| 山东郯城和江苏东海早白垩世晚期恐龙足迹化石新发现及古环境* |
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| 引用本文： | 汪明伟,旷红伟,柳永清,彭楠,刘海,吴清资,徐加林,陈军,许欢.山东郯城和江苏东海早白垩世晚期恐龙足迹化石新发现及古环境*[J].古地理学报,2013,15(4):489-504. |
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| 作者姓名： | 汪明伟 旷红伟 柳永清 彭楠 刘海 吴清资 徐加林 陈军 许欢 |
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| 作者单位： | 1.长江大学地球科学学院，湖北荆州 434023;2.中国地质科学院地质研究所，北京 100037;3.中国地质大学(北京）地球科学与资源学院，北京 100083;4.长江大学地球物理与石油资源学院，湖北荆州 434023;5.山东省第八地质矿产勘查院，山东日照 276800 |
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| 基金项目： | 国家自然科学基金重点项目，国家自然科学基金面上项目，中国地质科学院地质研究所基本业务费项目，中国地质调查局项目 |
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| 摘 要： | 首次在山东郯城早白垩世晚期地层中发现恐龙足迹化石，分属蜥脚类和兽脚类恐龙足迹，足迹大小差异较大。通过对山东省郯城县新发现的2处恐龙足迹化石点和江苏省东海县南古寨恐龙足迹化石点的对比研究，探讨了足迹类型、大小、速度与足迹深度的关系，发现同等条件下，蜥脚类恐龙足迹通常较兽脚类足迹深，而蜥脚类恐龙足迹深度随着足迹大小的增加有变深的趋势；波痕、雨痕和泥裂等沉积构造以及足迹回填和叠覆现象对足迹化石保存形态和细节有较大影响，而构造变形对足迹形态和行迹并无明显影响，但高角度的构造变形会加速差异风化，使足迹化石更易暴露而被破坏。对研究区古环境与古生态的研究表明，早白垩世晚期研究区经历了水体逐渐变浅、气候由湿到干并伴随短暂间歇性干旱的过程，沉积环境由河湖演变为三角洲前缘、并逐渐过渡到三角洲平原，生态环境逐渐恶化，动植物由兴而衰、逐渐减少。
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| 关 键 词： | 山东郯城 江苏东海 早白垩世 恐龙足迹 古环境 |
| 收稿时间： | 26 February 2013 |
New discovery of dinosaur footprint fossils and palaeoenvironment in the late Early Cretaceous at Tancheng County,Shandong Province and Donghai County, Jiangsu Province |
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| Wang Mingwei,Kuang Hongwei,Liu Yongqing,Peng Nan,Liu Hai,Wu Qingzi,Xu Jialin,Chen Jun,Xu Huan,Wang Baohong,Zhang Peng.New discovery of dinosaur footprint fossils and palaeoenvironment in the late Early Cretaceous at Tancheng County,Shandong Province and Donghai County, Jiangsu Province[J].Journal of Palaeogeography,2013,15(4):489-504. |
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| Authors: | Wang Mingwei Kuang Hongwei Liu Yongqing Peng Nan Liu Hai Wu Qingzi Xu Jialin Chen Jun Xu Huan Wang Baohong Zhang Peng |
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| Institution: | 1.School of Geosciences of Yangtze University，Jingzhou 434023，Hubei;2.Institute of Geology，Chinese Academy of Geological Sciences，Beijing 100037;3.School of the Earth Sciences and Natural Resources，China University of Geosciences(Beijing），Beijing 100083;4.School of Geophysics and Resources of Yangtze University，Jingzhou 434023，Hubei;5.The No.8 Exploration of Geology and Mineral Resources，Rizhao 276800，Shandong |
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| Abstract: | Lots of dinosaur footprints belonging to sauropod and theropod were first discovered in the upper Lower Cretaceous in Tancheng County，Shandong Province.The footprints vary in size. By comparing the study between the two new dinosaur track sites in Tancheng of Shandong Province and Nanguzhai of Jiangsu Province，we discussed the relationship among the footprint types，size， depth and walking speed，and found that under the same conditions，sauropod footprints are always deeper than those of theropod，while with the increase of the footprint size of sauropod，the depth shows a shallowing trend;sedimentary structures like ripples，rain marks and mud cracks，and footprint backfilling and overlaying have relatively greater impacts on saved forms and details，while structural deformation has no obvious effect on footprint forms and tracks，but high angle deformation would increase the differential weathering，making the fossils easier to be exposed and be destroyed.The study on palaeoenvironment and palaeoecology shows that the study area experienced a process of water gradually shallowing and climate changing from humid to dry with short intermittent drought，sedimentary facies evolved from fluvio lacustrine to delta front，and gradually to delta plain，and the palaeo ecological environment gradually deteriorated，the fauna and flora declined and the amount gradually decreased. |
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| Keywords: | Tancheng County of Shandong Province Donghai County of Jiangsu Province Early Cretaceous dinosaur footprints Palaeoenvironment |
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