呼和诺尔盆地伊敏组含煤特征分析 .pdfVIP

学兔兔 第22卷5期 中 国 煤 炭 地 质 V0l_22 No．5 2010年5月 C0AL GEOL0GY 0F CHINA Mav． 2010 doi：10．39690．issn．1674-1803．2010．05．06 文章编号：1674—1803(2010)05—0023—06 呼和诺尔盆地伊敏组含煤特征分析 万 欣 (江西中煤建设工程有限公司，江西 南昌 330001) 摘 要：呼和诺尔盆地属海拉尔盆地群，为张性盆地，区域性的北东向断裂控制了盆地的形态和规模。盆地主要含煤 地层为下白垩统伊敏组，发育11个煤组，其中4煤组、8煤组煤层较稳定，全区大部可采；11煤组煤层稳定，厚度达 15～20m，为全区主要可采煤层。根据伊敏组含煤地层沉积特征，，划分了四个沉积旋回，分析了影响煤层沉积的主要 因素，认为盆地沉积明显受同沉积断层的控制，表现在断层两盘岩层生长指数和沉积特征均有明显的差异。本次研 究将对海拉尔盆地乃至相邻蒙古国盆地的煤田勘查提供借鉴。 关键词：伊敏组；含煤特征；煤聚煤规律；沉积旋回；同沉积断层 中图分类号：P618．11 文献标识码：A Coal-bearing Characteristic Analysis of Yimin Formation in Hohnur Basin，Inner Mongolia Wan Xin (Jiangxi China Coal Construction Engineering Co．Ltd．，Nanehang，Jiangxi 330001) Abstr act：The Hohnur Basin is one of basins in the Hailar basin group and a tensional basin，regional NE faults controlled configuration and scope of the basin．Main coal-beating strata belong to the Yimin Formation and total 1 1 coal groups have been developed．In which，Nos．4 and 8 coal groups are rather stable，mostly mineable in whole area；No．1 1 coal group is stable，15~20m thick，the main mineable coal seam in whole area．Through the research on coal accumulating pattern of the coal—beating strata in Yimin Formation，analyzed main factors impacting coal seam deposition，four sedimentary cycles were divided．The analysis considered that the basin has controlled by synsedimentary faulting obviously，found expression in distinct differences of growth indices and sedimentary characters of strata of both fault walls．The study will provide references for coal exp]oration in whole Hailar basin group a