Journal - South African Institute of Mining and Metallurgy . ern boundary of theLangverwacht. Lodes.—Near the top of the hill there areseveral strong outcrops of quartz, following anorth-south direction, and occurring on five fairlydistinct lines, with a width between extremes ofsome 1,500 ft. Some of the outcrops have been,opened out by means of trenches and shallowshafts, and show the characteristics of true dip is to the east, and flat, seldom exceeding35°, and each quartz occurrence appears to beaccompanied by well defined bands of highlymicaceous greisen, mostly in the hanging w
Journal - South African Institute of Mining and Metallurgy . ern boundary of theLangverwacht. Lodes.—Near the top of the hill there areseveral strong outcrops of quartz, following anorth-south direction, and occurring on five fairlydistinct lines, with a width between extremes ofsome 1,500 ft. Some of the outcrops have been,opened out by means of trenches and shallowshafts, and show the characteristics of true dip is to the east, and flat, seldom exceeding35°, and each quartz occurrence appears to beaccompanied by well defined bands of highlymicaceous greisen, mostly in the hanging walls are of decomposed granite, occasionallyshowing tourmaline, and display a tendencytowards a gneissic structure. The thickness ofthe quartz is variable, in places pinching to amere stringer to open out again within a shortdistance to a width of 3 or 4 ft. The bands ofgreisen appear more regular and constant, becom-ing thickest where the quartz is thinnest(Figs. I. and II.). The width between the footwalL FICI SECTION OF N° 4 LODE AT OUTCROP.
Size: 2249px × 1112px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectmetall, booksubjectmineralindustries
