安徽巢湖平顶山P-T界面元素地球化学特征及地质意义
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摘要
对安徽巢湖平顶山地区二叠系大隆组与三叠系殷坑组界面附近(P-T界面)的17件岩石样品进行地球化学研究表明:(1)研究区大隆组沉积岩主要来源于后太古宙上陆壳的沉积岩、长英质岩石,殷坑组的沉积岩来源为后太古宙上陆壳的沉积岩,有部分基性组分的加入。(2)殷坑组地层样品成分变异指数(ICV)值表明为活动大陆边缘首次直接沉积的产物;大隆组地层ICV值指示大隆组样品的成熟度较高,为稳定构造环境下沉积的产物,可能经历了一定程度的再循环而发生均一化。殷坑组样品化学蚀变指数CIA值表明经历了寒冷、干燥条件下的弱的化学风化作用。大隆组样品CIA值指示经历了经历了炎热、潮湿条件下的强烈的化学风化作用。(3)本区殷坑组沉积岩可能形成于被动大陆边缘-活动大陆边缘过渡构造环境下,大隆组沉积物源区主要以大陆岛弧-活动大陆边缘构造环境为主。
The geochemical characteristics of the samples from the P-T interface of the Pingdingshan area of Chaohu,Anhui Province show that the protolith of Dalong formation in the study area are mainly sedimentary rocks and felsic rocks from the continental crust in the post-Archaean,the protolith of Yinkeng formation are mainly sedimentary rocks from the continental crust in the post-Archaean with the addition of some basic rocks.The composition variation index(ICV)values of Yinkeng goup samples shows that the product the first deposition in active continental margin.The ICV values of Dalong formation indicating that the maturity of the samples from Dalong formation is higher.It's the product of stable tectonic environment deposit,may experienced recycle and homogenization.The mean value of the chemical alteration index of Yinkeng formation samples indicating the source material may have experienced a cold,dry conditions of weak chemical weathering.The CIA mean value of Dalong formation samples indicates that the source material has undergone strong chemical weathering in warm-hot,humidity condition.The tectonic setting of sedimentary rocks of Yinkeng formation may be the transition between the passive continental margin and the active continental margins.The source material of Dalong formation may be formed in the tectonic setting of the continental island arc-active continental margins.
The geochemical characteristics of the samples from the P-T interface of the Pingdingshan area of Chaohu,Anhui Province show that the protolith of Dalong formation in the study area are mainly sedimentary rocks and felsic rocks from the continental crust in the post-Archaean,the protolith of Yinkeng formation are mainly sedimentary rocks from the continental crust in the post-Archaean with the addition of some basic rocks.The composition variation index(ICV)values of Yinkeng goup samples shows that the product the first deposition in active continental margin.The ICV values of Dalong formation indicating that the maturity of the samples from Dalong formation is higher.It's the product of stable tectonic environment deposit,may experienced recycle and homogenization.The mean value of the chemical alteration index of Yinkeng formation samples indicating the source material may have experienced a cold,dry conditions of weak chemical weathering.The CIA mean value of Dalong formation samples indicates that the source material has undergone strong chemical weathering in warm-hot,humidity condition.The tectonic setting of sedimentary rocks of Yinkeng formation may be the transition between the passive continental margin and the active continental margins.The source material of Dalong formation may be formed in the tectonic setting of the continental island arc-active continental margins.
引文
[1]彭元桥,殷鸿福,杨逢清.陆相二叠系—三叠系界线研究进展[J].地球科学进展,2001,16(6):769-776.PENG Yuan-qiao,YIN Hong-fu,YANG Feng-qing.Advance in the study of terrestrial permian-triassic boundary[J].Advance In Earth Sciences,2001,16(6):769-776.
[2]黄午兴,何明友,王红军,等.四川峨眉山地区二叠系与三叠系界线微量元素地球化学研究[J].甘肃地质,2009,18(2):25-31.HUANG Wu-xing,HE Ming-you,Wang Hong-jun,et al.Tudy of trace element geochemistry of permian-triassic boundary in Emei Mountain,Sichuan[J].Gansu Geology,2009,18(2):25-31.
[3]张克信,童金南,殷鸿福,等.浙江长兴二叠系—三叠系界线剖面层序地层研究[J].地质学报,1996,70(3):270-281.Zhang Kexin,Tong Jinnan,Yin Hongfu,et al.Sequence stratigraphy of the Permian-triassic boundary section of Changxing,Zhejiang[J].Acta Geologica Sinica,1996,70(3):270-281.
[4]郑宽兵,邓军,李浩,等.二叠系—三叠系界线研究[J].现代地质,2004,18(4):564-571.ZHENG Kuan-bing,DENG Jun,LI Hao,et al.The drowned unconformities between permian and triassicin the dianqiangui basin and its adjacent areas[J].Geoscience,2004,18(4):564-571.
[5]周刚,郑荣才,罗平,等.川东华蓥二叠系-三叠系界线地层地质事件与元素地球化学响应[J].地球科学——中国地质大学学报,2012,37(增刊):101-110.Zhou Gang,Zheng Rong-cai,LuoPing,et al.Geological events and therir geochemical responses of the permian-triassic boundary,Huaying,Eastern Sichuan[J].Earth Science-Journal of China University of Geosciences,2012,37:101-110.
[6]甘媛,于林松,何明友,等.川北江油—广元一带二叠系—三叠系界线黏土岩稀土元素地球化学特征及其地质意义[J].地质通报,2008,27(3):380-387.Gan Y,Yu L S,He M Y,Zhang Y,et al.REE geochemistry of claystone at the Permian-Triassic boundary in the JiangyouGuangyuan area,nor thern Sichuan,China and its geological implications[J].Geological Bulletin of China,2008,27(3):380-387.
[7]胡作维,黄思静,郜晓勇,等.川东华蓥山二叠系/三叠系界线附近黏土层中黏土矿物的类型及成因[J].地质通报,2008,27(3):374-379.Hu Z W,Huang S J,Gao X Y,et al.Clay minerals in the clay beds near the Permian/Tr iassic boundary at Huaying Mountain,eastern Sichuan,China:Their types and origin[J].Geological Bulletin of China,2008,27(3):374-379.
[8]彭兴芳,冯庆来,李周波,等.广西东攀二叠系-三叠系界线剖面地球化学高分辨率旋回研究[J].中国科学D辑(地球科学),2007,37(12):1565-1570.Peng xingfang,Feng qinglai,Li zhoubo.The high resolution cyclic stratigraphy and geochemistry research of the Permian-Triassic boundary in the Dongpan,Guangxi[J].Science China Press,2007,37(12):1565-1570.
[9]杨逢清,殷鸿福,喻建新,等.贵州威宁岔河陆相二叠系-三叠系界线地层研究[J].中国科学D辑(地球科学),2005,36(5):219-529.Yang pangqing,Yin hongfu,Yu jianxin.The stratigraphy research of the Permian-Triassic boundary in the Chahe,Weining,Guizhou[J].Earth Science,2005,36(5):219-529.
[10]张素新,喻建新,杨逢清,等.黔西滇东地区浅海、滨海及海陆交互相二叠系—三叠系界线附近黏土岩研究[J].矿物岩石,2004,24(4):81-86.ZHAN G SU-xin,YU Jian-xin,YANG Feng-qing.Study on clayrocks of the neritic,littoral and marine-terrigenous facies across the permiantriassic boundary in the Eastern Yunnan And Western Guizhou,South China[J].J M In Eral Pe Trol,2004,24(4):81-86.
[11]张素新,赵来时,童金南,等.湖北兴山大峡口浅海相二叠系—三叠系界线附近黏土岩研究[J].矿物岩石,2007,27(3):94-100.ZHA NG Su-xin,ZHAO Lai-Shi,TONG Jin-Nan,et al.Study on the claystone near the permian-triassic boundary from the Daxiakou Section,Xingshan,Hubei Province[J].J M In Eral Pe Trol,2007,27(3):94-100.
[12]殷鸿福.二叠系一三叠系研究的进展[J].地球科学进展,1994,9(2):1-10.Yin hongfu,Advancements of permianand triassic research[J].Advance In Earth Science,1994,9(2):1-10.
[13]王道轩,宋传中,金福全,等.巢湖地学实习教程[M].合肥:合肥工业大学出版社,2005.WAMG Daoxuan,SONG Chuanzhong,JIN Fuquan,et al.The Geology Practice of Chaohu[M].Hefei:The Press of Hefei University of Technology,2005.
[14]左景勋,童金南,邱海鸥,等.巢湖平顶山北坡剖面早三叠世碳、氧同位素地层学研究[J].地球科学-中国地质大学学报,2004,28(1):35-47.ZUO Jing-xun,TONG Jin-nan,QIU Hai-ou.Carbon and oxygen isotope stratigraphy of the lower triassic at northern Pingdingshan section of Chaohu,Anhui Province,China[J].Earth Science,2004,28(1):35-47.
[15]周鼎武,胡绍祥.地质野外实践教学教程[M].徐州:中国矿业大学出版社,2010:194-195.Zhou dingwu,Hu shaoxiang.The Geology Practice in the Wild[M].Xuzhou:The Press of China University of Mining and Technology,2010:194-195.
[16]彭军,伊海生,夏文杰.湘黔桂地区晚前寒武纪层状硅质岩地球化学特征及成因[J].地质地球化学,1999,27(4):33-39.PENG Jun,YI Haisheng,XIA Wenjie.Origin and geochemical characteristics of late precambrian bedded silicalites in Hunan,Guizhou And Guangxi[J].Geology-Geochemistry,1999,27(4):33-39.
[17]杨恩林,陈恨水,陈焕,等.黔东留茶坡组硅质岩元素地球化学特征与形成环境[J].矿物学报,2011,31(3):406-411.YANG En-lin,CHEN Hen-shui,CHEN Huan,et al.Elemental geochemistry and sedimentary environment of the liuchapo siliceous rocks in Songtao-Cengong-Sandu,Eastern Guizhou Province[J].Acta Mineralogica Sinica,2011,31(3):406-411.
[18]Baltuck M.Provenance and distribution of tethyan Pelagic and hemipelagic siliceous sediments,pindos Mountains,Greece[J].Sedimentary Geology,1982,31(1):63-88.
[19]Adachi M,Yamamoto K,Sugisaki R.Hydrothermal chert and associated siliceous rocks from the Northern Pacific,their geological significance as indication of ocean ridge activity[J].Sedimentary Geology,1986,47(1-2):125-148.
[20]雷卞军,阙洪培,胡宁,等.鄂西古生代硅质岩的地球化学特征及沉积环境[J].沉积与特提斯地质,2002,22(2):70-79.LEI Bian-jun,QUEHong-pei,HUNing.Geochemistry and sedimentary environments of the Palaeozoic siliceous rocks in western Hubei[J].Sedimentary Geology and Tethyan Geology,2002,22(2):70-79.
[21]刘艳青,杨忠芳,赖木收.辽西中生代沉积岩稀土、微量元素地球化学特征及其构造背景[J].地质评论,2006,52(4):450-458.LIU Yanqing,YANG Zhongfang,Lai Mushou.Geochemical characteristics of REE and trace elements of mesozoic sedimentary rocks and its tectonic setting in western Liaoning[J].Geological Review,2006,52(4):450-458.
[22]McLennan S M,Taylor S R.Sedimentary rocks and crustal evolution:Tectonic setting and secular[J].The Journal of Geology,1991,99:1-21.
[23]Taylor S R,McLennan S M.The Continental Crust:Its Composition and Evolution[M].Oxford:Blackwell,1985:1-205.
[24]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.
[25]Shaw D M.A review of K-Rb fractionation trends by covariance analysis[J].Geochimica et Cosmochimica Acta,1968,32(6):573-602.
[26]van de Kamp P C,Leake B E.Petrography and geochemistry of feldspathic and mafic sediments of the northeastern Pacific margin[J].Transactions of the Royal Society of Edinburgh:Earth Science,1985,76(4):411-499.
[27]Nesbitt H W,Young G M.Early Proterozoic climates and plate motions inferred from major element chemistry of lutites[J].Nature,1982,299(5885):715-717.
[28]姚纪明,于炳松,陈建强,等.中扬子北缘上侏罗统—白垩系沉积岩地球化学特征与构造背景分析[J].地球化学,2009,38(3):231-241.Yao jiming,Yu bingsong,Chen jianqiang.The geochemical characteristics of the Upper Jurassic to Cretaceous sedimentary in north margin of the mid-Yangtze and tectonic setting discrimination[J].Geochimica,2009,38(3):231-241.
[29]蔡观强,郭峰,刘显太,等.沾化凹陷新近系沉积岩地球化学特征及其物源指示意义[J].地质科技情报,2007,26(6):17-24.CAI Guan-qiang,GUO Feng,LIU Xian-tai.Geochemical characteristics of neogene sedimentary rocks from Zhanhua Sag and its implication for provenance[J].Geological Science and Technology Information,2007,26(6):17-24.
[30]Bhatia M R,Crook K.Race element characteristics of greywackes and tectonic setting discrimination of sedimentary basins[J].Contributions to Mineralogy Petrology,1986,92:181-193.
[2]黄午兴,何明友,王红军,等.四川峨眉山地区二叠系与三叠系界线微量元素地球化学研究[J].甘肃地质,2009,18(2):25-31.HUANG Wu-xing,HE Ming-you,Wang Hong-jun,et al.Tudy of trace element geochemistry of permian-triassic boundary in Emei Mountain,Sichuan[J].Gansu Geology,2009,18(2):25-31.
[3]张克信,童金南,殷鸿福,等.浙江长兴二叠系—三叠系界线剖面层序地层研究[J].地质学报,1996,70(3):270-281.Zhang Kexin,Tong Jinnan,Yin Hongfu,et al.Sequence stratigraphy of the Permian-triassic boundary section of Changxing,Zhejiang[J].Acta Geologica Sinica,1996,70(3):270-281.
[4]郑宽兵,邓军,李浩,等.二叠系—三叠系界线研究[J].现代地质,2004,18(4):564-571.ZHENG Kuan-bing,DENG Jun,LI Hao,et al.The drowned unconformities between permian and triassicin the dianqiangui basin and its adjacent areas[J].Geoscience,2004,18(4):564-571.
[5]周刚,郑荣才,罗平,等.川东华蓥二叠系-三叠系界线地层地质事件与元素地球化学响应[J].地球科学——中国地质大学学报,2012,37(增刊):101-110.Zhou Gang,Zheng Rong-cai,LuoPing,et al.Geological events and therir geochemical responses of the permian-triassic boundary,Huaying,Eastern Sichuan[J].Earth Science-Journal of China University of Geosciences,2012,37:101-110.
[6]甘媛,于林松,何明友,等.川北江油—广元一带二叠系—三叠系界线黏土岩稀土元素地球化学特征及其地质意义[J].地质通报,2008,27(3):380-387.Gan Y,Yu L S,He M Y,Zhang Y,et al.REE geochemistry of claystone at the Permian-Triassic boundary in the JiangyouGuangyuan area,nor thern Sichuan,China and its geological implications[J].Geological Bulletin of China,2008,27(3):380-387.
[7]胡作维,黄思静,郜晓勇,等.川东华蓥山二叠系/三叠系界线附近黏土层中黏土矿物的类型及成因[J].地质通报,2008,27(3):374-379.Hu Z W,Huang S J,Gao X Y,et al.Clay minerals in the clay beds near the Permian/Tr iassic boundary at Huaying Mountain,eastern Sichuan,China:Their types and origin[J].Geological Bulletin of China,2008,27(3):374-379.
[8]彭兴芳,冯庆来,李周波,等.广西东攀二叠系-三叠系界线剖面地球化学高分辨率旋回研究[J].中国科学D辑(地球科学),2007,37(12):1565-1570.Peng xingfang,Feng qinglai,Li zhoubo.The high resolution cyclic stratigraphy and geochemistry research of the Permian-Triassic boundary in the Dongpan,Guangxi[J].Science China Press,2007,37(12):1565-1570.
[9]杨逢清,殷鸿福,喻建新,等.贵州威宁岔河陆相二叠系-三叠系界线地层研究[J].中国科学D辑(地球科学),2005,36(5):219-529.Yang pangqing,Yin hongfu,Yu jianxin.The stratigraphy research of the Permian-Triassic boundary in the Chahe,Weining,Guizhou[J].Earth Science,2005,36(5):219-529.
[10]张素新,喻建新,杨逢清,等.黔西滇东地区浅海、滨海及海陆交互相二叠系—三叠系界线附近黏土岩研究[J].矿物岩石,2004,24(4):81-86.ZHAN G SU-xin,YU Jian-xin,YANG Feng-qing.Study on clayrocks of the neritic,littoral and marine-terrigenous facies across the permiantriassic boundary in the Eastern Yunnan And Western Guizhou,South China[J].J M In Eral Pe Trol,2004,24(4):81-86.
[11]张素新,赵来时,童金南,等.湖北兴山大峡口浅海相二叠系—三叠系界线附近黏土岩研究[J].矿物岩石,2007,27(3):94-100.ZHA NG Su-xin,ZHAO Lai-Shi,TONG Jin-Nan,et al.Study on the claystone near the permian-triassic boundary from the Daxiakou Section,Xingshan,Hubei Province[J].J M In Eral Pe Trol,2007,27(3):94-100.
[12]殷鸿福.二叠系一三叠系研究的进展[J].地球科学进展,1994,9(2):1-10.Yin hongfu,Advancements of permianand triassic research[J].Advance In Earth Science,1994,9(2):1-10.
[13]王道轩,宋传中,金福全,等.巢湖地学实习教程[M].合肥:合肥工业大学出版社,2005.WAMG Daoxuan,SONG Chuanzhong,JIN Fuquan,et al.The Geology Practice of Chaohu[M].Hefei:The Press of Hefei University of Technology,2005.
[14]左景勋,童金南,邱海鸥,等.巢湖平顶山北坡剖面早三叠世碳、氧同位素地层学研究[J].地球科学-中国地质大学学报,2004,28(1):35-47.ZUO Jing-xun,TONG Jin-nan,QIU Hai-ou.Carbon and oxygen isotope stratigraphy of the lower triassic at northern Pingdingshan section of Chaohu,Anhui Province,China[J].Earth Science,2004,28(1):35-47.
[15]周鼎武,胡绍祥.地质野外实践教学教程[M].徐州:中国矿业大学出版社,2010:194-195.Zhou dingwu,Hu shaoxiang.The Geology Practice in the Wild[M].Xuzhou:The Press of China University of Mining and Technology,2010:194-195.
[16]彭军,伊海生,夏文杰.湘黔桂地区晚前寒武纪层状硅质岩地球化学特征及成因[J].地质地球化学,1999,27(4):33-39.PENG Jun,YI Haisheng,XIA Wenjie.Origin and geochemical characteristics of late precambrian bedded silicalites in Hunan,Guizhou And Guangxi[J].Geology-Geochemistry,1999,27(4):33-39.
[17]杨恩林,陈恨水,陈焕,等.黔东留茶坡组硅质岩元素地球化学特征与形成环境[J].矿物学报,2011,31(3):406-411.YANG En-lin,CHEN Hen-shui,CHEN Huan,et al.Elemental geochemistry and sedimentary environment of the liuchapo siliceous rocks in Songtao-Cengong-Sandu,Eastern Guizhou Province[J].Acta Mineralogica Sinica,2011,31(3):406-411.
[18]Baltuck M.Provenance and distribution of tethyan Pelagic and hemipelagic siliceous sediments,pindos Mountains,Greece[J].Sedimentary Geology,1982,31(1):63-88.
[19]Adachi M,Yamamoto K,Sugisaki R.Hydrothermal chert and associated siliceous rocks from the Northern Pacific,their geological significance as indication of ocean ridge activity[J].Sedimentary Geology,1986,47(1-2):125-148.
[20]雷卞军,阙洪培,胡宁,等.鄂西古生代硅质岩的地球化学特征及沉积环境[J].沉积与特提斯地质,2002,22(2):70-79.LEI Bian-jun,QUEHong-pei,HUNing.Geochemistry and sedimentary environments of the Palaeozoic siliceous rocks in western Hubei[J].Sedimentary Geology and Tethyan Geology,2002,22(2):70-79.
[21]刘艳青,杨忠芳,赖木收.辽西中生代沉积岩稀土、微量元素地球化学特征及其构造背景[J].地质评论,2006,52(4):450-458.LIU Yanqing,YANG Zhongfang,Lai Mushou.Geochemical characteristics of REE and trace elements of mesozoic sedimentary rocks and its tectonic setting in western Liaoning[J].Geological Review,2006,52(4):450-458.
[22]McLennan S M,Taylor S R.Sedimentary rocks and crustal evolution:Tectonic setting and secular[J].The Journal of Geology,1991,99:1-21.
[23]Taylor S R,McLennan S M.The Continental Crust:Its Composition and Evolution[M].Oxford:Blackwell,1985:1-205.
[24]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.
[25]Shaw D M.A review of K-Rb fractionation trends by covariance analysis[J].Geochimica et Cosmochimica Acta,1968,32(6):573-602.
[26]van de Kamp P C,Leake B E.Petrography and geochemistry of feldspathic and mafic sediments of the northeastern Pacific margin[J].Transactions of the Royal Society of Edinburgh:Earth Science,1985,76(4):411-499.
[27]Nesbitt H W,Young G M.Early Proterozoic climates and plate motions inferred from major element chemistry of lutites[J].Nature,1982,299(5885):715-717.
[28]姚纪明,于炳松,陈建强,等.中扬子北缘上侏罗统—白垩系沉积岩地球化学特征与构造背景分析[J].地球化学,2009,38(3):231-241.Yao jiming,Yu bingsong,Chen jianqiang.The geochemical characteristics of the Upper Jurassic to Cretaceous sedimentary in north margin of the mid-Yangtze and tectonic setting discrimination[J].Geochimica,2009,38(3):231-241.
[29]蔡观强,郭峰,刘显太,等.沾化凹陷新近系沉积岩地球化学特征及其物源指示意义[J].地质科技情报,2007,26(6):17-24.CAI Guan-qiang,GUO Feng,LIU Xian-tai.Geochemical characteristics of neogene sedimentary rocks from Zhanhua Sag and its implication for provenance[J].Geological Science and Technology Information,2007,26(6):17-24.
[30]Bhatia M R,Crook K.Race element characteristics of greywackes and tectonic setting discrimination of sedimentary basins[J].Contributions to Mineralogy Petrology,1986,92:181-193.