EOLIAN ORIGIN OF THE RED CLAY DEPOSITS IN THE LOESS PLATEAU AND IMPLICATIONS FOR PLIOCENE CLIMATIC CHANGES
-
摘要: 本文通过对黄土高原第三纪红粘土的野外观察，以及沉积学和地球化学分析，得到能证明红粘土为风成沉积的新证据。另外，佳县红粘土沉积的土壤学特征表明，上新世时期的东亚夏季风强度总体强于第四纪。Abstract: In the Loess Plateau,most of the complete loess soil sequences are directly underlain by a set of reddish clay silt deposits named informally as the Red Clay formation.The contact between loess and the Red Clay has been paleomagnetically dated in several sections to be about 2 6 Ma B.P.(around the Matsuyama/Gauss reversal). Recently we have made careful field observations on several Red Clay sections in different parts of the Loess Platear,and analyzed 1 800 particle size and 30 geochemical samples taken from the Jiaxian section situated in the northern part of the Plateeau.Field and laboratory studies show the following interesting features
-
Key words:
- Red Clay /
- East Asia summer monsoon /
- aridification
-
-
[1] Shack leton N J,Berger A,Peltier W R.A n alternative astronom ical calib ration of the Lower Pleistocenetim escale based on ODP site 677.Royal Society of Edinburgh Transactions:Earth Sciences,1990,81:251～261
[2] Ruddiman W F,Raymo M E,Martinson D G et al.P leistocene evolution:Northern Hemisphereice sheets andNorth Atlantic Ocean.Paleoceanography,1989,4:353～412
[3] Raymo M E,Ruddiman W F,Shackleton N J et al.Evolution of A tlantic-Pacific δ13C gradients over the last215m.y.Earth and Planetary Scince Letters,1990,97(3～4):353～368
[4] Berggren W A,Hilgen F J,Langereis G G et al.Later Neogene chronology:New perspectives in high-resolutionstratig raphy.Geological Society of American Bulletin,1995,107:
[[5] 刘东生等.黄土与环境.北京:科学出版社,1985.62～81
[5] Ding Zhong li,RutterN W,Han Jing tai et al.A cou led environmental system for ed at about 2.5Ma in East Asia. Palaeogeography,Palaeoclimatology, Pslseoecology, 1992, 94: 223～242
[6] Teilhard de Chardin P,Young C C.Preliminary observation on the pre2loessic and post-Ponian Formation in western Shanxi and northern Shenxi.Memoir Geological Survey China,Ser.A,1930,8:1～54
[7] Teilhard de Chardin P,Young C C.Fossil mammals from the Late Cenozoic of the northern China.Paleontologia Sinica,Ser.C,1931,9(1):1～66
[8] 杨钟健.三门系之历史的检讨.地质论评,1934,1(3):323～330
[9] 刘东生,李传夔,翟人杰.陕西蓝田上新世脊椎动物化石.见:中国地质科学院地层古生物论文集编委会编.地层古生物论文集(第七辑).北京:地质出版社,1978.149～199
[10] 邱占祥,黄为龙,郭志慧.中国的三趾马化石.中国古生物志,新丙种第25号.北京:科学出版社,1987.
[11] 陈晓峰.山西静乐县“静乐期”地层及大哺乳动物化石.第四纪研究,1994,(4):339～353
[12] 张云翔,薛祥熙,岳乐平.陕西府谷老高川新第三纪“红层”的划分与时代.地层学杂志,1995,19(3):214～219
[13] 赵景波.西安、山西保德第三纪晚期红土的研究.沉积学报,1989,7(3):113～120
[14] Liu X M,Xu T C,Liu T S.A sudy of anisotropy of magnetic susceptibility of loess from Xifeng.Geophysical Journal,1988,92(2):349～353
[15] 张云翔,薛祥熙.甘肃武都龙家沟三趾马动物群化石的埋藏特点及该地“三趾马红层”的成因.科学通报,1995,40(19):1782～1784
[16] Ding Zhong li,Yu Zhiwei,Rutter N W.Toward san orbital time scale fo r Ch inese loess depo sits.Q ua terna ryS cience R ev iew s,1994,13(1):39～70
[17] Ku tzbach J E,Street-Perro tt F A.M ilankovitch fo rcing of fluctuation s in the level of trop ical lakes from 18to 0 kyrB.P.N a tu re,1985,317:130～134
[18] L iu T ung sheng,D ing Zhong l.iStepw ise coup ling of m on soon circu lation s to g lobal ice vo lum e variation s du ringthe L ate Cenozo ic.G loba l and P laneta ry Chang e,1993,7:119～130
[19] Hovan S A,R ea D K,P isias N G et a l.A d irect link betw een the Ch ina loess and m arine?18O reco rd s:A eo lianflux to the no rth Pacific.N a tu re,1989,340:296～298
[20] Zheng H B,A n Z S,Shaw J et a l.A detailed terrestrial geom agnetic reco rd fo r the in terval 0～5
[21] M a.In:L iu T S ed s.L oess,Environm en t and Global Change.Beijing:Science P ress,1991,147～156
[22] 吴明清,文启忠,潘景瑜等.黄河中游地区马兰黄土的稀土元素.科学通报,1991,36(5):366～369
[23] Dow sett H,T hom p son R,Barron J et a l.Jo in t investigation of theM idd le P liocene clim ate:PR ISM p aleoen2vironm en tal recon struction s.G loba l and P laneta ry Chang es,1994,9:169～195
[24] Sarn thein M,Fenner J.Globalw ind2induced change of deep-sea sed im en t budgets,new ocean p roduction andCO
[25] reservio rs ca.313～2135M aB.P.P h ilosop h ical T ransaction of R oy al S ociety of L ond on,1988,318:487～504
-
计量
- 文章访问数: 2420
- PDF下载数: 1921
- 施引文献: 0
下载: