中国南方晚二叠世乐平煤的成因及成煤物质  

ORIGIN AND PRECURSORS OF LATE PERMIAN LEPING COAL IN SOUTHERN CHINA

作　　者：陈其奭 陈能贵[1] 

机构地区：[1]中国石油天然气总公司杭州石油地质研究所

出　　处：《海相油气地质》1996年第2期29-33,T001,共6页Marine Origin Petroleum Geology

摘　　要：乐平煤是分布于苏浙皖赣地区龙潭组中的特有煤种(俗称树皮煤),也是一种具良好生烃潜力的烃源岩。乐平煤中,壳质组和可溶有机质含量高,母质类型为高等植物和低等生物双重来源,元素组成具富氢、低氧、高含硫的特征,应属海相成因的泥炭坪沉积。成煤物质主要来源于真蕨、种子蕨和科达类等植物的树皮体。树皮体又可分为茎皮体和根皮体两种亚组分。依据煤的显微组分组成和树皮体富集程度的不同,乐平煤可分为原地型、过渡型和微异地型三种成因类型。乐平煤的研究对整个南方二叠纪煤成烃资源的评价具重要的地质意义。Leping coal,commonly called as bark coal,is a peculiar sort of coal which is distributed in the areas of Jiangshu, Zhejiang,Anhui and Jiangxi provinces.This coal is regarded as a potential source rock.It is revealed that the coal was o- riginated from peat flats .The coal-forming substances were mostly derived from the barks of plant including Fi- ices,Pteridospermopsida and Cordaitopsida.The barks may be divided into stem bark and root bark.The coal is classi- fied into autochthonous (Type Ⅰ),intermediate (Type Ⅱ) and allochthonous(Type Ⅲ).The study of the coal is signif- icant for assessing the resource of Permian coal-derived oil.

关 键 词：煤矿床 成因 成煤物质 晚二叠世 

分 类 号：P618.110.1[天文地球—矿床学] P618.110.4[天文地球—地质学]