Preliminary elemental analysis of fossil insects from the Middle Jurassic of Daohugou, Inner Mongolia and its taphonomic implications  

作　　者：WANG Bo LI JianFeng FANG Yan ZHANG HaiChun 

机构地区：[1]State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China [2]Key Laboratory of Marginal Sea Geology, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China [3]Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

出　　处：《Chinese Science Bulletin》2009年第5期783-787,共5页

基　　金：Supported by National Basic Research Program of China (Grant No. 2006CB806400);National Natural Science Foundation of China (Grant Nos. 40872015, 40523004, 40632010);Special Fund for Graduates in the Graduate University of the Chinese Academy of Sciences

摘　　要：Fossil insects from the Middle Jurassic of Daohugou, Inner Mongolia were investigated using Scanning Electron Microscope (SEM) for the first time, and portions and distribution of some elements in com-pression and pyrited fossils were also revealed by X-ray Energy Dispersive Spectroscopy (EDS) at-tached to SEM. Most of compression fossil insects from the Daohugou Biota are preserved in organic remains (diagenetic products of the original organic components). A small part of compression fossils retain a comparatively high Fe concentration which probably resulted from the absorption of Fe by biopolymers during the decaying period. Pyritized insect fossils suggest that the "fossil envelop" model found in the Early Cretaceous Jehol Biota probably also occurs in the Daohugou Biota. Different preservation modes show various mechanisms of fossilization, and also suggest that several different microenvironments are present in Daohugou palaeolakes.Fossil insects from the Middle Jurassic of Daohugou, Inner Mongolia were investigated using Scanning Electron Microscope （SEM） for the first time, and portions and distribution of some elements in compression and pyrited fossils were also revealed by X-ray Energy Dispersive Spectroscopy （EDS） attached to SEM. Most of compression fossil insects from the Daohugou Biota are preserved in organic remains （diagenetic products of the original organic components）. A small part of compression fossils retain a comparatively high Fe concentration which probably resulted from the absorption of Fe by biopolymers during the decaying period. Pyritized insect fossils suggest that the ＂fossil envelop＂ model found in the Early Cretaceous Jehol Biota probably also occurs in the Daohugou Biota. Different preservation modes show various mechanisms of fossilization, and also suggest that several different microenvironments are present in Daohugou palaeolakes.

关 键 词：昆虫化石 内蒙古 中侏罗纪 道虎沟 埋葬学 

分 类 号：Q915[天文地球—古生物学与地层学]