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Data Publication
Accessory Minerals in Felsic Igneous Rocks - Part 6: Composition of monazite-(Ce), xenotime-(Y) and zircon from the late-Variscan Fichtelgebirge/Smrčiny granites (Germany, Czech Republic)
Förster, Hans-Jürgen
GFZ Data Services
(2020)
This data set is the sixth part of a series reporting chemical data for accessory minerals from felsic igneous rocks. It assembles the results of electron-microprobe spot analyses of monazite-(Ce), xenotime-(Y) and zircon from the late-Variscan granites of the Fichtelgebirge/Smrčiny in the Saxothuringian Zone of the Variscan Orogen in Germany/ Czech Republic. The granites form an older, Namurian intrusive complex (OIC-p and OIC-e) and a younger, post-Westphalian intrusive complex (YIC-1 and YIC-2). Both complexes have distinct radioactive accessory-mineral assemblages and compositions. The OIC-p biotite monzogranites contain monazite-(Ce) and minor thorite, but apparently lack magmatic xenotime-(Y) and uraninite. The more evolved OIC-e two-mica granites bear monazite-(Ce) occasionally rich in Th (up to 21 wt% ThO2) and U (8 wt% UO2), xenotime-(Y) of moderate U content (< 3.3 wt% UO2), and uraninite poor in Th and the REE. The most fractionated YIC Li-mica granites (YIC-2) may contain monazite extremely high in Th (40.5 wt% ThO2) and U (8.6 wt% UO2), which classify as cheralite-(Ce), xenotime-(Y) rich in U (6.3 wt% UO2) and such with elevated Y/Ho ratios (up to 48), and also a Th–REE-poor uraninite. In these granites, zircon may contain up to 5 wt% HfO2 and display low, fractionated Zr/Hf ratios (down to 10). The data set contains the complete pile of electron-microprobe analyses for monazite-(Ce) (MONA-FICH-2020), xenotime-(Y) (XENO-FICH-2020), and zircon (ZIRC-FICH-2020). All tables are presented as Excel (xlsx) and machine-readable txt formats. The content of the tables and further information on the granites and regional geology are provided in the data description file.
Keywords
Originally assigned keywords
Corresponding MSL vocabulary keywords
MSL enriched keywords
MSL enriched sub domains i
Source publisher
GFZ Data Services
DOI
10.5880/gfz.4.8.2020.002
Authors
Förster, Hans-Jürgen
GFZ German Research Centre for Geosciecnces, Potsdam, Germany;
References
References
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10.1016/0016-7037(89)90286-X
References
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10.1016/0009-2541(72)90016-2
References
IsDocumentedBy
Förster, H. J., Rhede, D., & Hecht, L. (2008). Chemical composition of radioactive accessory minerals: implications for the evolution, alteration, age, and uranium fertility of the Fichtelgebirge granites (NE Bavaria, Germany). Neues Jahrbuch Für Mineralogie - Abhandlungen, 185(2), 161–182. https://doi.org/10.1127/0077-7757/2008/0117
10.1127/0077-7757/2008/0117
IsDocumentedBy
Hecht, L., & Vigneresse, J. L. (1999). A multidisciplinary approach combining geochemical, gravity and structural data: implications for pluton emplacement and zonation. Geological Society, London, Special Publications, 168(1), 95–110. https://doi.org/10.1144/gsl.sp.1999.168.01.07
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References
Irber, W., Förster, H.-J., Hecht, L., Möller, P., & Morteani, G. (1997). Experimental, geochemical, mineralogical and O-isotope constraints on the late-magmatic history of the Fichtelgebirge granites (Germany). Geologische Rundschau, 86(S1), S110–S124. https://doi.org/10.1007/pl00014647
10.1007/PL00014647
IsDocumentedBy
Jarosewich, E., & Boatner, L. A. (1991). Rare‐Earth Element Reference Samples for Electron Microprobe Analysis. Geostandards Newsletter, 15(2), 397–399. Portico. https://doi.org/10.1111/j.1751-908x.1991.tb00115.x
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References
Schödlbauer, S., Hecht, L., Höhndorf, A., & Morteani, G. (1997). Enclaves in the S-type granites of the Kösseine massif (Fichtelgebirge, Germany): implications for the origin of granites. Geologische Rundschau, 86(S1), S125–S140. https://doi.org/10.1007/pl00014648
10.1007/PL00014648
References
References
Citiation
Förster, H.-J. (2020). Accessory Minerals in Felsic Igneous Rocks - Part 6: Composition of monazite-(Ce), xenotime-(Y) and zircon from the late-Variscan Fichtelgebirge/Smrčiny granites (Germany, Czech Republic) [Data set]. GFZ Data Services. https://doi.org/10.5880/GFZ.4.8.2020.002
Geo location(s)
Fichtelgebirge