| 华南下/中奥陶统界线附近笔石相的分异与全球下/中奥陶统界线生物标志的选择 |
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| 引用本文： | 王传尚,汪啸风,陈孝红,李志宏.华南下/中奥陶统界线附近笔石相的分异与全球下/中奥陶统界线生物标志的选择[J].现代地质,2004,18(1):89-95. |
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| 作者姓名： | 王传尚 汪啸风 陈孝红 李志宏 |
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| 作者单位： | 1. 中国地质大学,地球科学学院,湖北,武汉,430074;中国地质调查局,宜昌地质矿产研究所,湖北,宜昌,443003
2. 中国地质调查局,宜昌地质矿产研究所,湖北,宜昌,443003 |
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| 基金项目： | 国家自然科学基金项目(40272020)，中国地质调查局地质调查项目(200113900072)。 |
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| 摘 要： | 通过对宜昌黄花场(扬子地台中部)大湾组剖面和重庆城口(扬子地台北部)的湄潭组剖面笔石动物群特征的分析,结合江西崇义地区(盆地相)、江南过渡带笔石动物群的研究成果,讨论了华南下/中奥陶统界线附近笔石相分异的现象,并探讨了下/中奥陶统界线附近笔石动物和牙形石的相互关系。认为宜昌黄花场剖面完全具备建立全球下/中奥陶统界线层型剖面和点(GSSP)的条件,牙形石B.triangularis的首次出现(FAD)是良好的界线生物标志。
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| 关 键 词： | 笔石 下/中奥陶统界线 大湾组 湄潭组 黄花场 华南 |
| 文章编号： | 1000-8527(2004)01-0089-07 |
| 修稿时间： | 2003年4月6日 |
THE DIFFERENTIATION OF GRAPTOLITE BIOFACIES ACROSS THE LOWER/MIDDLE ORDOVICIAN BOUNDARY IN SOUTH CHINA AND THE SELECTION OF BIO- MARKER FOR GLOBAL LOWER/MIDDLE ORDOVICIAN BOUNDARY |
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| WANG Chuan-shang.THE DIFFERENTIATION OF GRAPTOLITE BIOFACIES ACROSS THE LOWER/MIDDLE ORDOVICIAN BOUNDARY IN SOUTH CHINA AND THE SELECTION OF BIO- MARKER FOR GLOBAL LOWER/MIDDLE ORDOVICIAN BOUNDARY[J].Geoscience——Journal of Graduate School,China University of Geosciences,2004,18(1):89-95. |
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| Authors: | WANG Chuan-shang |
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| Institution: | WANG Chuan-shang~ |
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| Abstract: | Based on analyzing the characteristics of the graptolite faunas from the Dawan Formation at Huanghuachang section, Yichang(central Yangtze Platform) and the Meitan Formation at Chengkou section, Chongqing(northern Yangtze Platform), respectively, combining with the results from Chongyi area, Jiangxi(basin facies) and Jiangnan transitional belt,the authors discussed the correlation between graptolite and conodont fauna as well as the differentiation of graptolite biofacies at the Lower/Middle Ordovician boundary interval in South China. Consequently, the authors consider that the Huanghuachang section fulfills the requirements for a GSSP and the FAD of conodont Baltoniodus triangularis is a good proxy for the base of Middle Ordovician. |
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| Keywords: | graptolite Lower/Middle Ordovician boundary the Dawan Formation the Meitan Formation Huanghuachang South China |
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