...Figure 3. The two Huangshan granite facies: ( a – b ) Medium-grained “protolithionite” granite (MP granite); note the cuspate mica shape in relation with the reorganization of the perthite lamellae. ( c – d ) Medium-grained annite granite (MA granite). Qz = quartz; Kfs = K-feldspar; Ab = albite...

..., protolithionite-muscovite granite which has a finer grained, muscovite granite margin. The protolithionite-muscovite granite is intruded by small bodies of muscovite granite which form the locus of a tungsten vein system at the Xin Fang tungsten mine. Two sheetlike bodies, a lower Li mica granite and an upper...

... with tartan twinning, subhedral to anhedral quartz and protolithionite, and lath-shaped columbite-(Fe) enclosed in quartz. (C) AG-1: abundant tabular albite with some albite enclosed in anhedral muscovite. (D) AG-1: mineral assemblage of subhedral to anhedral quartz, albite, and zinnwaldite. Zinnwaldite...

...Zdenek Johan; Ladislav Strnad; Vera Johan Abstract A 1596-m-deep borehole (CS–1) located in the central part of the Cínovec (Zinnwald) granite cupola mineralized in Sn and W intersected zinnwaldite granite (ZG) followed by lithian annite (“protolithionite”) granite (PG). These two types of granite...

...F ig . 1. Plot of TiO 2 vs. mgli (= octahedral Mg minus Li) in trioctahedral micas. Solid line represents median or 50 th percentile. Dotted area reflects 15 th –85 th interquantile range. See text for more detailed explanation. lepl = lepidolite, zinw = zinnwaldite, prot = protolithionite...

... (“protolithionite-3 T ”; Pavlishin et al. , 1981 ; Weiss et al. , 1993 ). Ordering of tetrahedral cations is unusual in the muscovite-polylithionite-annite system ( Guggenheim & Bailey, 1977 ; Weiss et al. , 1993 ; Rieder et al. , 1996 ; Brigatti et al. , 2000 ). Consistent differences between...

...F ig . 1. Frequency distribution of mica varieties for actual Fe-Li micas. Natural mica varieties are shown as five columns: Sid = Fe 2+ -rich Mg-Fe micas including siderophyllite and ferrobiotite; Pro = protolithionite; Zin = zinnwaldite; Cry = Cryophyllite; and Lep = lepidolite. Groups 1–6...

... with a complete succession from proto-lithionite granite to muscovite-zinnwaldite granite and albite-lepidolite granite. The Nb, Ta, Sn-mineralization is disseminated throughout all the granites (except the protolithionite granite). The following paragenetic succession of Nb, Ta, Sn-minerals has been established...

..., ilmenite, and fluorite. The protolithionite-muscovite granite is medium- to coarse-grained ( Figs. 2A , 3A ) and is generally white or pale gray with a seriate texture and a grain size ranging from <1 to 20 mm. Phenocrysts of plagioclase and K-feldspar may be present. Biotite occurs as crystals...

..., and limestone and dolomitic limestone of Qiziqiao Formation. A vertical zonation is well developed from the deeper level upward to the top of the Laiziling mountain peak: protolithionite granite zone, leucogranite zone, albite granite zone, greisen zone, massive quartz zone, and pegmatoid stockscheider zone...