Auflistung Alle Publikationen nach Mitwirkenden "Wörner, Gerhard"
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Constraints on the pre-eruptive magmatic history of the Quaternary Laacher See volcano (Germany)
Ba zonation patterns in sanidine phenocrysts from mafic and intermediate phonolite and crystal-rich cumulates from the Laacher See volcano (12.9 ka) in western Germany document diffusion times suggestive of periodic recharge ... -
Evolution of the West Andean Escarpment at 18°S (N. Chile) during the last 25 Ma: uplift, erosion and collapse through time
The geological record of the Western Andean Escarpment (WARP) reveals episodes of uplift, erosion, volcanism and sedimentation. The lithological sequence at 18°S comprises a thick pile of Azapa Conglomerates (25–19 Ma), ... -
Geochemical, isotopic and single crystal 40Ar/39Ar age constraints on the evolution of the Cerro Galán ignimbrites
Kay, Suzanne; Coira, Beatriz; Wörner, Gerhard; Kay, Robert; Singer, Bradley (Bulletin of Volcanology, 2010)The giant ignimbrites that erupted from the Cerro Galán caldera complex in the southern Puna of the high Andean plateau are considered to be linked to crustal and mantle melting as a consequence of delamination of ... -
Hydrated sub-arc mantle: a source for the Kluchevskoy volcano, Kamchatka/Russia
Oxygen isotope ratios of olivine and clinopyroxene phenocrysts from the Kluchevskoy volcano in Kamchatka have been studied by CO2 and ArF laser techniques. Measured δ18O values of 5.8–7.1‰ for olivine and 6.2–7.5‰ for ... -
Mafic Late Miocene–Quaternary volcanic rocks in the Kamchatka back arc region: implications for subduction geometry and slab history at the Pacific–Aleutian junction
Volynets, Anna; Churikova, Tatiana; Wörner, Gerhard; Gordeychik, Boris; Layer, Paul (Contributions to Mineralogy and PetrologyContributions to Mineralogy and Petrology, 2009)New 40Ar/39Ar and published 14C ages constrain voluminous mafic volcanism of the Kamchatka back-arc to Miocene (3–6 Ma) and Late Pleistocene to Holocene (<1 Ma) times. Trace elements and isotopic compositions show that ... -
Petrology, Geochemistry, and Geodynamic Implications of Basaltic Dyke Swarms from the Southern Continental Part of the Cameroon Volcanic Line, Central Africa
Tchouankoue, Jean Pierre; Wambo, Nicole Armelle Simeni; Dongmo, Armand Kagou; Wörner, Gerhard (The Open Geology Journal, 2012)Basaltic dyke swarms in the southern continental part of the Cameroon Volcanic Line (Bangangte, Dschang, Manjo areas) are tholeiitic in composition with 46 to 50 wt.% SiO 2 and have moderate Mg-numbers (53–59), ... -
The Preparation and Preliminary Characterisation of Three Synthetic Andesite Reference Glass Materials (ARM-1, ARM-2, ARM-3) for In Situ Microanalysis
Wu, Shitou; Wörner, Gerhard; Jochum, Klaus Peter; Stoll, Brigitte; Simon, Klaus; Kronz, Andreas (Geostandards and Geoanalytical Research, 2019)Three synthetic reference glasses were prepared by directly fusing and stirring 3.8 kg of high-purity oxide powders to provide reference materials for microanalytical work. These glasses have andesitic major compositions ... -
Timescales from magma mixing to eruption in alkaline volcanism in the Eifel volcanic fields, western Germany
Sundermeyer, Caren; Gätjen, Jochen; Weimann, Lena; Wörner, Gerhard (Contributions to Mineralogy and Petrology, 2020-07-25)Diffusion profiles in olivine crystals from the final mafic eruption products of the compositionally zoned Laacher See tephra deposit were measured to identify recharge and eruption-triggering events prior to the eruption ...