期刊
JOURNAL OF ASIAN EARTH SCIENCES
卷 62, 期 -, 页码 654-661出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jseaes.2012.11.015
关键词
SIMS U-Pb zircon geochronology; Late Cretaceous; Dinosaur eggs; Tiantai basin; China
资金
- National Natural Science Foundation of China [40772017, 40825005, 41172018, 90714010, 40821091, 40925012]
- National Key Basic Research Program of China (973 Program) [2012CB821900]
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.
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