DOI: 10.1016/j.palaeo.2015.07.022
论文题名: Quantitative temperature records of mid Cretaceous hothouse: Evidence from halite fluid inclusions
作者: Zhang H. ; Liu C. ; Zhao Y. ; Mischke S. ; Fang X. ; Ding T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 437 起始页码: 33
结束页码: 41
语种: 英语
英文关键词: Halite fluid inclusions
; Laos
; Mid Cretaceous
; Potash deposits
; Quantitative temperature reconstructions
英文摘要: Quantitative temperature reconstructions for the mid Cretaceous are still rare although its typical greenhouse climate is regarded as one of the best analogues for future global warming. For the first time, mid Cretaceous temperatures were quantitatively reconstructed based on homogenization temperatures (Th) of halite fluid inclusions from the Lower Member of the Nong Bok Formation in the Thakhek mining area, Laos. Petrological features and primary textures of halite indicate a shallow water setting during halite formation that allows the use of homogenization temperatures as air temperature proxy. Obtained homogenization temperatures mainly range from 30 to 50°C, probably representing local air temperature conditions of Laos during the mid Cretaceous. The determined temperatures are relatively similar to temperatures in many modern and ancient evaporative settings. The maximum homogenization temperature (ThMax) for the Nong Bok Formation of 62.1°C is significantly higher than existing mid Cretaceous paleotemperature records from both continental and marine sediments and comparable with the temperature records from the contemporaneous Mengyejing Formation of Yunnan, Southern China. The correspondence of the temperature records from Laos and Yunnan implies that very high temperature conditions prevailed in the region. Our results and other reconstructed very high temperatures from potash deposits (e.g., 59°C for the Silurian Michigan Basin and 58°C for the Quaternary Lop Nur region) suggest that extremely high temperatures probably had an important impact on the formation of the large potash deposits of the world. However, more studies are needed to improve our understanding of the detailed and quantitative relationships between temperature conditions and potash formation. © 2015 Elsevier B.V.. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68829
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, China; Department of Geological Sciences, Freie Universität Berlin, Malteserstr, 74-100, Berlin, Germany; Faculty of Earth Sciences, University of Iceland, Sturlugata 7, Askja, Reykjavík, Iceland; Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China; China University of Geosciences, Beijing, China
Recommended Citation:
Zhang H.,Liu C.,Zhao Y.,et al. Quantitative temperature records of mid Cretaceous hothouse: Evidence from halite fluid inclusions[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,437