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Metadata Files

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)

Descriptions

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
monazite
xenotime
zircon
mineral composition
magma differentiation
electron-microprobe analysis
rare earth elements
Variscan orogeny
Fichtelgebirge
Saxothuringian Zone
Namurian intrusive complex
post-Westphalian intrusive complex
EARTH SCIENCE &gt; SOLID EARTH &gt; ROCKS/MINERALS/CRYSTALS &gt; MINERALS
EARTH SCIENCE &gt; SOLID EARTH &gt; ROCKS/MINERALS/CRYSTALS &gt; IGNEOUS ROCKS
EARTH SCIENCE &gt; SOLID EARTH &gt; ROCKS/MINERALS/CRYSTALS &gt; ELEMENTS

Corresponding MSL vocabulary keywords
monazite
zircon

MSL enriched keywords
minerals
phosphate minerals
monazite
silicate minerals
nesosilicates
zircon
igneous rock - intrusive
acidic intrusive
granite
oxide mineral
uraninite
phyllosilicates
mica
biotite
tectonic plate boundary
convergent tectonic plate boundary
continental collision
orogen
equipment
electron probe micro-analyzer
Apparatus
microchemical analysis
electron probe micro analyser

MSL enriched sub domains i

geochemistry
microscopy and tomography

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=escidoc:5064889

Source publisher

GFZ Data Services


DOI

10.5880/gfz.4.8.2020.002


Creators

Förster, Hans-Jürgen

GFZ German Research Centre for Geosciecnces, Potsdam, Germany


References

http://www.minsocam.org/ammin/AM60/AM60_599.pdf

10.1016/0016-7037(89)90286-x

10.1016/0009-2541(72)90016-2

http://www.minsocam.org/msa/AmMin/TOC/Articles_Free/1998/Forster_p259-272_98.pdf

10.1127/0077-7757/2008/0117

10.1144/gsl.sp.1999.168.01.07

10.1007/pl00014647

10.1111/j.1751-908x.1991.tb00115.x

10.1007/pl00014648

http://www.zgw-online.de/en/media/085-102.pdf


Citation

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


Dates

Issued:

2020


Language

en


Rights

CC BY 4.0


Geo location(s)

Fichtelgebirge


Spatial coordinates