松辽盆地古中央隆起带基岩锆石U-Pb年龄及其地质意义
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摘要
升深10井位于松辽盆地古中央隆起带北部,其揭示的基岩岩性为英安岩、碎裂蚀变凝灰岩夹绢云母板岩等,地质录井上对其年代归属存在较大分歧。选用当前年代地质学中广泛应用的锆石U-Pb定年方法,测定该套火山岩、火山碎屑岩夹浅变质岩的地质年龄。研究表明:所选测年样品来自其中的安山岩,所选测年锆石阴极发光图像显示岩浆生长成因的振荡环带,锆石测年结果显示两组谐和年龄,加权平均年龄分别为(255.4±2.6)Ma和(282.5±2.8)Ma;这两组火山岩的同位素年龄与大兴安岭地区二叠纪时期发生的两期(早二叠世大石寨期、晚二叠世林西期)火山喷发事件在时间上和空间上均具有很好的一致性,为二叠纪时期"佳—蒙地块"与华北板块、古亚洲洋板块相互作用的产物;255.4 Ma为英安岩结晶年龄,升深10井这一套含安山岩的基岩地层时代应属晚二叠世,区域上与林西组层位相当。
Well Shengshen-10 is located in the north part of the Central Uplift of Songliao Basin, and the exposed lithologies by the well for the basement rocks are dacite, cataclastic altered tuff and sandwich sericite slate, there exists rather bigger disputing over the age attribution in the geological mud logging. The age determining method by the zircon U-Pb widely applied in the current time-geology was selected to detect and confirm the geological age of this set of the era volcanic rock, volcanic clastic rock and sandwich epimetamorphic rock. The study shows that the selected samples are from the andesite among the rocks, the selected age-confirming zircon cathodeluminescence(CL) images indicate the oscillatory rings reflecting the magmatogenic feature, the results of the zircon age conformance show that there are two groups of the harmonic age, the weighted average age can be divided into 255.4±2.6 Ma and 282.5±2.8 Ma; there are much better consistency in time and space between the isotope age in these two groups of the volcanic rock and two-period magma eruption events happened in Dashizhai period of Early Permian and Linxi period of Late Permian in Permian Daxing'anling Area, they are the interacted products between Permian "Jia-Meng Block" and North China Block and Paleo-Asian Ocean Plate; 255.4 Ma is the crystallization age of the dacite, the geologic age of this set of andesite-bearing basement rock can be considered as Late Permian in Well Shengshen-10, which is correlated with the time of Linxi Formation in region.
Well Shengshen-10 is located in the north part of the Central Uplift of Songliao Basin, and the exposed lithologies by the well for the basement rocks are dacite, cataclastic altered tuff and sandwich sericite slate, there exists rather bigger disputing over the age attribution in the geological mud logging. The age determining method by the zircon U-Pb widely applied in the current time-geology was selected to detect and confirm the geological age of this set of the era volcanic rock, volcanic clastic rock and sandwich epimetamorphic rock. The study shows that the selected samples are from the andesite among the rocks, the selected age-confirming zircon cathodeluminescence(CL) images indicate the oscillatory rings reflecting the magmatogenic feature, the results of the zircon age conformance show that there are two groups of the harmonic age, the weighted average age can be divided into 255.4±2.6 Ma and 282.5±2.8 Ma; there are much better consistency in time and space between the isotope age in these two groups of the volcanic rock and two-period magma eruption events happened in Dashizhai period of Early Permian and Linxi period of Late Permian in Permian Daxing'anling Area, they are the interacted products between Permian "Jia-Meng Block" and North China Block and Paleo-Asian Ocean Plate; 255.4 Ma is the crystallization age of the dacite, the geologic age of this set of andesite-bearing basement rock can be considered as Late Permian in Well Shengshen-10, which is correlated with the time of Linxi Formation in region.
引文
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[2]冯子辉,霍秋立,王雪,等.青山口组一段烃源岩有机地球化学特征及古沉积环境[J].大庆石油地质与开发,2015,34(4):1-7.FENG Zihui,HUO Qiuli,WANG Xue,et al.Organic geochemical characteristics and paleosedimentary environments of the source rocks in Member 1 of Qingshankou Formation[J].Petroleum Geology & Oilfield Development in Daqing,2015,34(4):1-7.
[3]毛治国,朱如凯,王京红,等.中国沉积盆地火山岩储层特征与油气聚集[J].特种油气藏,2015,22(5):1-8.MAO Zhiguo,ZHU Rukai,WANG Jinghong,et al.Reservoir characteristics and hydrocarbon accumulations of volcanic rocks in sedimentary basins of China[J].Special Oil & Gas Reservoirs,2015,22(5):1-8.
[4]王清海,许文良.松辽盆地形成与演化的深部作用过程:中生代火山岩探针[J].吉林大学学报(地球科学版),2003,33(1):37-42.WANG Qinghai,XU Wenliang.The deep process of formation and evolution of Songliao Basin:Mesozoic volcanic rock probe[J].Journal of Jilin University (Earth Science Edition),2003,33(1):37-42.
[5]夏丹.松辽盆地构造隆幅影响因素及与油气藏形成关系[J].大庆石油地质与开发,2017,36(3):13-17.XIA Dan.Influencing factors of the tectonic uplifts and their relationships with the petroleum accumulation in Songliao Basin[J].Petroleum Geology & Oilfield Development in Daqing,2017,36(3):13-17.
[6]叶得泉,黄清华,张莹,等.松辽盆地白垩纪介形类生物地层学[M].北京:石油工业出版社,2002.YE Dequan,HUANG Qinghua,ZHANG Ying,et al.Cretaceous Ostracoda biostratigraphy in Songliao Basin[M].Beijing:Petroleum Industry Press,2002.
[7]黄清华,吴怀春,万晓樵,等.松辽盆地白垩系综合年代地层学研究新进展[J].地层学杂志,2011,35(3):250-257.HUANG Qinghua,WU Huaichun,WAN Xiaoqiao,et al.New progress of integrated chronostratigraphy of the Cretaceous in Songliao Basin[J].Journal of Stratigraphy,2011,35(3):250-257.
[8]修昊,唐华风,黄露玫.松辽盆地英台断陷沉火山碎屑岩储层特征及控制因素[J].油气地质与采收率,2016,23(3):33-39.XIU Hao,TANG Huafeng,HUANG Lumei.Characteristics and influential factors of sedimentary pyroclastic rocks in Yingtai Faulted Depression,Songliao Basin[J].Petroleum Geology and Recovery Efficiency,2016,23(3):33-39.
[9]张顺.松辽盆地北部地层学与沉积学研究进展[J].大庆石油地质与开发,2015,34(3):1-8.ZHANG Shun.Research progresses of the stratigraphy and sedmentology for North Songliao Basin[J].Petroleum Geology & Oilfield Development in Daqing,2015,34(3):1-8.
[10]刘永江,张兴洲,金巍,等.东北地区晚古生代区域构造演化[J].中国地质,2010,37(4):943-951.LIU Yongjiang,ZHANG Xingzhou,JIN Wei,et al.Late Paleozoic tectonic evolution in Northeast China[J].Geology in China,2010,37(4):943-951.
[11]邢大全,刘永江,唐振兴,等.松辽盆地上古生界构造格局及演化探究[J].世界地质,2015,34(2):396-407.XING Daquan,LIU Yongjiang,TANG Zhenxing,et al.Research on Upper Paleozoic tectonic framework and evolution of Songliao Basin[J].Global Geology,2015,34(2):396-407.
[12]李福来,曲希玉,刘立,等.内蒙古东北部上二叠统林西组沉积环境[J].沉积学报,2009,27(2):265-272.LI Fulai,QU Xiyu,LIU Li,et al.Sedimentary environment on Upper Permian Linxi Group in Inner Mongolia[J].Acta Sedimentologica Sinica,2009,27(2):265-272.
[13]翟大兴,张永生,田树刚,等.内蒙古林西地区上二叠统林西组沉积环境与演变[J].古地理学报,2015,17(3):359-370.ZHAI Daxing,ZHANG Yongsheng,TIAN Shugang,et al.Sedimentary environment and evolution of the Upper Permian Linxi Formation in Linxi area,Inner Mongolia[J].Journal of Palaeogeography,2015,17(3):359-370.
[14]吴福元,孙德有,李惠民,等.松辽盆地基底岩石的锆石U-Pb年龄[J].科学通报,2000,45(6):656-660.WU Fuyuan,SUN Deyou,LI Huimin,et al.Zircon U-Pb age of basement rocks of Songliao Basin[J].Chinese Science Bulletin,2000,45(6):656-660.
[15]王成文,孙跃武,李宁,等.中国东北及邻区晚古生代地层分布规律的大地构造意义[J].中国科学:D辑地球科学,2009,39(10):1429-1437.WANG Chenwen,SUN Yuewu,LI Ning,et al.Tectonic significance of China and its adjacent areas in Northeast distribution of Late Paleozoic strata[J].Science in China (Serial D,Earth Science),2009,39(10):1429-1437.
[16]高福红,许文良,杨德彬,等.松辽盆地南部基底花岗质岩石锆石LA-ICP-MS U-Pb定年:对盆地基底形成时代的制约[J].中国科学:D辑地球科学,2007,37(3):331-335.GAO Fuhong,XU Wenliang,YANG Debin,et al.Southern Songliao Basin basement granitic rocks zircon LA-ICP-MS U-Pb dating:Age constraints on the formation of basement[J].Science in China (Serial D,Earth Science),2007,37(3):331-335.
[17]樊航宇,李明辰,张全,等.内蒙古西乌旗地区大石寨组火山岩时代及地球化学特征[J].地质通报,2014,33(9):1284-1292.FAN Hangyu,LI Mingchen,ZHANG Quan,et al.Age and geochemical characteristics of the Dashizai Formation volcanic rocks in Xi Ujimqin Banner,Inner Mongolia[J].Geological Bulletin of China,2014,33(9):1284-1292.
[18]张海华,郑月娟,陈树旺,等.大兴安岭南部幸福之路组的时代及二叠—三叠系界线研究:来自凝灰岩LA-ICP-MS锆石U-Pb年龄的证据[J].中国地质,2015,42(6):1754-1764.ZHANG Haihua,ZHENG Yuejuan,CHEN Shuwang,et al.Age of Xingfuzhilu Formation and contact relationship between Permian and Triassic strata in Southern Da Hinggan Mountains:Constraints from the tuff zircon U-Pb ages[J].Geology in China,2015,42(6):1754-1764.
[19]YUAN H L,GAO S,LIU X M,et al.Accurate U-Pb age and trace element determinations of zircon by laser ablation-inductively coupled plasma mass spectrometry[J].Geostandards and Geoanalytical Research,2004,28(3):353-370.
[20]ANDERSEN T.Correction of common lead in U-Pb analyses that do not report 204Pb[J].Chemical Geology,2002,192( 1-2):59-79.
[21]王成文,金巍,张兴洲,等.东北及邻区晚古生代大地构造属性新认识[J].地层学杂志,2008,32(2):119-136.WANG Chenwen,JIN Wei,ZHANG Xingzhou,et al.New conception of the Late Paleozoic tectonics in the Northeastern China and adjacent areas[J].Journal of Stratigraphy,2008,32(2):119-136.
[22]邵济安.中朝板块北缘中段地壳演化[M].北京:北京大学出版社,1991.SHAO Ji’an.Crust evolution in the middle part of the northern margin of Sino-Korean Plate[M].Beijing:Peking University Press,1991.
[23]鲍庆中,张长捷,吴之理,等.内蒙古东南部晚古生代裂谷区花岗质岩石锆石SHRIMP U-Pb定年及其地质意义[J].中国地质,2007,34(5):790-799.BAO Qingzhong,ZHANG Changjie,WU Zhili,et al.Zircon SHRIMP U-Pb dating of granitoids in a Late Paleozoic rift area,Southeastern Inner Mongolia,and its implications[J].Geology in China,2007,34(5):790-799.
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