ADVAN CE IN EA R TH SC IEN CES

16 3 2001 6 ADVAN CE IN EA R TH SC IEN CES V o l. 16 N o. 3 Jun., 2001 : 100128166 (2001) 0320374208 3 α, ( 541004) :,,,,, U ;, - : ; ; ; ; : P642. 25; X14 : A 1,, T IM S2U ( 230 T h2 234 U ), D evil s Ho le 18 O [1 ], : Baker [2 ] ; [3 ],, ; L au ritzen [4 ] 18 O c, 18 O, ; [5 ] ( ), ( ),,, ;, ;,, ; U T IM S2U, 0. 3% 0. 6% ; [6 ],,, ( ), PEP,,, α : 2000210212; : 20002112201 3 : ( : 49632100) ; ( : 9501104) 1 : (19652),,,, 1E-ma il: kdl@m ailbox. gxnu. edu. cn

3 : 375, T IM S, U 2T h 75 [7 ], 2 18 O 13 C,,,, H endy [8 ],,, ; ( ), [9 ] L au ritzen [7 ] (SD F),,, SD F SD F Gascoyne [10 ] ( 18 O c) 2 : ( 18 Op ) ;,, 18 Op, 18 Op ( ), 18 O c O N eil [11 ],, 10, 1, 18 O - - 0. 22-0. 23 0. 24 ; 20 18 Op [12 ], 1, 18 Op + 0. 28, 0. 28-0. 23% = 0. 05,, 18 O c (> 1) [13 ] (V ancouver) (T asm an ia),, 18 O c, 18 O c [9 ] (W aitomo) 3 18 O c 0. 2 PDB g100 m, 0. 7 g100 m 18 O c 0. 29 g, 0. 23, (10 7. 5 ka BP) 2 3, M cglone (1993) 10 8 ka BP 1 2 ; ( 3 2 ka BP) 1. 5, [14 16 ], L au ritzen [7 ] (SG93) T IM S2U 2T h 12, SG93 G ISP2, (SD F),,,, : 18 O c = e [ T 1 + 273. 15 b] [F (T 2, t, g ) + 10 3 ] - 10 3 + 1, 18 O c 18 O c D F T F a T 1, T 2,, T 1= T 2 t, g, a b : ( ) ( T F ), F (T, t, g ) ( D F), 18 Op = ct + d + SMOW (t), p, c d,, SMOW (t) 0 D F T F, T F, D F,,,

3 16 76 D F ( 18 Ow ) (w ),, c d,, 13 O c, CO 2 [17 ] CO 2, CO 2, 13 Cc CO 2 [18 ], C 4 CO 2 C 3 CO 2 13 C, C 3 ( ), C 4 ( ),, 13 C [17 ] C 3 C 4 CO 2 13 C 10, C 3-32 - 20, C 4-19 - 9 [19 ] T alm a [20 ] 13 Cc - 13 C 3, 13 Cc 1. 0 C 4 C 4,, 22 8 ( ), C 3 ;, ( ) C 3 [21, 22 ] D en2 n iston [18 ], 4 7, 4 13 Cc [17 ], 50 km 2 000 a: (Sp ring V alley) (M ystery) 2 000 a ( 8 ka BP),, 13 Cc C 3gC 4 [24 ] 13 C ( ) C 3gC 4 F rum k in [25 ] ( ), 13 Cc 13 Cc ( 13 C, 13 C C 3 ), 2 3, ( ), 13 Cc : 3 100 BC 1 200 BC, g,, 13 Cc 3,,, 1 mm, ;, ( ) (annual lam inae), [2, 3, 26 ] ( ), [2, 26 29 ] [30 ],,,,,, Shopov [31 ] 11 22 a, (10 2 10 4 a) [27, 32 ] [33 ], [34 ],,,,,,,,,,

3 : 377 Gen ty [35 ] Pere N oel,, Baker [36 ] (B risto l) L ow er, 11 3, ( ) Suanered (1998) (co ld air cave) (T 7) 15 (1981 1996) 0. 69 (99% ) ; 0. 78 (99% ),,, [37 ],,,, ( ) ( ) [3 ] 12 cm (T S9501), 1130, ( ) [30 ],,,, [38 ], Baker [39 ] (Poo l s) 2 (2. 5 5. 0 mm ga) 2 88%,,, 10 ( 12% ) ( 2 ), (> 60 mm gd) (> 250 mm g ),,, 1 a, B rook [40 ] EN SO ( ) EN SO,, A n joh ibe 2 EN SO 1951 1994 (SO I) (A ET ), : SO I A ET ; 1866 SO I, SO I E l N in ζ o ; 1550 (SS) ( E l N in ζ o ), EN SO, 4 ( ), Sr U, [41 ] M g Sr Ba U M g [42 ],, M g ( ), Sr, Gascoyne (1983) M ggsr Goede [43 ], M ggsr, M g Sr ( ), M ggsr Roberts [44 ] (S IM S),

3 16 78,, Roberts [45 ], GB 3, 3,, M ggsr,, ( ) ( ), M ggsr, Ba, M ggsr, Ba,, M ggsr 1999, A yalon [41 ] So req 16 4 Sr Ba U Sr U, 87 Srg 86 Sr 18 O, R = 0. 84, Sr Sr 18 O Goede [46 ] Sr, Sr ( 1gSr, m g g) 87 Srg 86 Sr, So req 0. 774 1gSr= 0 87 Srg 86 Sr= 0. 7087, (0. 7092), So req Sr, 87 Srg 86 Sr 0. 7082 0. 7085, (0. 7087), 69%,, Sr ; Sr, 0. 7079 0. 7082, (0. 7074), 54%, U 18 O, 234 U g 238 U 18 O (10 1. 05, 25 1. 06) U U U, U, U Baker (1993), U U, Sr U, [47 ] 5,,, [4, 10, 32 ] [43 ] Gonzalez [48 ],,,,,,, A yalon [41 ], So reg, (60 17 ka BP) (17 ka ) ( ), ( ) ( ), < 0. 1%, 18 O 18 O, ; 18 O ( 55 53 ka BP; 36 34 ka BP),, 17 ka BP, 18 O,,

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3 : 381 STUDY ON CONTINENTAL PAL EOENV IRONM ENTAL PROXY BASED ON SPEL EOTHEM S(D ROP STONES) ZHAN G Cheng, YU AN D ao2x ian (K a rst D y nam ics L abora tory, M in istry of L and R esou rces, Gu ilin 541004, Ch ina) Abstract: Compared w ith o ther natu ral m aterials, speleo them s have m any superio rities, such as w ide2 ranging distribu tion, long2tim e span, sen sitive to ou tside environm en t, fu ll2scale info rm ation, su itab le fo r U 2series dating, and p lay the sam e impo rtan t ro le as the sea depo sits, ice2co re, tree rings do. In particu2 lar, Cave drop stones2stalagm ites offered u s a k ind of distinctive data sou rce as con tinen tal paleoclim ate arch ives. In th is paper, the au tho rs review ed the advance in th is field in detail from the stab le iso tope, sta2 lagm ite m icrobanding, trace elem en ts geochem istry, petro logy and crystallography of speleo them s. Fo r examp le, a pure temperatu re signal has been separated ou t from the reco rds by u tilizing speleo them delta function, and the h isto ry of changing vegetation has been traced by u sing the 13 C in speleo them calcite and the variation in the pho to syn thetic pathw ay of p rairie p lan ts compared to fo rest species. T he advance has unfo lded its impo rtance in global change study. Key words: Cave drop stones; Stab le iso tope; Stalagm ite m icrobanding; T race elem en ts; Con tinen tal paleoenvironm en t1