| 辽西义县组碳酸盐岩夹层及其环境意义 |
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| 引用本文： | 巩恩普,陈登辉,梁俊红,张永利.辽西义县组碳酸盐岩夹层及其环境意义[J].地质学报,2011,85(4):459-466. |
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| 作者姓名： | 巩恩普 陈登辉 梁俊红 张永利 |
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| 作者单位： | 东北大学,东北大学地质系，沈阳，110004;西安地质矿产研究所，西安，710054,东北大学地质系，沈阳，110004,东北大学地质系，沈阳，110004 |
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| 基金项目： | 国家教育部博士点基金(20060145016)资助 |
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| 摘 要： | 义县组是热河生物群最繁盛的层位,它承载了热河生物群演化的重要信息,开展义县组沉积环境的深入研究是认识和恢复热河生物群生活环境的有效途径.辽西地区义县组中夹有多层碳酸盐岩沉积层,所含沉积环境信息丰富.通过碳酸盐岩的研究,获取碎屑岩中丢失的环境信息,并与碎屑岩沉积层的研究相结合,为恢复辽西地区义县期热河生物群的古地理、古气...
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| 关 键 词： | 辽西地区 义县组 碳酸盐岩夹层 沉积环境 |
| 收稿时间： | 2010/11/3 0:00:00 |
| 修稿时间： | 2010/12/20 0:00:00 |
The carbonate interlayers and their environmental significance of Yixian Formation in Western Liaoning |
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| gongenpu,CHEN Denghui,LIANG Junhong and ZHANG Yongli.The carbonate interlayers and their environmental significance of Yixian Formation in Western Liaoning[J].Acta Geologica Sinica,2011,85(4):459-466. |
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| Authors: | gongenpu CHEN Denghui LIANG Junhong and ZHANG Yongli |
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| Abstract: | The Yixian Formation is the most important bed for Jehol Biota. A lot of fossils preserved well of Jehol Biota were found in Yixian Formation which recorded the important information of the Jehol Biota evolution. In order to understand and rebuild the living environment of the Jehol Biota, it is necessary to carry out further sedimentary environment studies of Yixian Formation. The aboundant informations of sedimentary environment were recorded in several carbonate interlayers in the Yixian Formation of Western Liaoning. Through the studies of the carbonates, the lost environmental informations of the clastic rock can be obtained. The studies on carbonate and clastic rock provide scientific evidences for rebuilding the palaeoclimate, palaeogeography and palaeoecology of Yixian Jehol Biota of Western Liaoning. Eight lithotypes of carbonates have been identified by studies in the field and laboratory. The environmental analysis has been done by studying the sedimentary characteristics of the carbonate. The field works indicate that the development of the carbonate interlayers has the tendency of increase in terms of the layers and carbonate content to the southern direction of the basin. The palaeoenvironment of the Western Liaoning was dominated by shore-shallow lacustrine facies in Yixian period, and the carbonates mainly deposited in very shallow depressions on the floodplain as well as slight-brackish water in shore-shallow lacustrine environment. When the carbonate deposited, the climate was relatively dry and hot, the lake hydrology tended to close, volcanic activities were frequent and the lacustrine water supply was less than evaporation. |
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| Keywords: | Western Liaoning Yixian Formation carbonate interlayers sedimentary environment |
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