Archean U-Pb isotope age of zircon from dunite of the Nizhny Tagil massif (the Uralian Platinum Belt)

Malitch, K. N.; Efimov, A. A.; Ronkin, Yu. L.

doi:10.1134/s1028334x09050316

Cited by 24 publications

(5 citation statements)

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“…In recent time, an advance in this field has been made owing to the elaboration of methods for dating zircon grains with application of high-resolution secondary-ion mass spectrometers (SHRIMP-II). Today, these methods are used for isotope dating of not only zircons from granitoids (Rudnev et al, 2012), alkaline igneous rocks (Vrublevskii et al, 2014), and metamorphic rocks (Turkina et al, 2014) but also zircons from gabbroids (Bortnikov et al, 2008;Krasnobaev et al, 2007;Ledneva et al, 2012;Skolotnev et al, 2010;Tsukanov and Skolotnev, 2010) and ultramafites (Badanina and Malich, 2012;Fershtater et al, 2009;Knauf, 2008;Lesnov et al, 2010;Malitch et al, 2009;Oh et al, 2012;Ronkin et al, 2013).…”

Section: Results Of Isotope-geochronological Studies Of Zirconsmentioning

confidence: 98%

“…Savelieva et al (2006Savelieva et al ( , 2007 discovered and dated zircons in chromitites of the Voikar-Syn'ya mafic-ultramafic massif (Arctic Urals) and divided them into three age populations: 2852-2656, 1608, and 585 Ma. Malitch et al (2009) estimated the age of zircons from dunites of the Lower Tagil mafic-ultramafic massif (Urals) and recognized three age populations: 2852-2656, 1608, and 585 Ma. The authors believe that the age of the oldest zircons corresponds to the time of formation of the host dunites, which were earlier part of the subcontinental mantle.…”

Section: Discussionmentioning

confidence: 99%

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Polygenesis of mafic–ultramafic complexes: Isotope-geochronological and geochemical evidence from zircons of the Berezovka massif rocks (Sakhalin Island)

Lesnov

Хлестов

Gal’versen

et al. 2015

Russian Geology and Geophysics

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Results of comprehensive isotope-geochronological (U-Pb dating; SHRIMP II) and geochemical (LA-ICP-MS) studies of zircons from different rocks of the Berezovka polygenetic mafic-ultramafic massif of the East Sakhalin ophiolite association are presented. The massif includes three proximal but genetically autonomous structure-lithologic complexes of different ages: protrusion of ultramafic rocks of restite nature, gabbroid intrusion breaking through it, and contact reaction zone located along their boundaries. The isotopic age of zircons in the massif as a whole and in its individual rocks varies over a broad range of values. The zircons belong to several populations according to their age (Ma) and other features: relict and xenogenous (~3100-990, 70-410, and ~395-210) and syngenetic (~200-100, ~90-65, and ~30-20). They differ in grain size and morphology, optical and cathodoluminescence images, and trace-element patterns. By morphology, the grains are divided into short-prismatic crystals with well-developed faces and edges, long-prismatic crystals with well-developed faces and edges, prismatic crystals with slightly resorbed faces and edges, prismatic crystals with strongly resorbed faces and edges, and intensely resorbed grains totally or partly lacking faceting. The ages of zircons depend inversely on the contents of La, Ce, and Yb, total contents of REE, (Ce/Ce*) n , and (Eu/Eu*) n . Some grains are characterized by abnormal REE and trace-element patterns due to their epigenetic redistribution. The wide scatter of the intermediate ages of relict and xenogenous zircon grains, their resorption and disturbed optical and geochemical features are probably due to the nonuniform rejuvenation of their isotope systems and variations in other parameters, caused by the effect of younger mafic melt and its fluids, whose crystallization gave rise to a gabbroid intrusion dated at 170-150 Ma. The obtained data on the isotopic age and other properties of zircons from the rocks of the Berezovka massif agree with the geological model of its polygenesis.

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Section: Results Of Isotope-geochronological Studies Of Zirconsmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

Polygenesis of mafic–ultramafic complexes: Isotope-geochronological and geochemical evidence from zircons of the Berezovka massif rocks (Sakhalin Island)

Lesnov

Хлестов

Gal’versen

et al. 2015

Russian Geology and Geophysics

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“…It was demonstrated in previous studies [1,4,7] that zircon from dunites of the Nizhnii Tagil massif was polychronous, and its ages formed the following groups: (I) 2852 ± 59-2656 ± 21 Ma; (II) 1608 ± 56-564 ± 19 Ma; (III) 495 ± 10-463 ± 7 Ma. Zircon of group I is interpreted either as a relict related to the age of the mantle substrate [1] or as newly formed close to the time of dunite generation in the mantle [4].…”

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confidence: 95%

“…This also regards the age data obtained by different isotope methods, which range from the Archean to the Carboniferous [1,[4][5][6][7]. To confirm the geochronological interpretation of the results of U-Pb dating of zircon (SHRIMP) from dunite and clinopyroxenite of the Nizhnii Tagil and gabbro of the Volkovskii massifs in the UPB (Fig.…”

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confidence: 99%

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Isotope geochemical characteristics of zircon from dunite, clinopyroxenite, and gabbro of the Uralian Platinum Belt

et al. 2012

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Lead isotopic systematics of massive sulphide deposits in the Urals: Applications for geodynamic setting and metal sources

Tessalina

Herrington

Taylor

et al. 2016

Ore Geology Reviews

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Please cite this article as: Tessalina, Svetlana G., Herrington, Richard J., Taylor, Rex N., Sundblad, Krister, Maslennikov, Valery V., Orgeval, Jean-Jacques, Lead isotopic systematics of massive sulphide deposits in the Urals: applications for geodynamic setting and metal sources, Ore Geology Reviews (2015Reviews ( ), doi: 10.1016Reviews ( /j.oregeorev.2015 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.A C C E P T E D M A N U S C R I P T Pb reflects the averaged U/Pb ratio in the lead source), progressively increasing stratigraphically upwards to 9.4 in the cross-section of the ore-hosting Baymak-Buribai Formation. The range of age-corrected uranogenic lead isotopic ratios of the volcanic and sedimentary ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT

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Archean U-Pb isotope age of zircon from dunite of the Nizhny Tagil massif (the Uralian Platinum Belt)

Cited by 24 publications

References 5 publications

Polygenesis of mafic–ultramafic complexes: Isotope-geochronological and geochemical evidence from zircons of the Berezovka massif rocks (Sakhalin Island)

Polygenesis of mafic–ultramafic complexes: Isotope-geochronological and geochemical evidence from zircons of the Berezovka massif rocks (Sakhalin Island)

Isotope geochemical characteristics of zircon from dunite, clinopyroxenite, and gabbro of the Uralian Platinum Belt

Lead isotopic systematics of massive sulphide deposits in the Urals: Applications for geodynamic setting and metal sources

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