An isotopic study of a late Quaternary loess-paleosol sequence in SW Germany

作者：Pustovoytov K^*; Terhorst B

来源：Revista Mexicana de Ciencias Geologicas, 2004, 21(1): 88-93.

• loess-paleosol sequence
• pedogenic carbonate
• stable isotope
• radiocarbon age
• late Quaternary
• SW Germany

A late Quaternary loess-paleosol sequence at Schattenhausen (SW Germany) was studied by isotopic methods (delta(13)C, delta(18)O, C-14 age). The stable isotopic composition of organic carbon indicates that C3 vegetation dominated the site during most of the time of formation of the loess-paleosol sequence (delta(13)C = -26 to -20 parts per thousand). However, there was a short period in the Late Pleniglacial with a pronounced C4 excursion of the delta(13)C values (-16 to -19 parts per thousand) of organic matter Calcified root cells (delta C-13 = -8 to -11 parts per thousand and delta(18)O = ca. -6.5 parts per thousand) are isotopically different from diffuse carbonate in the loess and soil matrix (delta(13)C = -1 to -2.5 parts per thousand; delta(18)O = -6 to -7.5 parts per thousand). The stable isotopic composition of carbon and oxygen of the calcified root cells in combination with their 14 C ages suggest that they formed, at least partially, in the Holocene.

• 出版日期2004