An assessment and comparison of Th-230 and AMS C-14 ages for lacustrine sediments from Qarhan Salt Lake area in arid western China
文献类型：期刊论文
| 作者 | Fan, QiShun1 ; Ma, HaiZhou1; Ma, ZhiBang2; Wei, HaiCheng1; Han, FengQing1
|
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2014-02-01 |
| 卷号 | 71期号:3页码:1227-1237 |
| 关键词 | Th-230 And Ams C-14 Dating The Forming Timing Of The Bottom Salt Layer Qarhan Salt Lake Qaidam Basin |
| 文献子类 | Article |
| 英文摘要 | The age framework of Qarhan Salt Lake in arid western China is still controversial due in part to (1) age discrepancy between conventional C-14 and Th-230 dating results, and (2) no AMS C-14 ages of organic carbon from drilling cores in Qarhan Salt Lake were reported until now. In order to discuss these chronological problems, upper 54.50 m lacustrine sediments from a drilling core (ISL1A) recovered from Qarhan Salt Lake were dated based on Th-230 and AMS C-14 dating techniques. Results show that (1) AMS C-14 ages of total organic carbon (TOC) from 4.65 to 30.29 m are almost in stratigraphic order and consistent with Th-230 ages of halite in the corresponding layers; (2) AMS C-14 ages of TOC from 30.29 to 54.50 m are younger with increasing depth. This phenomenon was also found in Shell Bar in the study area, suggesting that AMS C-14 ages from upper 30.29 m are more reliable while those from lower 24.21 m in ISL1A may be underestimated; (3) Th-230 ages of halite from lower 24 m lacustrine sediments are obviously older than AMS C-14 ages of TOC in the corresponding layers, which results into different age framework of salt lake sediments in Qarhan Salt Lake; (4) if extrapolating these reliable AMS C-14 ages in ISL1A, similar age framework with Th-230 ages in this core confirms that Th-230 ages are much close to the true ages of these sediments, which suggests that the forming timing of the bottom salt layer is similar to 50 ka. |
| WOS关键词 | TIBETAN PLATEAU ; QAIDAM BASIN ; NW CHINA ; NORTHWESTERN CHINA ; MASS-SPECTROMETRY ; STABLE-ISOTOPES ; CLIMATIC-CHANGE ; QINGHAI LAKE ; CENTRAL-ASIA ; PLAYA LAKE |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000330124100021 |
| 源URL | [http://ir.isl.ac.cn/handle/363002/5667]  |
| 专题 | 青海盐湖研究所_青海盐湖研究所知识仓储 青海盐湖研究所_盐湖地质与环境实验室 青海盐湖研究所_管理部门 |
| 作者单位 | 1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Geol & Environm Salt Lake, Xining 810008, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Cenozo Geol & Environm, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Fan, QiShun,Ma, HaiZhou,Ma, ZhiBang,et al. An assessment and comparison of Th-230 and AMS C-14 ages for lacustrine sediments from Qarhan Salt Lake area in arid western China[J]. ENVIRONMENTAL EARTH SCIENCES,2014,71(3):1227-1237. |
| APA | Fan, QiShun,Ma, HaiZhou,Ma, ZhiBang,Wei, HaiCheng,&Han, FengQing.(2014).An assessment and comparison of Th-230 and AMS C-14 ages for lacustrine sediments from Qarhan Salt Lake area in arid western China.ENVIRONMENTAL EARTH SCIENCES,71(3),1227-1237. |
| MLA | Fan, QiShun,et al."An assessment and comparison of Th-230 and AMS C-14 ages for lacustrine sediments from Qarhan Salt Lake area in arid western China".ENVIRONMENTAL EARTH SCIENCES 71.3(2014):1227-1237. |
入库方式： OAI收割
来源：青海盐湖研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。