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| DOI | 10.1016/j.quageo.2024.101501 |
| Thermoluminescence dating of gypsum in loess deposits | |
| 发表日期 | 2024 |
| ISSN | 1871-1014 |
| EISSN | 1878-0350 |
| 起始页码 | 81 |
| 卷号 | 81 |
| 英文摘要 | Gypsum deposits within loess deposits are an important indicator of weathering processes and climate change. We conducted a thermoluminescence (TL) dating study of the gypsum from loess deposits of the Jiuzhoutai section in the western Chinese Loess Plateau. Determination of the equivalent doses (D-e) of gypsum samples was conducted using several protocols, including single-aliquot regenerative-dose (SAR-TL), multiple-aliquot additive dose (MAAD-TL), and Isothermal TL of SAR (SAR-ITL). The TL glow peak at 280 degrees C was targeted because of its reported stable signals. The test dose check, estimation of sensitivity changes, and the dose recovery test were applied to assess the applicability of the different protocols, and the characteristics of the thermoluminescence signals for gypsum were evaluated. The D-e results for the SAR-TL, MAAD-TL, and SAR-ITL protocols were within the error ranges. Among the three protocols, SAR-ITL did not involve high-temperature heating and it provided a more accurate D-e value, and thus it was used for D-e determinations for gypsum dating. With a dose rate of 1.74 +/- 0.07 Gy/ka, the minimum TL age of the gypsum veins was similar to 182 +/- 7 ka. U-series dating was also applied to the same samples for comparison. However, the extremely low ratio of Th-230/Th-232 (<= 4 x 10(-6)) of the gypsum veins deposited within the loess resulted in a large error of the U-series dates. We conclude that TL dating is more appropriate for the dating of gypsum in loess deposits. |
| 英文关键词 | Loess; Gypsum; Annual dose estimation; TL dating protocols; 230Th/232Th ratio |
| 语种 | 英语 |
| WOS研究方向 | Physical Geography ; Geology |
| WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001206391900001 |
| 来源期刊 | QUATERNARY GEOCHRONOLOGY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/299686 |
| 作者单位 | Guangzhou University; Chinese Academy of Sciences; Nanjing Normal University; Lanzhou University; Lanzhou University; Xi'an Jiaotong University |
| 推荐引用方式 GB/T 7714 | . Thermoluminescence dating of gypsum in loess deposits[J],2024,81. |
| APA | (2024).Thermoluminescence dating of gypsum in loess deposits.QUATERNARY GEOCHRONOLOGY,81. |
| MLA | "Thermoluminescence dating of gypsum in loess deposits".QUATERNARY GEOCHRONOLOGY 81(2024). |
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