| Isotopic composition of gypsum hydration water in deep Core SG-1, western Qaidam basin (NE Tibetan Plateau), implications for paleoclimatic evolution | |
| 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 | |
| Source Publication | GLOBAL AND PLANETARY CHANGE
 |
| 2017 | |
| Volume | 155Issue:0Pages:70-77 |
| DOI | 10.1016/j.gloplacha.2017.06.006 |
| Abstract | 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. |
| Subject Area | 地质学 |
| WOS ID | WOS:000408783700007 |
| Language | 英语 |
| Indexed By | SCI |
| Keyword | Midpleistocene Climate Transition Resolution Magneto Stratigraphy Chinese Loess Plateau Cenozoic Deformation Evaporite Minerals Qinghai Province American-west Southern Asia Central Iran m Sediments |
| WOS Research Area | Physical Geography; Geology |
| WOS Subject | Geography, Physical; Geosciences, Multidisciplinary |
| Cooperation Status | 国内 |
| Subtype | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.itpcas.ac.cn/handle/131C11/8011 |
| Collection | 图书馆 |
| Corresponding Author | Li, MH |
| Affiliation | 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. |
| Recommended Citation 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| V.155 70-77 2017.pdf（911KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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