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引用本文:黄乐清,唐鹰,童潜明,黄建中,李光,胡能勇. 株洲天元白垩纪含化石层地质记录及恐龙死亡、埋藏过程初探[J]. 中国地质, 2018, 45(5): 1023-1038.
HUANG Leqing,TANG Ying,TONG Qianming,HUANG Jianzhong,LI Guang,HU Nengyong. Geological records of fossils layer and death process and taphonomy of dinosaurs in Cretaceous in Tianyuan, Zhuzhou[J]. Geology in China, 2018, 45(5): 1023-1038(in Chinese with English abstract).
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株洲天元白垩纪含化石层地质记录及恐龙死亡、埋藏过程初探
黄乐清1, 唐鹰2, 童潜明3, 黄建中1, 李光2, 胡能勇2
1.湖南省地质调查院, 湖南 长沙 410116;2.湖南省地质博物馆, 湖南 长沙 410004;3.湖南省地质研究所, 湖南 长沙 410007
摘要:
株洲天元恐龙化石遗迹区,是湖南省新发现的一个恐龙化石产地,亦是当今世界上为数不多的位于大中城市中心的恐龙化石埋藏地之一。本文在区域资料的基础上,首次在上白垩统含化石层段中识别出暴露地质记录、洪水记录及震积记录等3个特殊的地质体;同时,通过大量砾石的科学统计,明确了株洲天元湖盆的古流向为自南往北,进而指出恐龙生活在呈NE-SW向展布的株洲湖盆南岸。在上述研究基础上,本文推测:在气候干旱少雨、植被稀少的古环境中,火山(?)、地震、滑坡、洪积等一系列局部性突发的地质事件直接导致了株洲天元地区生态环境的恶化,这亦成为该区恐龙死亡的主导因素。其骨骼埋藏与河道冲积入湖形成三角洲沉积体系这一过程密切相关。
关键词:  株洲天元  晚白垩世  恐龙化石  地质记录  埋藏相
DOI:10.12029/gc20180510
分类号:Q915.2+3
基金项目:湖南省自然科学基金项目(2017JJ3139)、国家自然科学基金项目(41502011)与株洲天元恐龙化石调查项目(JYDY-ZZ1504078)联合资助。
Geological records of fossils layer and death process and taphonomy of dinosaurs in Cretaceous in Tianyuan, Zhuzhou
HUANG Leqing1, TANG Ying2, TONG Qianming3, HUANG Jianzhong1, LI Guang2, HU Nengyong2
1.Hunan Institute of Geological Survey, Changsha 410116, Hunan, China;2.Hunan Museum of Geology, Changsha 410004, Hunan, China;3.Hunan Academy of Geological Sciences, Changsha 410007, Hunan, China
Abstract:
Based on the study of regional geological data, the authors recognized 3 sedimentary events in the Upper Cretaceous formation for the first time, with the 3 geological records being exposure geological record, flood geological record and earthquake geological record. In addition, on the basis of lots of scientific statistics of gravels, the authors discussed the paleocurrent direction as well as provenance of the lake basins in Tianyuan of Zhuzhou systematically. The authors found that dinosaurs lived on the west bank of a long narrow NE-SW distributed lake in the south part of the Zhuzhou lake basin. Based on the results obtained, the authors infer that local volcano (?), earthquake, landslide and pluvial events are the reasons for paleocimate change and animals' death as well as the main reasons for the death of dinosaurs in the palaeoenvironment with dry weather and scarce forest vegetation. The burial process was closely related to the delta deposit system from channel alluvial.
Key words:  Zhuzhou  Tianyuan  Late Cretaceous  dinosaur  geological record  taphonomy