摘要
从典型聚煤盆地厚煤层的成因标志和沉积特征出发 ,对煤层内大量的重力流沉积物——碎屑流、稀性泥石流和重力滑塌、变形构造及再搬运—再堆积等独特的沉积记录进行了剖析 ,指出了这些厚煤层堆积于覆水较深、且水体动荡的沉积环境中 ,部分厚煤层在初次堆积后经再搬运而堆积于异地 ,并与盆缘、盆内断裂的强烈活动性相关 ,并对“聚煤期的泥炭沼泽是在稳定—弱动荡水体或平静状态下覆水很浅的情况下持续、稳定地下沉 ,并与泥炭的堆积速率构成大体平衡的条件下发生的”、“绝大部分有经济价值的煤矿床是原地生成”
Based on the analysis of the abundant sedimentary indicators of the thick coalbeds in coal forming basins, this paper discusses the distinct accumulation pattern of thick coalbeds and sedimentary conditions A new formation mechanism for the thick coal (peat) accumulation model is demonstrated The subaquatic gravity current transported organic (peat) and inorganic clasts in lakeshore swamp were formed in turbulent environment, and were associated with various gravity influenced mudstone and sandstone interlayers The new thick coalbed accumulation model can provide reasonable interpretation of genesis of the thick coalbeds and can open a new approach for studying other genetics of thick coalbeds
出处
《地质科技情报》
EI
CAS
CSCD
北大核心
2000年第3期44-48,共5页
Geological Science and Technology Information
基金
国家自然科学基金资助项目!( 4 990 2 0 12 )
关键词
含煤盆地
厚煤层
沉积特征
动荡环境聚煤
coal forming basin
thick coalbed
sedimentary characteristics
coal accumulation in turbulent environment
