吉林营城盆地构造演化与聚煤规律 .pdfVIP

学兔兔 第22卷5期 中 国 煤 炭 地 质 Vo1．22 No．5 2010年5月 COAL GEOLOGY OF CHINA Mav． 2010 doi：10．3969／j．issn．1674—1803．2010．05．04 文章编号：1674—1803(2010)05—0014—04 吉林营城盆地构造演化与聚煤规律 沈 萍 (东北煤田地质局一五五勘探队，辽宁锦州 121000) 摘 要：松辽盆地群是我国最大的油气聚集区，营城盆地位于其东部，是松辽盆地群中一个典型的聚煤盆地。松辽盆 地群基底构造及构造演化控制着营城盆地的演化和聚煤作用。营城盆地含煤层序为SE，层序，相当于沙河子组，可 进一步划分为三个体系域：盆地充填体系域、盆地扩张体系域和盆地萎缩体系域。聚煤作用发生在盆地扩张体系域． 为盆地扩张超覆沉积阶段的产物，发育 I～Ⅲ煤层组。Ⅲ煤层组厚度大，煤层稳定。几乎全区发育 是盆地初始充填体 系域和扩张体系域转化期的产物。富煤带分布于上家一饮马河东西向隆起带，呈EW向展布，煤层向凹陷区分叉、尖 灭。盆缘断裂构造的差异活动以及盆地构造演化是聚煤作用的主控因素。 关键词：聚煤作用；构造演化；营城盆地 中图分类号：P6l8．11 文献标识码：A Structural Evolution and Coal—accumulating Pattern in Yingcheng Basin，Jilin Shen Ping (No．155 Exploration Team，Northeast China Bureau of Coal Geological Exploration，Jinzhou，Liaoning 121000) Abstract：The Songliao basin group is the largest uil and gas accumulating area in China，the Yingcheng Basin is located fight in its eastern part，an unusual typical coal—accumulating basin．Basement tectonics and structural evolution controlled the evolution of the basin and coal accumulation．Coal—bearing sequence is the SE3，an equivalent of the Shahezi Formation，can be further divided into basin-filling，ba8in—expanding and basin—shrinking 3 systems tracts．The coal accumulation has happened in the basin—expanding systems tract，or the basil1一expanding overlap depositional period，and IMII coal groups were developed．The III coal group has large thickness and stable，almost developed in whole area，is a production tbrmed in the basin-filling systems tract initial period an