| 辽宁本溪牛毛岭本溪组腕足动物群落及其古环境意义 |
| |
| 引用本文： | 高金汉,王训练,王燕,王艳丽.辽宁本溪牛毛岭本溪组腕足动物群落及其古环境意义[J].古地理学报,2007,9(5):499-511. |
| |
| 作者姓名： | 高金汉 王训练 王燕 王艳丽 |
| |
| 作者单位： | 1.中国地质大学（北京）地质过程与矿产资源国家重点实验室 北京100083;2.中国地质大学（北京）岩石圈构造、深部过程及探测技术教育部重点实验室 北京100083;3.中国地质大学（北京）地球科学与资源学院 北京 100083 |
| |
| 摘 要： | 通过对本溪牛毛岭本溪组底栖生物群落的组成结构和个体生态研究，详细探讨了各群落的古环境意义，结合剖面沉积相和沉积旋回分析，探讨了相对海平面变化对群落取代的影响。本溪组上、下段沉积时期主要受潮汐作用影响，而中段沉积时期河流作用明显。辽宁本溪地区本溪期底栖生物群落的生态位主要集中在BA1－BA3之间，即潮间、潮上带到潮下浅海环境，沉积最大水深一般不超过60 m。古水深是控制各环境因素变化的重要原因，也是控制群落取代的根本原因。在水深变化不大的情况下，底质环境、海水含盐度、水动力强度等对群落的内部演替和群落之间的相互取代都具有重要影响。底栖生物群落生态位变化和剖面沉积相分析所揭示的海水深度的垂向变化规律，显示该区石炭纪本溪期经历了四次明显的三级相对海平面变化旋回。与华北其他地区相比，本区本溪期多了一次海平面变化旋回，显示该区本溪期海侵较早，该区下部旋回发育时，华北其他地区尚未接受沉积。
|
| 关 键 词： | 辽宁本溪 石炭系 本溪组 腕足动物 群落 古生态学 相对海平面变化 |
| 文章编号： | 1671-1505（2007）05-0499-13 |
| 修稿时间： | 2007-06-20 |
Brachiopod communities from the Benxi Formation of Carboniferous at Niumaoling in Benxi City of Liaoning Province and their palaeoenvironmental significance |
| |
| Gao Jinhan,Wang Xunlian,Wang Yan,Wang Yanli.Brachiopod communities from the Benxi Formation of Carboniferous at Niumaoling in Benxi City of Liaoning Province and their palaeoenvironmental significance[J].Journal of Palaeogeography,2007,9(5):499-511. |
| |
| Authors: | Gao Jinhan Wang Xunlian Wang Yan Wang Yanli |
| |
| Institution: | 1.State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences (Beijing), Beijing 100083;2.Key Laboratory of Lithospheric Tectonics and Lithoprobing Technology, Ministry ;
of Education, China University of Geosciences (Beijing), Beijing 100083;3.School of Earth Sciences and Resources, China University of Geosciences (Beijing), Beijing 100083 |
| |
| Abstract: | According to the section measured and fossils collected for the Benxi Formation of Carbonif- erous at the Niumaoling site of Benxi city of Liaoning Province,the autoecology and the textures of the ben- thic communities are analyzed in detail and the palaeoenvironmental significance of the communities is dis- cussed.Meanwhile,combined with the analyses of sedimentary facies and depositional cycles of the section, the influence of the relative sea level changes to the replacement of the communities has also been studied. The results show that(1)The lower and upper members of the Benxi Formation were mainly controlled by tidal action while they were deposited,but the middle member was influenced mainly by river action;(2) The ecological positions of the benthic communities of the Benxi Formation were mainly distributed between BA1 to BA3,which were located in the eulittoral zone with the water depth being not more than 60 meters; (3)The water depth played a very important role in the change of environmental factors,and it controlled the replacement of the communities.In the case of little change in water depth,the substratum,water salini- ty and hydropower conditions played a key role in the internal succession within a community and the re- placement between two communities;(4)During the deposition of the Benxi Formation of Carboniferous, four cycles of relative sea level changes could be identified based on the study of sedimentary facies and community palaeoecology.There was one more cycle than that found in the other part of North China,which indicates that the transgression of Carboniferous in the study area occurred earlier. |
| |
| Keywords: | Lianoning Benxi Carboniferous Benxi Formation brachiopods community palaeoecology relative sea level changes |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《古地理学报》浏览原始摘要信息 |
| 点击此处可从《古地理学报》下载免费的PDF全文 |
