| 摘要: |
| 风暴沉积岩在黔南泥盆系地层中比较常见,其中的遗迹化石也较为丰富。为研究风暴遗迹相提供了良好的场所。风暴作用的强度和持续时间影响了沉积环境的水能量、舍氧量等物化条件。遗迹化石群也随之有所变化。本文研究了发生在Glossifungites,Skolithos,Cruziana和Zoophycos等不同遗迹相环境中的风暴沉积遗迹化石组合,把它们划分为三种类型:(1)单调型风暴遗迹相,风暴作用较弱,风暴沉积过程中的遗迹化石属种和数量较少,但仍与风暴前后的遗迹化石组合属于Seilacher (1967)的相同遗迹相;(2)混合型风暴遗迹相,风暴沉积形成新的遗迹相附加于较低能的遗迹相中,(3)多元混合型风暴遗迹相,随着强烈风暴作用强度的变化,在风暴沉积期出现两种以上遗迹相的沉积环境。 |
| 关键词: 风暴沉积 遗迹化石 风暴遗迹相 泥盆系 黔南 |
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| THE STORM-RELATED ICHNOFACIES IN THE DEVONIAN STRATA IN SOUTHERN GUIZHOU |
| Wang Yue, Gong Yiming |
(1 Dushan Administration of Territorial Resources of Guizhou;
2 China University of Geosciences, Wuhan) |
| Abstract: |
| The trace fossils abound in the storm deposits of the Devonian strata in Southern Guizhou.The detailed research was conducted in order to improve our knowledge of the storm-related ichnofacies. The strength and duration time of storm processes tend to affect the physical and chemical conditions of sedimentary environments and give rise to the changes in trace fossil assemblages.The present paper describs the storm-related trace fossil assemblages in Glos-sifingites,Skolithos,Cruziana and Zoophycos ichnofacies of Seilacher(1967)in the Devonian strata in Southern Guizhou.Three types of storm-related ichnofacies have been distin-guished.(1)The monotype storm-related iehnofacies resulted in the environments where the storm processes are relatively weak.The trace fossils decrease in genus and species and amount in the ichnofacies,and appear mainly in Seilacher's Skolithos and Cruziana ichnofa-cies.(2)The mixed storm-related ichnofacies means that a new ichnofacies formed during storm deposition is superimposed upon the preexisting lower-energy ichnofaeies.(3)The mixed multiple storm-related ichnofacies implies that more than two storm-related ichnofa-6ies occur simultaneously during storm deposition in response to the increasing strength of storm processes. |
| Key words: storm deposits trace fossil strom-related ichnofacies Devonian Southern Guizhou |
