阳原泥河湾盆地台儿沟东剖面沉积相磁化率各向异性研究
|
摘要
磁化率各向异性(Anisotropy of Magnetic Susceptibility:AMS)能揭示沉积物中磁性矿物的定向排列,用于判定水流大小和方向变化。目前,关于沉积微相的磁化率各向异性研究仍较少。本文通过对台儿沟东剖面进行高分辨率磁化率各向异性研究,发现各沉积微相和亚相的磁化率各向异性较大差异,对于水动力较大的沉积微相,如分支河道、水下支流河道、河口砂坝等,其磁化率和磁化率各向异性度相对较大;对于水动力较小的沉积微相,如分支间湾、天然堤等,磁化率和磁化率各向异性度次之;对于滨浅湖、前三角洲泥、沼泽等静水环境,磁化率和磁化率各向异性度最小。根据各沉积微相或亚相χ与P的相关系数变化,可将河湖相地层分为两段:其中,在7.8~90m深度范围内,χ与P的相关系数为正值;在之下90~130m深度范围内,χ与P的相关系数主要为负值。与郝家台、东谷坨剖面磁化率各向异性结果相似,台儿沟东剖面各沉积微相和亚相的磁化率最大轴主要倾向NNE和NNW方向,而磁化率最小轴主要倾向SW方向,表明泥河湾盆地的物源除了可能来自盆地东部外,还可能来自盆地西南部。
Anisotropy of magnetic susceptibility( AMS) can reveal preferred alignment of various magnetic minerals and be used for inferring flow velocity and direction. Presently,the study of AMS on sedimentary microfacies is rare. Here we conducted a high-resolution AMS research on sedimentary facies in the eastern Taiergou section and found the facies display different charaters on AMS. For high hydrodynamic sedimentary microfacies,such as river-mouth bar,subaqueous distributary channels,et al.,they have high susceptibility value and anisotropy degree; for lower hydrodynamic sedimentary microfacies,such as inter-distributary bays,natural levee,et al.,they have lower susceptibility value and anisotropy degree; for static-water sedimentary microfacies,such as prodelta,swamps,et al.,they have lowest susceptibility value and anisotropy degree. Based on the χ—P correlation coefficient of microfacies,the section can be divided into two stages. In the depth of 7. 8 ~ 90 m,theirχ—P correlation coefficients are positive,while in the depth of 90 ~ 130 m,theirχ—P correlation coefficients are almost negative. As similar with the result from Haojiatai and Donggutuo section,the maximum susceptibility axes of microfacies in this study are mostly oriented to the NNE and NNW,indicating the material and the water-flow possibly come from east or south-west.
Anisotropy of magnetic susceptibility( AMS) can reveal preferred alignment of various magnetic minerals and be used for inferring flow velocity and direction. Presently,the study of AMS on sedimentary microfacies is rare. Here we conducted a high-resolution AMS research on sedimentary facies in the eastern Taiergou section and found the facies display different charaters on AMS. For high hydrodynamic sedimentary microfacies,such as river-mouth bar,subaqueous distributary channels,et al.,they have high susceptibility value and anisotropy degree; for lower hydrodynamic sedimentary microfacies,such as inter-distributary bays,natural levee,et al.,they have lower susceptibility value and anisotropy degree; for static-water sedimentary microfacies,such as prodelta,swamps,et al.,they have lowest susceptibility value and anisotropy degree. Based on the χ—P correlation coefficient of microfacies,the section can be divided into two stages. In the depth of 7. 8 ~ 90 m,theirχ—P correlation coefficients are positive,while in the depth of 90 ~ 130 m,theirχ—P correlation coefficients are almost negative. As similar with the result from Haojiatai and Donggutuo section,the maximum susceptibility axes of microfacies in this study are mostly oriented to the NNE and NNW,indicating the material and the water-flow possibly come from east or south-west.
引文
陈兴强,迟振卿,闫臻,王永,闵隆瑞,姚培毅,董进,姚杜琳.2012.华北泥河湾盆地郝家台地区的沉积相组合特征:以台儿沟东剖面为例.地学前缘,19(4):227~238,
迟振卿,刘兴起,胡欣,王永,闵隆瑞,刘竹杰.2010.泥河湾盆地井儿洼剖面揭示的47~25ka B.P.期间的气候环境演化.地质学报,7(84):940~947.
刘秀铭,许同春,刘东生.1989.中国黄土磁化率各向异性与成因及其对第四纪研究的意义.中国科学(B辑),4:441~447.
闵隆瑞,张宗祜,王喜生,郑绍华,朱关祥.2006.河北阳原台儿沟剖面泥河湾组底界的确定.地层学杂志,30(2):104~109.
汤英俊,李毅,陈万勇.1995.河北阳原小长梁遗址哺乳类化石及其时代.古脊椎动物学报,33(1):74~83.
王红强.2007.泥河湾盆地东谷坨剖面磁性特征及环境意义.第四纪研究,27(6):1081~1091.
王永,迟振卿,李德贵,闵隆瑞,诸惠燕.2004.泥河湾盆地0.8Ma以来的地磁场相对强度记录.科学通报,49(9):879~882.
卫奇.1994.泥河湾盆地半山早更新世旧石器遗址初探.人类学学报,13(3):223~238.
吴汉宁,岳乐平.1997.风成沉积物磁组构与中国黄土区第四纪风向变化.地球物理学报,40(4):487—494.
夏正楷,刘锡清.1984.泥河湾层古地理环境的初步认识.海洋地质与第四纪地质,4(3):101~110.
谢飞,李琚,刘连强.2006.泥河湾旧石器文化.石家庄:花山文艺出版社,1~278.
杨晓强,李华梅.1999.泥河湾盆地典型剖面沉积物磁化率特征及其意义.海洋地质与第四纪地质,19(1):75~83.
杨晓强,李华梅.2000.陆相断陷湖盆沉积物磁组构特征及环境意义—以泥河湾盆地为例.海洋地质与第四纪地质,20(3):43~52.
张玉芬,李长安,阎桂林.2004.长江中游堤防溃口沉积物的磁组构特征.地质学报,78(3):428~432.
张宗祜,闵隆瑞,朱关祥.2003.河北省阳原台儿沟剖面泥河湾河湖相层岩石地层的划分.地质通报,22(6):379~383.
周庭儒,李华章,刘清泗,李荣全,孙秀平.1991.阳原盆地新生代古地理.科学出版社.北京,1~162.
Ao Hong,Deng Chenglong,Dekkers M J,Liu Qingsong.2010.Magnetic mineral dissolution in Pleistocene fluvio-lacustrinesediments,Nihewan Basin(North China).Earth Planet.Sci.Lett.,292:191~200.
Barbour G B.1924.Preliminary observation in Kalgan area.Bulletin ofthe Geological Society of China,3(2):167~168.
Deng Chenglong,Wei Qi,Zhu Rixiang,Wang Hongqiang,Zhang Rui,Ao Hong,Chang Liao,Pan Yongxin.2006.Magnetostratigraphicage of the Xiantai Paleolithic site in the Nihewan Basin and implications for early human colonization of Northeast Asia.Earth andPlanetary Science Letters,244:336~348.
Deng Chenglong,Xie Fei,Liu Caicai,Ao Hong,Pan Yongxin,ZhuRixiang.2007.Magnetochronology of the Feiliang Paleolithic site inthe Nihewan Basin and implications for early human adaptability tohigh northern latitudes in East Asia.Geophys.Res.Lett.,34:L14301,doi:10.11029/2007GL030335.
Deng Chenglong,Zhu Rixiang,Zhang Rui,Ao Hong,Pan Yongxin.2008.Timing of the Nihewan formation and faunas.QuaternaryResearch,69:77~90.
Dong Jin,Gao Rui,Wang Yong,Zhang Shihong,Yao Peiyi,ChiZhenqing,Zhao Zhili.2013.Magnetic fabric study of late Holocenesediments in Huangqi lake,Inner Mongolia and its sedimentarysignificance,Acta Geologica Sinica(English Edition),87(1):186~196.
Ellwood B B,Ledbetter M T.1977.Antarctic bottom water fluctuationsin the Vema Channel:effects of velocity changes on particlealignment and size.Earth Planet.Sci.Lett.,35:189~198.
Ellwood B B.1975.Analysis of emplacement mode in basalt from deep-sea drilling project holes 319A and 321 using anisotropy ofmagnetic susceptibility.Journal of Geophysical Research,80:4805~4808.
Hamilton N,Rees A L.1970.The use of magnetic fabric in paleocurrentestimation.In:Runcorn S K.eds.Paleogeophysics.London:Academic Press,445~464.
Hrouda F.1982.Magnetic anisotropy of rocks and its application ingeology and geophysics.Surveys in Geophysics,5:37~82.
Jelinek V.1981.Characterization of the magnetic fabric of rocks.Tectonophysics,79:63~67.
Ledbetter M T,Ellwood B B.1980.Spatial and temporal changes inbottom water velocity and direction from analysis of particle size dataand alignment in deep-sea sediment.Marine Geology,38:245-261.
Li Huamei,Yang Xiaoqiang,Heller F,Li Haitao.2008.High resolutionmagnetostratigraphy and deposition cycles in the Nihewan Basin(North China)and their significance for stone artifact dating.Quat.Res.,69:250~262.
Park C K,Doh S J,Suk D W,Kim K H.2000.Sedimetnary fabric ondeep-sea sediments from KODOS area in the eastern Pacific.Marine Gelogy,171:115-126.
Ree A L,Woodall W A.1975.The magnetic fabric of some laboratorydeposited sediments.Earth and Planetary Science Letters,25:121-130.
Schneider J L,Pollet N,Chapron E,Wessels M,Wassmer P.2004.Signature of Rhine Valley sturzstrom dam failures in Holocenesediments of Lake Constance,Germany.Sedimentary Geology,169:75-91.
Tarling D H,Hrouda F.1993.The magnetic anisotropy of rocks.London:Chapman&Hall,1~218.
Wang Hongqiang,Deng Chenglong,Zhu Rixiang,Wei Qi,Hou Yamei,Boeda E.2005.Magnetostratigraphic dating of the Donggutuo andMaliang Paleolithic sites in the Nihewan Basin,North China.Quat.Res.,64:1~11.
Wang Xisheng,Lvlie R,Su Pu,Fan Xingzhao.2008.Magneticsignature of environmental change reflected by Pleistocene lacustrinesediments from the Nihewan Basin,North China.Palaeogeogr.,Palaeoclimatol.,Palaeoecol.,260:452~462.
Wassmer P,Schneider J L,Fonfrege A V,Lavigne F,Paris R,Gomez.2010.Use of anisotropy of magnetic susceptibility(AMS)in thestudy of tsunami deposits:Application to the 2004 deposits on theeastern coast of Banda Aceh,North Sumatra,Indonesia.Marinegeology,275:255-272.
Zhu R X,Hoffman K A,Potts R,Deng C L,Pan Y X,Guo B,Shi CD,Guo Z T,Yuan B Y,Hou Y M,Huang W W.2001.Earliestpresence of humans in northeast Asia.Nature,413:413-417.
Zhu Rixiang,Liu Qingsong,Jackson M J.2004a.Paleoenvironmentalsignificance of the magnetic fabrics in Chinese loess-paleosols sincethe last interglacial(<130 Ka).Earth and Planetary ScienceLetters,221:55~59.
Zhu R X,Potts R,Xie F,Hoffman K A,Deng C L,Shi C D,Pan Y X,Wang H Q,Shi R P,Wang Y C,Shi G H,Wu N Q.2004b.Newevidence on the earliest human presence at high northern latitudes innortheast Asia.Nature,4(31):559~562.
迟振卿,刘兴起,胡欣,王永,闵隆瑞,刘竹杰.2010.泥河湾盆地井儿洼剖面揭示的47~25ka B.P.期间的气候环境演化.地质学报,7(84):940~947.
刘秀铭,许同春,刘东生.1989.中国黄土磁化率各向异性与成因及其对第四纪研究的意义.中国科学(B辑),4:441~447.
闵隆瑞,张宗祜,王喜生,郑绍华,朱关祥.2006.河北阳原台儿沟剖面泥河湾组底界的确定.地层学杂志,30(2):104~109.
汤英俊,李毅,陈万勇.1995.河北阳原小长梁遗址哺乳类化石及其时代.古脊椎动物学报,33(1):74~83.
王红强.2007.泥河湾盆地东谷坨剖面磁性特征及环境意义.第四纪研究,27(6):1081~1091.
王永,迟振卿,李德贵,闵隆瑞,诸惠燕.2004.泥河湾盆地0.8Ma以来的地磁场相对强度记录.科学通报,49(9):879~882.
卫奇.1994.泥河湾盆地半山早更新世旧石器遗址初探.人类学学报,13(3):223~238.
吴汉宁,岳乐平.1997.风成沉积物磁组构与中国黄土区第四纪风向变化.地球物理学报,40(4):487—494.
夏正楷,刘锡清.1984.泥河湾层古地理环境的初步认识.海洋地质与第四纪地质,4(3):101~110.
谢飞,李琚,刘连强.2006.泥河湾旧石器文化.石家庄:花山文艺出版社,1~278.
杨晓强,李华梅.1999.泥河湾盆地典型剖面沉积物磁化率特征及其意义.海洋地质与第四纪地质,19(1):75~83.
杨晓强,李华梅.2000.陆相断陷湖盆沉积物磁组构特征及环境意义—以泥河湾盆地为例.海洋地质与第四纪地质,20(3):43~52.
张玉芬,李长安,阎桂林.2004.长江中游堤防溃口沉积物的磁组构特征.地质学报,78(3):428~432.
张宗祜,闵隆瑞,朱关祥.2003.河北省阳原台儿沟剖面泥河湾河湖相层岩石地层的划分.地质通报,22(6):379~383.
周庭儒,李华章,刘清泗,李荣全,孙秀平.1991.阳原盆地新生代古地理.科学出版社.北京,1~162.
Ao Hong,Deng Chenglong,Dekkers M J,Liu Qingsong.2010.Magnetic mineral dissolution in Pleistocene fluvio-lacustrinesediments,Nihewan Basin(North China).Earth Planet.Sci.Lett.,292:191~200.
Barbour G B.1924.Preliminary observation in Kalgan area.Bulletin ofthe Geological Society of China,3(2):167~168.
Deng Chenglong,Wei Qi,Zhu Rixiang,Wang Hongqiang,Zhang Rui,Ao Hong,Chang Liao,Pan Yongxin.2006.Magnetostratigraphicage of the Xiantai Paleolithic site in the Nihewan Basin and implications for early human colonization of Northeast Asia.Earth andPlanetary Science Letters,244:336~348.
Deng Chenglong,Xie Fei,Liu Caicai,Ao Hong,Pan Yongxin,ZhuRixiang.2007.Magnetochronology of the Feiliang Paleolithic site inthe Nihewan Basin and implications for early human adaptability tohigh northern latitudes in East Asia.Geophys.Res.Lett.,34:L14301,doi:10.11029/2007GL030335.
Deng Chenglong,Zhu Rixiang,Zhang Rui,Ao Hong,Pan Yongxin.2008.Timing of the Nihewan formation and faunas.QuaternaryResearch,69:77~90.
Dong Jin,Gao Rui,Wang Yong,Zhang Shihong,Yao Peiyi,ChiZhenqing,Zhao Zhili.2013.Magnetic fabric study of late Holocenesediments in Huangqi lake,Inner Mongolia and its sedimentarysignificance,Acta Geologica Sinica(English Edition),87(1):186~196.
Ellwood B B,Ledbetter M T.1977.Antarctic bottom water fluctuationsin the Vema Channel:effects of velocity changes on particlealignment and size.Earth Planet.Sci.Lett.,35:189~198.
Ellwood B B.1975.Analysis of emplacement mode in basalt from deep-sea drilling project holes 319A and 321 using anisotropy ofmagnetic susceptibility.Journal of Geophysical Research,80:4805~4808.
Hamilton N,Rees A L.1970.The use of magnetic fabric in paleocurrentestimation.In:Runcorn S K.eds.Paleogeophysics.London:Academic Press,445~464.
Hrouda F.1982.Magnetic anisotropy of rocks and its application ingeology and geophysics.Surveys in Geophysics,5:37~82.
Jelinek V.1981.Characterization of the magnetic fabric of rocks.Tectonophysics,79:63~67.
Ledbetter M T,Ellwood B B.1980.Spatial and temporal changes inbottom water velocity and direction from analysis of particle size dataand alignment in deep-sea sediment.Marine Geology,38:245-261.
Li Huamei,Yang Xiaoqiang,Heller F,Li Haitao.2008.High resolutionmagnetostratigraphy and deposition cycles in the Nihewan Basin(North China)and their significance for stone artifact dating.Quat.Res.,69:250~262.
Park C K,Doh S J,Suk D W,Kim K H.2000.Sedimetnary fabric ondeep-sea sediments from KODOS area in the eastern Pacific.Marine Gelogy,171:115-126.
Ree A L,Woodall W A.1975.The magnetic fabric of some laboratorydeposited sediments.Earth and Planetary Science Letters,25:121-130.
Schneider J L,Pollet N,Chapron E,Wessels M,Wassmer P.2004.Signature of Rhine Valley sturzstrom dam failures in Holocenesediments of Lake Constance,Germany.Sedimentary Geology,169:75-91.
Tarling D H,Hrouda F.1993.The magnetic anisotropy of rocks.London:Chapman&Hall,1~218.
Wang Hongqiang,Deng Chenglong,Zhu Rixiang,Wei Qi,Hou Yamei,Boeda E.2005.Magnetostratigraphic dating of the Donggutuo andMaliang Paleolithic sites in the Nihewan Basin,North China.Quat.Res.,64:1~11.
Wang Xisheng,Lvlie R,Su Pu,Fan Xingzhao.2008.Magneticsignature of environmental change reflected by Pleistocene lacustrinesediments from the Nihewan Basin,North China.Palaeogeogr.,Palaeoclimatol.,Palaeoecol.,260:452~462.
Wassmer P,Schneider J L,Fonfrege A V,Lavigne F,Paris R,Gomez.2010.Use of anisotropy of magnetic susceptibility(AMS)in thestudy of tsunami deposits:Application to the 2004 deposits on theeastern coast of Banda Aceh,North Sumatra,Indonesia.Marinegeology,275:255-272.
Zhu R X,Hoffman K A,Potts R,Deng C L,Pan Y X,Guo B,Shi CD,Guo Z T,Yuan B Y,Hou Y M,Huang W W.2001.Earliestpresence of humans in northeast Asia.Nature,413:413-417.
Zhu Rixiang,Liu Qingsong,Jackson M J.2004a.Paleoenvironmentalsignificance of the magnetic fabrics in Chinese loess-paleosols sincethe last interglacial(<130 Ka).Earth and Planetary ScienceLetters,221:55~59.
Zhu R X,Potts R,Xie F,Hoffman K A,Deng C L,Shi C D,Pan Y X,Wang H Q,Shi R P,Wang Y C,Shi G H,Wu N Q.2004b.Newevidence on the earliest human presence at high northern latitudes innortheast Asia.Nature,4(31):559~562.