دورية أكاديمية
Do Pegmatites Crystallise Fast? A Perspective from Petrologically-Constrained Isotopic Dating
| العنوان: | Do Pegmatites Crystallise Fast? A Perspective from Petrologically-Constrained Isotopic Dating |
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| المؤلفون: | Daniil V. Popov |
| المصدر: | Geosciences, Vol 13, Iss 10, p 297 (2023) |
| بيانات النشر: | MDPI AG, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Geology |
| مصطلحات موضوعية: | pegmatite, rate of crystallisation, geochronology, Geology, QE1-996.5 |
| الوصف: | Most recent studies consider the formation of individual pegmatite bodies to be a fast process with estimated crystal growth rates reaching a walloping 10 m/day. This opinion is presumably underpinned by the traditional way of thinking of them as the end products of magmatic fractionation. Indeed, modelling has shown that if a pegmatite-forming substance with a temperature near granitic solidus intrudes into a much colder host rock, as recorded in some outcrops, it must cool rapidly. From here, a conclusion is made that the crystallisation must likewise be rapid. However, this view is challenged by several studies that published isotopic dates supported by petrological characterisation of the analysed materials, which suggested or can be used to suggest that some minerals in pegmatites grew over millions of years. Surprisingly, such in-depth work on the geochronology of individual pegmatite bodies is relatively uncommon, so it is early to make generalisations. Here, I highlight some of the existing evidence with the aim to stimulate further research into the timescales of pegmatite crystallisation, including the use of petrologically constrained isotopic dating. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 13100297 2076-3263 |
| Relation: | https://www.mdpi.com/2076-3263/13/10/297; https://doaj.org/toc/2076-3263 |
| DOI: | 10.3390/geosciences13100297 |
| URL الوصول: | https://doaj.org/article/c7441ef0d7aa45979d28dbce6854e221 |
| رقم الأكسشن: | edsdoj.7441ef0d7aa45979d28dbce6854e221 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 13100297 20763263 |
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| DOI: | 10.3390/geosciences13100297 |