山东黄县盆地古近系李家崖组含煤岩系沉积相特征及演化
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摘要
山东黄县盆地是中国东部一个重要的煤和油页岩共生盆地,古近系李家崖组是盆地主要的含煤岩系发育层段。根据层序地层学理论,建立了古近系层序地层格架;依据钻测井、岩心资料划分了李家崖组的沉积相类型,编制了分体系域的沉积相图。主要结论如下:(1)李家崖组发育湖泊、辫状河三角洲以及扇三角洲3种沉积相类型。(2)层序Ⅰ低水位体系域以辫状河三角洲相为主,湖扩展体系域以扇三角洲相和湖泊相为主,高水位体系域以扇三角洲相为主;层序Ⅱ低水位体系域以辫状河三角洲相为主,湖扩展体系域以扇三角洲相和湖泊相为主,高水位体系域以湖泊相为主。(3)层序Ⅰ发育时期:低水位期盆地初始形成—湖扩展期盆地扩张—高水位期盆地萎缩;层序Ⅱ发育时期:低水位期盆地再次缓慢扩张—湖扩展期盆地加速扩张—高水位期盆地萎缩消亡。
Huangxian Basin in Shandong Province is an important basin rich in coal and oil shale in eastern China. The Paleogene Lijiaya Formation is the main strata of coal-bearing rock series in the basin.According to the theory of sequence stratigraphy,the sequence stratigraphic framework of the Paleogene was established. Based on drilling,logging and core data,the sedimentary facies of the Lijiaya Formation were classified,and sedimentary facies maps of different system tracts of the Lijiaya Formation were compiled.Main conclusions are as follows: (1) Sedimentary facies of lake,braided fluvial delta and fan delta were developed in the Lijiaya Formation. (2) In sequenceⅠ,the lowstand system tract mainly developed braided fluvial delta facies,the lake extension system tract mainly developed fan delta facies and lacustrine facies,and the highstand system tract mainly developed fan delta facies. In sequence Ⅱ,the lowstand system tract mainly developed braided fluvial delta facies,the lake extension system tract mainly developed fan delta facies and lacustrine facies,the hightstand system tract mainly developed lacustrine facies. (3) During the depositional stage of the sequence Ⅰ,the basin experienced the formation period in the lowstand system tract,the expansion period in the lake extension system tract and the shrink period in the highstand system tract. During the depositional stage of the sequence Ⅱ,the basin experienced slow expansion period in the lowstand system tract,the expansion period in the lake extension system tract and the shrink period in the hightstand system tract.
Huangxian Basin in Shandong Province is an important basin rich in coal and oil shale in eastern China. The Paleogene Lijiaya Formation is the main strata of coal-bearing rock series in the basin.According to the theory of sequence stratigraphy,the sequence stratigraphic framework of the Paleogene was established. Based on drilling,logging and core data,the sedimentary facies of the Lijiaya Formation were classified,and sedimentary facies maps of different system tracts of the Lijiaya Formation were compiled.Main conclusions are as follows: (1) Sedimentary facies of lake,braided fluvial delta and fan delta were developed in the Lijiaya Formation. (2) In sequenceⅠ,the lowstand system tract mainly developed braided fluvial delta facies,the lake extension system tract mainly developed fan delta facies and lacustrine facies,and the highstand system tract mainly developed fan delta facies. In sequence Ⅱ,the lowstand system tract mainly developed braided fluvial delta facies,the lake extension system tract mainly developed fan delta facies and lacustrine facies,the hightstand system tract mainly developed lacustrine facies. (3) During the depositional stage of the sequence Ⅰ,the basin experienced the formation period in the lowstand system tract,the expansion period in the lake extension system tract and the shrink period in the highstand system tract. During the depositional stage of the sequence Ⅱ,the basin experienced slow expansion period in the lowstand system tract,the expansion period in the lake extension system tract and the shrink period in the hightstand system tract.
引文
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许圣传,董清水,闫丽萍,于文斌,杜江峰,厚刚福.2006.山东黄县断陷盆地油页岩特征及生成机制.吉林大学学报(地球科学版),36(6):954-958.[Xu S C,Dong Q S,Yan L P,Yu W B,Du J F,Hou G F.2006.The characteristics and the formation mechanism of the oil shale in Huangxian Faulted Basin,Shandong Province.Journal of Jilin University(Earth Science Edition),36(6):954-958]
张绍鑫.1987.黄县煤田黄县组含煤岩系的沉积特征和环境.山东矿业学院学报,15(2):128-136.[Zhang S X.1987.The sedimentary characteristic and sedimentary environment of the Huangxian Formation in Huangxian Coalfield.Journal of Shandong University of Science and Technology,15(2):128-136]
LüD W,Wang D D,Li Z X,Liu H Y,Li Y.2017.Depositional environment,sequence stratigraphy and sedimentary mineralization mechanism in the coal bed and oil shale-bearing succession:A case from the Paleogene Huangxian Basin of China.Journal of Petroleum Science and Engineering,148(6):32-51.
李增学,魏久传,兰恒星,李守春.1999.山东黄县早第三纪断陷盆地低水位和扩张体系域聚煤作用分析.沉积学报,17(2):82-86.[Li Z X,Wei J C,Lan H X,Li S C.1999.Coal accumulation in the lowstand and highstand systems tracts in the Huangxian Paleogene Faulted Basin,Shandong.Acta Sedimentologica Sinica,17(2):82-86]
李增学,魏久传,兰恒星,韩美莲,李守春.2000.黄县早第三纪断陷盆地高分辨率层序地层划分.中国煤田地质,12(1):10-13.[Li ZX,Wei J C,Lan H X,Han M L,Li S J.2000.The high-resolution sequence division in Paleogene Faulted Basin of Huangxian.Coal Geology of China,12(1):10-13]
刘承雨.2015.黄县盆地西部油页岩沉积特征与成矿机理研究.中国矿业大学硕士学位论文,1-64.[Liu C Y.2015.Study on Oil Shale Sedimentary Characteristic and Metallogenic Mechanism in Western Huangxian Basin.China University of Mining Master Degree Thesis,1-64]
王炳山,余继峰,孙玉壮,李明月.2001.黄县盆地褐煤与油页岩的泥炭沼泽类型分析.煤田地质与勘探,29(5):1-3.[Wang B S,Yu JF,Sun Y Z,Li M Y.2001.Analysis on peat swamp types from Huangxian Tertiary brown coal and oil shale bearing basin.Coal Geology of Exploration,29(5):1-3]
魏久传,李增学,李守春.2000.黄县断陷盆地充填演化与煤聚积规律.中国矿业大学学报,29(3):78-83.[Wei J C,Li Z X,Li S C.2000.Basin-filling evolution and coal accumulation in Huangxian Faulted Basin.Journal of China University of Mining&Technology,29(3):78-83]
许圣传,董清水,闫丽萍,于文斌,杜江峰,厚刚福.2006.山东黄县断陷盆地油页岩特征及生成机制.吉林大学学报(地球科学版),36(6):954-958.[Xu S C,Dong Q S,Yan L P,Yu W B,Du J F,Hou G F.2006.The characteristics and the formation mechanism of the oil shale in Huangxian Faulted Basin,Shandong Province.Journal of Jilin University(Earth Science Edition),36(6):954-958]
张绍鑫.1987.黄县煤田黄县组含煤岩系的沉积特征和环境.山东矿业学院学报,15(2):128-136.[Zhang S X.1987.The sedimentary characteristic and sedimentary environment of the Huangxian Formation in Huangxian Coalfield.Journal of Shandong University of Science and Technology,15(2):128-136]
LüD W,Wang D D,Li Z X,Liu H Y,Li Y.2017.Depositional environment,sequence stratigraphy and sedimentary mineralization mechanism in the coal bed and oil shale-bearing succession:A case from the Paleogene Huangxian Basin of China.Journal of Petroleum Science and Engineering,148(6):32-51.