| 孙亚平,黄培.贵州石场煤炭勘查区含煤地层沉积环境研究[J].贵州地质,2025,42(2):207-215 |
| 贵州石场煤炭勘查区含煤地层沉积环境研究 |
| The Study on Sedimentary Environment of Coal Bearing Strata in Shichang Coal Exploration Area of Guizhou |
| 投稿时间：2025-01-21 |
| DOI： |
| 中文关键词: 沉积环境 聚煤规律 三角洲 石场勘查区 贵州 |
| 英文关键词:Sedimentary environment Coal accumulation law Delta Stone field exploration area Guizhou |
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| 中文摘要: |
| 石场勘查区(以下简称研究区)位于贵州北部，是典型的偏海相沉积环境成煤建造。本文以该区含煤岩系为研究对象，通过对研究区15口煤勘孔钻探数据及相关测井资料进行分析研究，同时开展野外地质调查，运用岩石学、沉积学多学科理论方法，详细分析了该区龙潭组煤系的古沉积环境与煤层发育规律，结果显示:研究区含煤地层可划分为三角洲-潮坪沉积相，涵盖了潮控与河控三角洲平原、前缘亚相及潮坪4种沉积亚相，并识别出区域不整合面(Sb1)、区域海退(Sb2)、海侵面(Sb3)3种层序界面类型，进一步划分为2个三级层序SQ1、SQ2，且均由海侵体系域(TST)和高位体系域(HST)的二元结构构成。据此本文提出了研究区三角洲平原—潮坪成煤模式，认为区内最主要的煤层形成于龙潭期三角洲平原沉积环境。 |
| 英文摘要: |
| The Shichang exploration area( the research area for short)is located in northern Guizhou and is a typical coal-forming formation in a marine sedimentary environmentIn this paper，it takes the coal-bearing rock series in this area as the research object，through analyzing and studying the drilling data and related logging data of 15 coal survey holes in the study area，and conducting field geological surveys，using multi-disciplinary theoretical methods of petrology and sedimentology，the ancient sedimentary environment and coal seam development laws of the Longtan Formation coal measures in this area are analyzed in detailThe results show that:The coal-bearing strata in the study area can be divided into delta-tidal flat sedimentary facies，covering four sedimentary subfacies:tide-controlled and fluvial delta plain，front subfacies and tidal flatThree sequence interface types，regional unconformity surface(Sb1)，regional regressive surface(Sb2)，and transgressive surface(Sb3)，are identified，and are further divided into two third-order sequences SQ1 and SQ2，all of which are composed of the binary structure of transgressive system tract(TST)and highstand system tract(HST)Based on this，this paper proposes a delta-plain-tidal flat coal-forming model in the study area，and believes that the most important coal beds in the area were formed in the delta-plain sedimentary environment of the Longtan Period |
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