Isotopic composition of gypsum hydration water in deep Core SG-1, western Qaidam basin (NE Tibetan Plateau), implications for paleoclimatic evolution
文献类型：期刊论文
| 作者 | Li, J (Li, Jiao)1,2,3; Li, MH (Li, Minghui)1,4; Fang, XM (Fang, Xiaomin)1,2,5; Zhang, GX (Zhang, Gengxin)1,5,6; Zhang, WL (Zhang, Weilin)1,2,5; Liu, XM (Liu, Xiaoming)1,2; Li, MH |
| 刊名 | GLOBAL AND PLANETARY CHANGE
 |
| 出版日期 | 2017 |
| 卷号 | 155期号:0页码:70-77 |
| 关键词 | Midpleistocene Climate Transition Resolution Magneto Stratigraphy Chinese Loess Plateau Cenozoic Deformation Evaporite Minerals Qinghai Province American-west Southern Asia Central Iran m Sediments |
| DOI | 10.1016/j.gloplacha.2017.06.006 |
| 文献子类 | Article |
| 英文摘要 | The oxygen and hydrogen isotopic compositions of gypsum hydration water can be useful for determining the isotopic composition of the original brine from which gypsum precipitated. However, relatively few long-term and continuous records of the stable isotope geochemistry of gypsum hydration water in arid regions have been reported. We measured the 8180 and SD of primary gypsum hydration water from a 938.5 m-long deep core (SG-1) in the western Qaidam Basin to study the mechanisms that contributed to gypsum formation and to reconstruct potential paleoclimatic change. The measured delta O-18 and delta D ranged from - 4.21%o to 8.69%o and from - 72.77%o to 49.73%o, respectively. The linear relationship between delta O-18 and delta D indicates that meteoric water was the original source of the gypsum hydration water. The gradient of 5.39 for the delta O-18 and SD plots is lower than that of global meteoric water, suggesting that paleo-lakewater evaporated and became a CaSO4-rich brine leading to gypsum deposition. The evaporation/precipitation (E/P) ratio played an important role in determining delta O-18 and SD. The oscillations noted in the delta O-18 and SD of the gypsum hydration water imply that: (a) there was a long-term and stepwise aridification after similar to 2.2 Ma in the western Qaidam Basin; and (b) there were three increasingly dry phases at 2.2-1.2 Ma, 1.2-0.6 Ma, and 0.6-0.1 Ma, with two cold and dry events at similar to 1 Ma and similar to 0.6 Ma. Global cooling, especially during the Mid Pleistocene Climate Transition event (MPT), may have been the primary cause of the aridification recorded in core SG-1 in the Asian inland. |
| 学科主题 | 地质学 |
| WOS研究方向 | Physical Geography; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000408783700007 |
| 源URL | [http://ir.itpcas.ac.cn/handle/131C11/8011]  |
| 专题 | 青藏高原研究所_图书馆 |
| 通讯作者 | Li, MH |
| 作者单位 | 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China. 2.Chinese Acad Sci, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China. 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China. 4.Chinese Acad Sci, Key Lab Tibetan Environm Changes & Land Surface P, Beijing 100101, Peoples R China. 5.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China. 6.Chinese Acad Sci, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Li, J ,Li, MH ,Fang, XM ,et al. Isotopic composition of gypsum hydration water in deep Core SG-1, western Qaidam basin (NE Tibetan Plateau), implications for paleoclimatic evolution[J]. GLOBAL AND PLANETARY CHANGE,2017,155(0):70-77. |
| APA | Li, J .,Li, MH .,Fang, XM .,Zhang, GX .,Zhang, WL .,...&Li, MH.(2017).Isotopic composition of gypsum hydration water in deep Core SG-1, western Qaidam basin (NE Tibetan Plateau), implications for paleoclimatic evolution.GLOBAL AND PLANETARY CHANGE,155(0),70-77. |
| MLA | Li, J ,et al."Isotopic composition of gypsum hydration water in deep Core SG-1, western Qaidam basin (NE Tibetan Plateau), implications for paleoclimatic evolution".GLOBAL AND PLANETARY CHANGE 155.0(2017):70-77. |
入库方式： OAI收割
来源：青藏高原研究所
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