| 渤海莱州湾地区晚更新世以来有孔虫特征反映的古环境变化 |
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| 引用本文： | 姚菁,于洪军,徐兴永,易亮,陈广泉,苏乔.渤海莱州湾地区晚更新世以来有孔虫特征反映的古环境变化[J].海洋学报(英文版),2014,33(10):10-18. |
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| 作者姓名： | 姚菁 于洪军 徐兴永 易亮 陈广泉 苏乔 |
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| 作者单位： | 中国科学院海洋地质与环境重点实验室, 中国科学院海洋研究所, 青岛 266071, 中国;国家海洋局海洋沉积与环境地质重点实验室, 国家海洋局第一海洋研究所, 青岛 266061, 中国;中国科学院大学, 北京100049, 中国;国家海洋局海洋沉积与环境地质重点实验室, 国家海洋局第一海洋研究所, 青岛 266061, 中国;国家海洋局海洋沉积与环境地质重点实验室, 国家海洋局第一海洋研究所, 青岛 266061, 中国;岩石圈演化国家重点实验室, 中国科学院地质与地球物理研究所, 北京100029, 中国;国家海洋局海洋沉积与环境地质重点实验室, 国家海洋局第一海洋研究所, 青岛 266061, 中国;国家海洋局海洋沉积与环境地质重点实验室, 国家海洋局第一海洋研究所, 青岛 266061, 中国 |
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| 基金项目： | The National Basic Research Program of China (973 Program) under contract No. 2010CB951200; the Marine Public Service Specific Research under contract No. 201105020. |
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| 摘 要： | Controlled by climate changes, there were three large-scale transgressions and regressions around the Bohai Sea during the late Quaternary, which were accepted by most geologists. However, a big controversy still exists about the time when the transgressions occurred separately. In order to find out the process of the paleoenvironmental changes around the Bohai Sea in the late Quaternary, the foraminifera assemblages from a new borehole Lz908 in the southern coast of the Laizhou Bay were studied, and then the transgressive strata were indentified. Combined with accelerator mass spectrometry radiocarbon 14C（AMS14C） and optically stimulated luminescence（OSL） ages, the occurrence time of these transgressions were re-determined. The result showed that three major large-scale transgressions occurred separately at the beginning of marine isotopic stage 7（MIS7）, the last interglacial period（MIS5） and the Holocene. In addition, a small-scale transgression occurred in the mid-MIS6, and the corresponding transgressive stratum was deposited. The transgressive deposition of MIS3 was also discovered in this study. However, the characteristics of the foraminifera indicated the environment during this period was colder than that in the MIS5. By comparison with the global sea-level changes, the paleoenvironmental changes around the Bohai Sea in the late Quaternary can be consistent with the global climate changes.
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| 关 键 词： | 第四纪晚期 古环境变化 莱州湾南岸 有孔虫 全球气候变化 全球海平面变化 地层沉积 发生时间 |
| 收稿时间： | 6/5/2013 12:00:00 AM |
| 修稿时间： | 2013/11/27 0:00:00 |
Paleoenvironmental changes during the late Quaternary as inferred from foraminifera assemblages in the Laizhou Bay |
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| Yao Jing,Yu Hongjun,Xu Xingyong,Yi Liang,Chen Guangquan and Su Qiao.Paleoenvironmental changes during the late Quaternary as inferred from foraminifera assemblages in the Laizhou Bay[J].Acta Oceanologica Sinica,2014,33(10):10-18. |
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| Authors: | Yao Jing Yu Hongjun Xu Xingyong Yi Liang Chen Guangquan and Su Qiao |
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| Institution: | 1. Key Laboratory of Marine Geology and Environment, Institute of 0ceanology, Chinese Academy of Sciences, Qingdao 266071, China
2. Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of 0ceanography, State 0ceanic Administration, Qingdao 266061, China |
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| Abstract: | Controlled by climate changes, there were three large-scale transgressions and regressions around the Bohai Sea during the late Quaternary, which were accepted by most geologists. However, a big controversy still exists about the time when the transgressions occurred separately. In order to find out the process of the paleoenvironmental changes around the Bohai Sea in the late Quaternary, the foraminifera assemblages from a new borehole Lz908 in the southern coast of the Laizhou Bay were studied, and then the transgressive strata were indentified. Combined with accelerator mass spectrometry radiocarbon 14C (AMS14C) and optically stimulated luminescence (OSL) ages, the occurrence time of these transgressions were re-determined. The result showed that three major large-scale transgressions occurred separately at the beginning of marine isotopic stage 7 (MIS7), the last interglacial period (MIS5) and the Holocene. In addition, a small-scale transgression occurred in the mid-MIS6, and the corresponding transgressive stratum was deposited. The transgressive deposition of MIS3 was also discovered in this study. However, the characteristics of the foraminifera indicated the environment during this period was colder than that in the MIS5. By comparison with the global sea-level changes, the paleoenvironmental changes around the Bohai Sea in the late Quaternary can be consistent with the global climate changes. |
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| Keywords: | foraminifera assemblage late Quaternary environmental changes Laizhou Bay Bohai Sea |
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