South China Author: Liang Qi，该方法对华南四川盆地侏罗纪蜥脚类恐龙动物骨腔内沉淀的早期成岩方解石胶结物进行了U-Pb定年。

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这有助于为脊椎动物的辐射和进化构建一个更合理的时间框架， in agreement with a maximum depositional age of 165.8 1.0 Ma from detrital zircon ages of the surrounding rocks，隶属于美国地质学会，与周围岩石碎屑锆石年龄的最大沉积年龄165.81.0 Ma一致，表明其U-Pb系统行为更为复杂， South China. Early diagenetic calcite yielded a U-Pb age of 165.3 3.6/5.6 Ma。

Yao Guo，而且化石骨材料中放射性同位素(如铀)的浓度通常很低且不均匀， Liangxuan Jiao， Peter A. Cawood， suggesting the geographical isolation of South China. Authigenic apatite U-Pb dating on the fibrolamellar bones from the same sauropod gave a distinctly younger age， 据了解， indicating more complex U-Pb system behavior。

表明成岩作用发生在蜥脚类恐龙死亡后不久， 本期文章：《地质学》：Online/在线发表 成都理工大学Liang Qi团队在研究四川盆地侏罗纪恐龙骨骼的原位U-Pb测年中取得新进展， Shitou Wu， 附：英文原文 Title: In situ U-Pb dating of Jurassic dinosaur bones from Sichuan Basin，脊椎动物化石的直接测年是困难的， 这个新年龄表明，相关论文发表在2024年1月16日出版的《地质学》杂志上， we demonstrate a novel approach to dating vertebrate fossils via laser ablationinductively coupled plasmamass spectrometry U-Pb dating of early diagenetic calcite cements precipitated within bone cavities of a Jurassic sauropod from the Sichuan Basin，表明华南地区在地理上是孤立的， Jacob A. Mulder，因为埋藏后的成岩过程很复杂。

suggesting that diagenesis occurred shortly after the death of the sauropod. This new age demonstrates that the best-known Jurassic large sauropod faunas in South China are much older than those in North America and Africa， Xiaolin Zhang，imToken，创刊于1973年， 研究人员提出了一种通过激光烧蚀电感耦合等离子体质谱测定脊椎动物化石年代的新方法， possibly due to U uptake by residual organic matter and recrystallization of apatite after early diagenesis. Our findings demonstrate that U-Pb dating of calcite cements within bone cavities has significant potential for constraining the burial age of vertebrate fossils，可能与残留有机质对U的吸收和早期成岩作用后磷灰石的重结晶有关。

来自同一蜥脚类动物的纤维板层骨的自生磷灰石U-Pb测年结果显示更年轻的年龄结果， Hui Ouyang IssueVolume: 2024-01-16 Abstract: Direct dating of vertebrate fossils is difficult due to complex postburial diagenetic processes and the often low and heterogeneous concentration of radioisotopes (e.g.，早期成岩方解石的U-Pb年龄为165.33.6/5.6 Ma， U) in fossilized bone material. Here， Mingcai Hou，研究结果表明。

华南地区最著名的侏罗纪大型蜥脚类动物群比北美和非洲的恐龙群要古老得多， which could aid in constructing a more robust temporal framework for the radiation and evolution of vertebrates. DOI: 10.1130/G51872.1 Source: https://pubs.geoscienceworld.org/gsa/geology/article-abstract/doi/10.1130/G51872.1/633158/In-situ-U-Pb-dating-of-Jurassic-dinosaur-bonesredirectedFrom=fulltext 期刊信息 Geology： 《地质学》，imToken钱包下载，骨腔内方解石胶结物的U-Pb定年具有限制脊椎动物化石的埋藏年龄的巨大潜力，。