SIMS zircon U-Pb dating of the Late Cretaceous dinosaur egg-bearing red deposits in the Tiantai Basin, southeastern China
SIMS zircon U-Pb dating of the Late Cretaceous dinosaur egg-bearing red deposits in the Tiantai Basin, southeastern China
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天台盆地晚白垩世恐龙蛋红矿床SIMS锆石U-Pb定年
DOI：
10.1016/j.jseaes.2012.11.015
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发表时间：
2013-01-30
影响因子：
3
通讯作者：
Zhu, Rixiang
中科院分区：
文献类型：
--
作者：
He, Huaiyu;Wang, Xiaolin;Zhu, Rixiang
我国恐龙蛋或恐龙碎片数量丰富，分布广泛。在其它化石相对缺乏的陆相地层中，它们对生物地层的划分和对比具有重要的参考价值。尽管在中国北方和南方的中、晚白垩世发现了大量脊椎动物化石，特别是恐龙蛋和骨骼化石，但对含脊椎动物的陆栖沉积物的时代几乎没有直接的证据。本文对浙江天台盆地晚白垩世陆相红色矿床赖家组和赤城山组中与恐龙蛋沉积物互层的凝灰岩进行了西姆斯U-Pb年龄测定。赖家组和赤城山组的西姆斯锆石U-Pb年龄分别为96-99 Ma（Cenomanian）和91-94 Ma（Turonian），为晚白垩世脊椎动物和恐龙蛋的演化提供了直接的时间约束，并为与中国南北北方其它地区的白垩纪陆相沉积对比提供了依据。(C)2012爱思唯尔有限公司保留所有权利。
Dinosaur eggs or fragments are abundant and extensively distributed in China. They can be very informative in biostratigraphic division and correlation of continental strata where other fossils are relatively lacking. Despite remarkable discoveries of vertebrate fossils, particularly dinosaur eggs and skeletons from the middle and Late Cretaceous of both northern and southern China, there is hardly any direct evidence for the ages of the vertebrate-bearing terrestrial deposits. To constrain their depositional ages, here we have obtained SIMS U-Pb zircon ages from the tuffs interbedded with dinosaur egg-bearing sediments from the Laijia and Chichengshan formations of the terrestrial red deposits of the Late Cretaceous in the Tiantai Basin, Zhejiang Province, southeastern China. The SIMS zircon U-Pb ages from the Laijia and Chichengshan formations are about 96-99 Ma (Cenomanian) and 91-94 Ma (Turonian), respectively, providing direct time constraints on the vertebrate and dinosaur egg evolution in the Late Cretaceous as well as a basis for correlation with terrestrial Cretaceous deposits in other regions of southern and northern China. (C) 2012 Elsevier Ltd. All rights reserved.