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| 一条新发现的奥陶系—志留系界线剖面 | |
| 引用本文： | 苏文博,王永标,龚淑云.一条新发现的奥陶系—志留系界线剖面[J].现代地质,2006,20(3):409-412. |
| 作者姓名： | 苏文博 王永标 龚淑云 |
| 作者单位： | 1. 中国地质大学,地球科学与资源学院,北京,100083 2. 中国地质大学,地球科学学院,湖北,武汉,430074 3. 广东省深圳市地质局,广东,深圳,518031 |
| 基金项目： | 国家自然科学基金;科技部"攀登计划";国家重点实验室基金 |
| 摘 要： | 在贵州省桐梓县红花园乡南坝子村发现一条新的穿越奥陶系—志留系界线的地层剖面。该剖面自下而上依次出露有宝塔组、涧草沟组、五峰组和龙马溪组等,露头良好,产状平缓,化石丰富。其五峰组观音桥段顶部与龙马溪组交界处,即穿越奥陶系—志留系界线的一段地层,横向上可连续追索逾百米。自五峰组底部到龙马溪组底部(相当于D icellograptus complanatus带—Coronograptus cyphus带下部)的地层中已发现25层斑脱岩。根据生物地层、层序地层等资料初步确认了这些斑脱岩与湖北宜昌等地的斑脱岩具高分辨对比性。该剖面的发现为华南奥陶系—志留系界线附近的各项研究提供了新的资料。 |
| 关 键 词： | 界线剖面 奥陶系 志留系 华南 |
| 文章编号： | 1000-8527(2006)03-0409-04 |
| 收稿时间： | 05 2 2006 12:00AM |
| 修稿时间： | 06 10 2006 12:00AM |
A New Ordovician-Silurian Boundary Section in Guizhou, South China |
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| SU Wen-bo,WANG Yong-biao,GONG Shu-yun.A New Ordovician-Silurian Boundary Section in Guizhou, South China[J].Geoscience——Journal of Graduate School,China University of Geosciences,2006,20(3):409-412. | |
| Authors: | SU Wen-bo WANG Yong-biao GONG Shu-yun |
| Institution: | 1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China; 2. Faculty of Earth Sciences, China University of Geosciences, Wuhan, Hubei 430074, China; 3. Bureau of Geology of Shenzhen, Shenzhen, Guangdong 518031, China |
| Abstract: | Recently,a new Ordovician-Silurian boundary section has been discovered at Nanbazi village of the Honghuayuan Township,Tongzi County,Guizhou Province,South China.In this perfect section,the outcrop of the strata interval,which include the Baota Fm.,the Jiancaogou Fm.,and the Wufeng Fm.,as well as the Longmaxi Fm.,in ascending order,exposed pretty well with low dip direction of the beds and abundant of various fossils.The transition interval of the Ordovician-Silurian boundary,from the top of the Guanyinqiao Member of Wufeng Fm.through into the lowermost Longmaxi Fm.,can be traced horizontaly about one hundred meters.Moreover,25 layers of K-bentonite beds have been recognized from the Wufeng Fm.through into the lower part of Longmaxi Fm.With the studies of biostratigraphy and sequence stratigraphy,the present K-bentonite beds have been determined preliminarily that they can be correlated fairly well in high-resolution with those of in Yichang,Hubei Province and other areas.This new section will be a valuable clue for the relevant study(focused) on the Ordovician-Silurian boundary in South China. |
| Keywords: | boundary section Ordovician Silurian South China |
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