The deposits of the useful minerals & rocks; their origin, form, and content . 1042 OEE-DEPOSITS is known to the north-east as far as Jinonic near Prague, and to the south-east through Lodenitz, Vra^, Beraun, to Knizkowic. Here at Zditz itoccurs at the surface with a \\adth of 11 m., so that it can again bemined by opencut. Altogether this ore-bed is known for a length of 40kilometres. The dark greenish-grey, more seldom bluish-grey ore is principallya ferrous silicate of oolitic structure with a more or less sideritic or schistosematrix. It is generally described as chamosite, though mineralo
The deposits of the useful minerals & rocks; their origin, form, and content . 1042 OEE-DEPOSITS is known to the north-east as far as Jinonic near Prague, and to the south-east through Lodenitz, Vra^, Beraun, to Knizkowic. Here at Zditz itoccurs at the surface with a \\adth of 11 m., so that it can again bemined by opencut. Altogether this ore-bed is known for a length of 40kilometres. The dark greenish-grey, more seldom bluish-grey ore is principallya ferrous silicate of oolitic structure with a more or less sideritic or schistosematrix. It is generally described as chamosite, though mineralogically. Fig. 423.—The chamosite <leposit at Schmiedefeld in 1 : 100,000. Eiuecke and Kuhler. f!) = Cambrian ; .Sl7r = Lo\ver Silurian quartz-schists ; .Sla = Lower Silurian Griffelschiefer ; *l/3 = overlyingSilurian dark slate. Tlie Lower Silurian, together with the deposit, is by the Lichtentaun Main Faultthrown against tlic Cambrian. it differs from this mineral in its high siderite content. In the neighbour-hood of the outcrop it is altered to hmonite. On the southern flank of the Silmian basin this deposit is not known,thouo-h an oolitic ore-bed O-75-ll m. thick and having the same character-istics as that at Nucitz is found in the horizon dg between Vraz and Revnitz. The average iron content of the Nu6itz raw ore is 35-5 per cent withabout 20 per cent insoluble residue and 20 per cent loss on ignition. Theroasted ore contains 44-3 per cent of iron. The Bohemian iron production amounts to about 700,000 toiis, ofwhich 650,000 tons are contributed by the Prague Ei
Size: 1938px × 1289px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectminesandmineralresou
