An accurate chronological framework is vital if we are to use lacustrine sediments on the Tibetan Plateau (TP) for paleoclimate reconstruction. Radiocarbon (¹⁴C) dating is the most frequently used method for dating late Quaternary lacustrine sediments. However, it is often affected by potential reservoir effects. Owing to the complex hydrogeology and sedimentology processes of the lake we study in this paper, it is difficult to correct this effect. Geomagnetic relative paleointensity (RPI) method has demonstrated the potential to construct an accurate high-resolution chronological framework for sediments in the Brunhes chron. In this study, we present an RPI record as well as environmental magnetism results from a core (HL) on the Hurleg Lake in the northeast TP. We aim to determine the reservoir effect and establish an accurate timescale for the core. The RPI record was constructed by normalizing the natural remanent magnetization after 30 mT alternating field demagnetization with saturation isothermal remanent magnetization (NRM_30mT/SIRM). This exhibits a general agreement with other geomagnetic intensity stacks from the world, suggesting that global-scale patterns of geomagnetic paleointensity behavior were also documented in Hurleg Lake sediments. Our RPI record can be adequately matched to RPI references to provide three additional age tie points for the HL core. We then evaluated the reservoir effect and constructed a timescale for the core using chronological controls from both RPI and ¹⁴C dating. The estimated RE age was weak below 272 cm, was 2–3 ka at the upper 50 cm, and was inferred to have increased between depths of 272 and 50 cm. Environmental magnetism sequences from core HL display a similar paleoclimatic pattern with records from core HL05-2 and core K-2 both in the Hurleg Lake area, suggesting that correction for the radiocarbon reservoir effect is accurate and timescale of core HL is reliable. Our study further demonstrates that the method of obtaining age control points from RPI is applicable to lake sediments on the TP.

如果我们要使用青藏高原（TP）上的湖相沉积物进行古气候重建，那么准确的时间顺序框架至关重要。放射性碳（¹⁴C）年代测定是晚期第四纪湖相沉积物最常用的年代测定方法。但是，它经常受到潜在储层作用的影响。由于本文研究的湖泊复杂的水文地质学和沉积学过程，很难纠正这种影响。地磁相对古强度（RPI）方法已证明有可能为Brunhes年代的沉积物建立准确的高分辨率年代学框架。在这项研究中，我们提供了RPI记录以及东北TP的Hurleg湖上一个磁芯（HL）的环境磁结果。我们旨在确定储层效应，并为岩心确定准确的时间表。_30mT / SIRM）。这显示出与世界上其他地磁强度叠加层的总体一致，这表明在Hurleg湖沉积物中也记录了全球范围的地磁古强度行为模式。我们的RPI记录可以与RPI参考充分匹配，以为HL核心提供三个附加的年龄限制点。然后，我们使用RPI和^14的时间控制，评估了储层效应并为岩心建立了时间尺度C约会。估计的RE年龄在272 cm以下较弱，在上部50 cm为2-3 ka，并推断在272和50 cm的深度之间已增加。Hurleg湖地区的HL核心环境磁序列显示出与古气候模式相似的记录，都来自Hurleg Lake地区的HL05-2核心和K-2核心。我们的研究进一步表明，从RPI获取年龄控制点的方法适用于TP上的湖泊沉积物。