横贝加尔湖畔查拉冰楔的全新世早期氧同位素年代学（11267-6420 卡平方公里

IF 2 3区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Radiocarbon Pub Date : 2024-04-04 DOI:10.1017/rdc.2024.34

Yurij K Vasil’chuk, Alla C Vasil’chuk, Nadine A Budantseva, Alexander P Ginzburg, Igor V Tokarev, Jessica Yu Vasil’chuk

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引用次数: 0

摘要

加速器质谱放射性碳（AMS 14C）测定法用于确定楔冰的年龄。研究发现，在公元前 11,270 年至公元前 6420 年之间，即全新世的格陵兰期和北格里皮期，冰楔在查拉河流域的砂砾沉积物中合成生长。冰楔的δ18O值变化约为8‰，从-25.5‰到-18.8‰。根据冰楔的稳定同位素组成，古温度重建显示，在全新世早期最寒冷的时期，一月平均温度低至-38°C，而在较温暖的时期，一月平均温度则高达-28°C。

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EARLY HOLOCENE OXYGEN ISOTOPE CHRONOLOGIES (11,267–6420 CAL BP) FROM ICE WEDGE AT CHARA, TRANSBAIKALIA

Accelerator mass spectrometry radiocarbon (AMS 14C) dating was used for determining the age of wedge ice. It has been found that between 11,270 and 6420 cal BP, or the Greenlandian and Northgrippian stages of the Holocene, ice wedges grew syngenetically in sandy deposits with gravel in the Chara River valley. The variations of δ18O values in the ice wedges are about 8‰, from –25.5‰ to –18.8‰. Based on the stable isotope composition of ice wedges, paleotemperature reconstructions revealed that the mean January temperature was as low as –38°C during the coldest periods of the early half of the Holocene and as high as –28°C during the warmer periods.

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来源期刊

Radiocarbon 地学-地球化学与地球物理

CiteScore

16.20

自引率

6.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Radiocarbon serves as the leading international journal for technical and interpretive articles, date lists, and advancements in 14C and other radioisotopes relevant to archaeological, geophysical, oceanographic, and related dating methods. Established in 1959, it has published numerous seminal works and hosts the triennial International Radiocarbon Conference proceedings. The journal also features occasional special issues. Submissions encompass regular articles such as research reports, technical descriptions, and date lists, along with comments, letters to the editor, book reviews, and laboratory lists.