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| Geochemical Compositions of Surface Sediment from Gobi Desert in Northern China and Its Sedimentary Significance |
| Luo Wanyin1, Dong Zhibao1, Qian Guangqiang1, Feng Yiming2, Lu Junfeng1, Wang Meng1, Ren Xiaobin1, Li Jiyan1 |
1. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
2. Institute of Desertification Studies, Chinese Academy of Forestry, Beijing 100091, China |
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Abstract Gobi (desert pavement) occupies a large area of the China's mainland as one of the important desert landscapes in arid and semi-arid regions. Its unique composition and sedimentary characteristics have important significance to explain its provenances and generate process. But, there still exist some lack of systematic investigation of the geochemical features of different types of gobi sediments in China. In this paper, we analyzed the geochemical element compositions of different particle size sediments through sieving treatment. The results show that the characteristics of major element composition of surface sediment are similar from different gobi surfaces, but it shows slightly different between different grain size sediments. Compared with the average chemical composition of UCC, major elements except Si is consistent with the UCC in surface sediments from gobi, the rest of the main elements are in varying degrees showed enrichment and leaching characteristics. Trace elements variation between different grain sizes in two mainly kinds of gobi shows basically the same trends with the main elements. Surface sediment from gobi lack of effectively chemical weathering processes in the extreme arid climate conditions, basically at no or weak initial, intermediate stages of the continental chemical weathering process. Each grain size sediment have better inheritance relationship after erosion and weathering processes shows that gobi gravels underlying fine-grained sedimentary layers are not exogenous handling precipitation, but formed through in situ weathering and pedogenesis of local rock fragments.
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Received: 07 July 2014
Published: 20 November 2014
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| [1] 刘英俊,王鹤年,曹励明,等.元素地球化学[M].北京:科学出版社,1984.[2] 任明达,王乃梁.现代沉积环境概论[M].北京:科学出版社,1981:115-126.[3] 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.[4] 刘东生.黄土与环境[M].北京:科学出版社,1985:481.[5] 刘宝珺.沉积岩石学[M].北京:地质出版社,1980.[6] 刘东生.黄土与干旱环境[M].合肥:安徽科学技术出版社2009:307-332.[7] Liu C Q,Masuda A,Okada A,et al.A geochemical study of loess and desert sand in northern China:implications for continental crust weathering and composition[J].Chemical Geology,1993,106:359-374.[8] 钱亦兵,吴兆宁,金井丰,等.塔克拉玛干沙漠沙物质成分研究[J].干旱区研究,1994,11(4):46-52.[9] 谢静,丁仲礼.中国东北部沙地重矿物组成及沙源分析[J].中国科学(D辑),2007,37(8):1065-1072.[10] 钱亦兵,吴兆宁,石井武政,等.塔克拉玛干沙漠沙物质成分特征及其来源[J].中国沙漠,1993,13(4):32-38.[11] 尚媛,鲁瑞洁,贾飞飞,等.青海湖湖东风成剖面化学元素特征及其环境指示意义[J].中国沙漠,2013,33(2):463-469.[12] Weltje G J,von Eynatten H.Quantitative provenance analysis of sediments:review and outlook[J].Sedimentary Geology,2004,171(1/4):1-11.[13] Garzanti E,Vezzoli G,Andò S et al.Quantifying sand provenance and erosion(Marsyandi River,Nepal Himalaya)[J].Earth and Planetary Science Letters,2007,258(3/4):500-515.[14] Yang X P,Zhang F,Fu X D,et al.Oxygen isotopic compositions of quartz in the sand seas and sandy lands of northern China and their implications for understanding the provenances of aeolian sands[J].Geomorphology,2008,102:278-285.[15] Nesbitt H,Young G.1996.Petrogenesis of sediments in the absence of chemical weathering:effects of abrasion and sorting on bulk composition and mineralogy[J].Sedimentology,43(2):341-358.[16] 谢远云,孟杰,郭令芬,等.松嫩平原杜蒙沙地地表物质的地化组成及风化特征[J].中国沙漠,2013,33(4):1009-1018.[17] 孙业乐,庄国顺,袁蕙,等.2002年北京特大沙尘暴的理化特性及其组分来源分析[J].科学通报,2004,49(4):340-346.[18] 张小曳,张光宇,朱光华,等.中国源区粉尘的元素示踪[J].中国科学(D辑),1996,26(5):423-430.[19] 谢远云,何葵,周嘉,等.哈尔滨沙尘暴的化学特征及其物质源探讨[J].地理研究,2006,25(2):255-261.[20] 孙继敏.中国黄土的物质来源及其粉尘的产生机制与搬运过程[J].第四纪研究,2004,24(2):175-183.[21] 陈骏,季峻峰,仇纲,等.陕西洛川黄土化学风化程度的地球化学研究[J].中国科学(D辑),1997,27(6):531-536.[22] 陈骏,安芷生,刘连文,等.最近2.5 Ma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[J].中国科学(D辑),2001,31(2):136-144.[23] Ding Z L,Sun J M,Yang S L et al.Geochemistry of the Pliocenered clay formation in the Chinese Loess Plateau and implications for its origin,source provenance and paleoclimate change[J].Geochimica et Cosmochimica Acta,2001,65(6):901-913.[24] Chen J,An Z S,Liu L W et al.Variations in chemical compositions of the eoliandust in Chinese Loess Plateau over the past 2.5 Ma and chemical weathering in the Asian inland[J].Science in China:Series D,2001,31(2):136-145.[25] Újvári G,Varga A,Balogh-Brunstad Z.Origin,weathering,and geochemical composition of loess in southwestern Hungary[J].Quaternary Research,2008,69(3):421-437.[26] 赵松乔.中国干旱区自然地理[M].北京:科学出版社,1985.[27] Cook R,Warren A,Goudie A.Desert Geomorphology[M].London,UK:UCL Press,1993.[28] Springer M E.Desert pavement and vesicular layer of stone soils of the desert of the Lahontan Basin,Nevada[J].Soil Science Society of America Proceedings,1958,22:63-66.[29] McFadden L,Wells S G,Michael J J.Influences of eolian and pedogenic processes on the origin and evolution of desert pavements[J].Geology,1987,15:504-508.[30] Haff P K.Biolevitation of pebbles on desert surfaces[J].Granular Matter,2014,16:275-278.[31] 钱广强,董治宝,罗万银,等.基于数字图像的中国西北地区戈壁表面砾石形貌特征研究[J].中国沙漠,2014,34(3):625-633.[32] 冯益明,吴波,周娜,等.基于遥感影像识别的戈壁分类体系研究[J].中国沙漠,2013,33(3):635-641.[33] Taylor S R,McLennan S M.The Continenal Crust:its composition and evolution[M].Boston,USA:Blackwell Scientific,1985.[34] Nesbitt H W,Young G M.Prediction of some weathering trends of plutonic and volcanic rocks based on thermodynamic and kinetic considerations[J].Geochimica et Cosmochimica Acta,1984,48:1523-1534.[35] Honda M,Shimizu H.Geochemical mineralogical and sedimentological studies on the Taklimakan desert sands[J].Sedimentology,1998,45:1125-1143.[36] Yong G M,Nesbitt H W.Paleoclimatology and provenance of the glaciogenic Gowganda Formation (Paleoproterozoic),Ontario,Canada:A chemostratigraphic approach[J].GSA Bulletin,1999,111:264-274.[37] 冯连君,储雪蕾,张启锐等.化学蚀变指数(CIA)及其在新元古代碎屑岩中的应用[J].地学前缘,2003,10(4):539-544.[38] 王自强,尹崇玉,高林志等.黔南—桂北地区南华系化学地层特征[J].地球学报,2009,30(4):465-474[39] Nesbitt,H W,Young,G M.Formation and diagenesis of weathering profiles[J].Journal of Geology,1989,97:129-147[40] McLennan S M,Hemming S,McDaniel D K,et al.Geochemical approaches to sedimentation,provenance and tectonics[M]//Johnsson M,Basu A. Processes Controlling the Composition of Clastic Sediment:Geological Society of America Special Paper.1993:21-40[41] 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,1995,23:921 924.[42] Nesbitt H W,Markovics G,Price R C.Chemical processes affecting alkalis and alkaline earths during continental weathering[J].Geochimica et Cosmochimica Acta,1980,44:1659-1666. |
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2014, Vol. 34 
