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| 重庆云阳新津乡中侏罗统新田沟组恐龙的发现及沉积环境 |
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周羽漩1,2, 胡海虔1,3,4, 代辉1, 谭超1,2, 杨文光2, 张洪亮5
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1.重庆市地质矿产开发局208 水文地质工程地质队/重庆市地质遗迹保护与研究实验室, 重庆 400700;2.成都理工大学沉积地质研究院, 四川 成都 610059;3.中国科学院古脊椎动物与古人类研究所/中国科学院脊椎动物演化与人类起源重点实验室, 北京 100044;4.中国科学院大学, 北京 100049;5.成都理工大学地球科学学院, 四川 成都 610059
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| 摘要: |
| 在重庆市云阳县新津乡中侏罗统新田沟组中发现了大量恐龙化石，且恐龙化石产出层位呈现出与双壳类、鱼类、龟鳖类和蛇颈龙类化石整体混杂埋藏的特征，这是新田沟组中首次发现。通过野外实测剖面、岩石特征、沉积构造、古生物特征、粒度特征，初步判定研究区新田沟组为滨-浅湖亚相沉积，局部为洪泛亚相。重庆地区新田沟组古生物化石组合的首次发现为四川盆地中生代古生物化石及其古环境的研究提供了更多依据。 |
| 关键词: 重庆 中侏罗统 新田沟组 恐龙 沉积环境 |
| DOI： |
| 分类号:P534.52;Q91 |
| 基金项目:重庆市规划和自然资源局项目《重庆市云阳县普安乡恐龙化石保护与研究》（编号：KJ-2018035）、重庆市自然科学基金项目《重庆市云阳中侏罗统新田沟组兽脚类恐龙材料形态学和埋藏学研究》（编号：cstc2018jcyjAX0435）和重庆市博士后科研项目《重庆市合川马门溪龙类新材料形态学和埋藏学研究》（编号：Xm2017069） |
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| The discovery of dinosaurs from the Middle Jurassic Xintiangou Formation in Xinjin Township Yunyang Chongqing and its sedimentary environment |
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ZHOU Yuxuan1,2, HU Haiqian1,3,4, DAI Hui1, TAN Chao1,2, YANG Wenguang2, ZHANG Hongliang5
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1.Chongqing Geological Relic Protection and Research Laboratory/208 Hydrogeological Engineering Geological Party, Chongqing Geology and Mineral Development Bureau, Chongqing 400700, China;2.Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu 610059, Sichuan, China;3.Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences/Institute of Vertebrate, Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China;4.University of Chinese Academy of Sciences, Beijing 100049, China;5.School of Earth Science, Chengdu University of Technology, Chengdu 610059, Sichuan, China
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| Abstract: |
| Recently,a large number of dinosaur fossils were found in the Middle Jurassic Xintiangou Formation in Xinjin Township,Yunyang County,Chongqing,and the dinosaur fossils were intermixed with fishes,turtles,plesiosaurs and bivalves.This is the first discovery in the Xintiangou Formation.The Xintiangou Formation in the study area is preliminarily determined to be a littoral-shallow lake subfacies and partly a flood-pan subfacies,as shown by field measured section,rock features,sedimentary structure,paleontological features and grain size characteristics.The discovery of the fossil assemblage of Xintiangou Formation in Chongqing area provides more evidence for the study of Mesozoic fossil and paleoenvironment in the Sichuan basin. |
| Key words: Chongqing Middle Jurassic Xintiangou Formation dinosaur sedimentary environment |