摘要
舒兰第三系含煤盆地是受依—伊地堑控制形成的半地堑式线型盆地，充填有古新世—中新世地层，其地层构造格架、沉积特征均具典型的陆相断陷盆地特点。盆地沉积经历了初始断陷—裂陷扩大—萎缩等８ 个构造沉积演化阶段。含煤地层主要为舒兰组，具有湖前和湖后两个聚煤期。聚煤环境主要为河流洪积平原的三角洲，扇前湿地环境。
Tertiary coal basin in Shulan is controlled by Yilan-Yitong graben,deposited Paleocene-Miocene strata, whose strata teconic framework and sedimentary are characteristiced by contineutal fault basin. The basin occured in the early extensionthe middle large extension-the late contraction. It is divided into eight tectonic and sedimentary stages.The main coal-bearing strata is Shulan form,the coal-accumulation period including pre-lake facies and paul-lake facies. Coal accumulation environments are mainly the delta of stream-flood plain and marsh.
出处
《世界地质》
CAS
CSCD
1999年第4期47-52,共6页
World Geology
关键词
舒兰盆地
依-伊地堑
半地堑
沉积演化
聚煤
Shulan basin, Yilan-Yitong graben, semigraben, sedimentary evolution, coal accumulation, late change of tectonic
