VIII. Gold (Au) and Silver (Ag)

Question 1

It is most malleable of all metals.

Answer 1

Gold

Question 2

Gold’s density

Answer 2

19.3

Question 3

Gold’s hardness

Answer 3

2.5 to 3

Question 4

A primary hydrothermal mineral that is opaque and
bright silvery white with a slightly pink tint, it readily
tarnishes to either gray or black

Answer 4

Silver

Question 5

Silver’s Density

Answer 5

10.1 to 11.1 g/cm3

Question 6

Silver’s Hardness

Answer 6

2.5 to 3

Question 7

These occur primarily related to _____, which characterizes several arc systems that evolved since the Late Cretaceous to the present.

Answer 7

magmatism

Question 8

The gold districts are:

Answer 8

(1) Baguio-Mankayan gold district;
(2) Camarines Norte Gold District; and
(3) Masbate Gold

Question 9

The gold province is the Eastern Mindanao Gold Province consisting of three gold districts, namely:

Answer 9

Surigao Gold District, Central Gold District, and Masara Gold District

Question 10

Philippine gold deposits may be genetically divided into two groups:

Answer 10

(1) Primary-hypogene gold-silver deposits
(2) Secondary-supergene deposits

Question 11

include placer gold and gossanous gold deposits

Answer 11

Secondary-supergene deposits

Question 12

include various genetic subtypes such as epithermal/mesothermal, skarn or contact metasomatic, and copper by products

Answer 12

Primary-hypogene gold-silver deposits,

Question 13

T or F. A second order classification of gold deposits is based on morphology and mineralization style such as veins, breccias, stockworks, disseminations and stratiform
deposits.

Answer 13

True