首页|通柘煤田二叠系含煤地层岩相古地理特征及其演化规律研究

通柘煤田二叠系含煤地层岩相古地理特征及其演化规律研究

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为了进一步认识和理解通柘煤田二叠系的成煤环境和富煤带的分布及控制因素,通过综合地质分析,对二叠系岩相古地理进行了恢复,共编制出7张反映不同旋回时期特征的岩相古地理图.结果表明:MSC1的古地理单元有辫状河河道、曲流河河道、天然堤、泥炭沼泽、分流间湾洼地;区内主要煤层位于MSC1基准面由上升转为下降的阶段,即最大海泛面位置处;此时正处于大规模海进转海退的时期,海平面缓慢下降,研究区形成了以河流作用为主的三角洲平原,在曲流河河道两侧形成了大面积的泥炭沼泽,研究区内全区发育了煤田范围内厚度最大、可采性最好的二1煤层.
Study on lithofacies and paleogeography characteristics and evolution regularity of Permian coal-bearing strata in Tongzhe Coalfield
In order to further understand and comprehend the distribution and control factors of coal-forming environment and coal rich zone of the Permian in the Tongzhe Coalfield,comprehensive geological analysis to restore the lithofacies and paleogeography of the Per-mian was conducted,and seven lithofacies and paleogeography maps reflecting the characteristics of different cycle periods were com-piled.The results indicate that the paleogeographic units of MSC1 include braided river channels,meandering river channels,natural embankments,peat swamps,and distributary bay depressions.The main coal seams in the area are located in the stage where the MSC1 benchmark level changes from rising to falling,that is,at the position of the largest flooding surface.At this time,it is in a period of large-scale sea advance and regression,with sea levels slowly decreasing.The study area has formed a delta plain mainly affected by riv-er action,and a large area of peat swamps have been formed on both sides of the meandering river channel.Therefore,the study area has developed the largest thickness and best mining ability of the Ⅱ 1 coal seam within the coalfield range.

Tongzhe CoalfieldPermian stratacoal-controlling factorslithofacies and paleogeographycoal accumulation law

石志衍、史小卫、吴会永、陈俊侠、刘秋红、李宏禹、时文勇

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河南省地质研究院,河南郑州 450016

河南省资源环境调查二院有限公司,河南洛阳 471000

通柘煤田 二叠系地层 控煤因素 岩相古地理 聚煤规律

河南省大气污染防治专项资金项目河南省地质研究院地质科技攻关项目河南省地质研究院地质科技攻关项目河南省地质研究院地质科技攻关项目河南省地质研究院地质科技攻关项目

豫财环资[2020]9号2024-331-XM2023-331-XM022-KT042023-331-XM026-KT022023-331-XM022-KT03

2024

10.19389/j.cnki.1003-0506.2024.06.023

能源与环保
河南省煤炭科学研究院有限公司 河南省煤炭学会

能源与环保

CSTPCD
影响因子：0.221
ISSN：1003-0506
年,卷(期)：2024.46(6)
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