-. [15, 20]: 1) ; 2) ; 3) -, ; 4) - ; 5) .
1 2 (Neumann et al., 1954; , 1965, 1975; Gast, 1968; Shaw, 1970; Greenland, 1970; Allegre & Minster, 1978 .) . 3, 4 5. [5, 15, 20, 21, 30, 35 .] , [ (Ap), (Zrn) (Mnz)] ( Y) .
(, -, ) (1,71,8 . ) () - (Li, Be, Nb, Ta, Zr, W, Sn, Mo, Zn, Pb, Cu, Bi, Cd) - (), - . [15, 20, 21, 30 .] :
1. (. 6) (Neumann et al., 1954; , 1965, 1975; Shaw, 1970; Greenland, 1970; Allegre & Minster, 1978 ) (1), / (2), (3), (4). , (, ). (Rb Sr) (, 1975; ., 1984 .) :
D Rb= 0,5 D Sr= 2,0, D Rb= 0,1 D Sr= 2,0, D Rb= 0,1 D Sr= 0,1 , , . (1), (, , ). (, 1975) ln C Sr (ln C Ba) ln C Rb ,
|
|
. 6. 쳿 Sr Rb , ( ., 1984; , 1988) ( ., 1987) ( ) . Rbmin , Srmin Srmax , Rbmax Rb Sr . .
2. ( ) ( ) Rb (C Rb) D Rb = 0,5 (, 1975; ., 1984 .; [15]). Rb () (169 ppm) . - () (i) () , , () (. 7 9, ) , Di. , .
3. (. 7) , (Zrn) (Ap). (Mnz) (Xnt) , Zrn+Ap, Zrn+Mnz, Zrn+Xnt . Zrn+Ap (Tmodel) () (Watson & Harrison, 1983; Harrison & Watson, 1984) Ap Zrn: ; , ; , , , Zr P Zrn, Ap ; ( ); ; (K). Zrn+Mnz Zrn+Xnt , Ap . .
4. () f = 0,185 ( Ap Mnz Zrn) Tmodel , C LREE Mnz (Montel, 1993), , : , LREE (La Gd Eu), , ( ), (. %) (), (K). , Tmodel , , = 2,36 . %, (, 1975) (f = 1) Tmodel = 900 o Ptotal ~6,3 [ ~18-20 , (Starostenko et al., 2002) ], H2O (. 9), - .
|
|
5. / (, ) , (f = 0,165) H2O (. 9) , , [21] :
,
, , , . , ( = ) . [21] () . [21] (. 10, ) () [ (, , 1985)], - 䳿 : , / [ ( ., 1984)], . dz [21] (. 10, ), ' , .
. 10. - : Zn+Pb+Nb (CF ) ; - (M) . L Zn+Pb+Nb
; 1 2 Zn+Pb+Nb; .
6. - Tmodel , . ' Zrn Ap, . Tmodel . (; Y Ap Zrn) [15, 35], (. 11, ), [20] T ():
(3) ,
. (. 8) (. 11, ) (T ) Tmodel (T ) . (. 8), , , . , .
|
|
2. - - - ( , , Ptotal , , , , ), .