Reconstruction of paleotemperatures in loess sequences plays a crucial role in paleoclimate research. Depositional-origin hematite is considered a major contributor to high-field isothermal remanence (HIRM), which is closely related to temperature. However, there is limited knowledge regarding hematite of various origins that contributes to the HIRM in Tibetan Plateau (TP) loess deposits. Here, the variation in and contributions of hematites of various origins to HIRM in the Ganzi loess of the eastern Tibetan Plateau (ETP) and their paleoclimatic significance are investigated in detail. We find that depositional hematite is the main contributor to HIRM in the ETP loess and HIRM can be used as an indicator of temperature variation on the TP. During the interglacial period, the TP dust source became more arid, which was conducive to production of more hematite. During the glacial period, the TP dust source region became colder and drier, which was not conducive to the formation of hematite. The HIRM record shows that the TP temperature has varied with orbital-scale glacial-interglacial changes since the last interglacial period. This was mainly in response to Northern Hemisphere summer insolation. The loess source region in the interior of the TP was warmest during the last interglacial period (MIS 5) and the Holocene. Its coldest period occurred during MIS 2. The climate was relatively mild during MIS 3. This study provides further understanding of environmental changes in the TP.

黄土层序古温度重建在古气候研究中具有重要作用。沉积起源的赤铁矿被认为是与温度密切相关的高场等温剩磁 (HIRM) 的主要贡献者。然而，关于导致青藏高原 (TP) 黄土沉积物中 HIRM 的各种来源的赤铁矿的知识有限。在这里，详细研究了青藏高原东部甘孜黄土（ETP）中不同来源赤铁矿对HIRM的变化和贡献及其古气候意义。我们发现沉积赤铁矿是 ETP 黄土中 HIRM 的主要贡献者，HIRM 可用作 TP 温度变化的指标。间冰期，TP尘源变得更加干旱，这有利于生产更多的赤铁矿。冰期期间，TP尘源区变得更冷、更干燥，不利于赤铁矿的形成。HIRM 记录显示，自上次间冰期以来，TP 温度随轨道尺度的冰期-间冰期变化而变化。这主要是为了应对北半球夏季日照。青藏高原内部的黄土源区在末次间冰期（MIS 5）和全新世期间最为温暖。其最冷期出现在MIS 2 期间。MIS 3 期间气候相对温和。这项研究为进一步了解青藏高原的环境变化提供了依据。HIRM 记录显示，自上次间冰期以来，TP 温度随轨道尺度的冰期-间冰期变化而变化。这主要是为了应对北半球夏季日照。青藏高原内部的黄土源区在末次间冰期（MIS 5）和全新世期间最为温暖。其最冷期出现在MIS 2 期间。MIS 3 期间气候相对温和。这项研究为进一步了解青藏高原的环境变化提供了依据。HIRM 记录显示，自上次间冰期以来，TP 温度随轨道尺度的冰期-间冰期变化而变化。这主要是为了应对北半球夏季日照。青藏高原内部的黄土源区在末次间冰期（MIS 5）和全新世期间最为温暖。其最冷期出现在MIS 2 期间。MIS 3 期间气候相对温和。这项研究为进一步了解青藏高原的环境变化提供了依据。