古生代旋回地层学与天文地质年代表

发布时间：2018-02-13 08:07

本文关键词： 地球轨道力米兰科维奇旋回旋回地层学古生代天文年代标尺　出处：《矿物岩石地球化学通报》2017年05期 　论文类型：期刊论文

【摘要】：古生代是显生宙距今最为久远且持续时间最长的"代",发生了多次重大构造、气候和生命演化事件。高精度年代地层格架对于深入理解古生代地球演化历史极为关键。通过识别地层中由地球轨道力引起的米兰科维奇沉积旋回并开展调谐研究,可建立连续的、分辨率达0.02~0.4Ma天文年代标尺,并用于校正国际地质年代表。目前,国际地质年代表的中、新生代部分已基本完成天文年代的校正,但古生代部分尚未开展相关工作。近年来,人们在古生代地层中获得了可靠的、受高精度放射性绝对年龄约束的米兰科维奇旋回证据,并尝试建立天文年代标尺,表明建立古生代天文地质年代表具有良好的远景,是未来旋回地层学研究的前沿。本文简要介绍了旋回地层学的基本理论,系统总结了古生代旋回地层学研究成果及重要进展,并对未来研究提出展望。
[Abstract]:Paleozoic is the oldest and longest lasting "generation" of the Phanerozoic. Climate and life evolution events. High precision chronostratigraphic framework is crucial for understanding the Paleozoic Earth evolution history. By identifying Milankovich sedimentary cycles caused by Earth orbital forces in the strata and conducting tuning studies, A continuous astronomical age scale with a resolution of 0.02 ~ 0. 4 Ma can be established and used to correct the representative of the international geological year. At present, the Mesozoic and Cenozoic parts of the representative of the International Geological year have basically completed the correction of the astronomical age. But the Paleozoic part has not been done. In recent years, reliable Milankovich cycle evidence has been obtained in Paleozoic strata, constrained by the absolute age of high precision radioactivity, and attempts have been made to establish astronomical age scales. It is indicated that the establishment of the representative of the Paleozoic astronomical geological years has a good prospect and is the frontier of the future cyclic stratigraphy. This paper briefly introduces the basic theory of cyclic stratigraphy and systematically summarizes the achievements and important progress of the paleozoic cycle stratigraphy research. The prospect of future research is put forward.
【作者单位】：中国地质大学(北京)生物地质与环境地质国家重点实验室;中国地质大学(北京)海洋学院;
【基金】：国家自然科学基金项目(41422202,41576062,41688103) 中央高校基本科研业务费专项资金项目(2652015297,2652015162)
【分类号】：P53

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