法国典型聚煤盆地厚煤层独特的沉积条件分析Analysis on the sedimentary conditions of thick coalbeds in French faulted coal basins
王华,郑云涛,杨红
WANG Hua;ZHENG Yun tao (China University of Geosciences;Wuhan 430074;
摘要(Abstract)：
从法国典型的断陷聚煤盆地具有重要经济价值的厚煤层的成因标志和沉积特征出发 ,对这些厚煤层独特的沉积条件进行了剖析 ,指出了厚煤层均发育于盆缘、盆内断层活动强烈的构造背景下。煤层内大量的重力流沉积物——碎屑流、稀性泥石流、重力滑塌、变形构造和再搬运—再堆积的记录等特征 ,均表明了这些厚煤层在堆 (沉 )积时为较深覆水、且水体动荡的湖泊沉积环境 ,部分厚煤 (泥炭 )层在初次堆积后经过了再搬运而在异地堆积
Based on the analysis of the abundant sedimentary indicators of the thick coalbeds in three coal forming faulted basins on the Massif Central of France,the distinct accumulation pattern of thick coalbeds and sedimentary conditions are discussed.A new formation mechanism for the intramontagneous thick lacustre coal (peat) accumulation model is demonstrated.The subaquatic gravitary current transported the organic (peat) and inorganic clasts formed in lakeshore swamp were formed in active clastic environment,and were associated with various gravity influenced mudstone and sandstone interlayers.The new thick coalbeds accamalation model can provide reasonable interpretation to genesis of the intramontagneous thick coal beds.
关键词(KeyWords)：
断陷聚煤盆地;沉积条件;厚煤层;法国中央地块
fault coal basin;thick coal seam;sedimentary conditions;France Massif Central
基金项目(Foundation): 国家自然科学基金资助项目 !(4 990 2 0 12 )
作者(Authors):
王华,郑云涛,杨红
WANG Hua;ZHENG Yun tao (China University of Geosciences;Wuhan 430074;
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