THE ZIRCON CHRONOLOGY OF THE INTRUSIVE MAGMATISM OF THE KANIN PENINSULA
The Kanin Peninsula is an elevated block of the Timan Ridge where Precambrian sedimentary-metamorphic sequences and magmatic rocks, intruding them, form the Kanin Kamen Ridge. In the northwestern part of the Peninsula on the coast of the Barents Sea, there is a unique outcrop of two-mica granites...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Sergo Ordzhonikidze Russian State University for Geological Prospecting
2018-08-01
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| Series: | Известия высших учебных заведений: Геология и разведка |
| Subjects: | |
| Online Access: | https://www.geology-mgri.ru/jour/article/view/309 |
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| Summary: | The Kanin Peninsula is an elevated block of the Timan Ridge where Precambrian sedimentary-metamorphic sequences and magmatic rocks, intruding them, form the Kanin Kamen Ridge. In the northwestern part of the Peninsula on the coast of the Barents Sea, there is a unique outcrop of two-mica granites, monzonitoids and lamprophyres cutting metaterrigenous rocks of the Upper Riphean Tabuyev series and overlain by Lower Permian limestones. To establish the age of magmatic rocks, U-Pb dating of zircons has been carried out by secondary ion mass spectrometry (SIMS) method. In zircons from granites, an age of 883 ± 16 Ma has been obtained, which corresponds to the beginning of the Late Riphean, and the subsynchronous formation of subalkaline rocks occurred in the Late Cambrian. The age of monzogabbro is 505 ± 7 Ma, and lamprophyres – 504±7Ma. |
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| ISSN: | 0016-7762 2618-8708 |