Academic Journal
Duration of partial melting in the lower crust of the Limpopo collisional belt
| العنوان: | Duration of partial melting in the lower crust of the Limpopo collisional belt |
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| المؤلفون: | Nicoli, Gautier, Mukherjee, Shreya, van Schijndel, Valby, Stevens, Gary |
| المصدر: | Terra Nova ; volume 35, issue 4, page 267-275 ; ISSN 0954-4879 1365-3121 |
| بيانات النشر: | Wiley |
| سنة النشر: | 2023 |
| المجموعة: | Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: | In convergent settings, the duration of partial melting in the lower continental crust dictates how lateral shortening is accommodated by the colliding plates. Here we use the example of the ca. 2700 Ma Southern Marginal Zone of the Limpopo Belt, South Africa, to accurately time the different steps of the granulite facies metamorphic event. We date garnet crystallisation in K‐poor leucosomes using Sm–Nd garnet isotopic data to have occurred at 2734 ± 9 Ma. Following deposition of the protolith and rapid burial, the crust remained molten for 17 ± 14 Ma. This estimate is within error similar to the 24 ± 12 Ma proposed for rocks that have evolved along a Barrovian P–T path. Our results suggest that the Southern Marginal Zone is the result of a collision between a large island arc or a continent with the Kaapvaal Craton, at a time global of geodynamic changes. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1111/ter.12651 |
| الاتاحة: | http://dx.doi.org/10.1111/ter.12651 https://onlinelibrary.wiley.com/doi/pdf/10.1111/ter.12651 |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| رقم الانضمام: | edsbas.DAE93D9E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1111/ter.12651 |
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