 | Förster, H.-J., Gottesmann, B., Tischendorf, G., Siebel, W., Rhede, D., Seltmann, R., Wasternack, J. (2007) Permo-Carboniferous subvolcanic rhyolitic dikes in the western Erzgebirge/Vogtland, Germany: a record of source heterogeneity of post-collisional felsic magmatism. Neues Jahrbuch für Mineralogie - Abhandlungen, 183 (2) 123-147 doi:10.1127/0077-7757/2007/0064 | Journal (article/letter/editorial) | | 295 Ma, from occurrences at Gottesberg and Jungfernsprung) suggest a middle/late Carboniferous (Stefanian)...Rautenkranz, forest district 76, at cliff ”Jungfernsprung”; 2 – 800 m N Rautenkranz, forest district...of Kirchberg (Saupersdorf) and Eibenstock (Jungfernsprung, Morgenröthe, Hahnewald, Gottesberg), i. e...of 40Ar (154 ± 3 nl/g) in a weakly chloritized biotite fraction 0.2 – 0.4 mm of sample Gb-71 from Gottesberg...the principal compositional features of low-F biotite granites and two-mica granites of transitional |  | | Journal (article/letter/editorial) | | pluton's area on the present erosion surface (biotite diorites to quartz monzonites, “redwizites” according...earlier called “Gebirgsgranit”) consists mainly of biotite monzogranites (Loket, Nejdek, Fláje), whereas the...(YIC, formerly “Erzgebirgsgranit”) ranges from Li-biotite syenogranites with topaz to Fig. 1. Sketch of...are mostly medium- to coarse-grained biotite granodiorites to biotite monzogranites or sporadically two-mica...sericitized plagioclase An15–35, poikilitic K-feldspar, biotite, some muscovite and accessory zircon and apatite |  | Kempe, Ulf, Bombach, Klaus, Matukov, Dmitrij, Schlothauer, Thomas, Hutschenreuter, Jan, Wolf, Dieter, Sergeev, Sergej (2004) Pb/Pb and U/Pb zircon dating of subvolcanic rhyolite as a time marker for Hercynian granite magmatism and Sn mineralisation in the Eibenstock granite, Erzgebirge, Germany: Considering effects of zircon alteration. Mineralium Deposita, 39 (5) 646-669 doi:10.1007/s00126-004-0435-y | Journal (article/letter/editorial) | | 330–340 Ma by Ar/Ar and Rb-Sr dating of muscovite, biotite, and amphibole (Tikhomirowa et al. 1995, 1996;...(Fig. 1; two samples ES 33 and 35; locations Jungfernsprung and near Katzenstein; these samples show, however...plagioclase (?), and (very rarely) muscovite (former biotite?) phenocrysts were observed. In several cases,...muscovite (partly replaced by chlorite), albite, and biotite were found. In CL images, some weak recrystallisation...zircon grains were mostly found to be enclosed in biotite. In contrast, the CL intensity in zircon from sample |  | | Book | | gabbro to biotite-hornblende granodiorite CaG group – Ca-rich and K-poor acid granitoids (biotite granodiorite...(scarce monzonitic rocks and voluminous amphibole-biotite granodiorite to monzogranite UK group – the ultrapotassic...ultrapotassic group comprising amphibole-biotite to pyroxene-biotite melasyenitic to melagranitic rocks KMgG...granitoids): Zbonín Granite (lateorogenic) porphyritic biotite ± muscovite monzogranite; Kšely Granite (probably...age. Central Bohemian Pluton – K-Ar analyses on biotite and hornblende from a variety of granitoids yielded |  | Amstutz, G. C., Goresy, A. El, Frenzel, G., Kluth, C., Moh, G., Wauschkuhn, A., Zimmermann, R.A. - Eds. (1982) Ore Genesis. Springer Berlin, Heidelberg. doi:10.1007/978-3-642-68344-2 | Book | | Myrthengraben Gypsum Deposit, Semmering, Lower Austria W. Tufar (With 13 Figures) . . . . . . . . . ....but some of the smaller ones are olivine-augite-biotite lamprophyres. The sequence of faulting and dike...and many chloritites contain variable amounts of biotite. Sericitization occurs in a few carbonate-rich...alteration is: 1. Albitization 2. Chloritization (± biotite) 3. Carbonatization (dolomite, calcite or both;...preserved. Biotite occurs in many chloritites, and in a few it exceeds or excludes chlorite. Biotite-chlorite |
|
