2026-07-21T05:58:48Zhttp://doidb.wdc-terra.org/oaip/oaioai:doidb.wdc-terra.org:68202026-06-10T10:03:19ZDOIDBDOIDB.GFZfalse4DOIDB.GFZ
10.5880/GFZ.4.8.2020.002
Förster, Hans-Jürgen
Hans-Jürgen
Förster
0000-0002-4654-0382
GFZ German Research Centre for Geosciences, Potsdam, Germany
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)
GFZ Data Services
2020
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 > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > ELEMENTS
EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > IGNEOUS ROCKS
EARTH SCIENCE > SOLID EARTH > ROCKS/MINERALS/CRYSTALS > MINERALS
Förster, Hans-Jürgen
GFZ German Research Centre for Geosciences, Potsdam, Germany
Dataset
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
CC BY 4.0
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.
Fichtelgebirge
11.6623
12.4011
49.9678
50.2338