Luminescence and amino acid racemization chronology of the loess–paleosol sequence at Süttő, Hungary
Luminescence and amino acid racemization chronology of the loess–paleosol sequence at Süttő, Hungary
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DOI：
10.1016/j.quaint.2008.01.009
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发表时间：
2009-04
影响因子：
2.2
通讯作者：
Ágnes Novothny;M. Frechen;Erzsébet Horváth;B. Bradák;E. Oches;W. McCoy;T. Stevens
中科院分区：
文献类型：
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作者：
Ágnes Novothny;M. Frechen;Erzsébet Horváth;B. Bradák;E. Oches;W. McCoy;T. Stevens
匈牙利的黄土-古土壤序列为喀尔巴阡盆地提供了一个优秀的上更新世气候档案。位于匈牙利最北部的多瑙河右岸旁，厚达20米的黄土覆盖着s<s:2>特尔格钙华复合体。黄土夹层有两个发育较弱的灰色层，两个较薄的棕色草原样土壤和一个土壤复合体，包括一个被黑钙土样古土壤覆盖的富含粘土的红褐色层。采用红外光激发光（IRSL）法测定了黄土多矿物细粒物质的沉积年代。最上层黄土的IRSL年龄估计在15 ~ 40ka之间。土壤复合体顶部黄土的IRSL年龄估计在48 ~ 60ka之间。该杂岩极有可能与海洋氧同位素阶段（MIS） 5间冰期有关。氨基酸消旋化（AAR）结果表明，土壤复合体下方的黄土沉积于第二次冰期。剖面上部的放射性碳定年和黄土下石灰华与MIS 7-8的铀系列（230Th/234U）定年提供了进一步的独立年龄控制。该层序磁化率记录与黄土层和土层具有较强的相关性。
The loess–paleosol sequences in Hungary provide an excellent Upper Pleistocene climate archive of the Carpathian Basin. Loess deposits up to 20m thick cover the Süttő travertine complex, located in the very northern part of Hungary, next to the right bank of the Danube River. The loess is intercalated with two weakly developed greyish horizons, two thinner-brownish steppe-like soils and a pedocomplex, including a reddish-brown clay-enriched horizon covered by a chernozem-like paleosol. Infrared optically stimulated luminescence (IRSL) dating was applied on polymineral fine grain material to determine the depositional age of the loess. The uppermost loess yields IRSL age estimates ranging from 15 to 40ka. The loess on top of the pedocomplex yields IRSL age estimates ranging from 48 to 60ka. The pedocomplex most likely correlates with the Marine Oxygen Isotope Stage (MIS) 5 interglacial period. The loess from below the pedocomplex was deposited during the penultimate glaciation, as evidenced by amino acid racemization (AAR) results. Further independent age control is provided by radiocarbon dating for the upper part of the profile and by uranium-series (230Th/234U) ages correlating the travertine below the loess with MIS 7–8. The magnetic susceptibility record through the sequence shows a strong correlation with the loess layers and soil horizons.