|
|||||
|
|
| 北京西山下苇甸中寒武统张夏组生物丘发育特征及其地质意义 | |
| 引用本文： | 赫云兰,刘波,秦善,赵鹏沄.北京西山下苇甸中寒武统张夏组生物丘发育特征及其地质意义[J].地质科技情报,2012,31(1):9-15. |
| 作者姓名： | 赫云兰 刘波 秦善 赵鹏沄 |
| 作者单位： | 1. 北京大学地球与空间科学学院,北京100871;北京大学石油与天然气研究中心,北京100871 2. 北京大学石油与天然气研究中心,北京,100871 3. 北京大学地球与空间科学学院,北京,100871 |
| 基金项目： | 中国石油化工股份有限公司海相前瞻性项目(C0800-07-ZS-162) |
| 摘 要： | 北京西山下苇甸剖面寒武系地层出露完整,中寒武统张夏组底部和顶部发育两期生物丘地层.通过野外观察及薄片鉴定发现,张夏组底部发育的生物丘为凝块石生物丘,顶部发育的为叠层石生物丘,两期生物丘的造丘生物主要为藻类.凝块石生物丘生长在低能的潮下带环境,而叠层石生物丘则形成于海水能量较高的潮间带或潮下带上部.不同的沉积环境造成了两期生物丘内部结构的差异,主要体现在造丘生物的排列方式上.根据该剖面两期生物丘的特征,总结了生物丘的发育模式,并对其地质意义进行了探讨. |
| 关 键 词： | 生物丘 北京 下苇甸 中寒武统 张夏组 |
The Bioherm and Geological Significance of Middle Cambrian Zhangxia Formation at Xiaweidian Profile in West Hill, Beijing, China |
|
| HE Yun-lan , LIU Bo , QIN Shan , ZHAO Peng-yun.The Bioherm and Geological Significance of Middle Cambrian Zhangxia Formation at Xiaweidian Profile in West Hill, Beijing, China[J].Geological Science and Technology Information,2012,31(1):9-15. | |
| Authors: | HE Yun-lan LIU Bo QIN Shan ZHAO Peng-yun |
| Institution: | yuna(a.School of Earth and Space Sciences;b.Institute of Oil and Gas,Peking University,Beijing 100871,China) |
| Abstract: | The Xiaweidian profile,exposed well,is one of the best profiles for study of Cambrian sedimentation in Western Hill,Beijing.Two phases of bioherms developed in the bottom and upper Middle Cambrian Zhangxia Formation respectively.By the outcrop and thin section,the bottom bioherm is a clot bioherm and the upper bioherm is a stromatolite bioherm.The bioherm-building organisms are dominated by algae.The clot bioherm developed in subtidal environment and the stromatolite bioherm in intertidal or upper subtidal environment.The sedimentary environment controls the inner structure of both bioherms differently.The main differences are arrangement of bioherm-building organisms.This paper discusses the hioherm-forming model and geological significance on the detail characteristics of two phases of bioherms. |
| Keywords: | bioherm Beijing Xiaweidian Middle Cambrian Zhangxia Formation |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |