| Thermal Ionization Mass Spectrometry （TIMS）－U－Series Ages of Corals from the South China Sea and Holocene High Sea Level |
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| 引用本文： | 彭子成,何学贤,罗晓忠,贺剑峰,刘桂建,聂宝符.Thermal Ionization Mass Spectrometry （TIMS）－U－Series Ages of Corals from the South China Sea and Holocene High Sea Level[J].中国地球化学学报,2003,22(2):133-139. |
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| 作者姓名： | 彭子成 何学贤 罗晓忠 贺剑峰 刘桂建 聂宝符 |
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| 作者单位： | Department of Earth and Space Sciences，University of Science and Technology of China，Department of Earth and Space Sciences，University of Science and Technology of China，Department of Geological Sciences，Michigan University，Department of Earth and Space Sciences，University of Science and Technology of China，Department of Earth and Space Sciences，University of Science and Technology of China，South China Sea Institute of Oceanology，Chinese Academy of Sciences Hefei 230026，China，State Key Laboratory of Loess and Quaternary Geology，Institute of Earth Environment，Chinese Academy of Sciences，Xi'an 710054，China，Hefei 230026，China，U.S.，MI48109-1063，Hefei 230026，China，Hefei 230026，China，Guangzhou 510301，China |
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| 基金项目： | FinanciallysupportedjointlybyNKBRSFProjectFunds (G19990 43 40 0 1) ,theInnovation engineeringProjectFundsoftheChineseAcademyofSciences(KZCX2 SW 118) ,theNationalNaturalScienceFoundationofChina (GrantNo .40 1760 3 1)andChineseUniversityofScienceandTechno |
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| 摘 要： | 1IntroductionTostudyglobalchangesinthepast (PAGES) ,i.e.,paleo climaticandpaleoenvironmentalchanges,itisnecessarytoestablishahigh resolutionandhigh precisiontimescale .Lateinthe1 980s,Edwardsetal.( 1 987,1 987)developedthethermalionizationmassspectrometry U seriesdatingmethod (TIMS)andtheyusedthismethodtoconducttheprecisedatingofthecharacteristicclimateeventssincethelastinterglacialperiod .Theirscientificpracticearousedgreatinterestofsci entificworkersengagedinQuaternaryenvironment (Peng…
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| 关 键 词： | 南海 珊瑚虫 全新世 热致电离质谱测定法 雷州半岛 海南岛 地质年代学 古气候 古环境 |
Thermal ionization mass spectrometry (TIMS)-U-Series ages of corals from the South China Sea and holocene high sea level |
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| Zicheng,Peng,Xuexian,He,Xiaozhong,Luo,Jianfeng,He,Guijian,Liu,Baofu,Nie.Thermal ionization mass spectrometry (TIMS)-U-Series ages of corals from the South China Sea and holocene high sea level[J].Chinese Journal of Geochemistry,2003,22(2):133-139. |
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| Authors: | Zicheng Peng Xuexian He Xiaozhong Luo Jianfeng He Guijian Liu Baofu Nie |
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| Institution: | (1) Department of Earth and Space Sciences, University of Science and Technology of China, 230026 Hefei, China;(2) State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, 710054 Xi’ an, China;(3) Department of Geological Sciences, Michigan University, MI48109-1063, USA;(4) South China Sea Institute of Oceanology, Chinese Academy of Sciences, 510301 Guangzhou, China |
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| Abstract: | Coral samples collected from the waters off the Leizhou Peninsula, the Hainan Island and the Yongxing Island of the Xisha
Islands were analyzed by thermal ionization mass spectrometry (TIMS) and multi-collector inductively coupled plasma mass spectrometry
(MC-ICP-MS) for their U-Th systematics. Their uranium contents are mostly lower than 3μg/g, and the δ234U (T) values are within the range of 150 ±5. X-ray diffraction analysis showed that the corals are all composed of aragonite.
This demonstrates that the corals determined have maintained a close system for 7000 years and their skeletons bear much information
about the primitive tropical marine environment. The highly precise age sequence of the corals determined has revealed that
there occurred three phases of high sea level in the South China Sea waters, which are dated at 6799-6307 a B. P., 4472-4285
a B. P. and 1279-1012 a B. P., respectively. The three phases lasted 492 a, 187 a and 267 a, respectively. These three phases
of high sea level are corresponding to the warm environments that had appeared in China during the Megathermal Period and
the Medieval Warm Period in the past ten thousand years.
Financially supported jointly by NKBRSF Project Funds (G19990434001 ), the Innovation-engineering Project Funds of the Chinese
Academy of Sciences (KZCX2-SW-118 ), the National Natural Science Foundation of China (Grant No. 40176031) and Chinese University
of Science and Technology Resource and Environment Research Base Projects. |
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| Keywords: | South China Sea coral mass spectrometry U-series age Holocene high sea level |
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