. Transactions. The Great Western I>iki . Side View Fig. The Great Western Dike, End View 840 MAGNETIC [RON-ORBS OF [RON COUNTY, UTAH. Both the magnetite and the hematite vary in quality fromvery pure ores high in iron and low in phosphorus and sulphur, to siliceous ores f no commercial value. The ores containtraces of copper, but no titanium. The composition of thebetter grades of magnetite is as follows: Fe, (52 to 68; P, ; 8, to ; and Cu, to per hematites yield on analyses: Fe, 40 to 61 ; P, to ;S, to ; and Cu, to pe
. Transactions. The Great Western I>iki . Side View Fig. The Great Western Dike, End View 840 MAGNETIC [RON-ORBS OF [RON COUNTY, UTAH. Both the magnetite and the hematite vary in quality fromvery pure ores high in iron and low in phosphorus and sulphur, to siliceous ores f no commercial value. The ores containtraces of copper, but no titanium. The composition of thebetter grades of magnetite is as follows: Fe, (52 to 68; P, ; 8, to ; and Cu, to per hematites yield on analyses: Fe, 40 to 61 ; P, to ;S, to ; and Cu, to per cent. The aboveanalyses are from a large number made recently, and representthe variations in the merchantable ore. The magnetite occurs in nearlv vertical dikes in diorite-porphyry; and also as sheets in overflows from these dikes,very similar to the overflows of lava so common in SouthernUtah. In some instances the remnants of the sedimentary beds re-maining in contact with the ore form one of the walls. Thepresence of these thin beds of limestone
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
