...C. E. Tilley Abstract The anorthic iron-manganese silicate, pyroxmangite has now been recognised from four localities: Iva (South Carolina); Tunaberg and Vester Silvberg, Sweden; Idaho. Copyright © 1937 by the Mineralogical Society of America 1937 Mineralogical Society of America ...

...F ig . 1. ( a ) Plane-polarized optical microscope image of radiohalos in grunerite (Amp) surrounding monazite inclusions (Mon) within an almandine-grunerite-biotite (Bi) meta-ironstone from Tunaberg, Sweden. Note the dark brown, smeared discolouration surrounding the inclusion resulting from...

... schists or gneisses may have melted. Minor phases include galena and many LMCE-bearing sulfosalts [Pyhäsalmi: Helovuori (1979) ; Sulitjelma: Cook (1996) ]. The strongest candidate for melting is the Cu–Co deposit at Tunaberg in the Bergslagen district of Sweden. This deposit was metamorphosed at 3...

...F ig . 1. Radiation damage haloes showing as dark circles surrounding monazite inclusions (lighter centres) in biotite (darker, cleaved phase) in a 1.8 Ga meta-ironstone from Tunaberg, Sweden (optical image in plane polarized light). ...

... Bi 2 Te 2 Se. Filled triangles – skippenite ( Johan et al. , 1987 ). Filled square – tetradymite (this study). Open squares – tetradymite from Fe-zone, Ocna de Fier ( Ciobanu and Cook, 2000 ). For comparison: open stars and crosses: kawazulite and tetradymite from Tunaberg, Sweden ( Dobbe, 1991...

...-Cu-Platinum-Group Element Sulfide Deposit, Sudbury, Canada: Early Crystallization of PGE-Rich Sulfarsenides . Economic Geology 105 ( 6 ), 1071 – 1096 . Dobbe R. ( 1993 ) Bismuth tellurides (joseite-B, bismuthian tsumoite) in a Pb-Zn deposit from Tunaberg, Sweden . European Journal...

... temperature decreases with increasing P ( Liu and Bassett, 1986 ); at 5 kbars, it would melt at about 250°C. The native Bi at Broken Hill would have been molten for millions of years after the peak of metamorphism. Kieftite was first recognized from the Tunaberg deposit in Sweden ( Dobbe et al., 1994 ), where...

... museum collections for analysis. In particular, geological provinces where medieval mines were located were chosen for sampling: Erzgebirge, Rammelsberg, Schneeberg, Saxony, St. Andreasberg, and Harz (Germany); Zinkenwand (Austria); Bohemia (Czech Republic); and Tunaberg (Sweden). Rocks from...

...} and {020} reflections having considerably weaker intensity than {200} (consistent with dynamical diffraction effects for sample thicknesses of <20 nm). The mineral we have used to demonstrate this technique is biotite, taken from a 2 Ba almandine-grunerite-biotite sample from near Tunaberg, Sweden...

... variety of values of the Bi:Te ratio observed in natural tellurides of Bi. Dobbe (1993) considered that his suite of compositional data from Tunaberg, Sweden, supported the idea of a single solid-solution, a tsumoite-type phase (bismuthian tsumoite) extending between values of the Bi:Te ratio of 1.35...

...-Ni sulfide deposit (Western Australia) which is hosted by a metamorphosed ultramafic sequence ( Groves & Hall, 1978 ), at the Hultebo Pb-Zn-Ag deposit (Tunaberg, Bergslagen, central Sweden) which is hosted by sediments ( Dobbe, 1991 ), and at the Agassiz stratabound Pb-Zn-rich gold deposit (Lynn...

... de Geociências (UFRJ) 35 , 55 – 64 . Dobbe, R. ( 1993 ) Bismuth tellurides (joseite-B, bismuthian tsumoite) in a Pb–Zn deposit from Tunaberg, Sweden . European Journal of Mineralogy 5 , 165 – 170...