de.pangaea.dataset784802 und dataset PANGAEA

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https://www.pangaea.de/ information pointOfContact 2026-05-01T03:17:55Z https://doi.pangaea.de/10.1594/PANGAEA.784802 2003-01-01 publication https://doi.org/10.1594/PANGAEA.784802 Wehausen, Rolf author Tian, Jun

tianjun@tongji.edu.cn

https://orcid.org/0000-0002-4842-7076 information author Brumsack, Hans-Jürgen

brumsack@icbm.de

https://orcid.org/0000-0002-5549-5018 information author Cheng, Xinrong author Wang, Pinxian author PANGAEA

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https://www.pangaea.de/ information publisher tableDigital Supplement to: Wehausen, Rolf; Tian, Jun; Brumsack, Hans-Jürgen; Cheng, Xinrong; Wang, Pinxian (2003): Geochemistry of Pliocene sediments from ODP Site 1143 (southern South China Sea). In: Prell, WL; Wang, P; Blum, P; Rea, DK; Clemens, SC (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 184, 1-25, https://doi.org/10.2973/odp.proc.sr.184.201.2003 Pliocene core intervals from Ocean Drilling Program Site 1143 located in the southern part of the South China Sea were measured for their major and minor element composition at ~2-k.y. resolution. Changes in sediment composition parallel glacial-interglacial changes as indicated by the corresponding oxygen isotope record of benthic foraminifers. Carbonate contents are lower during glacial stages and higher during interglacial stages. This is attributed to dilution by a higher contribution of terrigenous detrital matter during glacial intervals and to enhanced biological productivity during interglacials as indicated by enrichments in barium. The terrigenous detrital matter fraction shows small but distinct changes in composition. These variations may be explained by multiple processes, including changes in provenance and weathering caused by monsoonal climate variability and sea level fluctuations. Gradual or long-term changes in sediment composition also occur during the investigated interval. There is a shift toward lower TiO2 (carbonate-free basis; cfb) values at around 2.9 Ma and an increase in Al2O3 (cfb) variations at around 2.55 Ma. These changes can be explained in both cases by an increasing contribution from the Mekong River, delivering material with low TiO2 (cfb)/Al2O3 (cfb) ratios, followed by a gradual increase in weathering, causing higher Al2O3 (cfb) (probably reflecting kaolinite) contents. Both may be the result of an enhanced summer monsoon. The manganese and phosphate geochemistry of Site 1143 sediments seem to be strongly dominated by biological productivity and a high burial flux of carbonate, which acts as an adsorbing agent and/or substrate. During strong interglacials and corresponding times of enhanced productivity, Mn may be remobilized from continental margin sediments deposited within an oxygen minimum zone and subsequently exported into the pelagic region, where it oxidizes and settles to form Mn-enriched layers in the sediment. completed Wehausen, Rolf principalInvestigator ODP Ocean Drilling Program theme 1995-01-01 creation PANGAEA

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https://www.pangaea.de/ information pointOfContact copyright copyright CC-BY-3.0: Creative Commons Attribution 3.0 Unported textTable und geoscientificInformation 113.285133333333 113.285133333333 9.36193333333333 9.36193333333333 1999-03-03T00:00:00 1999-03-10T00:00:00 99.5 136.46 Sediment depth is given in mcd. Elemental contents were calculated on a carbonate-free basis. Sample code/label thematicClassification DSDP/ODP/IODP sample designation DEPTH, sediment/rock physicalMeasurement m m Silicon dioxide physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) % % Titanium dioxide physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) % % Aluminium oxide physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) % % Iron oxide, Fe2O3 physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) % % Manganese oxide physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) % % Calcium oxide physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) % % Potassium oxide physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) % % Phosphorus pentoxide physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) % % Arsenic physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) mg/kg mg/kg Barium physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) mg/kg mg/kg Cobalt physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) mg/kg mg/kg Chromium physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) mg/kg mg/kg Nickel physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) mg/kg mg/kg Rubidium physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) mg/kg mg/kg Strontium physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) mg/kg mg/kg Vanadium physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) mg/kg mg/kg Zirconium physicalMeasurement X-ray fluorescence spectrometer (Philips PW2400) mg/kg mg/kg Carbon, inorganic, total physicalMeasurement Coulometric titration; carbonate carbon % % Carbon, organic, total physicalMeasurement Coulometric titration % % text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.784802?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data. EVENT LABEL: 184-1143 * LATITUDE: 9.361933 * LONGITUDE: 113.285133 * DATE/TIME START: 1999-03-03T00:00:00 * DATE/TIME END: 1999-03-10T00:00:00 * ELEVATION: -2772.3 m * PENETRATION: 1158.2 m * RECOVERY: 1101.8 m * LOCATION: South China Sea * CAMPAIGN: Leg184 * BASIS: Joides Resolution * METHOD/DEVICE: Composite Core 126 cores; 1158.2 m cored; 0 m drilled; 95.1% recovery 1999-03-03T00:00:00