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7. Towards defining reasonable minimum composition thresholds – Impacts of variable CO2 stream compositions on transport, injection and storage

Author

Rütters, Heike, Fischer, Sebastian, Hoa, Le Quynh, Bettge, Dirk, Bäßler, Ralph, Maßmann, Jobst, Ostertag-Henning, Christian, Wolf, J. Lennard, Pumpa, Martin, Lubenau, Udo, Knauer, Sandra, Jaeger, Philip, Neumann, Andreas, Svensson, Kristoff, Pöllmann, Herbert, Lempp, Christof, Menezes, Flora F., and Hagemann, Birger

Published
2022
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43. Freitalite, C14H10, a new aromatic hydrocarbon mineral from Freital, Saxony, Germany

Author

Witzke, Thomas, Schreyer, Martin, Brandes, Benjamin, Csuk, René, and Pöllmann, Herbert

Subjects
Mineralogy, QE351-399.2
Abstract

The new mineral species freitalite, C14H10, corresponding to the aromatic hydrocarbon anthracene, has been discovered on the mine dump of the Königin Carola shaft (also named Paul Berndt Mine), Freital, near Dresden, Saxony, Germany. The mineral forms thin blades or flakes of irregular shape up to a few millimetres in size and shows an intense violet or whitish-violet to white colour. Freitalite is a product of pyrolysis of coal at low oxygen fugacity and was formed by sublimation from a gas phase. The mineral is associated with sulfur and hoelite. Elemental analysis gave (in wt. %, average of three analyses) C 94.07, H 5.571 and total 99.641. The empirical formula is C14.00H9.88 (calculated for C = 14). The identity with anthracene was confirmed by infrared and Raman spectroscopy, high-performance liquid chromatography, gas chromatography with mass spectrometry, 1H and 13C NMR spectrometry, and X-ray powder diffraction. Freitalite is monoclinic, P21∕a, with lattice parameters a=8.5572(9), b=6.0220(5), c=11.173(1) Å, β=124.174(1)∘ and V=476.34(3) Å3 refined from powder data. The calculated density of 1.242 g cm−3 (for Z=2) is very close to the measured density of 1.240 g cm−3. Freitalite was accepted as a new mineral by the Commission on New Minerals, Nomenclature and Classification of the International Mineralogical Association (IMA 2019-116).

Published
2021

47. A Natural GMS Laboratory (Granulometry-Morphometry-Situmetry): Geomorphological-Sedimentological-Mineralogical Terrain Analysis Linked to Coarse-Grained Siliciclastic Sediments at the Basement-Foreland Boundary (SE Germany)

Author

Dill, Harald G., Buzatu, Andrei, Kleyer, Christopher, Balaban, Sorin-Ionut, Pöllmann, Herbert, Füssel, Martin, Dill, Harald G., Buzatu, Andrei, Kleyer, Christopher, Balaban, Sorin-Ionut, Pöllmann, Herbert, and Füssel, Martin

Abstract

The “natural GMS laboratory” (granulometry-morphometry-situmetry) is located within the Variscan Basement in SE Germany (Fichtelgebirge Mts.), which is uplifted relative to its Permo-Mesozoic foreland along a deep-seated lineamentary fault zone. This transitional study area is crossed by straight to low drainage systems in the basement, turning meandering channel systems into high sinuosity when entering the foreland. Due to its good geological coverage, the entire region is subjected to an advanced-level terrain analysis and completed with a sedimentological study focusing on the GMS tool. Unlike many applications in the past, the three components of the GMS tool that are of almost equal value ought to be used in combination and not as stand-alone procedures so as to be integrated into other near-surface geoscientific methods, e.g., sediment petrography. The strong points of granulometry of coarse-grained/gravel-sized sediments are its extension into the smaller sand and clay grain size intervals using the sorting, mean and/or median values for an environmental analysis. Morphometry can be linked to the compositional geosciences, e.g., mineralogy and geochemistry. The grain shape is intimately connected with the lithology, providing options from triaxial measuring of the lithoclast to the digital image analysis. It is a favorable tool to supplement the provenance of lithoclasts. Situmetry is the key element of hydrodynamic research and directly builds upon its sister methods. Its applications and numerical approaches are useful for the identification and quantification of physical land-forming processes. It is the fan sharpness and the orientation of lithoclasts relative to the direction of the talweg and in relation cross-sectional valley features that integrate the GMS tool into geological and geomorphological mapping, both of which result in a digital terrain model. Horizontal rose diagrams are useful for the upper reaches of drainage systems, be they of alluvia

Published
2022

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