周倩羽,邵龙义,陈照雄,李明彬,李浩然
ZHOU Qianyu,SHAO Longyi,CHEN Zhaoxiong,LI Mingbin,LI Haoran

• 1:中国矿业大学(北京)地球科学与测绘工程学院
• 2:四川省煤田地质局一三七队

摘要(Abstract)：

利用钻孔岩心、野外露头、测井等资料,对四川盆地东部金刚矿区上三叠统须家河组层序-古地理及聚煤特征进行研究。根据地层颜色突变面、河流下切谷冲刷面以及沉积相转换面3种典型层序界面,将研究区须家河组划分为4个三级层序,其中层序III对应须家河组四段和五段,层序IV对应须家河组六段和七段,以三级层序为作图单元,恢复了各层序的古地理格局,主要的古地理单元为曲流河和河流三角洲,物源为东南侧的江南古陆;层序IV的聚煤作用明显优于层序III,湖侵体系域更有利于成煤;层序III的煤层多发育在下三角洲平原分流间湾沉积中,层序IV的煤层主要发育于曲流河的岸后沼泽。
Sequence-paleogeography and coal-accumulating characteristics of the Late Triassic Xujiahe Formation in Jingang mining area of eastern Sichuan basin were studied based on the data from outcrops, borehole cores, and geophysical logging. According to the color discontinuity surface of strata, basal erosional surfaces of the incised valley filled with sandstone and the vertical facies reversal surface, four third-order sequences were subdivided in Xujiahe Formation, in which sequence III and sequence IV representing the coal-bearing members in the study area, were corresponding respectively to the intervals from member 4 to member 5 and from member 6 to member 7. Taking the third order sequences as the mapping unit, we have reconstructed the lithofacies-paleogeography pattern of sequence III and sequence IV. During deposition of sequence III and sequence IV, the main paleogeographical units were the meandering river and fluvial delta, with Jiangnan Oldland to the east as the major provenance. The mineable coal seams were mainly developed in the transgressive systems tract(TST), with relatively thick coals in sequence IV. The coal in sequence III was deposited in the interdistributary bay of the lower delta plain environment and the coal in sequence IV was formed in the back swamp of the meandering river environment.

关键词(KeyWords)： 金刚矿区;上三叠统;须家河组;层序地层;古地理;聚煤特征
Jingang mining area;Upper Triassic;Xujiahe Formation;sequence stratigraphy;palaeogeography;coal-accumulating characteristics

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项课题(2016ZX05027-001);; 河南省生物遗迹与成矿过程重点实验室2013-2014年度开放课题(OTMP1408)~~

作者(Author): 周倩羽,邵龙义,陈照雄,李明彬,李浩然
ZHOU Qianyu,SHAO Longyi,CHEN Zhaoxiong,LI Mingbin,LI Haoran

参考文献(References)：

• [1]毛琼,郑荣才,邹光富,等.川东北前陆盆地上三叠统沉积相及沉积演化[J].沉积与特提斯地质,2012,32(1):1-11.MAO Qiong,ZHENG Rongcai,ZOU Guangfu,et al.Upper Triassic sedimentary facies and sedimentary evolution in the northeastern Sichuan foreland basin[J].Sedimentary Geology and Tethyan Geology,2012,32(1):1-11.
• [2]李英娇,阳伟,邵龙义,等.四川盐源晚三叠世煤系沉积环境与层序地层[J].煤田地质与勘探,2014,42(2):1-8.LI Yingjiao,YANG Wei,SHAO Longyi,et al.Sedimentary environments and sequence stratigraphy of Late Triassic coal-bearing strata in Yanyuan area,Sichuan Province[J].Coal Geology&Exploration,2014,42(2):1-8.
• [3]LI Yingjiao,SHAO Longyi,ERIKSSON K A,et al.Linked sequence stratigraphy and tectonics in the Sichuan continental foreland basin,Upper Triassic Xujiahe Formation,southwest China[J].Journal of Asian Earth Sciences,2014,88:116-136.
• [4]朱如凯,白斌,刘柳红,等.陆相层序地层学标准化研究和层序岩相古地理:以四川盆地上三叠统须家河组为例[J].地学前缘,2011,18(4):131-143.ZHU Rukai,BAI Bin,LIU Liuhong,et al.Research on standardization of continental sequence stratigraphy and palaeogeography:A case study from the Upper Triassic Xujiahe formation in Sichuan basin[J].Earth Science Frontiers,2011,18(4):131-143.
• [5]鲁静,邵龙义,冉隆明,等.宝鼎盆地晚三叠世煤系层序地层与聚煤规律[J].煤田地质与勘探,2008,36(6):1-6.LU Jing,SHAO Longyi,RAN Longming,et al.A sequence stratigraphic analysis and coal accumulation of Late Triassic coal measures in the Baoding basin[J].Coal Geology&Exploration,2008,36(6):1-6.
• [6]郑荣才,李国辉,常海亮,等.四川盆地东部上三叠统须家河组层序-岩相古地理特征[J].中国地质,2015,42(4):1024-1036.ZHENG Rongcai,LI Guohui,CHANG Hailiang,et al.Sedimentary sequence and paleogeographic characteristics of the Upper Triassic Xujiahe formation ineastern Sichuan basin[J].Geologyin China,2015,42(4):1024-1036.
• [7]高彩霞,邵龙义,李长林,等.四川盆地东部上三叠统须家河组层序地层及聚煤特征研究[J].古地理学报,2009,11(6):689-696.GAO Caixia,SHAO Longyi,LI Changlin,et al.Sequence stratigraphy and coal accumulation of the Upper Triassic Xujiahe formation in eastern Sichuan basin[J].Journal of Palaeo-geography,2009,11(6):689-696.
• [8]盘昌林,刘树根,马永生,等.川东北须家河组储层特征及主控因素[J].西南石油大学学报(自然科学版),2011,33(3):27-34.PAN Changlin,LIU Shugen,MA Yongsheng,et al.Reservoir characteristics and main controlling factors of the Xujiahe Formation in northeastern Sichuan basin[J].Journal of Southwest Petroleum University(Science&Technology Edition),2011,33(3):27-34.
• [9]田继军,姜在兴,李熙喆,等.川西前陆盆地上三叠统层序地层学研究[J].天然气工业,2008,28(2):30-33.TIAN Jijun,JIANG Zaixing,LI Xizhe,et al.Sequence stratigraphy of Upper Triassic in western Sichuan foreland basin[J].Natural Gas Industry,2008,8(2):30-33.
• [10]童崇光,胡受权.龙门山山前带北段油气远景评价[J].成都理工学院学报,1997,24(2):1-8.TONG Chongguang,HU Shouquan.Prospective value of oil and gas in the foothill belt of the north Longmen Mountains[J].Journal of Chengdu University of Technology,1997,24(2):1-8.
• [11]邵龙义,鲁静,汪浩,等.中国含煤岩系层序地层学研究进展[J].沉积学报,2009,27(5):904-912.SHAO Longyi,LU Jing,WANG Hao,et al.Developments of coal measures sequence stratigraphy in China[J].Acta Sedimentologica Sinica,2009,27(5):904-912.
• [12]魏魁生,徐怀大,雷怀玉,等.非海相层序地层学:以松辽盆地为例[M].北京:地质出版社,1996:1-114.
• [13]AITKEN J F,FLINT S S.The application of high resolution sequence stratigraphy to fluvial systems:A case study from the Upper Carbonif-erous Breathitt Group,eastern Kentucky,USA[J].Sedimentology,1995,42(1):3-30.
• [14]鲁静,邵龙义,刘天绩,等.柴北缘鱼卡地区侏罗纪含煤地层层序地层学研究[J].煤田地质与勘探,2007,35(1):1-6.LU Jing,SHAO Longyi,LIU Tianji,et al.A sequence stratigraphic analysis of the Jurassic coal measures in Yuqia region of Northern Qaidam basin[J].Coal Geography&Exploration,2007,35(1):1-6.
• [15]崔秉荃,龙学明,李元林.川西拗陷的沉降与龙门山的崛起[J].成都地质学院学报,1991,18(1):39-45.CUI Bingquan,LONG Xueming,LI Yuanli.The subsidence of western Sichuan depression and the rise of Longmenshan Mountains[J].Journal of Chengdu College of Geology,1991,18(1):39-45.
• [16]屈红军,马强,董云鹏,等.大巴山前陆盆地晚三叠世—侏罗纪沉积中心的迁移及古流向[J].石油与天然气地质,2009,30(5):584-588.QU Hongjun,MA Qiang,DONG Yunpeng,et al.Migration of the Late Triassic-Jurassic depocenter and paleocurrent direction in the Dabashan for elandbasin[J].Oil&Gas Geology,2009,30(5):584-588.
• [17]STACH E,MACKOWSKY M T,TEICHMULLER M,et al.Stach's Textbook of Coal Petrology[M].Berlin Stuttgart:Gebrüder Borntrager,1982:4-13.
• [18]AITKEN J F,FLINT S S.The application of high resolution sequen-cestratigraphy to fluvial systems:a case study from the Upper Carboniferous Breathitt Group,Eastern Kentucky,USA[J].Sedimentology,1995,42:3-30.

文章评论(Comment)：