Class Quiz 8

1.  Which of the following lithologies would make a good host rock for a disseminated ore deposit ?

A. silicified quartzite
B. silicified granite
C. calcareous sandstone
D. calcareous shale

2. Galena-sphalerite mineralization in a porphyry copper deposit setting is most likely to be associated with which type of alteration?

A.  Propylitic
B.  Phyllic
C.  Potassic
D.  All of the above

3.  Which rock type is most commonly associated with epithermal mineralization ?

A.  plutonic
B.  volcanic
C.  sedimentary
D.  metamorphic

4.   Which alteration type is most often associated with low pH (acidic) conditions ?

A.  Silicification
B.  Propylitic
C.  Potassic
D.  Phyllic

5.  Which carbonate mineral is most likely to be associated with talc alteration ?

A. dolomite
B. strontianite
C. ankerite
D. witherite

6.  If my claim was on the central portion of a zoned vein system, the alteration types are likely to be ___________.

A.  adjacent to vein:   propylitic           away from vein:  unaltered wallrock
B.  adjacent to vein:  advanced argillic        away from vein:   sericitic
C.  adjacent to vein:  sericitic or argillic        away from vein:   argillic or propylitic
D.  adjacent to vein:  pyrite               away from vein:  magnetite

7.  How many plutons are indicated by the data in the alteration mapping exercise ?

A. 1
B. 2
C. 3
D. 4

8.  Study your alteration map.  Which pluton has the deepest exposure level ?

A. pluton A
B. pluton B
C. pluton C
D. pluton D

9.   Study your alteration map.  Show the trend of the fault along samples 106, 111, 115, and 119.  Based on the exposure level of pluton C, which side of the fault is up ?

A. south side
B. north side
C. neither side, it is strike slip
D. none of the above

10.  Which pluton appears to have the shallowest exposure level and the most potential for discovery of new copper resources.  ?

A. pluton A
B. pluton B
C. pluton C
D. pluton D