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  • Average chain length, n-Alkanes, C14-C37; Average chain length, n-Alkanes, C25-C37; Bulk organic geochemistry; Carbon Preference Index; China; Clumped isotope thermometry; Event label; GASC; Gas chromatograph; Instrument; Latitude of event; Lithology/composition/facies; Longitude of event; n-Alkane C27, δ13C; n-Alkane C27, δ13C, standard deviation; n-Alkane C27, δD; n-Alkane C27, δD, standard deviation; n-Alkane C28, δ13C; n-Alkane C28, δ13C, standard deviation; n-Alkane C28, δD; n-Alkane C28, δD, standard deviation; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C29, δD; n-Alkane C29, δD, standard deviation; n-Alkane C30, δ13C; n-Alkane C30, δ13C, standard deviation; n-Alkane C30, δD; n-Alkane C30, δD, standard deviation; n-Alkane C31, δ13C; n-Alkane C31, δ13C, standard deviation; n-Alkane C31, δD; n-Alkane C31, δD, standard deviation; n-Alkane C32, δ13C; n-Alkane C32, δ13C, standard deviation; n-Alkane C32, δD; n-Alkane C32, δD, standard deviation; n-Alkane C33, δ13C; n-Alkane C33, δ13C, standard deviation; n-Alkane C33, δD; n-Alkane C33, δD, standard deviation; OUTCROP; Outcrop sample; palynology; pedogenic carbonate; Plant wax; Reference/source; Sample ID; Section; stable isotope geochemistry; Stratigraphic height; Uniform resource locator/link to reference; Xining_Basin_Bingling_Shan; Xining_Basin_Caijia; XRD  (1)
  • Bulk organic geochemistry; Clumped isotope thermometry; palynology; pedogenic carbonate; Plant wax; stable isotope geochemistry; XRD  (1)
  • Siberian High  (1)
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  • 1
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    Unknown
    Proto-monsoon rainfall and greening in Central Asia due to extreme early Eocene warmth (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: Here we present paleo-environmental datasets derived from early Eocene sedimentary strata in the Xining Basin, China. The sedimentary rocks were formed in a terrestrial alluvial mudflat environment and the datasets include: 1) Pollen counts, 2) Bulk rock organic carbon content and δ13C values, 3) Plant wax compound specific (C27-C33) δ13C values, 4) Bulk mineralogy X-Ray Diffraction (XRD) data and 5) Carbonate (pedogenic and vadose-grown) δ13C and δ18O values as well as clumped isotopes (∆47 values). The latter also includes temperature reconstructions derived from the ∆47 values and soil water δ18O reconstructions derived from these temperatures and the carbonate δ18O values. Individual clumped isotope measurements of sample and standard replicates are shown in: 6) Clumped isotope replicate analyses. Samples were collected during four field campaigns in 2015, 2016, 2017 and 2018 and analyzed as part of the MAGIC project (ERC 649081) and the VeWA consortium by the LOEWE programme of the Hessen Ministry of Higher Education, Research and Arts, Germany. Samples were collected from the following outcrop sections: Bingling Shan (36.45°N, 101.98°E, 2360 m elevation), Caijia (36.62°N, 101.98°E, 2480 m elevation), Dazhai (36.44°N, 102.02°E, 2440 m elevation), East Xining (36.58°N, 101.90°E, 2285 m elevation ), Ledu (36.43°N, 102.38°E, ) and Xiejia (36.52°N, 101.87°E, 2450 m elevation).
    Keywords: Bulk organic geochemistry; Clumped isotope thermometry; palynology; pedogenic carbonate; Plant wax; stable isotope geochemistry; XRD
    Type: Dataset
    Format: application/zip, 6 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Unknown
    Plant wax compound specific (C27-C33) δ13C and δ2H of early Eocene strata in the Xining Basin, China (2024)
    PANGAEA
    Details
    Publication Date: 2024-04-23
    Keywords: Average chain length, n-Alkanes, C14-C37; Average chain length, n-Alkanes, C25-C37; Bulk organic geochemistry; Carbon Preference Index; China; Clumped isotope thermometry; Event label; GASC; Gas chromatograph; Instrument; Latitude of event; Lithology/composition/facies; Longitude of event; n-Alkane C27, δ13C; n-Alkane C27, δ13C, standard deviation; n-Alkane C27, δD; n-Alkane C27, δD, standard deviation; n-Alkane C28, δ13C; n-Alkane C28, δ13C, standard deviation; n-Alkane C28, δD; n-Alkane C28, δD, standard deviation; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C29, δD; n-Alkane C29, δD, standard deviation; n-Alkane C30, δ13C; n-Alkane C30, δ13C, standard deviation; n-Alkane C30, δD; n-Alkane C30, δD, standard deviation; n-Alkane C31, δ13C; n-Alkane C31, δ13C, standard deviation; n-Alkane C31, δD; n-Alkane C31, δD, standard deviation; n-Alkane C32, δ13C; n-Alkane C32, δ13C, standard deviation; n-Alkane C32, δD; n-Alkane C32, δD, standard deviation; n-Alkane C33, δ13C; n-Alkane C33, δ13C, standard deviation; n-Alkane C33, δD; n-Alkane C33, δD, standard deviation; OUTCROP; Outcrop sample; palynology; pedogenic carbonate; Plant wax; Reference/source; Sample ID; Section; stable isotope geochemistry; Stratigraphic height; Uniform resource locator/link to reference; Xining_Basin_Bingling_Shan; Xining_Basin_Caijia; XRD
    Type: Dataset
    Format: text/tab-separated-values, 753 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
    facet.materialart.
    Unknown
    Loess‐Like Dust Appearance at 40 Ma in Central China (2021)
    Details
    Publication Date: 2021-07-21
    Description: Asian mineral dust has been studied extensively for its role in affecting regional‐to global‐scale climate and for its deposits, which enable reconstructing Asian atmospheric circulation in the past. However, the timing and origin of the dust deposits remain debated. Numerous loess records have been reported across the Asian continent with ages varying from the Miocene to the Eocene and linked to various mechanisms including global cooling, Tibetan Plateau uplift and retreat of the inland proto‐Paratethys Sea. Here, we study the Eocene terrestrial mudrocks of the Xining Basin in central China and use nonparametric end‐member analysis of grain‐size distributions to identify a loess‐like dust component appearing in the record at 40 Ma. This is coeval with the onset of high‐latitude orbital cycles and a shift to predominant steppe‐desert vegetation as recognized by previous studies in the same record. Furthermore, we derive wind directions from eolian dune deposits which suggest northwesterly winds, similar to the modern‐day winter monsoon which is driven by a high pressure system developing over Siberia. We propose that the observed shifts at 40 Ma reflect the onset of the Siberian High interacting with westerly derived moisture at obliquity timescales and promoting dust storms and aridification in central China. The timing suggests that the onset may have been triggered by increased continentality due to the retreating proto‐Paratethys Sea.
    Description: Key Points: The onset of Asian dust is identified at 40 Ma within a longer continuous record. Shifts in the dust, cyclostratigraphy and pollen suggest the Siberian High at 40 Ma. The coeval proto‐Paratethys Sea retreat triggered the onset of the Siberian High.
    Description: EC, H2020, H2020 Priority Excellent Science, H2020 European Research Council (ERC) http://dx.doi.org/10.13039/100010663
    Keywords: 551.78 ; aridification ; dust ; loess ; middle Eocene ; Siberian High ; winter monsoon
    Type: article
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    CITATION GEO-LEO
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