Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Capabilities and constraints of the Pb-Pb dating of metamorphogenic minerals using the step-leaching method. / Levchenkov, O. A.; Rizvanova, N. G.; Makeev, A. F.; Baltybaev, Sh K.; Levskii, L. K.
в: Geochemistry International, Том 47, № 11, 12.2009, стр. 1053-1066.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Capabilities and constraints of the Pb-Pb dating of metamorphogenic minerals using the step-leaching method
AU - Levchenkov, O. A.
AU - Rizvanova, N. G.
AU - Makeev, A. F.
AU - Baltybaev, Sh K.
AU - Levskii, L. K.
N1 - Funding Information: This study was financially supported by the Russian Foundation for Basic Research, project nos. 05-05-65308, 07-05-00584, and 06-05-64486 and Project no. 8 (Isotopic Systems and Isotope Fractionation) of the Department of Earth Sciences of the Russian Academy of Sciences.
PY - 2009/12
Y1 - 2009/12
N2 - Based on particular examples, this paper considers the capabilities and constraints of the step-leaching Pb-Pb dating (PbSL) of metamorphogenic minerals. It was shown that stepwise leaching allows the separation of fractions enriched in uranogenic and thorogenic Pb isotopes, which can be used for the determination of mineral ages and the time of crystallization of coexisting equilibrium and, occasionally, disequilibrium monazites. The presence of monazite in a mineral is indicated by a high Th/U ratio similar to that of monazite. The main limitation of the method is related to the presence in minerals of both disequilibrium domains of the mineral matrix and disequilibrium monazite microinclusions. By the example of minerals studied, we discussed three scenarios for the development of the U-Th-Pb isotopic systems of metamorphogenic minerals.
AB - Based on particular examples, this paper considers the capabilities and constraints of the step-leaching Pb-Pb dating (PbSL) of metamorphogenic minerals. It was shown that stepwise leaching allows the separation of fractions enriched in uranogenic and thorogenic Pb isotopes, which can be used for the determination of mineral ages and the time of crystallization of coexisting equilibrium and, occasionally, disequilibrium monazites. The presence of monazite in a mineral is indicated by a high Th/U ratio similar to that of monazite. The main limitation of the method is related to the presence in minerals of both disequilibrium domains of the mineral matrix and disequilibrium monazite microinclusions. By the example of minerals studied, we discussed three scenarios for the development of the U-Th-Pb isotopic systems of metamorphogenic minerals.
UR - http://www.scopus.com/inward/record.url?scp=74549217854&partnerID=8YFLogxK
U2 - 10.1134/S0016702909110019
DO - 10.1134/S0016702909110019
M3 - Article
AN - SCOPUS:74549217854
VL - 47
SP - 1053
EP - 1066
JO - Geochemistry International
JF - Geochemistry International
SN - 0016-7029
IS - 11
ER -
ID: 93114667