Abstract Here we present loess deposit since the late glacial dated by OSL technique in the southeast of the Caspian Sea, bordering continents of Asia and Europe. Chronology of loess deposits are rarely reported in Eastern Europe and Western Asia, especially for their spacious mid-latitude adjacent region, between Balkans to the west and Pamirs to the east. In this study, an OSL-based chronology was developed for loess deposits in northern Iranian Plateau, based on the YBD loess profile which locates close to center of hilly Iranian Loess Plateau in the southeast of the Caspian Sea and on the northern slope of the Alborz Mountains. The OSL characteristics and their reliability were investigated on coarse-grained quartz (63–90 μm) of the profile, a preheat plateau test and dose recovery test of which reveal that the lower preheat is suitable for loess equivalent dose determination in the area. In addition, the SAR-OSL is an appropriate methodology for dating loess deposited since the late glacial in situ. With preservation of a complete record of loess accumulation since the late glacial, YBD section contains a potentially valuable paleoclimatic record for Caspian region and hence the vast transitional region between Asia and Europe.

中文翻译：

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里海东南部晚冰期以来黄土沉积物的石英OSL定年

摘要 在这里，我们展示了在里海东南部，与亚洲和欧洲大陆接壤的晚冰期以来的黄土沉积，通过 OSL 技术确定了年代。东欧和西亚很少报道黄土沉积的年代学，特别是它们广阔的中纬度相邻地区，西部巴尔干半岛和东部帕米尔高原之间。在这项研究中，基于位于里海东南部和阿尔伯兹北坡丘陵伊朗黄土高原中心附近的 YBD 黄土剖面，开发了基于 OSL 的伊朗高原北部黄土沉积年表山。OSL 特性及其可靠性在轮廓的粗粒石英（63-90 μm）上进行了研究，预热平台试验和剂量恢复试验表明，较低的预热温度适用于该地区黄土等效剂量测定。此外，SAR-OSL 是对晚冰期以来沉积的黄土原位定年的合适方法。YBD剖面保存了晚冰期以来黄土堆积的完整记录，为里海地区乃至亚欧之间广阔的过渡区提供了具有潜在价值的古气候记录。