Yurchik Massifs in Kamchatka: Age and affiliation to magmatic associations

This study aims at summarizing available geological and geochemical data on known Proterozoic platinum-bearing ultramafic-mafic massifs in the south of Siberia. Considering new data on geochemistry and geochronology of some intrusions, it was feasible to compare ore-bearing complexes of different time spans and areas and to follow their relationships with the recognized large igneous provinces. In the south of Siberia, the platinum-bearing massifs might be united into three age groups: Late Paleoproterozoic (e.g., Chiney complex, Malozadoisky massif), Late Mesoproterozoic (e.g., Srednecheremshansky massif), and Neoproterozoic (e.g., Kingash complex, Yoko-Dovyren massif, and massifs in the center of the East Sayan Mts.). In most massifs but Chiney the initial magmas are magnesium-rich. On paleogeodynamic reconstructions, the position of the studied massifs is the evidence that three most precisely dated events in North Canada continued into southern Siberia: In the period 1880–1865 Ma, it was the Ghost–Mara River–Morel LIP; at 1270–1260 Ma, the Mackenzie LIP; and at 725–720 Ma, Franklin LIP. In Siberia, the mostly productive massifs with respect to PGE–Ni–Cu mineralization are those linked with the Franklin LIP: Verkhny Kingash, Yoko-Dovyren, and central part of the Eastern Sayan Mountains, e.g., Tartay, Zhelos, and Tokty-Oy.

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Relationship between platinum-bearing ultramafic–mafic intrusions and large igneous provinces (exemplified by the Siberian Craton)

Мехоношин

Ernst

Hamilton

et al. 2016

Russian Geology and Geophysics

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Geochemistry of granitization and magmatic replacement of basic volcanic rocks in the contact aureole of the Yurchik gabbronorite intrusion, Ganal Range, Kamchatka

et al. 2013

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Age Ranges of Zircons in the Kamchatka–Koryak Region (according to Zircon Geochronology)

Badredinov,

Markovsky

2024

Russ. J. of Pac. Geol.

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Yurchik Massifs in Kamchatka: Age and affiliation to magmatic associations

Cited by 3 publications

References 4 publications

Relationship between platinum-bearing ultramafic–mafic intrusions and large igneous provinces (exemplified by the Siberian Craton)

Relationship between platinum-bearing ultramafic–mafic intrusions and large igneous provinces (exemplified by the Siberian Craton)

Geochemistry of granitization and magmatic replacement of basic volcanic rocks in the contact aureole of the Yurchik gabbronorite intrusion, Ganal Range, Kamchatka

Age Ranges of Zircons in the Kamchatka–Koryak Region (according to Zircon Geochronology)

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