Chaona, Chinese Loess Plateau Late Neogene Magnetic Susceptibility Data Song, Y.G.; Fang, X.M.; Torii, M.; Ishikawa, N.; Li, J.J. Song, Y.G. Fang, X.M. Torii, M. Ishikawa, N. Li, J.J. Monsoon millennial resolution earth science/paleoclimate/loess (depth,null,null,meter,null,loess,null,null,N,null) earth science/paleoclimate/loess (age,null,null,calendar kiloyear before present,null,loess,null,null,N,null) earth science/paleoclimate/loess (mass magnetic susceptibility,loess,null,cubic meter per kilogram,null,loess,null,null,N,units are 10E-8m3kg-1) earth science/paleoclimate/loess (Chaona section>LATITUDE 35.1>LONGITUDE 107.2) The Late Cenozoic red clay-loess sequence in the Chinese Loess Plateau provides a high-resolution record of paleoclimatic and tectonic changes related to the phased uplift of the Tibetan Plateau. Detailed magnetostratigraphy of a recently recovered 125-m-thick sediment sequence from the central Chinese Loess Plateau shows that the red clay began to accumulate at ca. 8.1 Ma, implying a marked drying in the interior of Asian as well as the initial establishment of the East Asian paleomonsoon regime. Prior to 3.8 Ma, the ferromagnetic mineral concentrations, as revealed by both magnetic susceptibility and S-ratios, exhibit a cyclic pattern superimposed upon a linear trend. This pattern collapsed immediately after 3.8 Ma, suggesting a change in source area. This in turn may have resulted from the reorganization of atmospheric circulation and the onset of the modern Asian monsoon, probably associated with the accelerated uplift of the Tibetan Plateau to a certain threshold elevation. STUDY NOTES: The eolian loess-red clay section is situated at Chaona town in Lingtai County, Central Chinese Loess Plateau. The entire Late Cenozoic sediment sequence is about 300m thick, consisting of a 175-m-thick Quaternary loess-paleosol sequence and 125-m-thick Tertiary red clay. The bottom paleomagnetism age is about 8.1 Ma. Age is from linear interpolation of paleomagnetic polarity boundary. Magnetic susceptibility data are average of low-frequency and high frequency mass-specific magnetic susceptibility. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Song, Y.G. Investigator : Fang, X.M. Investigator : Torii, M. Investigator : Ishikawa, N. Investigator : Li, J.J. 2010-10-27 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/9703 https://www1.ncdc.noaa.gov/pub/data/paleo/loess/china/song2007clp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/loess/china/song2007clp.xls https://www1.ncdc.noaa.gov/pub/data/paleo/loess/china/song2007clp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/loess/china/song2007clp.xls English https://www.ncdc.noaa.gov/paleo/study/9703 https://www1.ncdc.noaa.gov/pub/data/paleo/loess/china/song2007clp.txt https://www1.ncdc.noaa.gov/pub/data/paleo/loess/china/song2007clp.xls Song, Y.G., X.M. Fang, M. Torii, N. Ishikawa, J.J. Li, and Z.S. An. 2007. Late Neogene rock magnetic record of climatic variation from Chinese eolian sediments related to uplift of the Tibetan Plateau. Journal of Asian Earth Sciences, Vol. 30, Issue 2, pp. 324-332, 20 April 2007. doi:10.1016/j.jseaes.2006.10.004 START YEAR: 8100000 cal yr BP * END YEAR: 0 cal yr BP 107.2 35.1 107.2 35.1