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湖北宜昌黄花场早奥陶世岩相和沉积环境
石油与天然气地质
1996年 17卷 第No.4期
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Title
FACIES AND ENVIRONMENT OF EARLY ORDOVICIAN AT HUANGHUACHANG,YICHANG,HUBEI
Authors
Hu Mingyi
Gong Wenpin Xiao Chuantao
Zhu Zhongde
摘要
宜昌黄花场下奥陶统可划分为流水成。的颗粒岩,生物成因的礁灰岩,生物化学成回的叠层石灰岩。复合成因的白云岩、泥灰岩及页岩等4大类14种岩相。它们形成了局限台地相、开阔台地相、台地滩相、台地礁相、浅海陆棚相等5种岩相组合。从下向上有规律地形成了2种岩相序列,即碳酸盐岩台地岩相序列和沉没台地岩相序列。
Abstract
The Early Ordovician at Huanghuachang,Yichang can be classified into four group lithofacies: water current genetic grainstone ; biogenic reef limestone; biochemical genetic stromatolithic limestone;polygenetic micrltic dolostone;marl and shale. These lithofacies consist offive kinds of lithofacies asso(ations: restricted platform,open platform, platform shoal,platform reef, neritic shelf factes associations. They constitute two lithofacies sequences in ascending order:carbonate rock platform lithofacies sequence and subsided platform lithofaciessequence.
关键词：
岩相类型;
岩相序列;
岩相组合;
沉积环境;
早奥陶世;
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