Transect I; P-Wave Velocity, Bayonet System (PWB); Sample code/label; Sonic travel time; Time Stamp; Velocity, compressional wave along Y-axis; Velocity, compressional wave along Z-axis
    Materialart: Dataset
    Format: text/tab-separated-values, 1050 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 10
    Publikationsdatum: 2023-12-14
    Schlagwort(e): 320-U1331A; Caliper; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Exp320; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Joides Resolution; Pacific Equatorial Age Transect I; P-Wave Velocity, Caliper System (PWC); Sample code/label; Sonic travel time; Time Stamp; Velocity, compressional wave along X-axis
    Materialart: Dataset
    Format: text/tab-separated-values, 522 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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