Chronology of loess-paleosol sequences at Weinan section, Central China

• Autorzy: Jiaqi Liu , Sun Jimin , Chen Rui , Wang Wenyuan
• Konferencja: The Dating of Quaternary Marine and Land sediments (21-25.06.1999 ; Poznań, Poland)
• Języki publikacji: EN

Abstrakty

EN

The loess profile at Weinan (34°12’N and 109°31’E), Central China, with good stratigraphic stability and well developed paleosols, was systematically sampled and dated by AMS radiocarbon and TL methods. The preliminary high-resolution time scale of this section has been tuned. Based on this time scale and other climatic proxies such as susceptibility curve and grain-size curve, the author summarizes several for the last 150,000 years age results regarding some important stratigraphic boundaries and established a time scale. According to this time scale, the basal age of S0, located at 143 cm below the top of section, corresponding to the boundary between S0/L1 is 11,980 yr cal BP, this is the age of the beginning of Holocene. The age of the boundary between L1 and S1 is dated 74,220 years B. P. at 854 cm, which shows the ending age of the last interglacial stage is about 74,000 cal BP. Si is highly pedogenised paleosol with dark brown color and 361 cm in thickness. It can be divided into three sub-layers, corresponding to the last interglacial stage, the real S1/L2 boundary is located in 1,180 cm depth and has an age of 128,870 years B. P. It may be correlated with the deep-sea oxygen-isotopic stage 5. The Last Glacial Maximum (LGM) reflected in Weinan loess section by grain size curve and susceptibility curve is from about 20,000 cal BP to 18,000 cal BP. A rapid deposit period from 300 cm to 196 cm lasted a time span from 20,200 cal BP to 19,800 cal BP. The deposit rate of this segment is over 20 times than the average deposit rate of Chinese loess.

Słowa kluczowe

EN

loess sections; 14C dating; TL dating; time scale

PL

profile lessowe; datowanie radiowęglowe; datowanie termoluminescencyjne; skala czasu

• Wydawca: Uniwersytet im. Adama Mickiewicza. Instytut Geologii
• Czasopismo: Geologos
• Rocznik: 2000
• Tom: Vol. 5
• Strony: 165--174
• Opis fizyczny: Bibliogr. 16 poz.

Twórcy

autor

Jiaqi Liu

• Institute of Geology, Chinese Academy of Sciences Beijing 100029

autor

Sun Jimin

• Institute of Geology, Chinese Academy of Sciences Beijing 100029

autor

Chen Rui

• Institute of Geology, Chinese Academy of Sciences Beijing 100029

autor

Wang Wenyuan

• Institute of Geology, Chinese Academy of Sciences Beijing 100029

Bibliografia

• Bard E., Arnold M., Hamelin B., Tisnerat I., Aborde N. & Cabioch G., 1998: Radiocarbon calibration by means of mass spectrometric 230Th/230U and 14C ages of corals: an updated database including samples from Barbados, Mururoa and Tahiti. Radiocarbon, 40(3): 1085-1092.
• Ding Z. L., Yu Z. W. & Liu T. S., 1991: The advanced researches of Chinese loess (3): Time scale. Quaternary Sciences (in Chinese), 4: 336-348.
• Edoward B., Maurice A., Richard F. G. & Bruno H., 1993: 230Th _234U and 14C ages obtained by Mass Spectrometry on Corals. Radiocarbon, 35(1): 191-199.
• Forman S. L., 1991: Late Pleistocene chronology of loess deposition near Luochuan, China. Quaternary Research, 36: 19-28.
• Guo Z. T., Liu T. S. & An Z. S., 1994: Paleosols of the last 0.15 Ma in the Weinan loess section and their paleoclimatic significance. Quaternary Sciences (in Chinese), 3: 256-269.
• Heller F. & Liu T. S., 1982: Magnetostratigraphic of loess deposits in China. Nature, 300: 520-543.
• Heller F. & Liu T. S., 1984: Magnetism of Chinese loess deposits. Geophysical Journal of the Royal Astronomical Society, 77: 125-141.
• Imbrie J., Hays J., Martrinson D., McIntyre A., Mix A., Morley J., Pisas N., Prell W. & Schacklet K., 1984: The orbital theory of Pleistocene climate: Support from a revised chronology of the Marine Delta 180 record. [In:] A. Berger, J. Imbrie, J. Hays, G. Kukla & B. Satlzman, ed.: Milankovitch and Climate, Part I. D. Reidel Publishing Co., Dordrecht, Netherlands: 269-305.
• Kukla G., 1987: Loess stratigraphy in central China. Quaternary Science Reviews, 6: 191-219.
• Kukla G., Heller F., Liu X. M., Xu T. C., Liu T. S. & An Z. S., 1988: Pleistocene climate in China dated by magnetic susceptibility. Geology, 16: 811-814.
• Liu T. S., 1985: Loess and Environment (in Chinese). Science Press, Beijing: 1-482.
• Liu X. M., Liu T. S., Xu T. C., Liu C. & Chen M. Y., 1987: A preliminary study on magnetostratigraphy of a loess profile in Xifeng area, Gansu Province. [In:] T. S. Liu, ed.: Aspects of Loess Research. China Ocean Press, Beijing: 164-167.
• Rutter N. W., Ding Z. L., Evans M. E. & Liu T. S., 1991: Baoji-type pedostratigraphic section, Loess Plateau, north-central China. Quaternary Science Reviews, 10: 1-22.
• Sun J. M., Ying G. M., Ding Z. L., Liu T. S. & Chen J., 1998: Thermoluminescence chronology of sand profiles in the Mu Us Desert, China, Palaeogeogr., Palaeoclimatol., Palaeoecol., 144: 225-233, 1998.
• Zhu R. X., Laj C. & Mazaud A., 1994: The Matuyama-Brunhes and upper Jaramillo transitions recorded in a loess section at Weinan, north-central China. Earth and Planetary Science Letters, 125: 143-158.
• Lu Y. C., Mortlock A. J., Price D. M. & Readhead M. L., 1987: Thermoluminescence dating of coarse-grain quartz from the Malan loess at Zhaitang section, China. Quaternary Research, 28: 356-363.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).