| 云南罗平生物群产出层位沉积微相及其化石富集规律 |
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| 引用本文： | 白建科,尹福光,张启跃.云南罗平生物群产出层位沉积微相及其化石富集规律[J].中国地质,2011,38(2):393-402. |
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| 作者姓名： | 白建科 尹福光 张启跃 |
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| 作者单位： | 1. 中国地质调查局西安地质调查中心,陕西,西安,710054
2. 中国地质调查局成都地质调查中心,四川,成都,610081 |
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| 基金项目： | 中国地质调查局区域地质调查项目 |
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| 摘 要： | 云南罗平上石坎剖面是产出罗平生物群的代表性剖面。参考Wilson的标准微相模式,从产化石层位识别出6种沉积微相:灰泥灰岩、生屑粒泥灰岩、粪球粒-生屑泥灰岩、纹层状泥晶灰岩、生屑泥粒灰岩和砾屑灰岩。通过在化石采掘现场对化石富集层位的统计,将产化石层位细分为生物群上层段UFH(Upper Fossil Horizon)和生物群下层段LFH(Lower Fossil Horizon),并进一步探讨了每个层段中沉积微相与化石富集规律的关系,发现化石富集程度高的层段主要发育灰泥灰岩、生屑粒泥灰岩、粪球粒-生屑泥灰岩、纹层状泥晶灰岩等4种沉积微相。这种沉积微相组合主要发育在深水、低能的台内盆地环境中,环境水体的滞留、缺氧给生物埋藏提供了良好的条件。
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| 关 键 词： | 罗平生物群 沉积微相 化石富集规律 台内盆地 |
Microfacies and enrichment pattern of fossils in the fossiliferous beds of Luoping Biota, Yunnan Province |
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| BAI Jian-ke,YIN Fu-guang,ZHANG Qi-yue.Microfacies and enrichment pattern of fossils in the fossiliferous beds of Luoping Biota, Yunnan Province[J].Chinese Geology,2011,38(2):393-402. |
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| Authors: | BAI Jian-ke YIN Fu-guang ZHANG Qi-yue |
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| Institution: | BAI Jian-ke1,YIN Fu-guang2,ZHANG Qi-yue2(1.Xi'an Center of China Geological Survey,Xi'an 710054,Shaanxi,China,2.Chengdu Center of China Geological Survey,Chengdu 610081,Sichuan,China) |
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| Abstract: | Shangshikan stratigraphic section in Luoping of Yunnan Province is a representative fossiliferous bed that produced Luoping Biota.According to the standard microfacies model put forward by Wilson(1975),the authors recognized six types of microfacies,i.e.,marlite,bioclastic wackestone,pelleted-bioclastic marlite,laminated micrite,bioclastic packstone and calcirudite,in the fossiliferous bed of Shangshikan section.The fossiliferous bed can be subdivided into two horizons: the Upper Fossil Horizon(UFH) and the... |
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| Keywords: | Luoping biota microfacies enrichment pattern of fossils intra-platform basin |
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