Хубанов В.Б., Буянтуев М.Д., Звонцов И.В

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U-P b LA-ICP-MS : . .., .., .. , -, khubanov @ mail . ru. U - Th -P b . , 1989. - PowerPoint PPT Presentation

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U-Pb LA-ICP-MS :

U-Pb LA-ICP-MS :

.., .., .. , -, khubanov@mail.ru

, 1989U-Th-Pb U-Pb TIMS+

- -

- LA-ICP-MS+ (40 15)

+

+

+

-

SIMS (SHRIMP)+ (5 2)

+

+

-

- ,

LA-ICP-MS

-+ + -- - () -+ + -

-+ - - --

(UP-213): , 213

-

~1/

- Element XR 2. 3. 4. 5. 6. 1.

:

Plesovice (T=337,3 Ma, U=465-3084 ppm, Pb(rad)=21-158) (Slama et al., 2008).

Temora 2 (T=417 Ma, U= 82-320 ppm, Pb(rad)=14,3) (Black et al., 2004).

GJ (T=609 Ma, U= 212-422 ppm, Pb(rad)=19,3-37,4) (Jackson et al., 2004).

: NIST 612IMGREBelousovaGinLa0,040,00Ce25,2430,5729,31Pr0,620,422,08Nd1,671,794,64Sm13,6411,8222,08Eu19,8219,1327,58Gd38,2839,0654,33Tb59,5556,6166,76Dy104,2989,73115,31Ho167,72133,51169,31Er240,36195,18251,81Tm363,14281,92390,47Yb546,94431,25860,69Lu669,55508,07677,43

REE GJPLSPLSGinLa1,311,840,80Ce4,2311,294,24Pr3,537,372,53Nd6,3314,565,48Sm29,2259,7428,98Eu20,6839,6415,47Gd71,95141,9589,42Tb152,20288,38137,42Dy240,06440,77234,36Ho301,59546,74272,08Er355,42602,41309,95Tm413,90679,42370,00Yb490,61763,17750,34Lu385,98590,78299,72

Plesovice REE

18.04.1322.04.1706.05.13Plesovice 337, 3 .

University of Bergenweighted mean 206Pb/238U:338.5 1.6 Ma (MSWD = 1.19)(61 analyses)

Memorial University of Newfoundlandweighted mean 206Pb/238U:335.4 1.0 Ma (MSWD = 0.18)(48 analyses)

JWG University of Frankfurt am Mainweighted mean 206Pb/238U:337.8 1.0 Ma (MSWD = 0.87)(42 analyses)Pleovice zircon laser ablation ICP-MS U-Pb dating (Slama et al., 2008)

GJ-124.04.1306.05.13 609 . Temora-2

417 .

I1I, cpsU, v U1 I2 U2 I1 > I2 U1 = U2

Koch et al., 2008LA-ICP-MS U-Pb .

- , , U-Pb .

ICP-MS Element XR LA UP-213, , .

U-Pb .