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Slab mantle dehydrates beneath Kamchatka – yet recycles water into the deep mantle (2016)
Journal Article
Konrad-Schmolke, M., Halama, R., & Manea, V. (2016). Slab mantle dehydrates beneath Kamchatka – yet recycles water into the deep mantle. Geochemistry, Geophysics, Geosystems, 2987-3007. https://doi.org/10.1002/2016GC006335

The subduction of hydrated slab mantle is the most important and yet weakly constrained factor in the quantification of the Earth's deep geologic water cycle. The most critical unknowns are the initial hydration state and the dehydration behavior of... Read More about Slab mantle dehydrates beneath Kamchatka – yet recycles water into the deep mantle.

Magnesium isotope fractionation during carbonatite magmatism at Oldoinyo Lengai, Tanzania (2016)
Journal Article
Li, W., Teng, F., Halama, R., Keller, J., & Klaudius, J. (2016). Magnesium isotope fractionation during carbonatite magmatism at Oldoinyo Lengai, Tanzania. Earth and Planetary Science Letters, 26 -33. https://doi.org/10.1016/j.epsl.2016.03.034

To investigate the behaviour of Mg isotopes during carbonatite magmatism, we analyzed Mg isotopic compositions of natrocarbonatites and peralkaline silicate rocks from Oldoinyo Lengai, Tanzania. The olivine melilitites from the vicinity of Oldoinyo L... Read More about Magnesium isotope fractionation during carbonatite magmatism at Oldoinyo Lengai, Tanzania.

Retrograde metasomatic effects on phase assemblages in an interlayered blueschist-greenschist sequence (Coastal Cordillera, Chile) (2015)
Journal Article
Halama, R., & Konrad-Schmolke, M. (2015). Retrograde metasomatic effects on phase assemblages in an interlayered blueschist-greenschist sequence (Coastal Cordillera, Chile). Lithos, 31 -47. https://doi.org/10.1016/j.lithos.2014.12.004

Interlayered blueschists and greenschists of the Coastal Cordillera (Chile) are part of a Late Palaeozoic accretionary complex. They represent metavolcanic rocks with oceanic affinities based on predominantly OIB-type REE patterns and immobile trace... Read More about Retrograde metasomatic effects on phase assemblages in an interlayered blueschist-greenschist sequence (Coastal Cordillera, Chile).

Nitrogen recycling in subducted mantle rocks and implications for the global nitrogen cycle (2014)
Journal Article
Halama, R., Bebout, G., John, T., & Scambelluri, M. (2014). Nitrogen recycling in subducted mantle rocks and implications for the global nitrogen cycle. International Journal of Earth Sciences, 2081 - 2099. https://doi.org/10.1007/s00531-012-0782-3

The nitrogen concentrations [N] and isotopic compositions of ultramafic mantle rocks that represent various dehydration stages and metamorphic conditions during the subduction cycle were investigated to assess the role of such rocks in deep-Earth N c... Read More about Nitrogen recycling in subducted mantle rocks and implications for the global nitrogen cycle.

Combined thermodynamic-geochemical modeling in metamorphic geology: Boron as tracer of fluid-rock interaction (2014)
Journal Article
Konrad-Schmolke, M., & Halama, R. (2014). Combined thermodynamic-geochemical modeling in metamorphic geology: Boron as tracer of fluid-rock interaction. Lithos, 393 -414. https://doi.org/10.1016/j.lithos.2014.09.021

Quantitative geochemical modeling is today applied in a variety of geological environments from the petrogenesis of igneous rocks to radioactive waste disposal. In addition, the development of thermodynamic databases and computer programs to calculat... Read More about Combined thermodynamic-geochemical modeling in metamorphic geology: Boron as tracer of fluid-rock interaction.

Vesuvianite in high-pressure-metamorphosed oceanic lithosphere (Raspas Complex, Ecuador) and its role for transport of water and trace elements in subduction zones (2014)
Journal Article
Halama, R., Savov, I. P., Garbe-Schönberg, D., Schenk, V., & Toulkeridis, T. (2014). Vesuvianite in high-pressure-metamorphosed oceanic lithosphere (Raspas Complex, Ecuador) and its role for transport of water and trace elements in subduction zones. European Journal of Mineralogy, 25(6), 1039-1039. https://doi.org/10.1127/0935-1221/2013/0025-2361

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., Halama, R., Freundt, A., & 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.

Effects of fluid-rock interaction on Ar-40/Ar-39 geochronology in high-pressure rocks (Sesia-Lanzo Zone, Western Alps) (2014)
Journal Article
Halama, R., Konrad-Schmolke, M., Sudo, M., Marschall, H., & Wiedenbeck, M. (2014). Effects of fluid-rock interaction on Ar-40/Ar-39 geochronology in high-pressure rocks (Sesia-Lanzo Zone, Western Alps). Geochimica et Cosmochimica Acta, 475 -494. https://doi.org/10.1016/j.gca.2013.10.023

In situ UV laser spot 40Ar/39Ar analyses of distinct phengite types in eclogite-facies rocks from the Sesia-Lanzo Zone (Western Alps, Italy) were combined with SIMS boron isotope analyses as well as boron (B) and lithium (Li) concentration data to li... Read More about Effects of fluid-rock interaction on Ar-40/Ar-39 geochronology in high-pressure rocks (Sesia-Lanzo Zone, Western Alps).

Crystallization conditions and petrogenesis of the lava dome from the ∼900 years BP eruption of Cerro Machín Volcano, Colombia (2013)
Journal Article
Laeger, K., Halama, R., Hansteen, T., Savov, I. P., Murcia, H. F., Cortés, G. P., & Garbe-Schönberg, D. (2013). Crystallization conditions and petrogenesis of the lava dome from the ∼900 years BP eruption of Cerro Machín Volcano, Colombia. Journal of South American Earth Sciences, 48, 193-208. https://doi.org/10.1016/j.jsames.2013.09.009

The last known eruption at Cerro Machín Volcano (CMV) in the Central Cordillera of Colombia occurred ∼900 years BP and ended with the formation of a dacitic lava dome. The dome rocks contain both normally and reversely zoned plagioclase (An24–54), un... Read More about Crystallization conditions and petrogenesis of the lava dome from the ∼900 years BP eruption of Cerro Machín Volcano, Colombia.

Vesuvianite in high-pressure-metamorphosed oceanic lithosphere (Raspas Complex, Ecuador) and its role for transport of water and trace elements in subduction zones (2013)
Journal Article
Halama, R., Savov, I. P., Garbe-Schönberg, D., Schenk, V., & Toulkeridis, T. (2013). Vesuvianite in high-pressure-metamorphosed oceanic lithosphere (Raspas Complex, Ecuador) and its role for transport of water and trace elements in subduction zones. European Journal of Mineralogy, 25(2), 193-219. https://doi.org/10.1127/0935-1221/2013/0025-2281

Metamorphosed, vesuvianite-bearing dykes occur in serpentinised peridotites of the Raspas Complex (Ecuador), which represents a piece of oceanic lithosphere that has experienced high-pressure, subduction-related metamorphism. The serpentinite mantle... Read More about Vesuvianite in high-pressure-metamorphosed oceanic lithosphere (Raspas Complex, Ecuador) and its role for transport of water and trace elements in subduction zones.