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1、 14 1 2012 2 JOURN AL OF PALAEOGEOGRAPHY Vol . 14 No. 1 Fe b 2012 1671 1505 2012 01 0125 08 * 1 2 1 1 2 3 1 1 1 510275 2 510275 3 510275 1 。 3 PRD09、 PRD16 PRD17 。 。 PRD09 PRD17 PRD16 。 。 、 REE LREE / HREE、 La/Gd N La/Yb N 。 Ce、 Eu Ce、 Eu 。 1956 W r z bu r g 。 E- mail e e s l cl mail .s y s u .e du
2、.cn。 P534.63 A * 40872024 40534019 200908 2011 07 08 2011 10 25 RE E g e o c h e m ic a l c h a r a c t e r is t ic s o f m o t t le d c la y s o f t h e La t e Qu a t e r n a r y in t h e Pe a r l Riv e r De lt a Li u Chunli an 1 2 YangTi ngti ng 1 Wu Ji e 1 2 Xi aBi n 3 HuangYi 1 Z hangSuq i ng 1
3、1 D e p ar t me n t ofEar t h Scie n ce s Su nYat - Se nUn iv e r s it y Gu an gz hou 510275 Gu an gdon g 2 Gu an gdon g Pr ov in cialKe y Labor at or y ofM in e r alRe s ou r ce s Ge ol ogicalPr oce s s e s Gu an gz hou 510275 Gu an gdon g 3 Ke y Labor at or y ofOf f s hor eOilEx p l or at ionan d
4、D e v e l op me n t ofGu an gdon g Highe r Edu cat ionIn s t it u t e s Gu an gz hou 510275 Gu an gdon g Ab s t r a c t A layer ofm ottled clays sandwi ched between the Upper Plei stocene and the Holocene i s wi dely di str i buted i n the Pear lRi v er D eltaar ea Itwas the weather i ngpr oductofth
5、e Upper Plei stocene sedi m ents and m ai nly f or m ed dur i ng the last glaci al m axi m um Geochem i cal analysi s on thr ee cor es PRD 09 PRD 16 and PRD 17 suggests an appar entchange i n REE contentand f r acti onati on dur i ngthe 2012 2 weather i ng The totalREE concentr ati ons ofthe m ottle
6、d clays ar e lar gely lowerthan those ofunder lyi ng sedi m ents The pr oxi m ate under lyi ngsedi m ents show aclear enr i chm enti n REE par ti cular ly i n HREE PRD 09 and PRD 17 subj ected to a m or e i ntensi v e weather i ng exhi bi t m or e enr i chm ent i n REE than PRD 16 thatshows aless we
7、ather i ngi ntensi ty The aci di c condi ti on dev eloped i n the Pear l Ri v erD elta ar eadur i ngthe lastglaci al whi ch enhanced the m obi li ty ofthe REE elem ents Hi gherLREE /HREE La/Gd N and La/Yb N v alues i n m ottled clays than i n under lyi ng sedi m ents wer e r esulted f r om di f f er
8、 entm obi li ty and adsor pti on on clay m i ner als ofLREE and HREE dur i ngweather i ng Itseem s that the weather i nghad less i nf luence on anom alyofCe and Eu The m ottled clays show sli ghtlym or e negati v e Ce and Eu anom aly than under lyi ngsedi m ents Ke y w o r d s REE weather i nglayer
9、Late Quater nar y Pear lRi v er D elta Ab o u t t h e f ir s t a u t h o r Li u Chunli an bor n i n 1956 i s apr of essorofthe D epar tm entofEar th Sci ences ofSun Yat-Sen Uni v er si ty wi th a Ph.D .degr ee obtai ned f r om the Uni v er si ty W r zbur g Ger m any She i s cur r entlyengaged i n the Cenozoi cpalaeoenv i r onm ent E-m ai l eeslcl m ai 1 1 8 m 。 1991 1996 1997 2007 2007 2008 。 131 m 1990 。
