All Outputs (8)

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.

Deciphering the Jurassic–Cretaceous evolution of the Hamadan metamorphic complex during Neotethys subduction, western Iran (2020)
Journal Article
Halama. (2020). Deciphering the Jurassic–Cretaceous evolution of the Hamadan metamorphic complex during Neotethys subduction, western Iran. International Journal of Earth Sciences, https://doi.org/10.1007/s00531-020-01893-x

The Hamadan high-grade metapelites in the northwestern part of the Sanandaj–Sirjan zone, Iran, show a polymetamorphic evolution with relics of a garnet-bearing metamorphic mineral assemblage (M1), a contact metamorphic overprint (M2) related to the e... Read More about Deciphering the Jurassic–Cretaceous evolution of the Hamadan metamorphic complex during Neotethys subduction, western Iran.

Pinched between the plates: Armenia's voluminous record of volcanic activity (2020)
Journal Article
Halama, R., Meliksetian, K., Savov, I., Sugden, P., & Sokół, K. (2020). Pinched between the plates: Armenia's voluminous record of volcanic activity. Geology Today, 101 - 108. https://doi.org/10.1111/gto.12309

Located in the heart of the Lesser Caucasus mountains, where the Arabian and Eurasian tectonic plates collide, Armenia occupies an exceptional geological position shaped through millions of years of subduction and collision. It is a unique place on t... Read More about Pinched between the plates: Armenia's voluminous record of volcanic activity.

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

<p>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 has for... 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).

Boron isotope insights into the origin of subduction signatures in continent-continent collision zone volcanism (2020)
Journal Article
Sugden, P., Savov, I., Agostini, S., Wilson, M., Halama, R., & Meliksetian, K. (2020). Boron isotope insights into the origin of subduction signatures in continent-continent collision zone volcanism. Earth and Planetary Science Letters, https://doi.org/10.1016/j.epsl.2020.116207

We present the first boron abundance and delta B-11 data for young (1.5-0 Ma) volcanic rocks formed in an active continent-continent collision zone. The delta B-11 of post-collisional volcanic rocks (-5 to +2 parts per thousand) from the Armenian sec... Read More about Boron isotope insights into the origin of subduction signatures in continent-continent collision zone volcanism.

Boron isotope record of peak metamorphic ultrahigh-pressure and retrograde fluid-rock interaction in white mica (Lago di Cignana, Western Alps) (2020)
Journal Article
Halama, Konrad-Schmolke, M., & De Hoog, J. (2020). Boron isotope record of peak metamorphic ultrahigh-pressure and retrograde fluid-rock interaction in white mica (Lago di Cignana, Western Alps). Contributions to Mineralogy and Petrology, https://doi.org/10.1007/s00410-020-1661-8

This study presents boron (B) concentration and isotope data for white mica from (ultra)high-pressure (UHP), subduction-related metamorphic rocks from Lago di Cignana (Western Alps, Italy). These rocks are of specific geological interest, because the... Read More about Boron isotope record of peak metamorphic ultrahigh-pressure and retrograde fluid-rock interaction in white mica (Lago di Cignana, Western Alps).