| 生物化石显微结构扫描电镜观察 |
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| 引用本文： | 代永定,陈丽华,周文宝.生物化石显微结构扫描电镜观察[J].地质科学,1985,0(3):283-289. |
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| 作者姓名： | 代永定 陈丽华 周文宝 |
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| 作者单位： | 1. 中国科学院地质研究所;2. 石油勘探开发科学研究院 |
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| 摘 要： | 研究生物化石显微结构是为了正确鉴定和区分古生物化石,探索古生物之间的相互关系。沉积岩中含有大量的生物化石及其碎片,要在扫描电镜样品中鉴定它们,就必须确定其显微结构。作者在大量的偏光显微镜观察的基础上,用扫描电镜对近100个样品的生物化石或现代硬体的显微结构进行更深入的观察。
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| 关 键 词： | , |
| 收稿时间： | 1983-07-23 |
| 修稿时间： | 1983-07-23; |
SEM OBSERVATIONS ON SKELETAL MICROSTRUCTURE |
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| Dai Yongding,Chen Lihua,Zhou Wenbao.SEM OBSERVATIONS ON SKELETAL MICROSTRUCTURE[J].Chinese Journal of Geology,1985,0(3):283-289. |
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| Authors: | Dai Yongding Chen Lihua Zhou Wenbao |
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| Institution: | 1. Institute of Geology, Academia Sinica, Beijing;2. Scientific Research Institute of Petroleum Exploration and Development, Beijing |
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| Abstract: | On the basis of SEM observative results of about 100 samples, the authors describe the SEM charaeterisities of 15 kinds of skeletal mierostructure including caleitic cryp-to-micrograined, crystograined, monocrystal, sheet-fibreus, prismato-fibrous, hyalo-fibro-us, prismatic foliated, aragonitic prismato-fibrous, prismato-sheet-fibrous, crossed, nacreous, apatitic sheet fibrous, foliated fibrous and chalcedony fibrous inicrostructures.The SEM characteristics of skeletal mierostrueture are generally similar to PM ones. There are only a few exceptions in which the sheet fibrous, prismato-fibrous and hyalo-fibrous microstructures composited by calcite are made up of uniform mierograin aligned in stria, normal to shell surface. The cause could be that the calcite is susceptible to etching.Because of different etching-resistant degree, the convexity of various microstrueture elements is also different. It depends on the mineral composition, grain size and organic matrix. The order of the etching-resistance is: siliceous fibrous, phosphoric (foliated fibrous to sheet, fibrous), calcareous (aragonite to calcite). Among the calcareous textural elements, the order is monocrystal, prismatic, crysto-grained, nacreous, crossed (lamellar to fibrous), foliated (lamellar to fibrous), aragonite (prismo-sheet-fi-brous, prismo-fibrous), calcite (prismo-fibrous, sheet fibrous, hyalo-fibrous), crypto-inicrogramed. |
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| Keywords: | , |
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