Arid
DOI10.1016/j.gr.2021.08.008
HIRM variation in the Ganzi loess of the eastern Tibetan Plateau since the last interglacial period and its paleotemperature implications for the source region
Chen, Zixuan; Yang, Shengli; Luo, Yuanlong; Chen, Hui; Liu, Li; Liu, Xiaojing; Wang, Shuyuan; Yang, Junhuai; Tian, Weidong; Xia, Dunsheng
Corresponding AuthorYang, SL (corresponding author), Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China.
JournalGONDWANA RESEARCH
ISSN1342-937X
EISSN1878-0571
Year Published2022
Volume101Pages:233-242
Abstract in EnglishReconstruction 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. (c) 2021 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
Keyword in EnglishGanzi loess HIRM Hematite Dust source area Chuanxi Plateau Paleotemperature
SubtypeArticle
Language英语
Indexed BySCI-E
WOS IDWOS:000702914600003
WOS KeywordDIFFUSE-REFLECTANCE SPECTROSCOPY ; CHINESE LOESS ; MAGNETIC-SUSCEPTIBILITY ; PALEOSOL SEQUENCES ; ACQUISITION CURVES ; PEDOGENIC HEMATITE ; CLIMATE-CHANGE ; QUANTIFICATION ; RECONSTRUCTION ; TEMPERATURE
WOS SubjectGeosciences, Multidisciplinary
WOS Research AreaGeology
Source Institution兰州大学
Document Type期刊论文
Identifierhttp://119.78.100.177/qdio/handle/2XILL650/363483
Affiliation[Chen, Zixuan; Yang, Shengli; Luo, Yuanlong; Chen, Hui; Liu, Li; Liu, Xiaojing; Wang, Shuyuan; Yang, Junhuai; Tian, Weidong; Xia, Dunsheng] Lanzhou Univ, Coll Earth & Environm Sci, Key Lab Western Chinas Environm Syst, Minist Educ, Lanzhou 730000, Peoples R China
Recommended Citation
GB/T 7714
Chen, Zixuan,Yang, Shengli,Luo, Yuanlong,et al. HIRM variation in the Ganzi loess of the eastern Tibetan Plateau since the last interglacial period and its paleotemperature implications for the source region[J]. 兰州大学,2022,101:233-242.
APA Chen, Zixuan.,Yang, Shengli.,Luo, Yuanlong.,Chen, Hui.,Liu, Li.,...&Xia, Dunsheng.(2022).HIRM variation in the Ganzi loess of the eastern Tibetan Plateau since the last interglacial period and its paleotemperature implications for the source region.GONDWANA RESEARCH,101,233-242.
MLA Chen, Zixuan,et al."HIRM variation in the Ganzi loess of the eastern Tibetan Plateau since the last interglacial period and its paleotemperature implications for the source region".GONDWANA RESEARCH 101(2022):233-242.
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