| 四川龙门山区早泥盆世Emsian期群落古环境分析 |
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| 引用本文： | 李祥辉.四川龙门山区早泥盆世Emsian期群落古环境分析[J].矿物岩石,1992,12(3):57-65. |
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| 作者姓名： | 李祥辉 |
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| 作者单位： | 成都地质学院 成都 |
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| 摘 要： | 通过对群落特征生物构造、生态习性、成活曲线、赋存围岩沉积及群落构成内容等特征分析,本文认为四川龙门山区Emsian期地层已经识别的以腕足动物为主的八个底栖群落生态位集中于B.A.3,少数可归入B.A.2,其相当的沉积环境主要为浅海内陆棚相、台地生物礁相。
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| 关 键 词： | 群落 腕足动物 泥盆世 Emsian期 |
PALAEOENVIRONMENTS OF EIGHT BENTHIC COMMUNITIES IN EMSIAN STAGE OF LOWER DEVONIAN FROM MT. LONGMEN, SICHUAN PROVINCE |
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| Li Xianghui.PALAEOENVIRONMENTS OF EIGHT BENTHIC COMMUNITIES IN EMSIAN STAGE OF LOWER DEVONIAN FROM MT. LONGMEN, SICHUAN PROVINCE[J].Journal of Mineralogy and Petrology,1992,12(3):57-65. |
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| Authors: | Li Xianghui |
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| Abstract: | The analysis from structures, habits, living curves of dominative species with community components and host rocks,shows that six communities were in B. A. 3 and two in B. A. 2,inclding Otospirifer xie jiawanensis community and Neoathyrisina community. These benthic communities has been lived in a shallow sea in which physical environment factors such as temperature, salinity etc. were moderate. Two kinds of substrate are concluded from the study: mud/silt soft substrate in Ganxi Formation, harder line/reef substrate in Yanmenba Formation. The living curve of most communities were steady and there was no determinated fluctuation in environment factors. |
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| Keywords: | Mt Longmen area Emsian stage community environment ecological position shallow sea |
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