准南地区下二叠统火山岩-沉积岩互层叠置发育模式
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摘要
通过野外露头观测与样品采集,对准南地区下二叠统火山岩-沉积岩互层叠置发育特征和发育模式开展火山岩相学、样品测试和室内综合分析等研究。结果表明:研究区火山岩以基性火山岩(玄武岩)和酸性火山岩(英安斑岩或流纹岩)伴生出现为主要特征,具有双峰式火山岩的岩石组合特征。沉积岩以砾岩、砂砾岩为主,砾石成分主要为火山岩和火山碎屑岩,成分成熟度和结构成熟度均较低。火山岩-沉积岩互层叠置地层序列以玄武岩、英安斑岩与火山角砾岩或砂泥岩互层产出为特征,划分为火山爆发相、次火山岩相、火山喷溢相、冲积扇扇根亚相、冲积扇扇中亚相和冲积扇扇缘亚相6种岩相类型以及中性旋回、中-酸性旋回、沉积旋回和基性火山-沉积旋回4个旋回。在大陆裂谷的背景下,软流圈地幔上涌形成的玄武质岩浆与其底侵下地壳物质发生熔融形成的酸性岩浆混合,形成流纹岩或流纹斑岩、玄武岩,与火山活动间歇期形成的沉积岩互层叠置。
Based on outcrop observation and sample collection in the field,the study of developmental patterns and characteristics of interbedded volcanic and sedimentary rocks in the Lower Permian of Zhunnan area was carried out through volcanic petrographic analysis,sample test and indoor comprehensive analysis. The result shows that the volcanic rocks in this area are mainly composed of basic volcanic rocks(basalt)and its associated acidic volcano rocks(dacite porphyry or rhyolite),which would be present as bimodal volcanic rock combination characteristics. Conglomerates and glutenite are mainly developed in the sedimentary rocks. The main components of the gravel are volcanic rocks and pyroclastic rocks,and their composition maturity and structural maturity are relatively low. The sequence of interbedded volcanic and sedimentary rock strata is characterized by alternation of basalt,dacite porphyry and volcanic breccia or sand and mudstone. Six types of lithofacies can be divided as volcanic eruption facies,subvolcanic facies,volcanic effusive facies,alluvial fan fan-root subfacies,alluvial fan fan-middle subfacies and alluvial fan margin subfacies. Four cycles can be divided as neutral cycle,neutral-acid cycle,sedimentary cycle and basic volcanic sedimentary cycle. Under the structural background of continental rift,the basaltic magma formed by the upwelling asthenosphere mantle is melted with the undercut crustal material to become mixed acidic magma,and thus the rhyolite,rhyolite porphyry and basalt were formed,interbedded with the sedimentary rocks formed during the intermittence period after the volcanic activity.
Based on outcrop observation and sample collection in the field,the study of developmental patterns and characteristics of interbedded volcanic and sedimentary rocks in the Lower Permian of Zhunnan area was carried out through volcanic petrographic analysis,sample test and indoor comprehensive analysis. The result shows that the volcanic rocks in this area are mainly composed of basic volcanic rocks(basalt)and its associated acidic volcano rocks(dacite porphyry or rhyolite),which would be present as bimodal volcanic rock combination characteristics. Conglomerates and glutenite are mainly developed in the sedimentary rocks. The main components of the gravel are volcanic rocks and pyroclastic rocks,and their composition maturity and structural maturity are relatively low. The sequence of interbedded volcanic and sedimentary rock strata is characterized by alternation of basalt,dacite porphyry and volcanic breccia or sand and mudstone. Six types of lithofacies can be divided as volcanic eruption facies,subvolcanic facies,volcanic effusive facies,alluvial fan fan-root subfacies,alluvial fan fan-middle subfacies and alluvial fan margin subfacies. Four cycles can be divided as neutral cycle,neutral-acid cycle,sedimentary cycle and basic volcanic sedimentary cycle. Under the structural background of continental rift,the basaltic magma formed by the upwelling asthenosphere mantle is melted with the undercut crustal material to become mixed acidic magma,and thus the rhyolite,rhyolite porphyry and basalt were formed,interbedded with the sedimentary rocks formed during the intermittence period after the volcanic activity.
引文
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[17]孔垂显,邱子刚,秦军,等.准噶尔盆地西北缘石炭系火山岩储层特征研究[J].特种油气藏,2017,24(6):28-32.KONG Chuixian,QIU Zigang,QIN Jun,et al.Study on the characteristics of Carboniferous volcanic reservoir along the northwestern margin of Junggar Basin[J].Special Oil&Gas Reservoirs,2017,24(6):28-32.
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[19]韩作振,严俊磊,刘辉,等.吉林永吉地区南楼山组火山岩锆石U-Pb年代学及地球化学特征[J].山东科技大学学报:自然科学版,2018,37(1):10-19.HAN Zuozhen,YAN Junlei,LIU Hui,et al.Zircon U-Pb Chronology and geochemical characteristics of volcanic rocks from the Nanloushan formation in Yongji area,Jilin province[J].Journal of Shandong University of Science and Technology:Natural Science,2018,37(1):10-19.
[20]韩作振,李昊,尉鹏飞,等.惠民凹陷商741区沙一段火山岩储层特征[J].山东科技大学学报:自然科学版,2018,37(1):47-59.HAN Zuozhen,LI Hao,WEI Pengfei,et al.Characteristics of volcanic reservoirs in Sha-1 member of the Shang 741 area of Huimin depression[J].Journal of Shandong University of Science and Technology:Natural Science,2018,37(1):47-59.
[2]钱青,王焰.不同构造环境中双峰式火山岩的地球化学特征[J].地质地球化学,1999,27(4):29-32.QIAN Qing,WANG Yan.Geochemical characteristics of bimodal volcanic suites from different tectonic settings[J].Geology-Geochemistry,1999,27(4):29-32.
[3]PEARCE Julian.Trace element characteristics of lavas from destructive plate boundaries[M]//Thorpe R S.Andesites:Orogenic Andesites and Related Rocks.John Wiley and Sons,1982:525-548.
[4]WILSON M.Igneous petrogenesis[M].London:Unwin Hyman,1989:245-285.
[5]赵乐强,秦峰,贾凡建,等.准噶尔盆地南缘晚古生代双峰式火山岩成因机制及其地球动力学背景[J].岩石矿物学杂志,2017,36(2):148-162.ZHAO Leqiang,QIN Feng,JIA Fanjian,et al.Petrogenesis of Late Paleozoic bimodal volcanic rocks on the southern margin of the Junggar Basin and its geodynamic significance[J].Acta Petrologica et Mineralogica,2017,36(2):148-162.
[6]刘建强,陈立辉,钟源,等.小兴安岭逊克地区第四纪高镁安山岩的岩石学、K-Ar年代学及火山地质特征[J].岩石学报,2017,33(1):31-40.LIU Jianqiang,CHEN Lihui,ZHONG Yuan,et al.Petrological,KAr chronological and volcanic geological characteristics of Quaternary Xunke high-Mg#andesites from the Lesser Khingan Range[J].Acta Petrologica Sinica,2017,33(1):31-40.
[7]耳闯,王英民,颜耀敏,等.构造活动盆地层序地层特征与主控因素——以准噶尔盆地克—百地区二叠系为例[J].沉积学报,2009,27(6):1 101-1 108.ER Chuang,WANG Yingmin,YAN Yaomin,et al.Sequence stratigraphy characteristics and main controlling factors of the tectonic active basin:As an example from Permian of the Kebai Area in the northwestern Junggar Basin[J].Acta Sedimentologica Sinica,2009,27(6):1 101-1 108.
[8]舒良树,朱文斌,王博,等.新疆博格达南缘后碰撞期陆内裂谷和水下滑塌构造[J].岩石学报,2005,21(1):25-36.SHU Liangshu,ZHU Wenbin,WANG Bo,et al.The post-collision intracontinental rifting and olitostrome on the southern slope of Bogda Mountains,Xinjiang[J].Acta Petrologica Sinica,2005,21(1):25-36.
[9]刘辰生.塔里木盆地阿克库勒地区三叠系层序地层学与沉积相研究[D].长沙:中南大学,2006.LIU Chensheng.Study of sequence stratigraphy and sedimentary facies of Triassic in Akekule area of Tarim basin[D].Changsha:Central South University,2006.
[10]孙耀庭,李辉,孙超,等.济阳坳陷桩西地区中生界火成岩岩相序列[J].矿物岩石地球化学通报,2015,34(1):120-127.SUN Yaoting,LI Hui,SUN Chao,et al.Petrographic sequence of the Mesozoic igneous rock in the Zhuangxi area,Jiyang depression[J].Bulletin of Mineralogy,Petrology and Geochemistry,2015,34(1):120-127.
[11]谭显春.徐深气田火山岩岩性岩相序列[J].天然气工业,2009,29(8):12-14.TAN Xianchun.Lithologic and lithofacies sequences of volcanic rocks in Xushen gas field[J].Natural Gas Industry,2009,29(8):12-14.
[12]李锦轶.新疆东部新元古代晚期和古生代构造格局及其演变[J].地质论评,2004,50(3):304-322.Ll Jinyi.Late Neoproterozoic and Paleozoic tectonic framework and evolution of Eastern Xinjiang,NW China[J].Geological Review,2004,50(3):304-322.
[13]高斌,穆立华,付兴深,等.南堡1号构造火成岩与断裂发育模式研究[J].中国矿业大学学报,2016,45(5):1 003-1 009.GAO Bin,MU Lihua,FU Xingshen,et al.Evolution pattern of igneous rock and fault in NP1 structure[J].Journal of China University of Mining&Technology,2016,45(5):1 003-1 009.
[14]舒萍,丁日新,曲延明,等.徐深气田火山岩储层岩性岩相模式[J].天然气工业,2007,27(8):23-27.SHU Ping,DING Rixin,QU Yanming,et al.Lithologic and lithofacies patterns of volcanic reservoirs in Xushen gas field[J].Natural Gas Industry,2007,27(8):23-27.
[15]沙绍礼,敖德恩.大理-剑川地区新生代火山岩岩石学特征及火山喷发期研究[J].云南地质,2001,20(4):361-368.SHA Shaoli,AO De’en.A study on the petrographic characteristics and eruption period of the Cenozoic volcanic rock in Dali-Jianchuan area[J].Yunnan Geology,2001,20(4):361-368.
[16]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.
[17]孔垂显,邱子刚,秦军,等.准噶尔盆地西北缘石炭系火山岩储层特征研究[J].特种油气藏,2017,24(6):28-32.KONG Chuixian,QIU Zigang,QIN Jun,et al.Study on the characteristics of Carboniferous volcanic reservoir along the northwestern margin of Junggar Basin[J].Special Oil&Gas Reservoirs,2017,24(6):28-32.
[18]罗鑫,王维,李亮,等.准噶尔盆地C47井区火山岩优质储层预测[J].特种油气藏,2017,24(3):54-58.LUO Xin,WANG Wei,LI Liang,et al.Prediction of fine volcanic reservoirs in C47 Well Field in the Junggar Basin[J].Special Oil&Gas Reservoirs,2017,24(3):54-58.
[19]韩作振,严俊磊,刘辉,等.吉林永吉地区南楼山组火山岩锆石U-Pb年代学及地球化学特征[J].山东科技大学学报:自然科学版,2018,37(1):10-19.HAN Zuozhen,YAN Junlei,LIU Hui,et al.Zircon U-Pb Chronology and geochemical characteristics of volcanic rocks from the Nanloushan formation in Yongji area,Jilin province[J].Journal of Shandong University of Science and Technology:Natural Science,2018,37(1):10-19.
[20]韩作振,李昊,尉鹏飞,等.惠民凹陷商741区沙一段火山岩储层特征[J].山东科技大学学报:自然科学版,2018,37(1):47-59.HAN Zuozhen,LI Hao,WEI Pengfei,et al.Characteristics of volcanic reservoirs in Sha-1 member of the Shang 741 area of Huimin depression[J].Journal of Shandong University of Science and Technology:Natural Science,2018,37(1):47-59.