| Holocene climate changes in westerly-dominated areas of central Asia: Evidence from optical dating of two loess sections in Tianshan Mountain, China | |
| Zhao, Hui1; Li, Sheng-Hua2; Li, Bo3; Li, Guo-Qiang4 | |
| 刊名 | QUATERNARY GEOCHRONOLOGY
 |
| 2015-10-01 | |
| 卷号 | 30页码:188-193 |
| 关键词 | OSL MET-pIRIR Loess-paleosol sequence Westerly Monsoon Holocene |
| ISSN号 | 1871-1014 |
| DOI | 10.1016/j.quageo.2015.04.002 |
| 通讯作者 | Zhao, Hui(hzhao@lzb.ac.cn) |
| 英文摘要 | Optical dating was applied to two loess-paleosol sections (Lujiaowan and Shuixigou) from the northern piedmont of Tianshan Mountain, Xinjiang province, China. The two sections are over 200 km apart and have a similar depositional sequence, which consists of two paleosol layers embedded by one loess layer. Two difficulties were met in optical dating. First, because the sections are located on the slope of the mountain, it was found that some cliff debris, with coarse grains (>200 mu m), were mixed with the eolian sediments by rainfall, especially in the paleosol layers. Second, the optically stimulated luminescence (OSL) signals of quartz grains from the deposits were too dim to obtain a reliable equivalent dose (D-e). The 63-90 mu m K-feldspar grains were separated to decrease the debris portion, and they yielded bright infrared stimulated luminescence (IRSL) signals. A multiple-elevated-temperature post-IR IRSL (MET-pIRIR) procedure was applied to determine D-e. Comparing the optical dating ages of the two sections, the Lujiaowan (LJW) and Shuixigou (SXG) sections recorded almost the same depositional process during the Holocene. The ages of the two loess layers (2.44-3.38 ka at LJW; 2.47-4.36 ka at SXG) suggested that one drought event happened widely in this westerly dominated area. The same drought event 2.5-3.5 ka ago also happened in the Chinese Loess Plateau (CLP), where the summer monsoon dominated. However, the paleosol development period (6.6-4 ka) in the study area was distinguished from the monsoon dominated area (8-4 ka), which suggests an arid early Holocene in the westerly area. (C) 2015 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | K-FELDSPAR GRAINS ; NW CHINA ; LUMINESCENCE ; SEDIMENTS ; XINJIANG ; PROTOCOL ; BASIN ; PLATEAU ; MONSOON ; DESERT |
| WOS研究方向 | Physical Geography ; Geology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000366538200010 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2557144 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Zhao, Hui |
| 作者单位 | 1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Lanzhou, Peoples R China 2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 3.Univ Wollongong, Sch Earth & Environm Sci, Ctr Archaeol Sci, Wollongong, NSW 2522, Australia 4.Lanzhou Univ, MOE Key Lab Western Chinas Environm Syst, CAEP, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Hui,Li, Sheng-Hua,Li, Bo,et al. Holocene climate changes in westerly-dominated areas of central Asia: Evidence from optical dating of two loess sections in Tianshan Mountain, China[J]. QUATERNARY GEOCHRONOLOGY,2015,30:188-193. |
| APA | Zhao, Hui,Li, Sheng-Hua,Li, Bo,&Li, Guo-Qiang.(2015).Holocene climate changes in westerly-dominated areas of central Asia: Evidence from optical dating of two loess sections in Tianshan Mountain, China.QUATERNARY GEOCHRONOLOGY,30,188-193. |
| MLA | Zhao, Hui,et al."Holocene climate changes in westerly-dominated areas of central Asia: Evidence from optical dating of two loess sections in Tianshan Mountain, China".QUATERNARY GEOCHRONOLOGY 30(2015):188-193. |
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