Journal of University of Chinese Academy of Sciences >
Preliminary SEM Study of Quartz Surface Features from Lingtai Section and its Palaeoclimatic Significance
Received date: 2001-09-24
Revised date: 2001-10-10
Online published: 2002-01-10
We studied the surface features of the quartz grains of the red clay loess deposits from Lingtai,Chinese Loess Plateau,and found that there are no significant differences between the quartz grains from the red clay and from the loess palaeosol layers.All of the samples displayed a similar assemblage of both the freshly crushed features and pits obtained from the collisions of grains during the wind transportation.We think that the red clay formation has a similar origin with the loess palaeosol deposits:the denudation of the plateau (maybe with the process of frost weathering) provides a large amount of silt material,then the northwestern winds blow them to the loess plateau hundreds kilometers away.The combination of the surface features shows that four transitions occurred during the last～7.0 Ma,～4.2～5.0 MaB.P.,～3.6 MaB.P.,～2.6MaB.P.and ～0.9 MaB.P.respectively.This may be related to the phasic uplift of the Tibetan Plateau.
Key words： quartz; loess; red clay; Lingtai; surface features
HOU ShengShan . Preliminary SEM Study of Quartz Surface Features from Lingtai Section and its Palaeoclimatic Significance[J]. Journal of University of Chinese Academy of Sciences, 2002 , 19(1) : 59 -68 . DOI: 10.7523/j.issn.2095-6134.2002.1.008
[1] Krinsley D H, Doornkamp J C.Atlas of Quartz Surface Textures.New York:C ambridge University Press, 1973.91.
[2] 谢又予.中国石英砂表面结构特征图谱.北京:海洋出版社, 1984.148.
[3] 张汝藩, 杨主恩等.扫描电镜与微观地质研究.北京:学苑出版社, 1999.104.
[4] 方小敏, 史正涛, 沈明智.试从兰洲地区石英砂表面特征探讨黄土物质来源、成因及环境变迁.见:中国西部第纪冰川与环境.北京:科学出版社, 1991.138～147.
[5] Pye K.Aeolian Dust and Dust Deposit,S an Diego,Academi c Press.1987.334
[6] Rea D K,S noeckx H, Joseph L H.Lat e Cenozoic Eolian Deposit ion in the North Pacif ic:Asian Drying, Tibetan Uplif t, and Cooling of the Northern Hemisphere.Paleoceanography, 1998, 13(3):215～224
[7] Ding Z L, Sun J M, Yang S L, Liu T S.Preliminary Magnet ost rat igraphy of a Thick Eolian Red Clay-loess Sequence at Lingt ai, the C hinese Loess Platiau.Geophysicsal Research Let ters, 1998, 25:1225～1228
[8] Ding Z L, S F Xiong, J M Sun, S L Yang, Z Y Gu, T S Liu.Pedost rat igraphy and Paleomagnet ism of a～7.0 Ma Eolian Loess-red Clay S equence at Lingt ai, Loess Plateau, North-central C hina and the Implicat ions for Paleomonsoon Evolut ion.Palaeogeography, Palaeoclimatology , Palaeoecology, 1999, 152:49～66.
[9] S un D.H, Shaw J, An Z S,C heng M Y, Yue L P.M agnet ost raphy and Paleoclimat ic Int erpret ation of a Con tinuous 7.2Ma Lat e Cenozoi c Eolian Eediment s f rom the Chinese Loess Plateau.Geophysical Research Let ters, 1998, 25:85～88
[10] 卢演俦, 文启忠, 黄伯钧, 闵育顺, 邓华兴.中国黄土物质来源的初步探讨———石英粉砂颗粒表面结构的电子显微镜研究.地球化学, 1976(1):47～53
[11] Friedman G M, Johnson D G.李文厚等编译.沉积岩实习.西安:西北大学出版社, 1990.116
[12] 刘东生等.黄土与环境.北京:科学出版社, 1985
[13] Guo Z T, Biscaye P, Wei L Y, Chen X H, Peng S Z, Liu T S.Summer Monsoon Variat ions Over the Last 1.2 Ma from the Weathering of Loess-soil S equences in China.Geophysical Research Let ters, 2000, 27:1751～1754
[14] 杨石岭, 丁仲礼.7.0 Ma 以来中国风尘沉积的游离铁/全铁值变化及其古季风指示意义.科学通报, 2000, 45(22):2453～2456
[15] Rea D K.The Paleoclimati c Record Provided by Eolian Deposition in the Deep Sea:T he Geologi cal History of Wind.Review s of Geophysics, 1994, 32(2):159～195
[16] Mazzullo J, A Alexander, T Tieh, Ding Menglin.The Ef fects of Wind Transport on the Shapes of Quart z Silt Grains.Journal of Sediment ary Pet rology, 1992, 62(6):961～971
[17] Mazzullo J, D S ims, D Cunningham.The Eff ect s of Eolian Sorting and Abrasion Upon the Shapes of Fine Quart z Sand Grains.Journal of Sedimentary Pet rology, 1985, 56(1):45～56
[18] S hackleton N J, M A Hall, D Pate.Pliocene St able Isotope S t ratigraphy of Site 846.In:N G Pi sias, et al.Procedings of Ocean Drilling Program Scient ific Results.1995.138:337～355
[19] J M Sun, T S Liu.St ratigraphic Evidence f or the Uplif t of the Tibet an Plateau Betw een～1.1 and～0.9my r Ago.Quat ernary Research, 2000, 54:309～320
/
| 〈 |
|
〉 |