| 江苏省苏北盆地洪泽凹陷古新世时期的古环境: 来自微体古生物学与蒸发岩的证据 |
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| 引用本文： | 刘兆成,孟凡巍,周绍荣.江苏省苏北盆地洪泽凹陷古新世时期的古环境: 来自微体古生物学与蒸发岩的证据[J].盐湖研究,2021,29(4). |
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| 作者姓名： | 刘兆成 孟凡巍 周绍荣 |
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| 作者单位： | 淮安市地质矿产勘查院,中国科学院南京地质古生物研究所,淮安市地质矿产勘查院 |
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| 摘 要： | 第三纪古新世—始新世极热事件（PETM事件： Paleocene-Eocene Thermal Maximum），被认为是最类似于现今的温室效应。江苏省苏北盆地洪泽凹陷沉积了一套巨厚的古新世时期的蒸发岩，提供了该时期的陆地记录。蒸发岩对气候极为敏感，因此可以记录古代气候的信息。本次研究从苏北盆地洪泽凹陷钻孔中，通过SEM-EDS的方法识别出了无水芒硝和钙芒硝，这些暖相矿物的出现吻合第三纪古新世—始新世极热事件时期的极端高温环境；而苏打石的出现则表明该时期大致为现代大气三倍浓度的极高CO2含量。
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| 关 键 词： | PETM事件，古新世，蒸发岩，洪泽凹陷，无水芒硝， 钙芒硝，苏打石 |
| 收稿时间： | 2021/1/13 0:00:00 |
| 修稿时间： | 2021/8/19 0:00:00 |
Paleoenvironment of Paleocene in Hongze Depression, Subei basin, Jiangsu Province: evidence from micropaleology and evaporite |
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| Liu Zhaocheng,Meng Fanwei and Zhou Shaorong.Paleoenvironment of Paleocene in Hongze Depression, Subei basin, Jiangsu Province: evidence from micropaleology and evaporite[J].Journal of Salt Lake Research,2021,29(4). |
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| Authors: | Liu Zhaocheng Meng Fanwei and Zhou Shaorong |
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| Institution: | Huai''an Geological and Mineral Exploration Institute,State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences,Huai''an Geological and Mineral Exploration Institute |
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| Abstract: | The PETM event (Paleocene-Eocene thermal maximum) is considered to be the most similar to the present greenhouse effect. A set of evaporating salt in Paleocene was deposited in Hongze Depression of Jiangsu Province, which provides land record of this period. Evaporite is very sensitive to climate, so it can record information of ancient climate. In this study, anhydrous mirabilite and glauberite were identified by SEM-EDS from the borehole of Hongze Depression in the northern Jiangsu Basin. The occurrence of these minerals in high temperature environment coincides with the extreme high temperature environment during the Eocene Eocene extreme heat event period; the occurrence of nahcolite shows that the time period is about three times the high CO2 content in the modern atmosphere. |
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