鹤岗盆地石头河子组高分辨率层序地层与聚煤规律  

High-resolution sequence stratigraphic characteristcs and coal accumulation of Shitouhezi Formation in Hegang basin

作　　者：李忠城[1] 唐书恒[1] 解慧[1] 吴敏杰[1] 吕建伟[1] 

机构地区：[1]中国地质大学能源学院,北京100083

出　　处：《煤田地质与勘探》2012年第1期1-6,共6页Coal Geology & Exploration

基　　金：国家重点基础研究发展计划(973计划)项目(2009CB219604);国家科技重大专项课题(2011ZX05034-003);国家自然科学基金项目(40972108);长江学者和创新团队发展计划(IRT0864)

摘　　要：运用高分辨率层序地层原理,通过岩心和测井资料的综合分析,对鹤岗盆地石头河子组进行了基准面旋回研究,识别出1个长期基准面旋回、5个中期基准面旋回和3种类型的短期基准面旋回。通过对比分析,建立了研究区高分辨率层序地层格架。研究表明,基准面旋回对聚煤演化起着重要的控制作用,在气候和地形条件适宜的情况下,长期基准面上升半旋回晚期和下降半旋回早期为聚煤作用有利时期,厚煤层形成于最大湖泛面附近;此期间持续时间长的中期基准面上升半旋回和较短的中期基准面下降旋回组合,有利于形成厚度大、分布范围广的煤层。研究成果对鹤岗盆地扩大深部煤炭资源勘探提供了依据。Based on the principle of the high-resolution sequence stratigraphy,the base-level cycles of Shitouhezi Formation in Hegang basin were studied through the comprehensive analysis of the bore core and well logging data.As a result,one long cycle,five intermediate cycles and three different short cycles were recognized,and the high-resolution sequence stratigraphic framework was established.The research results also show that the accumu-lation of the coal in the study area was controlled by evolving of the base level cycles.The most favorable coal-accumulating epoch occurred in the late of the rising half long base level or the early of the falling half level.Giving the appropriate climate and terrain conditions,the thick coal could form around the stage of maximum flooding surface epoch.And during this epoch,the combination of the long rising half intermediate base level cycle and the short falling half intermediate base level cycle was favorable to depositing wide and thick coal seams.The study results have provided basis for broadening exploration of deep coal resources in Hegang basin.

关 键 词：高分辨层序地层 聚煤作用 基准面旋回 鹤岗盆地 

分 类 号：P618.11[天文地球—矿床学]