DAY 3

Question 1

What can be measured if there are two individuals located in different areas belonging to the same latitude of the Earth?

A. Circumference of the Earth
B. Diameter of the Sun
C. Radius of the Earth
D. None

Answer 1

A or C

Question 2

Assuming that all dip values are taken correctly from a tilted sandstone bed, which among the following is the true dip?

a. 45 degrees
b. 42 degrees
c. 43.5 degrees
d. 44.5 degrees
e. cannot be determined

Answer 2

A

Question 3

Calculate the thickness of a tilted bed having a due east strike and 45 degrees due south true dip and an exposed horizontal thickness of 10 meters.

Answer 3

10

Question 4

Given strike and true dip of N50E, 40SE, find the apparent dip in vertical section trending S70E.

Question 5

Given two apparent dips (i.e., (1) 55, N60E; (2) 65, N45E), calculate the true dip of the bed.

Question 6

Calculate the thickness of a tilted bed having a due east strike and 45 due south true dip and an exposed horizontal thickness of 10 meters.

Question 7

T or F. Pyrite transforms into marcasite at high temperature conditions (i.e., >400 degrees Celsius).

Answer 7

F. Marcasite is a polymorph of pyrite also known as white pyrite forms at near surface conditions.

Question 8

T or F. Enargite and Luzonite are pseudomorphs.

Answer 8

F. Dimorph or polymorph

Question 9

T or F. An ounce of lead is heavier than an ounce of gold.

Answer 9

F

Question 10

T or F. The Clarke concentration of an element is equal to the cutoff grade of the element divided by its crustal abundance.

Answer 10

T

Question 11

T or F. Nicolas Steno described mining techniques and used morphological classification of ore deposits in De Re Metallica

Answer 11

F. Georges Bauer (Father of Mineralogy)

Question 12

T or F. Epithermal veins are formed at higher temperatures than hypothermal deposits.

Answer 12

F. Epithermal shows at shallow surfaces

Question 13

T or F. A gas phase is present during formation of pneumatolytic
deposits

Answer 13

T

Question 14

T or F. The melting point of ice in fluid inclusions increases as the salt content of the fluid increases.

Answer 14

F. More salts means ice melts faster

Question 15

T or F. Silicification and silication are synonymous terms referring to the introduction of or replacement by silica.

Answer 15

F. Silicification - replacing silica
Silication - converting to silica

Question 16

T or F. Drag ore is an indication of pre-ore faulting

Answer 16

F. Pre-ore means wala pang ore
Drag ore - crushed or broken part of the ore body in the fault zone

Question 17

T or F. Ore reserves consist of measured and indicated reserves.

Answer 17

F. Indicate and measure are mineral resources

Question 18

T or F. The average width of the veins is greater or equal the average width of the stope.

Answer 18

F. Only greater not equal

Question 19

T or F. The sodium ion is usually the most abundant constituent of fluids in fluid inclusions

Answer 19

T.

Question 20

A gold quartz vein has a strike length of 300 m and an average thickness of 1.5 m. What is the production rate from this vein?

– Assume density of quartz vein 2.6 g/cm3
– Assume production rate 50 vertical m/a

Question 21

What is the optimal mine capacity for a reserve of 8 million t of
ore?

Question 22

An iron ore mine produces crude ore with 55% Fe and a concentrate with 66% Fe at a 90% metal recovery. Calculate mass recovery factor.

Question 23

A mine contains in situ ore grading 8% Pb. It produces a 65% Pb concentrate, with a recovery rate of 95%. Calculate the concentration factor.

Question 24

Determine the recovery for the following data:
* Feed grade = 10 % Zn
* Concentrate grade = 54 % Zn
* Tailings grade = 0.5 % Zn

Question 25

The following are the methods/principles to determine the volume or density of a rock sample, except:

a. Archimede’s Principle
b. Water Displacement Method
c. Measuring the Dimensions of the Rock Sample
d. Pyncnometry
e. Boyle’s Law of Volume-pressure relationships (Mariotte’s Law)
f. Charle’s Law
g. All of the above

Answer 25

E or F

Question 26

Derive the factor needed to convert a percentage value of MoS2 in a percentage value of Mo.

Question 27

What is the copper concentration in Cuprite?