Preliminary elemental analysis of fossil insects from the Middle Jurassic of Daohugou, Inner Mongolia and its taphonomic implications
Preliminary elemental analysis of fossil insects from the Middle Jurassic of Daohugou, Inner Mongolia and its taphonomic implications
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DOI：
10.1007/s11434-008-0561-5
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发表时间：
2009-03-01
影响因子：
--
通讯作者：
Zhang HaiChun
中科院分区：
文献类型：
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作者：
Wang Bo;Li JianFeng;Zhang HaiChun
首次利用扫描电子显微镜（SEM）对内蒙古道虎沟中侏罗世昆虫化石进行了研究，并通过扫描电子显微镜附带的X射线能谱仪（EDS）揭示了压缩化石和黄铁矿化石中部分元素的成分和分布。道虎沟生物群的压缩昆虫化石大部分保存在有机遗骸（原始有机成分的成岩产物）中。一小部分压缩化石保留了较高的铁浓度，这可能是由于腐烂期间生物聚合物吸收铁的结果。黄铁矿昆虫化石表明，在早白垩世热河生物群中发现的“化石包膜”模型很可能也出现在道虎沟生物群中。不同的保存模式显示出不同的化石形成机制，也表明道虎沟古湖泊存在多种不同的微环境。
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.