1. Complements to the volcanic history of Luž/Lausche Volcano.
- Author
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Rapprich, Vladislav, Büchner, Jörg, Skácelová, Zuzana, Tietz, Olaf, and Pour, Ondrej
- Subjects
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LAVA domes , *VOLCANOES , *VOLCANIC fields , *ELECTRICAL resistivity , *PHONOLITE , *VOLCANISM , *VOLCANIC soils - Abstract
Luž/Lausche is a prominent volcanic feature of the Lusatian Volcanic Field in the Czech/German border region. Ongoing research has brought additional data and interpretations complementary to the eruptive history presented by Wenger et al. (2017). Electric resistivity tomography has revealed the northern limit of the diatreme, which is obscured by anthropogenic influence on landscape. Compared to the expected extent, the diatreme seems to be of slightly smaller diameter. Various techniques were applied to test, whether Hickelstein and proper Luž/Lausche represent two stages of lava dome growth. Whereas gamma-ray spectrometry shows a systematic difference between Hickelstein and Luž/Lausche, negligible variations were observed in bulk-rock chemistry. Both phonolite samples are characterised by negative Ba and Sr-P anomalies in chondrite-normalised spidergram. On the other hand, a significant Zr-Hf anomaly seems to be associated with abundant presence of hiortdahlite in both rocks: This rather exotic mineral known from alkaline complexes worldwide, was for the first time described in rock-forming amounts from Cenozoic alkaline rocks of the Central Europe. The complemented eruptive history was transformed into a popularising animation available on https://www.youtube.com/watch?v=fIrU2_mxgDI. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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