NDLI: U-Pb and $^{39}$Ar/$^{40}$Ar dating and Sm-Nd and Pb-Pb isotopic study of the Kalguty molybdenum-tungsten ore-magmatic system, Southern Altai

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The Kalar Compex, Aldan-Stanovoi shield, an ancient anorthosite-mangerite-charnockite-granite association: Geochronologic, geochemical, and isotopic-geochemical characteristics

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Isotopic geochronology of the archean posttectonic association of sanukitoids, syenites, and granitoids in central Karelia

Neoproterozoic A-type granites of the Garevka massif, Yenisey Ridge: Age, sources, and geodynamic setting

K-Ar dating of quaternary volcanics: Methodology and interpretation of results

U-Pb and $^{39}$Ar/$^{40}$Ar dating and Sm-Nd and Pb-Pb isotopic study of the Kalguty molybdenum-tungsten ore-magmatic system, Southern Altai

Age and thermal history of the Maksyutov metamorphic complex: $^{40}$Ar/$^{39}$Ar evidence

Olivine-garnet, olivine-spinel, and orthopyroxene metamorphic rocks of the Kokchetav Massif, northern Kazakhstan

U-Pb and $^{39}$Ar/$^{40}$Ar dating and Sm-Nd and Pb-Pb isotopic study of the Kalguty molybdenum-tungsten ore-magmatic system, Southern Altai

Content Provider	Springer Nature Link
Author	Annikova, I. Yu. Vladimirov, A. G. Vystavi, S. A. Zhuravlev, D. Z. Kruk, N. N. Lepekhina, E. N. Matukov, D. I. Moroz, E. N. Palesskii, S. V. Pomarchuk, V. A. Rudnev, S. N. Sergeev, S. A.
Copyright Year	2006
Abstract	The Kalguty ore-magmatic system comprises two intrusive complexes: the Kalguty granite-leucogranite complex and Eastern Kalguty complex of dikes and small intrusions. U-Pb dating of individual zircon grains from granites of the main intrusive phase demonstrated that the crystallization age of small grains of magmatic habits and outer rims of large grains is almost concordant and is 216 ± 3 Ma. Ar-Ar isotope study shows that the K-Ar system of biotites from granites of the main phase within the Kalguty ore field was disturbed (radiogenic Ar was partially lost) and gave an age of 202 ± 1 Ma. The Ar-Ar dating of muscovites from intraore and postore dikes of the Eastern Kalguty complex devoid of signatures of postmagmatic recrystallization and superimposed greisenization gave similar ages of 205–201 Ma. This date is considered as the emplacement age of the Eastern Kalguty dikes and associated complex W-Mo-Bi-Be ore mineralization. Sm-Nd and Pb-Pb isotopic study of granites, ongonites, and elvans of the Kalguty ore-magmatic system and host rocks shows that these systems were closed. For example, recalculation of Nd isotopic ratios for corresponding ages of crystallization of magmatic systems (216 and 205 Ma) shows that ɛ$_{Nd}$(T) values decrease from −1.9 to −3.5 ... −5.08 with transition from granite-leucogranite to subvolcanic granite porphyry, ongonite, and elvan dikes with corresponding increase of model ages of protoliths from 1.0 to 1.25 Ga. Lead isotopic ratios for leaching residues of whole-rock samples of all rock varieties ($^{206}$Pb/$^{204}$Pb = 18.305–18.831; $^{207}$Pb/$^{204}$Pb = 15.527–15.571) are plotted well below the line of average crustal lead evolution according to the Stacey-Kramers model.
Starting Page	81
Ending Page	97
Page Count	17
File Format	PDF
ISSN	08695911
Journal	Petrology
Volume Number	14
Issue Number	1
e-ISSN	15562085
Language	English
Publisher	Nauka/Interperiodica
Publisher Date	2006-01-01
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Geochemistry Mineralogy
Content Type	Text
Resource Type	Article
Subject	Geochemistry and Petrology

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