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白水黄土-红粘土化学风化强度的剖面特征与粒度效应

, PP. 812-821

Keywords: 黄土-红粘土,化学风化,CIA,粒度效应

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Abstract:

白水剖面黄土-红粘土全样化学分析表明,以CIA指数为代表的化学风化强度从剖面下部往上逐步变弱,波动增大,总体趋势与深海氧同位素代表的全球冰量变化可以很好对比。分粒级组分化学分析则显示,黄土-红粘土主要元素迁移及化学风化强度与粒度强烈相关,CIA指数表征的化学风化强度变化在相当程度上受到粒度变化的控制。总体上,黄土-红粘土各粒级颗粒的风化程度都不高,而且沉积之后的成土风化作用对其主要元素含量的影响有限,黄土-红粘土化学成分的长期变化趋势主要受到物源的新加入和混合过程的影响。从剖面变化看,粗粒级部分(5~20μm和20~63μm)的风化指数的变化特征与细粒级部分(<5μm)不完全相同,表明不同粒级组分接受化学风化以及在物源区停留的历史不尽相同。1Ma以来,各粒级CIA指数都整体降低,显示物源区新鲜、弱风化碎屑影响到各粒级颗粒的混合过程。进一步对细粒级部分(<5μm)化学成分演化进行的分析显示,其元素含量呈现不同组分递次变化的"序列模式",从红粘土下部(约4.5Ma)到黄土上部(约0.6Ma),K2O/Al2O3,Na2O/Al2O3,CaO/Al2O3和MgO/Al2O3比率的变化依次出现转折,这很可能与晚新生代黄土-红粘土物源区构造抬升、冰川剥蚀能力不断加大,使得新鲜基岩不断被剥蚀、去顶,由此造成主要造岩矿物顺序剥蚀、接受风化,成为粉尘新物源有关。

References

[1]  Liu C Q,Ma Suda A,Okada A et al.A geochemical study of loess and desert sand in Northern China:Implications for continental crust weathering and composition.Chemical Geology,1996,106:359~374
[2]  Gallet S,Jahn B M,Torii M.Geochemical characterization of the Luochuan loess-paleosol sequence,China,and paleoclimatic implications.Chemical Geology,1996,133(1):67~88
[3]  Chen Jun,An Zhisheng,Head J.Variation of Rb/Sr ratios in the loess-paleosol sequences of Central China during the last 130,000 years and their implications for monsoon paleoclimatology.Quaternary Research,1999,51(3):215~219
[4]  Taylor S R,McLennan S M,McCulloch M T.Geochemistry of loess,continental crustal composition and crustal model ages.Geochimica et Cosmochimica Acta,1983,47(11):1897~1905
[5]  Sun J M.Provenance of loess material and formation of loess deposits on the Chinese Loess Plateau.Earth and Planetary Science Letters,2002,203(3~4):845~859
[6]  Chen J,Li G,Yang J.Nd and Sr isotopic characteristics of Chinese deserts:Implications for the provenances of Asian dust.Geochimica et Cosmochimica Acta,2007,71(15):3904~3914
[7]  Xie Jing,Ding Zhongli.Compositions of heavy minerals in the northeastern China sandlands and analysis of provenance.Science in China (Series D),2007,50(11):1715~1721
[8]  Guo Zhengtang,Biscaye P,Wei Lanying et al.Summer monsoon variations over the last 1.2Ma from the weathering of loess-soil sequences in China.Geophysical Research Letters,2000,27(12):1751~1754
[9]  Ding Z L,Yang S L,Sun J M et al.Iron geochemistry of loess and red clay deposits in the Chinese Loess Plateau and implications for long-term Asian monsoon evolution in the last 7.0Ma.Earth and Planetary Science Letters,2001,185(1~2):99~109
[10]  Yang Shiling,Ding Feng,Ding Zhongli.Pleistocene chemical weathering history of Asian arid and semi-arid regions recorded in loess deposits of China and Tajikistan.Geochimica et Cosmochimica Acta,2006,70(7):1695~1709
[11]  Xiong S F,Ding Z L,Jiang W Y et al.Initial intensification of East Asian winter monsoon at about 2.75Ma as seen in the Chinese eolian loess-red clay deposit.Geophysical Research Letters,2003,30(10):1524,doi:10.1029/2003GL017059
[12]  Taylor S,McLennan S.The Continental Crust:Its Composition and Evolution:An Examination of the Geochemical Record Preserved in Sedimentary Rocks(GT).Oxford:Blackwell Publishing,1985.1~328
[13]  Rudnick R L,Gao S.Composition of the continental crust.In:Rudnik R L ed.The Crust(Vol.3,Treatise on Geochemistry,Holland H D,Turekian K K eds).Oxyford:Elsevier-Pergamon,2004.1~64
[14]  Nesbitt H W,Young G M.Early Proterozoic climates and plate motions inferred from major element chemistry of lutites.Nature,1982,299:715~717
[15]  Harnois L.The CIW index:A new chemical index of weathering.Sedimentary Geology,1988,55:319~322
[16]  Parker A.An index of weathering for silicate rocks.Geological Magazine,1970,107(6):501~504
[17]  Ding Z L,Xiong S F,Sun J M et al.Pedostratigraphy and paleomagnetism of a~7.0Ma eolian loess-red clay sequence at Lingtai,Loess Plateau,North-central China and the implications for paleomonsoon evolution.Palaeogeography,Plaeoclimatology,Plaeoecology,1999,152(1~2):49~66
[18]  Mix A C,Pisias N G,Rugh W et al.Benthic foraminifer stable isotope record from Site 849(0~5Ma):Local and global climate changes.In:Pisias N G,Mayer L A,Janecek T R et al.eds.Proceedings of the Ocean Drilling Program,Scientific Results,138.College Station,TX:Ocean Drilling Program,1995.371~412
[19]  Shackleton N J,Hall M A,Pate D.Pliocene stable isotope stratigraphy of Site 846.In:Pisias N G,Mayer L A,Janecek T R et al.eds.Proceedings of the Ocean Drilling Program,Scientific Results,138.College Station,TX:Ocean Drilling Program,1995.337~355
[20]  熊毅,李庆逵主编.中国土壤.北京:科学出版社,1987.1~746 Xiong Yi,Li Qingkui eds.Soils of China.Beijing:Science Press,1987.1~746
[21]  陈隆亨,李福兴,邸醒民等.中国风沙土.北京:科学出版社,1998.1~188 Chen Longheng,Li Fuxing,Di Xingmin et al.Aeolian Sandy Soils in China.Beijing:Science Press,1998.1~188
[22]  熊尚发,丁仲礼,刘东生.南方红土元素迁移特征及其古环境意义.土壤学报,2001,38(1):25~31 Xiong Shangfa,Ding Zhongli,Liu Tungsheng.Mass balance geochemistry of the red earth in Southern China and its environmental implications.Acta Pedologica Sinica,2001,38(1):25~31
[23]  Gylesj(o) S,Arnold E.Clay mineralogy of a red clay-loess sequence from Lingtai,the Chinese Loess Plateau.Global and Planetary Change,2006,51(3~4):181~194
[24]  Dixon J B,Weed S B eds.Minerals in Soil Environment,2nd Edition Soil Science Society of America Book.Madison:Soil Science Society of America,1989.1~1244
[25]  中国地质科学院地质研究所,武汉地质学院编制.中国古地理图集.北京:地图出版社,1985.1~143 Institute of Geolgy,Chinese Academy of Geological Sciences,Wuhan College of Geology eds.Atlas of the Palaeogeography of China.Beijing:Sinomaps Press,1985.1~143
[26]  《中国地质图集》编委会编(马丽芳主编).中国地质图集.北京:地质出版社,2002.1~348 Editing Committee of"Geological Atlas of China"ed(Ma Lifang ed).Geological Atlas of China.Beijing:Geological Publishing House,2002.1~348
[27]  刘东生等.黄土的物质成分和结构.北京:科学出版社,1966.1~132 Liu Tungsheng et al.Composition and Structure of the Loess.Beijing:Science Press,1966.1~132
[28]  Bowen N L.The Evolution of the Igneous Rocks.New York:Dover,1928.1~332
[29]  Tapponnier P,Xu Zhiqin,Roger F et al.Oblique stepwise rise and growth of the Tibet Plateau.Science,2001,294:1671~1677
[30]  张培震,郑德文,尹功明等.有关青藏高原东北缘晚新生代扩展与隆升的讨论.第四纪研究,2006,26(1):5~13 Zhang Peizhen,Zheng Dewen,Yin Gongming et al.Discussion on Late Cenozoic growth and rise of northeastern margin of the Tibetan Plateau.Quaternary Sciences,2006,26(1):5~13
[31]  Zhang Peizhen,Molnar P,Downs W R.Increased sedimentation rates and grain sizes 2~4 Myr ago due to the influence of climate change on erosion rates.Nature,2001,410:891~897
[32]  Lyell C.Observations on the loamy deposit called "Loess" of the basin of the Rhine.Edinburgh New Philosophical Journal,1834,17:110~113
[33]  刘东生,张宗祜.中国的黄土.地质学报,1962,42(1):1~14 Liu Tungsheng,Chang Tunghu.The loess in China.Acta Geologica Sinica,1962,42(1):1~14
[34]  刘东生等著.黄土与环境.北京:科学出版社,1985.1~481 Liu Tungsheng et al.Loess and the Environment.Beijing:Science Press,1985.1~481
[35]  An Z S,Kutzbach J E,Prell W L et al.Evolution of Asian monsoons and phased uplift of the Himalaya-Tibetan Plateau since Late Miocene times.Nature,2001,411:62~66
[36]  Ding Z L,Yu Z W,Rutter N W et al.Towards an orbital time scale for Chinese loess deposits.Quaternary of Science Reviews,1994,13:39~70
[37]  Ding Z L,Derbyshire E,Yang S L et al.Stacked 2.6-Ma grain size record from the Chinese loess based on five sections and correlation with the deep-sea δ18 O record.Paleoceanography,2002,17(3):1033,doi:10.1029/2001PA000725
[38]  熊尚发.黄土-红粘土记录的构造尺度气候变化.第四纪研究,2007,27(2):242~250 Xiong Shangfa.Chinese loess-red clay bearing climate changes on tectonic time scales.Quaternary Sciences,2007,27(2):242~250
[39]  文启忠等著.中国黄土地球化学.北京:科学出版社,1989.1~285 Wen Qizhong et al.Loess Geochemistry in China.Beijing:Science Press,1989.1~285
[40]  顾兆炎,丁仲礼,熊尚发等.灵台红粘土和黄土-古土壤序列的地球化学演化.第四纪研究,1999,(4):357~365 Gu Zhaoyan,Ding Zhongli,Xiong Shangfa et al.A seven million geochemical record from Chinese red-clay and loess-paleosol sequence:Weathering and erosion in Northwestern China.Quaternary Sciences,1999,(4):357~365
[41]  陈骏,安芷生,刘连文等.最近2.5Ma以来黄土高原风尘化学组成的变化与亚洲内陆的化学风化.中国科学(D辑),2001,31(2):136~145 Chen Jun,An Zhisheng,Liu Lianwen et al.Variations in chemical compositions of the eolian dust in Chinese Loess Plateau over the past 2.5Ma and chemical weathering in the Asian inland.Science in China (Series D),2001,44(5):403~413
[42]  Sun Jimin.Nd and Sr isotopic variations in Chinese eolian deposits during the past 8Ma:Implications for provenance change.Earth and Planetary Science Letters,2005,240(2):454~466
[43]  Vogt T.Sulitjelmafeltets geologi og petrografi.Norges Geologiske Unders?ikelse,1927,121:1~560
[44]  Chittleborough D J.Indices of weathering for soil and paleosols formed on silicate rocks.Australian Journal of Earth Sciences,1991,38:115~120
[45]  Vogel D E.Precambrian weathering in acid metavolcanic rocks from the Superior Province,Villebon Township,South-Central Quebéc.Canadian Journal of Earth Sciences,1975,12:2080~2085
[46]  Ruxton B P.Measures of the degree of chemical weathering of rocks.Journal of Geology,1968,76:518~527

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