دورية أكاديمية
Vendian age of igneous rocks of the Chamberlain valley area (Northern part of the Wedel Jarlsberg Land, Svalbard Archipelago)
| العنوان: | Vendian age of igneous rocks of the Chamberlain valley area (Northern part of the Wedel Jarlsberg Land, Svalbard Archipelago) |
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| المؤلفون: | Aleksandr N. Sirotkin, Aleksandr N. Evdokimov |
| المصدر: | Записки Горного института, Vol 255, Pp 419-434 (2022) |
| بيانات النشر: | Saint-Petersburg Mining University, 2022. |
| سنة النشر: | 2022 |
| المجموعة: | LCC:Mining engineering. Metallurgy |
| مصطلحات موضوعية: | svalbard, sedimentary-volcanogenic complex, basic magmatism, peridotites, gabbro, metavolcanic, the vendian, the middle riphean, zircon, absolute age, Mining engineering. Metallurgy, TN1-997 |
| الوصف: | The geological structure, structural relations with the underlying complexes, mineral composition, age and origin of sedimentary-volcanogenic and intrusive formations of the Chamberlain valley area (northern part of the Wedel Jarlsberg Land, Svalbard Archipelago) are considered. As a result of the studies, two stages of the Late Precambrian endogenous activity in this area have been identified. For the first time the Vendian ages (593-559 Ma) of intrusive (dolerites) and effusive (basalts, andesites, tuffs) rocks were determined by U-Pb-method (SHRIMP-II) for Svalbard Archipelago. At the same time, the Grenville ages for large bodies of gabbro-diorites, metadolerites bodies (1152-967 Ma), and metagranites (936 Ma) were determined for the first time for this area, which correlates well with the ages of magmatic formations obtained earlier in the southern part of Wedel Jarlsberg Land. A detailed petrographic and petrochemical characterization of all the described objects were compiled and the paleotectonic conditions of their formation were reconstructed. Based on these data, the Chemberlendalen series, which is dated to the Late Vendian, and the Rechurchbreen series, which the authors attribute to the Middle Riphean and correlate with the lower part of the Nordbucht series are distinguished. The data obtained indicate a two-stage Precambrian magmatism in this area of the Svalbard archipelago and, most importantly, provide evidence for the first time ever of endogenous activity on Svalbard in the Vendian time. This fact makes it possible to reconsider in the future the history of the formation of folded basement of the Svalbard archipelago and the nature of the geodynamic conditions in which it was formed. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English Russian |
| تدمد: | 2411-3336 2541-9404 |
| Relation: | https://pmi.spmi.ru/index.php/pmi/article/view/14654?setLocale=en_US; https://doaj.org/toc/2411-3336; https://doaj.org/toc/2541-9404 |
| DOI: | 10.31897/PMI.2022.20 |
| URL الوصول: | https://doaj.org/article/017ac6daf2ed472dbaeb0543a5b87a51 |
| رقم الأكسشن: | edsdoj.017ac6daf2ed472dbaeb0543a5b87a51 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 24113336 25419404 |
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| DOI: | 10.31897/PMI.2022.20 |