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  • 2000-2004  (11)
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  • 1
    Electronic Resource
    Electronic Resource
    State of Magnesia in Magnesia (10.4 mol%)-Doped Zirconia Powder Prepared from Coprecipitation (2002)
    Westerville, Ohio : American Ceramics Society
    Journal of the American Ceramic Society 85 (2002), S. 0 
    Details
    ISSN: 1551-2916
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: MgO (10.4 mol%)-doped ZrO2 powder, which was prepared by coprecipitation and calcination at 750°C, was leached and milled, respectively. The powders were characterized by Auger electron scanning microprobe and XRD technologies. Only the 2.3 mol% MgO was soluble in ZrO2; it stabilized ZrO2 as the metastable tetragonal phase (crystallite size ∼45 nm) at room temperature. The rest of the MgO (8.1 mol%) existed on the surface of the ZrO2 grains in the prepared powder.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1151-2916.2002.tb00271.x
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    Paper (German National Licenses)
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  • 2
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    Age model and Plio-Pleistocene benthic stable oxygen isotope ratios of ODP Site 184-1143 in the Sourh China Sea (2002)
    PANGAEA
    In:  Supplement to: Tian, Jun; Wang, Pinxian; Cheng, Xinrong; Li, Qianyu (2002): Astronomically tuned Plio- Pleistocene benthic d18O record from South-China Sea and Atlantic-Pacific comparison. Earth and Planetary Science Letters, 203(3-4), 1015-1029, https://doi.org/10.1016/S0012-821X(02)00923-8
    Details
    Publication Date: 2024-01-09
    Description: Based on benthic foraminiferal delta18O from ODP Site 1143, a 5-Myr astronomical timescale for the West Pacific Plio-Pleistocene was established using an automatic orbital tuning method. The tuned Brunhes/Matuyama paleomagnetic polarity reversal age agrees well with the previously published age of 0.78 Ma. The tuned ages for several planktonic foraminifer bio-events also agree well with published dates, and new ages for some other bio-events in the South China Sea were also estimated. The benthic delta18O from Site 1143 is highly coherent with the Earth's orbit (ETP) both at the obliquity and precession bands for the last 5 Myr, and at the eccentricity band for the last 2 Myr. In general, the 41-kyr cycle was dominant through the Plio-Pleistocene although the 23-kyr cycle was also very strong. The 100-kyr cycle became dominant only during the last 1 Myr. A comparison of the benthic delta18O between the Atlantic (ODP 659) and the East and West Pacific (846 and 1143) reveals that the Atlantic-Pacific benthic oxygen isotope difference ratio (Delta delta18OAtl-Pac) displays an increasing trend in three time intervals: 3.6-2.7 Ma, 2.7-2.1 Ma and 1.5-0.25 Ma. Each of the intervals begins with a rapid negative shift in Delta delta18OAtl-Pac, followed by a long period with an increasing trend, corresponding to the growth of the Northern Hemisphere ice sheet. This means that all three intervals of ice sheet growth in the Northern Hemisphere were accompanied at the beginning by a rapid relative warming of deep water in the Atlantic as compared to that of the Pacific, followed by its gradual relative cooling. This general trend, superimposed on the frequent fluctuations with glacial cycles, should yield insights into the processes leading to the boreal glaciation. Cross-spectral analyses of the Delta delta18OAtl-Pac with the Earth's orbit suggests that after the initiation of Northern Hemisphere glaciation at about 2.5 Ma, obliquity rather than precession had become the dominant force controlling the vertical structure or thermohaline circulation in the paleo-ocean.
    Keywords: 184-1143; COMPCORE; Composite Core; Joides Resolution; Leg184; Ocean Drilling Program; ODP; Oxygen isotopes; South China Sea
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 3
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    (Table T1) Geochemical composition of ODP Site 184-1143 late Pliocene sediments (2003)
    PANGAEA
    In:  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
    Details
    Publication Date: 2024-01-09
    Description: 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.
    Keywords: 184-1143; Aluminium oxide; Arsenic; Barium; Calcium oxide; Carbon, inorganic, total; Carbon, organic, total; Chromium; Cobalt; COMPCORE; Composite Core; Coulometric titration; DEPTH, sediment/rock; DSDP/ODP/IODP sample designation; Iron oxide, Fe2O3; Joides Resolution; Leg184; Manganese oxide; Nickel; Ocean Drilling Program; ODP; Phosphorus pentoxide; Potassium oxide; Rubidium; Sample code/label; Silicon dioxide; South China Sea; Strontium; Titanium dioxide; Vanadium; X-ray fluorescence spectrometer (Philips PW2400); Zirconium
    Type: Dataset
    Format: text/tab-separated-values, 6714 data points
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  • 4
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    (Table T2) Oxygen and carbon isotope ratios for benthic foraminifers of ODP Site 184-1143 (2004)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 184-1143A; 184-1143B; 184-1143C; AGE; Cibicidoides wuellerstorfi, δ13C; Cibicidoides wuellerstorfi, δ18O; Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Factor; Joides Resolution; Leg184; Mass spectrometer Finnigan MAT 252; Ocean Drilling Program; ODP; Sample code/label; South China Sea; Uvigerina peregrina, δ13C; Uvigerina peregrina, δ18O
    Type: Dataset
    Format: text/tab-separated-values, 13736 data points
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  • 5
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    (Table T1) Oxygen and carbon isotope ratios for planktonic foraminifers of ODP Site 184-1143 (2004)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 184-1143A; 184-1143B; 184-1143C; AGE; Depth, composite; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Globigerinoides obliquus, δ13C; Globigerinoides obliquus, δ18O; Globigerinoides ruber, δ13C; Globigerinoides ruber, δ18O; Joides Resolution; Leg184; Mass spectrometer Finnigan MAT 252; Ocean Drilling Program; ODP; Sample code/label; South China Sea
    Type: Dataset
    Format: text/tab-separated-values, 7584 data points
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  • 6
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    (Table 1) Number of counted pollen samples, intervals and time resolution between samples of ODP SIte 184-1144 (2003)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 184-1144; Age, maximum/old; Age, minimum/young; COMPCORE; Composite Core; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Joides Resolution; Leg184; Ocean Drilling Program; ODP; Sample amount; Sample spacing; South China Sea; Time resolution
    Type: Dataset
    Format: text/tab-separated-values, 35 data points
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  • 7
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    Stable oxygen isotope ratios of Cibicidoides wuellerstorfi from the Plio-Pleistocene section of Site ODP 184-1143 in the South China Sea (2002)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 184-1143; AGE; Calculated, see reference(s); Cibicidoides wuellerstorfi, δ18O; COMPCORE; Composite Core; Depth, composite; Intercore correlation; Joides Resolution; Leg184; Mass spectrometer Finnigan MAT 252; Ocean Drilling Program; ODP; Oxygen isotopes; Sedimentation rate; South China Sea
    Type: Dataset
    Format: text/tab-separated-values, 5119 data points
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  • 8
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    (Table 2) Ages of planktonic foraminifera in the Plio-Pleistocene sectrion of ODP Site 184-1143 in the South China Sea (2002)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 184-1143; Age model; Ageprofile Datum Description; Comment; COMPCORE; Composite Core; DEPTH, sediment/rock; Joides Resolution; Leg184; Ocean Drilling Program; ODP; South China Sea
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
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  • 9
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    Pollen ages and depths in ODP Site 184-1144 (2003)
    PANGAEA
    In:  Supplement to: Sun, Xiangjun; Luo, Yunli; Huang, Fei; Tian, Jun; Wang, Pinxian (2003): Deep-sea pollen from the South China Sea: Pleistocene indicators of East Asian monsoon. Marine Geology, 201(1-3), 97-118, https://doi.org/10.1016/S0025-3227(03)00211-1
    Details
    Publication Date: 2024-01-09
    Description: A high-resolution pollen record (sampling interval averages 820 years) has been obtained from ODP Site 1144 (water depth 2037 m), northern South China Sea. The 504-m sequence (in composition length) covers the last 1.03 million years according to micropaleontological and isotopic stratigraphy. The pollen assemblages are characterized by high proportions of Pinus and herb pollen, and by their frequent alternations. Based on these alternations, 29 pollen zones have been recognized that are closely correlated to the Marine Oxygen Isotope Stages (MIS) 1-29. Pinus- dominant pollen zones correspond to interglacial periods with lighter delta18O values, while herb-marked ones relate to the heavier delta18O stages assigned to glacials. Judging from the pollen data, the exposed northern continental shelf of the South China Sea during the glacials was covered by grassland, and the extensive northern shelf has formed only since MIS 6 (ca. 150 ka), probably as a result of tectonic subsidence. Tree pollen influx values are indicative of winter monsoon which began to intensify 600 ka ago. The summer monsoon variations can be approximated by the fern percentage within the total pollen and spore abundance, and the result shows high values in general occurring at interglacials, with the maxima at MIS 15, 5e and 1. The relatively high fern percentage with smaller amplitude in variations before 600 ka might suggest more stable humid conditions before the intensification of winter monsoon.
    Keywords: 184-1144; COMPCORE; Composite Core; Joides Resolution; Leg184; Ocean Drilling Program; ODP; South China Sea
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 10
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    Stable foraminifer isotope composition of ODP Site 184-1143, South China Sea (2004)
    PANGAEA
    In:  Supplement to: Cheng, Xinrong; Tian, Jun; Wang, Pinxian (2004): Data report: Stable isotopes from Site 1143. 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, 1-8, https://doi.org/10.2973/odp.proc.sr.184.221.2004
    Details
    Publication Date: 2024-01-09
    Description: Site 1143 is located at 9°21.72'N, 113°17.11'E, at a water depth of 2772 m within a basin on the southern continental margin of the South China Sea. Three holes were cored at the site and combined into a composite (spliced) stratigraphic section that documents complete recovery for the upper 190.85 meters composite depth, the interval of advanced piston coring (Wang, Prell, Blum, et al., 2000, doi:10.2973/odp.proc.ir.184.2000; Wang et al., 2001, doi:10.1007/BF02907085). The early Pliocene to Holocene sediment sequence provided abundant and well-preserved calcareous microfossils and offered an excellent opportunity to establish foraminiferal stable isotope records. Here, we present benthic and planktonic d18O and d13C records that cover the last 5 m.y. These data sets will provide an important basis for upcoming studies to generate an orbitally tuned oxygen isotope stratigraphy and examine long- and short-term changes in deep and surface water mass signatures (temperature, salinity, and nutrients) with an average sample spacing of ~2.9 k.y. for the benthic and ~2.6 k.y. for the planktonic records.
    Keywords: 184-1143A; 184-1143B; 184-1143C; DRILL; Drilling/drill rig; Joides Resolution; Leg184; Ocean Drilling Program; ODP; South China Sea
    Type: Dataset
    Format: application/zip, 2 datasets
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