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Radiometric age and geochemistry of the Verkhneurmi massif granite (the Amur region, Far East). / Krivovichev, V.G.; Brusnitsyn, A.I.; Zaitsev, A.N.
In: Geochemistry International, Vol. 34, No. 2, 1996, p. 91-96.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Radiometric age and geochemistry of the Verkhneurmi massif granite (the Amur region, Far East)
AU - Krivovichev, V.G.
AU - Brusnitsyn, A.I.
AU - Zaitsev, A.N.
N1 - RADIOMETRIC AGE AND GEOCHEMISTRY OF THE VERKHNEURMI MASSIF GRANITE (THE AMUR REGION, FAR EAST) KRIVOVICHEV V.G.*1, BRUSNITSYN A.I.1, ZAITSEV A.N.1 1 Geological Faculty, St. Petersburg State University, Universitetskaya nab. 7/9 Тип: статья в журнале - научная статья Язык: английский Том: 34Номер: 2 Год: 1996 Страницы: 91-96 ЖУРНАЛ: GEOCHEMISTRY INTERNATIONAL Издательство: Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд) (Род-Таун) ISSN: 0016-7029eISSN: 1531-8397
PY - 1996
Y1 - 1996
N2 - A radiometric age of 83.4 ±3.2 Ma and initial 87Sr/86Sr of 0.75058 ±0.00068, indicative of sialic matter melting in the upper or middle crust, were established by the Rb-Sr method for the Verkhneurmi massif granite. From the early to the late emplacement phases, the granite is shown to become progressively enriched in Na + K, Li, Rb, Cs, Nb, Y, Yb, W, Sn, and F, and depleted in Ti, Fe, Mg, Ca, Ba, Sr, and Mo. Significant correlations were established between the alumina coefficient [Al2O3/(FeO + Fe2O3 + MgO)], total alkali content (Na2O + K2O), and fractionation degree of the granite [lg (Rb/Ba)]. The most differentiated rock of the massif is the Li-F-leucogranite, which is the likely source of the fluids responsible for metasomatic reworking of rhyolite and granite to produce the Sn-bearing quartz-topaz-siderophyllite greisen of the Pravourmi deposit.
AB - A radiometric age of 83.4 ±3.2 Ma and initial 87Sr/86Sr of 0.75058 ±0.00068, indicative of sialic matter melting in the upper or middle crust, were established by the Rb-Sr method for the Verkhneurmi massif granite. From the early to the late emplacement phases, the granite is shown to become progressively enriched in Na + K, Li, Rb, Cs, Nb, Y, Yb, W, Sn, and F, and depleted in Ti, Fe, Mg, Ca, Ba, Sr, and Mo. Significant correlations were established between the alumina coefficient [Al2O3/(FeO + Fe2O3 + MgO)], total alkali content (Na2O + K2O), and fractionation degree of the granite [lg (Rb/Ba)]. The most differentiated rock of the massif is the Li-F-leucogranite, which is the likely source of the fluids responsible for metasomatic reworking of rhyolite and granite to produce the Sn-bearing quartz-topaz-siderophyllite greisen of the Pravourmi deposit.
M3 - Article
VL - 34
SP - 91
EP - 96
JO - Geochemistry International
JF - Geochemistry International
SN - 0016-7029
IS - 2
ER -
ID: 5034091