efer to the geologic and topographic map at the back of this paper and answ he f

Question

efer to the geologic and topographic map at the back of this paper and answ he following questions: /o onstruct a topographic profile along line A-B. 2. Construct a geologic section along line A-B. 3. The gold qu p a 20 artz vein can be traced 100 meters below the surface. Calculate the ff 1d a) Volume of the vein as shown on the map. b) Tonnage of the yein assuming density of the vein is c) Total gold content in ounces (1 ounce30 grams) assuming average gold gradeis 3 graso d) Total ground value of gold if gold is $ L000-ounce e) Will the mine make a profit if the development and operating cost is 2 billon Calculate the hydraulic gradient between: /o/ a) Wells 1 and 2 b) Wells 2 and 3 c) Wells 1 and 3 Calculate stream discharge at Point D assuming: 0 a) Width of stream is J5 meters and-depth is 10m b) Flotation time between Points Cand D 20 seconds. a50

Explanation / Answer

3) a) Volume of the vein = 9630,000 meter-cube

b) total tonage = 25038000 tons

c) gold rate 0.1 ounce /tons, total gold= 2503800 ounces

d) total cost = 2503800,000 dollars

e) total cost outcome is greater than 2 billion dollar. so the mine will make profit.

4) hydraulic gradient between 1-2 = 40 m/300 m =0.13(a), well 2-3 = 40/200 = 0.2 (b), well 1-3 = 0.16(c)

5) flotation is 500 meter per 20seconds = 25m/sec, At point D, discharge = width x height x velocity = 25 m x 10 m x 25m = 6250 metercube/sec

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