| 桂西乐业地区二叠系荷叶藻风暴岩的沉积特征 |
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| 引用本文： | 陆刚,李文强.桂西乐业地区二叠系荷叶藻风暴岩的沉积特征[J].南方国土资源,1992(4). |
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| 作者姓名： | 陆刚 李文强 |
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| 作者单位： | 广西区域地质调查队，广西区域地质调查队 桂林 541003，桂林 541003 |
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| 摘 要： | 二叠系荷叶藻风暴岩在广西属首次发现。它广泛发育在乐业背斜构造的二叠系中。本文通过对两条典型剖面研究,论述了风暴岩的层序、沉积特征、组合类型及其分布,并探讨其沉积模式。认为:该风暴岩主要产于下二叠统栖霞组中部和茅口组底部两个层位的生物屑灰岩中,由荷叶藻及其它生物屑构成各种风暴沉积特征(如粒序层、平行层、丘状层、底面构造……),风暴沉积形成于孤立碳酸盐台地环境,并具有从台缘→台地中心、由近积风暴岩→远积风暴岩→次风暴岩分布规律。指出风暴岩的发现不仅具有沉积学意义,而且对二叠系的地层对比和藻灰岩的成因提供了依据和信息。
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| 关 键 词： | 风暴岩 二叠系 孤立碳酸盐岩台地 荷叶藻 广西 |
THE SEDIMENTARY CHARACTERISTICS OF PERMIAN Lotus-phylloid, algae TEMPESTITE IN LEYUE AREA, WESTERN GUANGXI |
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| Authors: | Lu Gang and Li Wenqiang |
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| Abstract: | The Permian Lotus-phylloid algae tempestite has been found in Guangxi for the first time and is widely developed in the Permian system of Leyue anticline. Based on the study of two typical sections, the authors has discussed the sequence, sedimentary characteristics, assemblage type and distribution of tempestite and its sedimentary model. The authors also consider that tempestite occurs mainly in the bioclastic limestone at the middle part of Xixia Formation and the basal part of Maokou Formation (Lower Permian), the lotus-leaf algae and other bioclastics constitute various kinds of tempestite characteristics such as graded bed, evenly bed, hummocky bed, basal-plane structures and so on; the tempestite is formed in the isolated carbonate platform and is distributed from proximal tempestite to distant tempestite to subtempestite from platformal margin to center. The discovery of tempestite not only possesses the significance to sedimentology, but also provides basis and information for stratigraphic correlation and the genesis of algal limestone in the Permian. |
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| Keywords: | tempestite Lotus-phylloid algae carbonate platform Permian Guangxi |
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