滇东老厂煤田晚二叠世聚煤环境剖析与成煤模式Discussion on Late Permian coal-accumulating environment and its coal-forming pattern in Laochang coalfield,eastern Yunnan Province,China
郑玉清,王建琼
ZHENG Yu qing 1;WANG Jian qiong 2 (1.Yunnan Provincal Coalfield Geological Bureau;
摘要(Abstract)：
通过对滇东老厂煤田形成的地质背景和晚二叠世含煤地层沉积特征的综合分析 ,剖析了典型的潮坪聚煤环境和三角洲聚煤环境及其成煤作用。该区晚二叠世的海陆过渡环境演化顺序为 :局限碳酸盐台地—泻湖潮坪—浅水三角洲聚煤环境 ,其中从龙潭中期末至长兴期各种聚煤条件配合最有利于聚煤。所以 ,后期的潮坪和浅水三角洲是该区最重要的聚煤环境。据此 ,初步建立了该区晚二叠世聚煤期的环境演化与成煤模式
The authors comprehensively analyzed the geological background and the epositional characteristics of the Late Permian coal bearing strata in Laochang coalfield,eastern Yunnan.The typical coal accumulating environment and coal forming effects with the tidal flats and the deltas are discussed in details.Accordingly,it was recognized that sequence of the environmental evolves of the Late Permian strata in this area is :the confining carbonate platform—the lagoons and the tidal flats—the shallow water deltas of sea.The coordination of various conditions was most suitable to coal accumulating from the Middle Longtan stage to the Chanxing stage of the Late Permian.As a result,these tidal flats and these shallow water deltas of the Late Later stage Permian are the most important coal accumulating environments in this area.They formed numerous more stable and thicker coal seams.Based on this,The coal accumulating environment evolves and coal forming pattern of the coal accumulating stage of the Late Permian in this area was established primarily.
关键词(KeyWords)：
聚煤环境;成煤模式;晚二叠世;滇东老厂煤田
coal accumulating environment;coal forming pattern;Late Permian;Laochang coalfield
基金项目(Foundation):
作者(Authors):
郑玉清,王建琼
ZHENG Yu qing 1;WANG Jian qiong 2 (1.Yunnan Provincal Coalfield Geological Bureau;
参考文献(References)：
文章评论(Comment)：
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