| 地磁极性年表的发展回顾 |
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| 引用本文： | 肖国桥,詹涛,葛俊逸.地磁极性年表的发展回顾[J].地球科学进展,2010,25(4):365-373. |
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| 作者姓名： | 肖国桥 詹涛 葛俊逸 |
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| 作者单位： | 1. 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,陕西西安710075;中国科学院研究生院,北京100049
2. 中国科学院研究生院,北京100049;中国科学院地质与地球物理研究所,北京100029 |
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| 基金项目： | 国家自然科学基金重点项目，中国科学院知识创新工程重要方向项目 |
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| 摘 要： | 磁性地层研究是对新生代乃至中生代沉积序列定年的重要方法之一。地磁极性年表作为磁性地层定年的标准,其精度对地层学、古生物学、古气候学等领域的研究有重要影响。回顾了地磁极性年表的发展历史,并着重介绍了当前天文极性年表的发展现状。按照地磁极性年表不同时期的发展特点,可将其发展大致归纳为3个阶段:①早期阶段:20世纪60年代末,主要基于火山岩剩磁测量和K/Ar测年建立了最近约5Ma以来的地磁极性年表;②中期阶段:20世纪60年代末到90年代初,基于大量海底磁异常条带相对宽度建立了中中生代以来完整的地磁极性年表;③现今阶段:20世纪90年代以来,基于天文学和古气候学研究对极性界限的轨道调谐,正在构建高精度的天文极性年表。在天文学和古气候学发展的推动下,高精度的天文极性年表有望取代传统的CK95年表而被广泛应用并促进相关领域的发展。
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| 关 键 词： | 磁性地层学 米兰科维奇理论 轨道调谐 地磁极性年表 天文极性年表 |
Development of the Geomagnetical Polarity Time Scale:A Review |
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| XIAO Guoqiao,ZHAN Tao,GE Junyi.Development of the Geomagnetical Polarity Time Scale:A Review[J].Advance in Earth Sciences,2010,25(4):365-373. |
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| Authors: | XIAO Guoqiao ZHAN Tao GE Junyi |
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| Institution: | 1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences,Xi′an 710075, China; 2.Graduate University of the Chinese Academy of Sciences, Beijing 100049, China; 3.Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | For Middle Mesozoic to Quaternary times,the geomagnetic polarity record is central to the construc- tion of geologic time scales.The precision of the standard geomagnetical polarity time scale(GPTS)strongly influ- ences the development of related disciplines,such as stratigraphy,paleontology,paleoclimatology and so on.We review the history of the developments in GPTS,and mainly present the recent progress in calibration of the astro-nomical polarity time scale(APTS),as well the shortages of the present APTS.It Can be divided into three stages according to the characteristics of the GPTS development:(1) early stage,during the 1960s,is characterized by K/Ar dating and measuring the magnetization of igneous rocks,constructed the recent 5 Ma GPTS;(2) middle stage.from late 1960s to early 1990s,is characterized by analysis of marine magnetic profiles from the world's o-cean basins.constructed the integrated GPTS since Middle Mesozoic;and (3) in the last three decades,with the developmenIs of the Milankovitch theory (astronomical climate theory) and the astronomical calculation of the Earth's orbit.the geological time scale can be constructed by orbital tuning,which have being successfully devel- oped as a powerful geochronometer in calibration the APTS.The precise APTS is expected to replace the CK95 Girls and will be widely used in related disciplines. |
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| Keywords: | Magnetostratigraphy Milankovitch theory Orbital tuning Geomagnetic polarity time scale Astronomical polarity time scale |
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