Sedimentary Environment and Microfacies Analysis of the Late Carboniferous Phylloid Algal Reef in the Ziyun County， Guizhou

Key words: 
• phylloid reef

Abstract: The late Carboniferous phylloid aglal reef occurs in the carbonate platform margin. In this paper the phylloid reef's microfacies characteristic and sedimentary environment are analyzed by the way of detailed section microfacies analysis.We summed up 6 carbonate microfacies，i.e. bioclastic wackstone, bioclastic packstone, pelleted bioclastic packstone, phylloid algal wackstone and packstone, brachiopod packstone, bioclastic grainstone. We sums up a part sedimentary facies model, transfers from the depth open carbonate platform facies, phylloid algal reef facies, inner carbonate platform slope facies, inner carbonate platform shallow slope facies, shallow open carbonate platform facies, to intraplatform shoal facies, analyzing sedimentary environment of phylloid aglal reef. Based on the distribution of microfacies in the section, we can speculate it is the open carbonate platform environment in subtidal zone.