青海哆嗦公马矿区中侏罗统沉积环境及聚煤规律
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摘要
基于沉积环境与聚煤规律存在着密切的关系,为得出哆嗦公马矿区的聚煤规律,通过实测野外地层剖面及钻孔岩心观察,运用沉积学、煤田地质学的基本理论及方法,研究了哆嗦公马矿区中侏罗世含煤岩系的岩相类型、沉积环境及煤层展布规律。结果表明,该区含煤岩系发育辫状河、辫状河三角洲和湖泊三种沉积环境类型,区域上的厚煤层主要形成于辫状河三角洲沉积环境中。聚煤作用明显受古构造及沉积环境的控制,印支运动控制了侏罗系沉积基底的演化,燕山运动则影响了整个湖盆的发育,此时沿湖泊边缘发育的辫状河三角洲聚煤环境较为发育,从而形成了该区主采煤层下2煤及下1煤。富煤带呈北西-南东向的条带状展布,聚煤中心位于研究区东南部的ZK0-3及ZK11-3钻孔附近。
Based on close relationship existed between sedimentary environment and coal accumulation of coal-bearing strata in Duosuogongma Mining Area,in order to have coal accumulation law in the region,in combination with the data of the field outcrop section and borehole core section,the theory and method of sedimentology and coal geology were applied to analyze the lithofacies,depositional environments,and coal distribution of the Jurassic coal-bearing strata.The results showed that the coal-bearing strata were mainly deposited in the braided river,braided river delta and lake environments,and the thick coal seams were formed in the braided river delta environment.Coal accumulation were controlled by palaeo-tectonics and sedimentary environments.The Indochina Orogeny controlled the evolution of the basement of the Jurassic sedimentary basin,and the Yanshanian Orogeny controlled the development of the coal-forming basins.The braid river delta environments were developed during this stage,which favored the accumulation of two thick coal seams in the middle Jurassic Muli Formation.The coal-rich belt was distributed along the NW—SE direction,where the coal accumulating center was located in the southeastern part,around the Borehole ZK0-3 and ZK 11-3.
Based on close relationship existed between sedimentary environment and coal accumulation of coal-bearing strata in Duosuogongma Mining Area,in order to have coal accumulation law in the region,in combination with the data of the field outcrop section and borehole core section,the theory and method of sedimentology and coal geology were applied to analyze the lithofacies,depositional environments,and coal distribution of the Jurassic coal-bearing strata.The results showed that the coal-bearing strata were mainly deposited in the braided river,braided river delta and lake environments,and the thick coal seams were formed in the braided river delta environment.Coal accumulation were controlled by palaeo-tectonics and sedimentary environments.The Indochina Orogeny controlled the evolution of the basement of the Jurassic sedimentary basin,and the Yanshanian Orogeny controlled the development of the coal-forming basins.The braid river delta environments were developed during this stage,which favored the accumulation of two thick coal seams in the middle Jurassic Muli Formation.The coal-rich belt was distributed along the NW—SE direction,where the coal accumulating center was located in the southeastern part,around the Borehole ZK0-3 and ZK 11-3.
引文
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[5]梁振新,王鲁青,杨成,等.青海省木里煤田哆嗦公马地区煤炭勘探报告[R].西宁:青海煤炭地质勘察院,2012.
[6]岳宏.青海省木里煤田预测区圈定及资源潜力评价[J].中国煤炭地质,2011,23(12):11-14.Yue Hong.Coal resource prediction area delimitation and resource potential evaluation in Muli Coalfield,Qinghai Province[J].Coal Geology of China,2011,23(12):11-14.
[7]邓文诗,张丽霞,成永盛.青海省下中侏罗统含煤岩系沉积特征及聚煤作用[J].中国煤炭地质,2009,21(S2):14-18.Deng Wenshi,Zhang Lixia,Cheng Yongsheng.Coal-bearing strata sedimentary features and coal accumulation processin Lower Middle Series,Jurassic System,Qinghai Province[J].Coal Geology of China,2009,21(S2):14-18.
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[9]文怀军,邵龙义,李永红,等.青海省天峻县木里煤田聚乎更矿区构造轮廓和地层格架[J].地质通报,2011,30(12):1823-1828.Wen Huaijun,Shao Longying,Li Yonghong,et al.Structure and stratigraphy of the Juhugeng Coal Districtat Muli,Tianjun County,Qinghai Province[J].Geological Bulletin of China,2011,30(12):1823-1828.
[10]曹代勇,孙红波,孙军飞.青海东北部木里煤田控煤构造样式与找煤预测[J].地质通报,2010,29(11):1696-1703.Cao Daiyong,Sun Hongbo,Sun Junfei,et al.Coal controlled structural styles and looking for coal resources in Muli Coalfield,northeastern Qinghai,China[J].Geological Bulletin of China,2010,29(11):1696-1703.
[11]陈建洲,徐维成,谢海林,等.木里煤田煤层聚积规律[J].青海大学学报:自然科学版,2010,28(5):42-48.Chen Jianzhou,Xu Weicheng,Xie Hailin,et al.Accumulation rule of a coal seam in Muli Coalfield[J].Journal of Qinghai University:Nature Science,2010,28(5):42-48.
[12]孙军飞,孙红波,张发德,等.青海木里煤田构造分带性特点及赋煤规律[J].中国煤炭地质,2009,21(8):9-11.Sun Junfei,Sun Hongbo,Zhang Fade,et al.Structural zonality and coal hosting pattern in Muri Coalfield,Qinghai[J].Coal Geology of China,2009,21(8):9-11.
[13]孙红波,孙军飞,张发德,等.青海木里煤田构造格局与煤盆地构造演化[J].中国煤炭地质,2009,21(12):34-37.Sun Hongbo,Sun Junfei,Zhang Fade,et al.Structural framework and coal basin tectonic evolution in Muri Coalfield,Qinghai[J].Coal Geology of China,2009,21(12):34-37.
[14]王志峰,张元福,梁雪莉,等.四川盆地五峰组—龙马溪组不同水动力成因页岩岩相特征[J].石油学报,2014,35(4):623-632.Wang Zhifeng,Zhang Yuanfu,Liang Xueli,et al.Characteristics of shale lithofacies formed under different hydrodynamic conditionsinthe Wufeng-Longmaxi Formation,Sichuan Basin[J].Acta Petrolei Sinica,2014,35(4):623-632.
[15]杨创,匡经水,郭超,等.广西十万大山盆地含煤地层发育特征及聚煤研究[J].煤炭科学技术,2015,43(6):116-121.Yang Chuang,Kuang Jingshui,Guo Chao,et al.Study on development features and coal accumulation of coal bearing strata in Shiwan Mountain Foreland Basin of Guangxi[J].Coal Science and Technology,2015,43(6):116-121.
[16]杨辰雨,田景春,陈磊,等.南祁连盆地侏罗系聚煤规律及煤层气分布特征研究[J].煤炭技术,2015,34(2):98-100.Yang Chenyu,Tian Jingchun,Chen Lei,et al.Coal accumulation and distribution characteristics of coalbed methane of Jurassic in southern Qilian Basin[J].Coal Technology,2015,34(2):98-100.
[17]龚文强,张永生,宋天锐,等.南祁连盆地木里凹陷侏罗系烃源岩沉积环境与生烃潜力[J].中国地质,2014,41(1):215-221.Gong Wenqiang,Zhang Yongsheng,Song Tianrui,et al.The evaluation of the hydrocarbon generation potential of source rocks in Muli Depression of southern Qilian Basin[J].Geology in China,2014,41(1):215-221.
[18]张翔,田景春,李祥辉,等.陆相煤系聚煤环境及聚煤特征—以青海祁连山和柴北缘含煤区侏罗系为例[J].煤田地质与勘探,2009,37(6):1-4.Zhang Xiang,Tian Jingchun,Li Xianghui,et al.Coal-accumulating environments and characteristics of inland coalmeasures:a casestudy of Jurassic coal-bearing area in Qilian Mountains and north Qaidam Basin in Qinghai[J].Coal Geology&Exploration,2009,37(6):1-4.
[19]杨致宇,王伟超,邵龙义,等.青海聚乎更矿区三露天井田中侏罗统沉积环境[J].现代地质,2015,29(5):1073-1086.Yang Zhiyu,Wang Weichao,Shao Longyi,et al.Depositional environments of the Middle Jurassic in Sanlutian Mining Field of Juhugeng Mining Area in Qinghai Province[J].Geoscience,2015,29(5):1073-1086.
[20]张发德,张廷江,李焕英.青海省大通河流域侏罗纪含煤地层沉积体系与聚煤作用[J].中国煤田地质,1997,9(2):32-35.Zhang Fade,Zhang Tingjiang,Li Huanying.Sedimentary system and coal accumulation of coal-bearing series of the Datong River Basin,Qinghai Province[J].Coal Geology of China,1997,9(2):32-35.
[21]付修根,廖忠礼,刘建清,等.南羌塘盆地扎仁地区中侏罗统布曲组沉积环境特征及其对油气地质条件的控制作用[J].中国地质,2007,34(4):599-604.Fu Xiugen,Liao Zhongli,Liu Jianqing,et al.Sedimentary environment of the Middle Jurassic Buqu Formation and its controls on petroleum geology in the Zaring Area,southern Qiangtang Basin[J].Geology in China,2007,34(4):599-604.
[22]邵龙义,刘天绩,冉茂云,等.吐哈盆地早侏罗世八道湾组古环境与聚煤作用分析[J].辽宁工程技术大学学报,2006,25(2):189-191.Shao Longyi,Liu Tianji,Ran Maoyun,et al.Palaeoenvironments and coal accumulation of early Jurassic Badaowan Formation in Turpan-Hami Oil Basin[J].Journal of Liaoning Technical University,2006,25(2):189-191.
[23]王玉林,崔新瑞,王猛,等.常村井田义马组沉积环境与聚煤作用[J].中州煤炭,2005(2):9-10.Wang Yulin,Cui Xinrui,Wang Meng,et al.Sedimentary and coal accumulation of Yima Formation in Changcun Mining Area[J].Zhongzhou Coal,2005(2):9-10.
[24]刘文斌,王浩霖,王征征,等.新疆界梁子煤矿区侏罗系层序地层及聚煤规律分析[J].中州煤炭,2013(7):28-31.Liu Wenbin,Wang Haolin,Wang Zhengzheng,et al.Analysis of sequence stratigraphy and coal-accumulation law of Jurassic in Jieliangzi Mining Area,Xinjiang[J].Zhongzhou Coal,2013(7):28-31.
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