岩矿测试2017，Vol.36Issue(4)：340-349,10.DOI:10.15898/j.cnki.11-2131/td.201705230086
安徽齐云山晚白垩世恐龙蛋矿物和元素组成及古环境分析
Mineral and Elemental Composition of Late Cretaceous Dinosaur Eggs in Qiyunshan Area, Anhui Province and Its Implication for Palaeoenvironmental Analysis
摘要
Abstract
The well-preserved dinosaur egg fossilsrecently found in Qiyunshan area, Anhui Province are the key to studying the living environment and the extinction of dinosaur fauna in the Late Cretaceous period.In order to discuss the palaeoenvironment and palaeoclimate, X-ray Diffraction (XRD), Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES), and Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) were used to analyze the composition of macro minerals, major elements and trace elements of the dinosaur eggshells, egg core and the surrounding rock.The results show that the main minerals of dinosaur eggshells are calcite and quartz whereas the mineral of the interior is the same as the exterior of the eggshell and is mainly quartz.Major elements include Ca, Na, Mg, K, Al, Fe, whereas trace elements include Sr, Zn, Ba, As, Ti, V, Cr, Co, Ni, Cu, Mn, Pb, La, U, Ir.The average content of Sr in the eggshells was 6199.3×10-6, higher than most of the eggshells from Xixia of Henan province and Nanxiong of Guangdong province.The average content of Ir in the eggshells was 59.6×10-12.Sr and Ir show an obvious abnormality compared with the background values, which may be caused by absorption of harmful elements during material exchange between dinosaur body and the outside world.The accumulation of As, Mn, and Pb and the lack of Zn may lead to the poisoning of dinosaurs and then extinction.The increased Fe content in the surrounding rock indicates that the palaeoclimate in Qiyunshan area during the Late Cretaceous was dry and hot, and the content of Ir, which has a positive correlation with Fe, increased with the increase of Fe.Moreover, the closer to the Cretaceous-Paleogene (K/T) boundary, the higher is the content of Sr and Ir in the surrounding rock, which may be one of the reasons for the extinction of the dinosaur fauna in the area.This conclusion provides a basis for the study of the living environment of the dinosaur fauna in Qiyunshan area.关键词
恐龙蛋/矿物组成/元素组成/晚白垩世/齐云山地区Key words
dinosaur eggs/mineral composition/elemental composition/Late Cretaceous/Qiyunshan area分类
生物科学引用本文复制引用
姜琴,何情,郑刘根,胡毅..安徽齐云山晚白垩世恐龙蛋矿物和元素组成及古环境分析[J].岩矿测试,2017,36(4):340-349,10.基金项目
安徽省自然科学基金资助项目(1708085QD86) （1708085QD86）
安徽大学博士科研启动经费项目(J10113190092) （J10113190092）
