| 华北东濮凹陷沙河街组藻类化石所记录的地质事件 |
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| 引用本文： | 范迎风,顾勤,黄俊峰,高渐珍. 华北东濮凹陷沙河街组藻类化石所记录的地质事件[J]. 微体古生物学报, 2002, 19(3): 316-321 |
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| 作者姓名： | 范迎风 顾勤 黄俊峰 高渐珍 |
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| 作者单位： | 中石化集团中原油田分公司勘探开发科学研究院,河南,457001 |
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| 摘 要： | 东濮凹陷早第三纪沙河街组产有丰富的藻类化石，淡水藻类与半咸水，咸水藻类相互交替的两个旋回在纵向上分布明显，即：沙四，沙二段为淡水藻类（主要为轮藻）发育期，沙三，沙一段为咸水，半咸水藻类（主要为沟鞭藻）发育期，根据藻类化石的生态分析。认为沙三，沙一段沉积期湖水的咸化事件是由海侵造成的。
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| 关 键 词： | 华北东濮凹陷 沙河街组 藻类化石 地质事件 古生态 |
| 修稿时间： | 2002-05-20 |
GEOLOGICAL EVENTS RECORDED IN ALGAL FOSSILS OF SHAHEJIE FORMATION, DONGPU DEPRESSION,NORTH CHINA |
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| FAN Ying feng,GU Qing,HUANG Jun feng and GAO Jian zhen. GEOLOGICAL EVENTS RECORDED IN ALGAL FOSSILS OF SHAHEJIE FORMATION, DONGPU DEPRESSION,NORTH CHINA[J]. Acta Micropalaeontologica Sinica, 2002, 19(3): 316-321 |
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| Authors: | FAN Ying feng GU Qing HUANG Jun feng GAO Jian zhen |
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| Abstract: | The Shahejie Formation in Dongpu Depression contains prolific alga fossils. Their vertical distribution shows two alternating periods of freshwater algae and brackish water algae. The members S 4 and S 2 of the Shahejie Formation belong to the development period of freshwater algae (mainly charophytes while the members S 3 and S 1 belong to the development period of saltwater and brackish water algae(mainly dinoflagellates). It is thought that the salinizing events during S 3 and S 1 were coursed by sea transgression. |
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| Keywords: | alga fossil Shahejie Formation palaeo ecology geological events Dongpu Depression North China |
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