贵州台江中寒武世凯里生物群古生态研究
Paleoecology of the Kaili Biota from Middle Cambrian in Taijiang County, Guizhou Province, China
查看参考文献22篇
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文摘
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凯里生物群是世界三大布尔吉斯页岩型生物群之一。本文通过古生物个体埋藏保存情况、古生物个体生态学、沉积学和地球化学等的研究和分析，认为凯里生物群中大部分分子是从异地搬运到陆棚环境埋藏的。同时，提出了凯里生物群的埋藏机理模式和生态复原因。 |
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其他语种文摘
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The Kaili Biota is the third most diverse Burgess Shale-type biota after the Burgess Shale and Chengjiang biota. In the paper, on the basis of the study on the burial characteristics of fossils, the ecological be havior of animal and algae, and the analysis of depositional characteristics and the geochemical parameter, we consider that most animals and algae in the Kaili Biota lived at the shallow water, and these organisms are carried into continental shelf by tempesite or turbidity flow and is buried in continental shelf. At the same time, the burying mechanism of the Kaili biota is put forward in this paper. On the basis of the analyses of sedimentary sequences and taphonomic sequences of fossil in Kaili Fm. bearing-Kaili Biota, and combining research of geochemistry and paleo-ecology and taphonology, the Kaili Biota is considered that most organisms are characterized by ecological behavior of shallow water, these animals and algae living in shallow water were destroyed by even of tempesite or turbidity flow, and carried into deeper shelf, and buried at shelf. Some researches suggested that the Kaili Biota live at 150 ～ 200 meters water in depth; they reached this conclusion from lithology and lithofacies, and trace fossil assemblage in Kaili Formation. We disagree with above-mentioned view about the Kaili Biota lived below 150 ～ 200 meter deep but agree that the Kaili Biota uas buried at shelf below 150 ～ 200 meter water in depth. Therefore, we consider that most animals and algae in the Kaili biota lived at shallow water, and they were carried into shelf by tempesite or turbidity flow and were buried in shelf. The conclusion is suggested by the following sedimentary characteristics and fossil assemblage in Kaili Fm. 1, A lot of algal fossils (about 20 genus), containing red algae, blue algae, and brown algae, occur in the Kaili Biota. According to ecological distribution of modern algae, so high diverse algae only live at shallow sea (less than 90 meter in depth). 2, Until now, the Kaili Biota contains more than 100 genus animal fossils, so high diverse animals only live at shallow sea (less than 90 meter in depth). 3, Most fossils were persevered at D layer of tempesite or turbidity sequence, this is the fossil buried sequence C, but shelf shale (analogous to E layer of tempesite or turbidite sequence) only contains few fossils. On the basis of fossil distribution in the tempesite or turbidity sequence, we believe that most organisms were carried into shelf from shallow water region by tempesite or turbidity flow. |
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来源
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沉积学报
,2002,20(1):129-134,155 【核心库】
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关键词
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古生态
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凯里生物群
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中寒武世
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贵州
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地址
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1.
中科院贵阳地球化学所, 环境地球化学国家重点实验室, 贵阳, 550002
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贵州工业大学资源与环境学院, 贵阳, 550003
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0550 |
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学科
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古生物学 |
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基金
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国家自然科学基金
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贵州工业大学博士启动基金
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文献收藏号
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CSCD:964594
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