鄂尔多斯盆地白垩系洛河组风成砂岩地球化学与物源区特征:以靖边县龙洲乡露头为例
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摘要
通过镜下观察,岩石常量元素、稀土微量元素含量测定等手段对鄂尔多斯盆地白垩系洛河组风成砂岩进行实验分析,研究其地球化学和物源区特征。确定洛河组风成砂岩地球化学岩石类型为长石砂岩和亚长石砂岩,沉积物的成熟度较高;物源区为被动大陆边缘构造背景占主导地位的再旋回造山带,并含有大陆岛弧的特性;沉积物母岩为变质岩、沉积岩,并含少量的酸性、中基性岩浆岩;物源区气候寒冷干旱,为氧化环境,化学风化程度低。
The microscopic observation,analysis of major elements,trace and rare earth elements were used to study the geochemical and provenance characteristics of eolian sandstones from Cretaceous Luohe Formation in Ordos Basin. The rock type of eolian sandstones were determined to be arkoses and subarkoses,and the sediments were relatively mature. The provenance was in a recycled orogen dominated by the passive continental margin tectonic background with characteristics of continental arc. The parent rocks of sandstones from the Luohe Formation were confirmed to be metamorphic rocks,sedimentary rocks as well as a small amount of acid and intermediate-basic igneous rocks. The paleoclimate of the provenance was determined to be a cold and arid oxidizing environment with weak chemical weathering.
The microscopic observation,analysis of major elements,trace and rare earth elements were used to study the geochemical and provenance characteristics of eolian sandstones from Cretaceous Luohe Formation in Ordos Basin. The rock type of eolian sandstones were determined to be arkoses and subarkoses,and the sediments were relatively mature. The provenance was in a recycled orogen dominated by the passive continental margin tectonic background with characteristics of continental arc. The parent rocks of sandstones from the Luohe Formation were confirmed to be metamorphic rocks,sedimentary rocks as well as a small amount of acid and intermediate-basic igneous rocks. The paleoclimate of the provenance was determined to be a cold and arid oxidizing environment with weak chemical weathering.
引文
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[2]谢渊,王剑,江新胜,等.鄂尔多斯盆地白垩系沙漠相沉积特征及其水文地质意义[J].沉积学报,2005,23(1):73.XIE Yuan,WANG Jian,JIANG Xin-sheng,et al.Sedimentary characteristics of the Cretaceous desert facies in Ordos Basin and their hydrogeological significance[J].Acta Sedimentologica Sinica,2005,23(1):73.
[3]魏斌,张忠义,杨友运.鄂尔多斯盆地白垩系洛河组至环河华池组沉积相特征研究[J].地层学杂志,2006,30(4):367-372.WEI Bin,ZHANG Zhong-yi,YANG You-yun.Study on the characteristics of sedimentary facies between the Cretaceous Luohe Formation and Huanhe Huachi Formation of Ordos Basin[J].Journal of Stratigraphy,2006,30(4):367-372.
[4]于波,张忠义,刘显阳,等.鄂尔多斯盆地白垩系洛河组至环河华池组砂体展布规律研究[J].地层学杂志,2008,32(3):285-289.YU Bo,ZHANG Zhong-yi,LIU Xian-yang,et al.Study on the distribution law of sandstones between the Cretaceous Luohe Formation and Huanhe Huachi Formation of Ordos Basin[J].Journal of Stratigraphy,2008,32(3):285-289.
[5]齐骅,李国栋.鄂尔多斯盆地志丹群沉积时期的古沙漠盆地体系[J].西北地质科学,1996,17(1):63-90.QI Hua,LI Guo-dong.The systems of paleodesert basins in sedimentary period of Zhidan group,Ordos Basin[J].Northwest Geoscience,1996,17(1):63-90.
[6]杨友运,侯光才,王治华.鄂尔多斯早白垩世自流盆地沉积特征岩性分布与盆地演化[J].兰州大学学报(自然科学版),2006,42(3):25-31.YANG You-yun,HOU Guang-cai,WANG Zhi-hua.Sedimentary characteristics,lithological distribution and evolvement pattern of Early Cretaceous Artesian Basin in Ordos,China[J].Journal of Lanzhou University(Natural Science),2006,42(3):25-31.
[7]肖斌.银额盆地查干凹陷下白垩统巴音戈壁组-苏红图组砂岩地球化学[J].矿物岩石地球化学通报,2014,33(4):517-525.XIAO Bin.Geochemistry of sandstone from Bayingebi Formation and Suhongtu Formation of Lower Cretaceous in Chagan sag of Yin'e Basin[J].Bulletin of Mineralogy,Petrology and Geochemistry,2014,33(4):517-525.
[8]尤丽,刘才,钟佳,等.琼东南盆地西区梅山组海底扇岩相-地球化学特征及源区意义[J].地球科学,2017,42(9):1531-1540.YOU Li,LIU Cai,ZHONG Jia,et al.Petrography geochemistry and source significance of submarine fan from west area of Qiongdongnan Basin[J].Earth Science,2017,42(9):1531-1540.
[9]张建军,牟传龙,周恳恳,等.滇西户撒盆地芒棒组砂岩地球化学特征及物源区和构造背景分析[J].地质学报,2017,91(5):1083-1096.ZHANG Jian-jun,MOU Chuan-long,ZHOU Ken-ken,et al.Geochemical characteristic of sandstones from the Mangbang Formation in the Huasa Basin,western Yuannan,and its constraints on provenances and tectonic setting[J].Acta Geologica Sinica,2017,91(5):1083-1096.
[10]周科.常量元素与微量元素特征在物源分析中的应用[J].辽宁化工,2014,43(4):515-520.ZHOU Ke.Application of the characteristics of major elements and trace elements in provenance analysis[J].Liaoning Chemistry Industry,2014,43(4):515-520.
[11]马英军,刘丛强.化学风化作用中的微量元素地球化学:以江西龙南黑云母花岗岩风化壳为例[J].科学通报,1999,44(22):2433-2437.MA Ying-jun,LIU Cong-qiang.Microelement geochemistry in chemical weathering:take the biotite granite weathering crust in Jiangxilongnan as an example[J].Chinese Science Bulletin,1999,44(22):2433-2437.
[12]Srivastava A K,Khare N,Granulometric analysis of glacial sediments,Schirmacher Oasis,East Antarctica[J].Journal of the Geological Society of India,2009,73(5):609-620.
[13]Herron M M.Geochemical classification of terrigenous sands and shales from core or log data[J].Journal of Sedimentary Research,1988,58(5):820-829.
[14]Taloy S R,McLennan S M.The continental crust:its composition and evolution[M].Oxford:Blackwell Scientific Publication,1985:57-72.
[15]McLennan S M,Hemming S,McDaniel D K,et al.Geochemical approaches to sedimentation,provenance and tectonics[J].Geological Society of America,1993,284:21-40.
[16]Ortega H M,Palomo I,Moresi M,et al.A mineralogical and geochemical approach to establishing a sedimentary model in a passive continental margin[J].Clay Minerals,1991,26(3):389-407.
[17]王丛山,陈文西,单福龙.西藏雄巴地区中新世雄巴组砂岩地球化学特征及对物源区,构造背景的指示[J].地质学报,2016,90(6):1195-1207.WANG Cong-shan,CHEN Wen-xi,SHAN Fu-long.Geochemical characteristic of the Xungba Formation sandstones in the Xungba Basin,Tibet and its constraints on provenance and tectonic setting[J].Acta Geologica Sinica,2016,90(6):1195-1207.
[18]Dickinson W R.Interpreting detrital modes of graywacke and arkose[J].Journal of Sedimentary Petrology,1970,40(2):695-707.
[19]陈斌,李勇,王伟明,等.晚三叠世龙门山前陆盆地须家河组物源及构造背景分析[J].地质学报,2016,90(5):857-876.CHEN Bin,LI Yong,WANG Wei-ming,et al.Provenance and tectonic background analysis of Xujiahe Formation of Late Triassic in Longmenshan foreland basin[J].Acta Geologica Sinica,2016,90(5):857-876.
[20]Bhatia M R.Plate tectonics and geochemical composition of sandstones:a reply[J].The Journal of Geology,1985,93:85-87.
[21]Roser B P,Korsch R J.Determination of tectonic setting of sandstone-mudstone suites using Si O2content and K2O/Na2O ratio[J].The Journal of Geology,1986,94(5):635-650.
[22]Bhatia M R.Plate tectonics and geochemical composition of sandstones[J].The Journal of Geology,1983,91(6):611-627.
[23]Bhatia M R,Crook K A W.Trace element characteristics of greywackes and tectonic setting discrimination of sedimentary basins[J].Contributions to Mineralogy and Petrology,1986,92(2):181-193.
[24]闫小雄.鄂尔多斯中生代盆地古物源分析与沉积环境格局恢复:硕士学位论文[D].西安:西北大学,2001.YAN Xiao-xiong.Paleosource analysis and recoverment of deposit environment frame of Ordos Basin in Mesozoic:master's degree thesis[D].Xi'an:Northwest University,2001.
[25]袁卫国,赵一鸣.鄂尔多斯南部地区早古生代被动大陆边缘特征与演化[J].西北大学学报,1996,26(5):451-454.YUAN Wei-guo,ZHAO Yi-ming.Characteristics and evolution of passive continental margin during Early Palaeozoic Era in southern Ordos[J].Journal of Northwest University,1996,26(5):451-454.
[26]冉起贵,陈发景.中国克拉通古隆起的形成,演化及与油气的关系[J].现代地质,1997,11(4):478-487.RAN Qi-gui,CHEN Fa-jing.The relationship between formation and development and oil gas in Chinese craton Palaeohigh[J].Geoscience,1997,11(4):478-487.
[27]王志维,陈刚,李睿,等.鄂尔多斯盆地伊陕斜坡东北部榆林地区中生代沉降史分析[J].石油地质与工程,2009,23(3):1-5.WANG Zhi-wei,CHEN Gang,LI Rui,et al.Mesozoic deposit history analysis southeastern Yulin area of Yishan slope in Ordos Basin[J].Petroleum Geology and Engineering,2009,23(3):1-5.
[28]Nesbitt H W,Young G M.Early Proterozoic climates and plate motions inferred from major element chemistry of Lutites[J].Nature,1982,299:715-717.
[29]Van de Kamp P C,Leake B E.Petrography and geochemistry of feldspathic and mafic sediments of the northeastern Pacific margin[J].Edinburgh Earth Science,1985,76(4):411-449.
[30]Fedo C M,Nesbitt H W,Young G M.Unraveling the effects of potassium metasomatism in sedimentary rocks and paleosols,with implications for paleoweathering conditions and provenance[J].Geology,1995,23(10):921-924.
[31]McLennan S M,Hemming S,McDaniel D K,et al.Geochemical approaches to sedimentation,provenance and tectonics[J].Geological Society of America,1993,284(Spe.):21-40.
[32]Allegre C T,Minster J F.Quantitative models of trace element behavior in magmatic processes[J].Earth Plant Science Letters,1978,38(1):1-25.
[33]Bhatia M R.Rare earth element geochemistry of Australian Paleozoic graywackes and mudrocks:provenance and tectonic control[J].Sedimentary Geology,1985,45(1):97-11.
[34]Cox R,Lowe D R,Cullers R L.The influence of sediment recycling and basement composition on evolution of mudrock chemistry in the southwestern United States[J].Geochimica Et Cosmochimica Acta,1995,59(14):2919-2940.
[35]Potter P E,Maynar D J B,Depetris P J.Mud and mudstones[M].Berlin:Springer Heidelberg,2005:297.
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