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Tourmaline reference materials for the in situ analysis of oxygen and lithium isotope ratio compositions (2020)
Journal Article
Wiedenbeck, M., Trumbull, R., Rosner, M., Boyce, A., Fournelle, J., Franchi, I., …Wilke, F. (2020). Tourmaline reference materials for the in situ analysis of oxygen and lithium isotope ratio compositions. Geostandards and Geoanalytical Research, https://doi.org/10.1111/ggr.12362

Three tourmaline reference materials sourced from the Harvard Mineralogical and Geological Museum (schorl 112566, dravite 108796 and elbaite 98144), which are already widely used for the calibration of in situ boron isotope measurements, are characte... Read More about Tourmaline reference materials for the in situ analysis of oxygen and lithium isotope ratio compositions.

Barium isotopic composition of the mantle: Constraints from carbonatites (2020)
Journal Article
Li, W., Yu, H., Xu, J., Halama, R., Bell, K., Nan, X., & Huang, F. (2020). Barium isotopic composition of the mantle: Constraints from carbonatites. Geochimica et Cosmochimica Acta, 235-243. https://doi.org/10.1016/j.gca.2019.06.041

To investigate the behaviour of Ba isotopes during carbonatite petrogenesis and to explore the possibility of using carbonatites to constrain the Ba isotopic composition of the mantle, we report high-precision Ba isotopic analyses of: (1) carbonatite... Read More about Barium isotopic composition of the mantle: Constraints from carbonatites.

Insights into the magma plumbing system of La Fossa di Vulcano (Aeolian Islands, Italy) using oxygen isotopes and clinopyroxene crystal structure (2020)
Journal Article
Wiltshire, R., Halama, R., Boyce, A., Petrone, C., Nazzareni, S., Gertisser, R., …Lucchi, F. (2020). Insights into the magma plumbing system of La Fossa di Vulcano (Aeolian Islands, Italy) using oxygen isotopes and clinopyroxene crystal structure. https://doi.org/10.5194/egusphere-egu2020-13433

<jats:p> &amp;lt;p&amp;gt;The presently active La Fossa cone, Vulcano, widely considered the most hazardous volcano in the Aeolian Islands, is characterised by alternating periods of Vulcanian to subplinian explosive events and lava flow effusion. It... Read More about Insights into the magma plumbing system of La Fossa di Vulcano (Aeolian Islands, Italy) using oxygen isotopes and clinopyroxene crystal structure.

Magmatic and metasomatic effects of magma-carbonate interaction recorded in calc-silicate xenoliths from Merapi volcano (Indonesia) (2020)
Journal Article
Halama, R., Gertisser, R., Whitley, S., Preece, K., Deegan, F., & Troll, V. (2020). Magmatic and metasomatic effects of magma-carbonate interaction recorded in calc-silicate xenoliths from Merapi volcano (Indonesia). Journal of Petrology, https://doi.org/10.1093/petrology/egaa048

Magma-carbonate interaction is an increasingly recognised process occurring at active volcanoes worldwide, with implications for the magmatic evolution of the host volcanic systems, their eruptive behaviour, volcanic CO2 budgets, and economic mineral... Read More about Magmatic and metasomatic effects of magma-carbonate interaction recorded in calc-silicate xenoliths from Merapi volcano (Indonesia).

The Thickness of the Mantle Lithosphere and Collision-related Volcanism in the Lesser Caucasus (2019)
Journal Article
Sugden, P., Savov, I., Wilson, M., Meliksetian, K., Navasardyan, G., & Halama, R. (2019). The Thickness of the Mantle Lithosphere and Collision-related Volcanism in the Lesser Caucasus. Journal of Petrology, 199-230. https://doi.org/10.1093/petrology/egy111

The Lesser Caucasus mountains sit on a transition within the Arabia-Eurasia collision zone between very thin lithosphere (< 100?km) to the west, under Eastern Anatolia, and a very thick lithospheric root (up to 200?km) in the east, under western Iran... Read More about The Thickness of the Mantle Lithosphere and Collision-related Volcanism in the Lesser Caucasus.

Alkaline magmas in zones of continental convergence: The Tezhsar volcano-intrusive ring complex, Armenia (2018)
Journal Article
Sokol, K., Halama, R., Meliksetian, K., Savov, I., Navasardyan, G., & Sudo, M. (2018). Alkaline magmas in zones of continental convergence: The Tezhsar volcano-intrusive ring complex, Armenia. Lithos, 172-191. https://doi.org/10.1016/j.lithos.2018.08.028

Alkaline igneous rocks are relatively rare in settings of tectonic convergence and little is known about their petrogenesis in these settings. This study aims to contribute to a better understanding of the formation of alkaline igneous rocks by an in... Read More about Alkaline magmas in zones of continental convergence: The Tezhsar volcano-intrusive ring complex, Armenia.

Rb-Sr and in situ 40Ar/39Ar dating of exhumation-related shearing and fluid-induced recrystallization in the Sesia zone (Western Alps, Italy) (2018)
Journal Article
Konrad-Schmolke, M., Sudo, M., Halama, R., & Glodny, J. (2018). Rb-Sr and in situ 40Ar/39Ar dating of exhumation-related shearing and fluid-induced recrystallization in the Sesia zone (Western Alps, Italy). Geosphere, 1425-1450. https://doi.org/10.1130/GES01521.1

The Sesia zone in the Italian Western Alps is a piece of continental crust that has been subducted to eclogite-facies conditions and records a complex metamorphic history. The exact timing of events and the significance of geochronological informatio... Read More about Rb-Sr and in situ 40Ar/39Ar dating of exhumation-related shearing and fluid-induced recrystallization in the Sesia zone (Western Alps, Italy).

Fluid-induced breakdown of white mica controls nitrogen transfer during fluid-rock interaction in subduction zones (2016)
Journal Article
Halama, R., Bebout, G., Marschall, H., & John, T. (2016). Fluid-induced breakdown of white mica controls nitrogen transfer during fluid-rock interaction in subduction zones. International Geology Review, 702-720. https://doi.org/10.1080/00206814.2016.1233834

In order to determine the effects of fluid–rock interaction on nitrogen elemental and isotopic systematics in high-pressure metamorphic rocks, we investigated three different profiles representing three distinct scenarios of metasomatic overprinting.... Read More about Fluid-induced breakdown of white mica controls nitrogen transfer during fluid-rock interaction in subduction zones.

Volatile (H2O, CO2, Cl, S) budget of the Central American subduction zone (2014)
Journal Article
Frische, M., Rabbel, W., Hansteen, T., Hensen, C., Wehrmann, H., Kutterolf, S., …Grevemeyer, I. (2014). Volatile (H2O, CO2, Cl, S) budget of the Central American subduction zone. International Journal of Earth Sciences, 2101 -2127. https://doi.org/10.1007/s00531-014-1001-1

After more than a decade of multidisciplinary studies of the Central American subduction zone mainly in the framework of two large research programmes, the US MARGINS program and the German Collaborative Research Center SFB 574, we here review and in... Read More about Volatile (H2O, CO2, Cl, S) budget of the Central American subduction zone.