Microfacies of Peloidal Limestone of Middle Permian Chihsia Formation at Guangyuan , Sichuan
详细信息
- 责任者：Ma Zhixin (Key Laboratory of Biogeology and Environmental Geology ; Ministry of Education ; China University of Geosciences ; Wuhan 430074 ; China) ; Li Bo
- 刊名：Acta Sedimentologica Sinica
- 出版年：2011
- 卷期：29(3)
- 关键词：limestone ; 沉积微相 ; sedimentary microfacies ; 沉积环境 ; sedimentary environment ; 四川 ; Sichuan Province
- 页码：p.449-457
- 图表：5 illus., 43 refs.
- 分类号：0803
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
Carbonate shoal develops in the middle part of Chihsia Formation at Shangsi Section of Guangyuan, Sichuan Province. Under microscope, abundant peloids and cortoids were identified. The peloids are classified into three types: fecal pellets, bahamite peloids and microbial peloids. The bahamite peloids are the most common grains observed. They are micritized bioclasts in origin, mainly including red algae, benthic foraminifera, crinoid and minor other shallow water organisms. Based on grain type, sedimentary fabric and microfacies analysis, the peloidal shoal can be subdivided into shoal, shoal fringe and inter-shoal.
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