贵州DH地区上二叠统层序地层及聚煤作用分析
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摘要
基于煤田地质勘查成果,研究贵州DH地区晚二叠世层序地层、沉积相及聚煤规律。对该地区上二叠统含煤岩系(宣威组)进行了高分辨率层序地层分析,以区域不整合面为层序界面,并结合厚煤层标志层以及岩性的特征,将该地区上二叠统含煤岩系划分为一个海侵体系域和一个低水位体系域。探讨沉积相格架下煤层厚度的变化规律,在建立该地区层序地层格架的基础上,划分出潮坪—潟湖沉积相,并进行聚煤作用分析。
Based on coalfield geological exploration results,the late Permian sequence stratigraphy,sedimentary facies and coal accumulation pattern have been studied. The high-resolution sequence stratigraphy analysis is carried out about Upper Permian coal-bearing rocks( Xuanwei Formation) in the coalfield. Taking the regional unconformity surface as the sequence boundary interface,the Upper Permian coal-bearing rocks in coalfields are divided into a transgressive system tract and a lowstand system tract,based on the characteristics of thick coal seam marked strata and lithology. The variation rule of coal seam thickness under sedimentary framework is studied. Based on the establishment of the sequence stratigraphic framework in this area,the tidal flat-lagoon sedimentary facies are divided and coal accumulation analyzed.
Based on coalfield geological exploration results,the late Permian sequence stratigraphy,sedimentary facies and coal accumulation pattern have been studied. The high-resolution sequence stratigraphy analysis is carried out about Upper Permian coal-bearing rocks( Xuanwei Formation) in the coalfield. Taking the regional unconformity surface as the sequence boundary interface,the Upper Permian coal-bearing rocks in coalfields are divided into a transgressive system tract and a lowstand system tract,based on the characteristics of thick coal seam marked strata and lithology. The variation rule of coal seam thickness under sedimentary framework is studied. Based on the establishment of the sequence stratigraphic framework in this area,the tidal flat-lagoon sedimentary facies are divided and coal accumulation analyzed.
引文
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[2]纪友亮,张世奇,张宏.层序地层学原理及层序成因机制模式[M].北京:地质出版社,1998:1-8.
[3]朱筱敏.层序地层学[M].北京:石油大学出版社,2000:1-10.
[4]陈建强,王训练,于炳松,等.层序地层与地层界线优化[J].地层学杂志,2001,25(4):241-246.
[5]胡盛,李科花,陈良立.平顶山煤田层序地层格架的建立及煤层分布规律研究[J].中国井矿盐,2014(5):20-24.
[6]陈江峰,许亚坤,邵龙义,等.云南富源一带晚二叠世层序地层与聚煤作用分析[J].中国煤炭,2010,36(7):88-91.
[7]张翔,田景春,彭军.塔里木盆地下志留统塔塔埃尔塔格组沉积体系及沉积模式[J].沉积学报,2006,24(3):370-377.
[8]魏垂高,张世奇,孙杰,等.塔里木盆地塔中地区志留系潮坪沉积体系研究[C]∥全国“地学与资源”研究生学术论坛. 2005:135-142.
[9]金高峰,龚绍礼,张春晓,等.聚煤作用的层序模式[J].煤田地质与勘探,2000,28(1):1-5.
[10]郭立君,邵龙义,洪愿进,等.黔西织纳煤田上二叠统层序地层及聚煤作用[J].古地理学报,2011,13(5):493-500.
[2]纪友亮,张世奇,张宏.层序地层学原理及层序成因机制模式[M].北京:地质出版社,1998:1-8.
[3]朱筱敏.层序地层学[M].北京:石油大学出版社,2000:1-10.
[4]陈建强,王训练,于炳松,等.层序地层与地层界线优化[J].地层学杂志,2001,25(4):241-246.
[5]胡盛,李科花,陈良立.平顶山煤田层序地层格架的建立及煤层分布规律研究[J].中国井矿盐,2014(5):20-24.
[6]陈江峰,许亚坤,邵龙义,等.云南富源一带晚二叠世层序地层与聚煤作用分析[J].中国煤炭,2010,36(7):88-91.
[7]张翔,田景春,彭军.塔里木盆地下志留统塔塔埃尔塔格组沉积体系及沉积模式[J].沉积学报,2006,24(3):370-377.
[8]魏垂高,张世奇,孙杰,等.塔里木盆地塔中地区志留系潮坪沉积体系研究[C]∥全国“地学与资源”研究生学术论坛. 2005:135-142.
[9]金高峰,龚绍礼,张春晓,等.聚煤作用的层序模式[J].煤田地质与勘探,2000,28(1):1-5.
[10]郭立君,邵龙义,洪愿进,等.黔西织纳煤田上二叠统层序地层及聚煤作用[J].古地理学报,2011,13(5):493-500.