| 山东沭河裂谷带早白垩世晚期恐龙足迹群与古地理背景* |
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| 引用本文： | 旷红伟,柳永清,吴清资,程光锁,许克民,刘海,彭楠,许欢,陈军,王宝红,徐加林,汪明伟,章朋.山东沭河裂谷带早白垩世晚期恐龙足迹群与古地理背景*[J].古地理学报,2013,15(4):435-453. |
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| 作者姓名： | 旷红伟 柳永清 吴清资 程光锁 许克民 刘海 彭楠 许欢 陈军 王宝红 徐加林 汪明伟 章朋 |
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| 作者单位： | 1.中国地质科学院地质研究所，北京 100037;2.山东省第八地质矿产勘查院，山东日照 276800;3.山东省地质科学实验研究院，山东济南 250000;4.山东省地质调查研究院，山东济南 250000;5.长江大学地球物理与石油资源学院，湖北荆州 434023;6.中国地质大学(北京）地球科学与资源学院，北京 100083;7.长江大学地球科学学院，湖北荆州 434023 |
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| 基金项目： | 国家自然科学基金重点项目(编号:90914003)、国家自然科学基金面上项目(编号:41272021);中国地质科学院地质研究所基本业务费项目(编号:J1106);中国地质调查局项目(编号:1212011085477,1212011120105,12120113096500)共同资助 |
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| 摘 要： | 山东沭河裂谷带由北至南发育8个早白垩世晚期(大盛期）的恐龙足迹群化石点，其中5处为本研究首次报道。沭河裂谷带足迹化石点多，分布广，层位多，足迹数量和造迹恐龙种类丰富。郯城新发现的单个蜥脚类巨型足迹直径近1.0m，可能仅次于前人描述过的兰州西南盐锅峡下白垩统河口群内中国最大的蜥脚类足迹化石。沭河裂谷带的恐龙足迹产出于大盛群田家楼组，地质年代为110～100Ma，属于早白垩世晚期Aptian晚期—Albian期。恐龙足迹一般为凹形印痕，造迹者以蜥脚类恐龙为主，其次为鸟脚类和兽脚类。足迹多保存在发育波痕、泥裂、雨痕等沉积构造的细砂—粉砂岩沉积物层面。足迹和行迹特征显示造迹恐龙为群居和在栖息地漫步行走状态。足迹原位保存特征及赋存地层沉积学研究表明，早白垩世中晚期气候处于由温暖潮湿变得炎热干旱的过渡期，湖泊、三角洲广布，恐龙栖息于湖滨环境。沭河裂谷带早白垩世晚期恐龙足迹群的发现和综合研究进一步证实，中国早白垩世恐龙动物群有着更广阔的地理分布和相似的古地理环境。
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| 关 键 词： | 沭河裂谷带 早白垩世 大盛群 恐龙足迹 古地理 |
| 收稿时间： | 31 December 2012 |
Dinosaur track sites and palaeogeography of the late Early Cretaceous in Shuhe Rifting Zone of Shandong Province |
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| Kuang Hongwei,Liu Yongqing,Wu Qingzi,Cheng Guangsuo,Xu Kemin,Liu Hai,Peng Nan,Xu Huan,Chen Jun,Wang Baohong,Xu Jialin,Wang Mingwei,Zhang Peng.Dinosaur track sites and palaeogeography of the late Early Cretaceous in Shuhe Rifting Zone of Shandong Province[J].Journal of Palaeogeography,2013,15(4):435-453. |
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| Authors: | Kuang Hongwei Liu Yongqing Wu Qingzi Cheng Guangsuo Xu Kemin Liu Hai Peng Nan Xu Huan Chen Jun Wang Baohong Xu Jialin Wang Mingwei Zhang Peng |
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| Institution: | 1,6 1 Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037 2 The No. 8 Exploration Institute of Geology and Mineral Resources,Rizhao 276800,Shandong 3 Shandong Institute and Laboratory of Geological Sciences,Jinan 250000,Shandong 4 Shandong Institute of Geology Survey,Jinan 250000,Shandong 5 School of Geophysics and Resources of Yangtze University,Jingzhou 434023,Hubei 6 School of the Earth Sciences and Natural Resources,China University of Geosciences ( Beijing) ,Beijing 100083 7 School of Geosciences of Yangtze University,Jingzhou 434023,Hubei |
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| Abstract: | Eight dinosaur track sites in the upper Lower Cretaceous(Dasheng Group)were found along the 300 km- long northeast-trending Shuhe Rifting Zone in the south-central Shandong Province according to the recent field investigations. Five track sites among them were newly discovered. Especially，the huge sauropod footprints with the diameter about 1.0m in Tancheng，may be the second to the biggest sauropod footprints from Yanguoxia，Gansu，China.The footprints were marked in the Tianjialou Formation of Dasheng Group during the maximum flooding period，about 110-100Ma(Aptian-Albian).The footprints were mostly concave, mainly from sauropod，secondly from theropod and ornithopod.Most dinosaurs meandered slowly. Generally, footprints existed in the fine sandstone and siltstone，always accompanied by ripples，mud cracks and rain prints.The in-situ preservation of footprints and the sedimentary characteristics showed that dinosaurs lived in the lake shore environments where would be the better preservation sites for footprints.The climate at the late Early Cretaceous in this area were from warm humid to hot arid. Comparing with other preservation environment in the same period，it proved that dinosaur faunas had distributed in an even wider area with similar palaeogeography in the Early Cretaceous. |
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| Keywords: | Shuhe Rifting Zone Early Cretaceous Dasheng Group dinosaur footprint palaeogeography |
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