Experimental production of K-rich metasomes through sediment recycling at the slab-mantle interface in the fore-arc
Објеката
- Тип
- Рад у часопису
- Верзија рада
- објављена верзија
- Језик
- енглески
- Креатор
- Fatma Gülmez, Dejan Prelević, Michael W. Förster, Stephan Buhre, Jennifer Günther
- Извор
- Scientific Reports
- Датум издавања
- 2023
- Сажетак
- Sediment contribution to the mantle is the key step for the generation of orogenic magmatism to produce its isotopic and geochemical inventory. Even though they are exceptional for the post-collisional settings, there are worldwide examples of arc-related ultrapotassic mafic magmas which require complex multi-stage processes along with sediment melting e.g. in Italy or Pontides of Türkiye. To understand the metasomatism leading mantle to produce ultrapotassic mafic melts, we simulated the reactions of depleted (harzburgite) and fertile (lherzolite) mantle with subducted carbonate-rich sediment at relatively cold (800–850 °C) and shallow (2 GPa, 60–80 km) slab-mantle interfaces. The melting of sediments can trigger the formation of immiscible and conjugate carbonatitic and silicic melts which flux the mantle to develop hydrous minerals and dolomitic melt. The metasomatic growth product is a wehrlite composed of clinopyroxene, phlogopite, carbonate minerals and amphibole, representing a source of choice for Si-undersaturated ultrapotassic lavas. The occurrence of conjugate carbonatitic and silicic melts and their potential physical separation, offer a possibility for fractionation of several canonical trace element ratios such as Th/La, observed in Si-saturated ultrapotassic lavas. The synergy between peridotite-melt interaction and the physical separation of the carbonatitic and extremely K-enriched silicic melts are essential for the compositional evolution of ultrapotassic orogenic magmas and their mantle sources.
- Број
- 19608 (2023)
- issn
- 2045-2322
- Subject
- alkalni vulkanizam, eksperimentalna petrologija, recikliranje sedimenata, metasomatizam omotača
- alkaline volcanism, experimental petrology, sediment recycling, mantle metasomatism
- Шира категорија рада
- M20
- Ужа категорија рада
- М21
- Је дио
- RECON TETHYS - 7744807
- Права
- Отворени приступ
- Лиценца
- All rights reserved
- Формат
- Медија
s41598-023-46367-7.pdf
Fatma Gülmez, Dejan Prelević, Michael W. Förster, Stephan Buhre, Jennifer Günther . "Experimental production of K-rich metasomes through sediment recycling at the slab-mantle interface in the fore-arc" in Scientific Reports (2023)
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