煤田地质与勘探2017，Vol.45Issue(4)：19-25,7.DOI:10.3969/j.issn.1001-1986.2017.04.004
木里煤田西部聚煤期层序古地理特征与聚煤作用
Sequence-paleogeography and coal accumulation of coal-accumulating period in the western part of Muri coalfield
摘要
Abstract
In order to reveal the coal series sedimentary environment and coal accumulation regularity of Muri coalfield,based on the existing research and the analysis of field reconnaissance and drilling data,this study mainly focuses on the sequence-paleogeography and the coal accumulation analysis of the Early-Middle Jurassic sedimentary strata in the major coal accumulating period of the western part of Muri coalfield.The results showed that Mid-Lower Jurassic strata can be divided into four third order sequences.The early-mid Middle Jurassic(the deposition period of sequence 2-3) was the major coal accumulating period in the western part of Muri coalfield,when the strata was deposited in braided river delta plain,delta front and shallow lake,and provenance direction mainly comes from NE.The coal accumulating environment in the early Middle Jurassic is the best of coal-accumulating period,forming the coal accumulating center in Juhugeng.But in the mid Middle Jurassic,the coal accumulating environment was relatively poor,so the coal seams become thin and numerous,and the coal accumulating center moved westward to Xuehuoli and Duosuogongma.All the results showed that the sedimentary facies and paleogeography characteristics have remarkable influence and control on coal-accumulating process.The above understanding provided important guidance to coal exploration and development in the western part of Muri coalfield.关键词
木里煤田/聚煤期/层序地层/层序古地理/聚煤作用Key words
Muri coalfield/coal-accumulating period/sequence stratigraphy/sequence-paleogeography/coal accumulation分类
天文与地球科学引用本文复制引用
张强骅,侯恩科,陈应涛,张发德,鞠崎..木里煤田西部聚煤期层序古地理特征与聚煤作用[J].煤田地质与勘探,2017,45(4):19-25,7.基金项目
国家自然科学基金面上项目(41472234) （41472234）
中国煤炭地质总局科技发展专项(2011-1-03)The General Program of the National Natural Science Foundation of China(41472234) （2011-1-03）
Scientific & Technological and Development Special Project of China National Administration of Coal Geology(2011-1-03) （2011-1-03）
