黑龙江东部林口地区下白垩统穆棱组砾岩的成因及其意义
摘要
大三江地区是中国东部重要的油气资源接替区,早白垩世时期该地区曾为一个统一的盆地,之后盆地遭受破坏分解。如何确定当时的盆地边界进而恢复盆地原型,是该地区亟待解决的关键地质问题之一。前人对盆地边界的确定大都以理论推测为主,缺乏实际证据。本次工作在黑龙江林口地区发现一套穆棱组底部砾岩,对砾石进行成分及分选特征、沉积特征等的统计与分析,结合古水流恢复和地震解释资料,认为该套砾岩整体为冲积扇相,以河道砾岩沉积和漫流砾岩沉积为主,物源主要来自盆地西部的张广才岭。结合地震资料分析,认为研究区穆棱组时期的沉积模型为冲积扇相向滨浅湖亚相的直接过渡。本研究不仅为大三江盆地西部边界的确定提供了直接证据,同时也为该地区今后的油气勘探指明了方向。
Great Sanjiang region is an important oil and gas resources succeeding district in eastern China.During the Early Cretaceous period,this region was once a unified lake basin,and then broken up.The problem as to the determination of the basin boundary and the reconstruction of the basin prototype is one of the key geological problems in this region.Previous study on the basin boundary was mainly focused on theoretical speculation and seemed lack of actual evidence.In this study,a set of conglomerates was found at the bottom of Muling Formation in Linkou basin.Based on an analysis of gravel composition and sorting as well as sedimentary characteristics,combined with the paleocurrent recovery and seismic data interpretation,the authors have concluded that the set of conglomerate is on the whole of alluvial fan facies,the river conglomerate deposition and overflow conglomerate deposition constitute the dominant depositions,and the provenance mainly came from the Zhangguangcai Mountain in the west of the basin.Combined with the seismic data analysis,it is held that the deposition model of the study area was the direct transition from the alluvial fan to the shallow lake subfacies in the period of Muling Formation.This study not only provides direct evidence for the determination of the western border of the Great Sanjiang Basin,but also points out the direction for the future oil and gas exploration in this region.
Great Sanjiang region is an important oil and gas resources succeeding district in eastern China.During the Early Cretaceous period,this region was once a unified lake basin,and then broken up.The problem as to the determination of the basin boundary and the reconstruction of the basin prototype is one of the key geological problems in this region.Previous study on the basin boundary was mainly focused on theoretical speculation and seemed lack of actual evidence.In this study,a set of conglomerates was found at the bottom of Muling Formation in Linkou basin.Based on an analysis of gravel composition and sorting as well as sedimentary characteristics,combined with the paleocurrent recovery and seismic data interpretation,the authors have concluded that the set of conglomerate is on the whole of alluvial fan facies,the river conglomerate deposition and overflow conglomerate deposition constitute the dominant depositions,and the provenance mainly came from the Zhangguangcai Mountain in the west of the basin.Combined with the seismic data analysis,it is held that the deposition model of the study area was the direct transition from the alluvial fan to the shallow lake subfacies in the period of Muling Formation.This study not only provides direct evidence for the determination of the western border of the Great Sanjiang Basin,but also points out the direction for the future oil and gas exploration in this region.
引文
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[21]张云鹏,任建业,侯艳平,等.黑龙江东部大三江盆地群城子河组和穆棱组时期重矿物特征及物源分析[J].岩石矿物学杂志,2011,30(4):674-682.
[22]李锦轶,牛宝贵,宋彪,等.长白山北段地壳的形成与演化[M].北京:地质出版社,1999:110-114.
[23]孙家振,李兰斌.地震地质综合解释教程[M].武汉:中国地质大学出版社,2002:121-129.
[2]贾承造,郑民.东北白垩纪大三江盆地沉积构造演化及其残留盆地群的油气勘探意义[J].大庆石油学院学报,2010,34(6):1-12.
[3]何玉平.黑龙江省东部早白垩世沉积特征与原型盆地恢复[D].长春:吉林大学博士学位论文,2006.
[4]和钟铧,刘招君,陈秀艳,等.黑龙江省东部残留盆地群早白垩世沉积相特征及演化[J].古地理学报,2008,10(2):151-158.
[5]孙革,郑少林,姜剑红,等.黑龙江鸡西含煤盆地早白垩世生物地层研究新进展[J].煤田地质与勘探,1999,27(6):1-3.
[6]沙金庚.黑龙江东部早白垩世生物地层学研究的主要进展[J].地学前缘,2002,9(3):95-101.
[7]任凤和,杨晓平,李仰春,等.黑龙江省东部鸡西群地层时代划分及地质意义[J].中国地质,2005,32(1):48-54.
[8]李仰春,杨晓平,周兴福,等.黑龙江省东部鸡西群与龙爪沟群综合地层对比研究[J].中国地质,2006,33(6):1312-1320.
[9]于恩君.黑龙江省鸡西-勃利含煤盆地层序地层学讨论[J].吉林地质,2008,(2):8-13.
[10]杨晓平,李仰春,柳震,等.黑龙江东部鸡西盆地构造层序划分与盆地动力学演化[J].吉林大学学报(地球科学版),2005,35(5):616-621.
[11]和钟铧,刘招君,张晓冬,等.黑龙江东部晚中生代盆地群构造层划分及构造沉积演化[J].世界地质,2009,28(1):20-27.
[12]程三友.中国东北地区区域构造特征与中、新生代盆地演化[D].北京:中国地质大学(北京)博士学位论文,2006.
[13]温泉波,刘永江,韩国卿,等.黑龙江东部盆地群中、新生代构造演化[J].世界地质,2008,(4):370-377.
[14]张兴洲,马志红.黑龙江东部中—新生代盆地演化[J].地质与资源,2010,(3):191-196.
[15]周建波,张兴洲,马志红,等.中国东北地区的构造格局与盆地演化[J].石油与天然气地质,2009,30(5):530-538.
[16]孙卫东,凌明星,汪方跃,等.太平洋板块俯冲与中国东部中生代地质事件[J].矿物岩石地球化学通报,2008,27(3):218-225.
[17]赵澄林,朱筱敏.沉积岩石学[M].北京:石油工业出版社,2001:93-98.
[18]赵永胜,陈布科,赵锡奎,等.云南陇川盆地东南缘新第三系砾岩成因及沉积模型[J].成都理工学院学报,1994,21(2):35-41.
[19]侯景涛,程日辉,王璞珺,等.松辽盆地东南缘六台地区下白垩统营城组二段砾岩沉积特征及成因模型[J].吉林大学学报(地球科学版),2007,37(6):1176-1181.
[20]赵学钦,杨树锋,陈汉林,等.中国黑龙江东部鸡西盆地白垩纪多期砾岩特征及古地理意义[J].北京大学学报(自然科学版),2012,48(3):1-14.
[21]张云鹏,任建业,侯艳平,等.黑龙江东部大三江盆地群城子河组和穆棱组时期重矿物特征及物源分析[J].岩石矿物学杂志,2011,30(4):674-682.
[22]李锦轶,牛宝贵,宋彪,等.长白山北段地壳的形成与演化[M].北京:地质出版社,1999:110-114.
[23]孙家振,李兰斌.地震地质综合解释教程[M].武汉:中国地质大学出版社,2002:121-129.
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