VI. Manganese

Question 1

a silver-gray, brittle metallic element used principally in making alloys

Answer 1

Manganese

Question 2

Manganese ranking in abundance among elements in
the earth’s crust

Answer 2

12th

Question 3

Manganese Minerals

Answer 3

1. Pyrolusite
2. Rhodochrosite
3. Franklinite
4. Psilomelane/Romanechite
5. Hausmannite
6. Braunite
7. Rhodonite
8. Alabandite
9. Manganite

Question 4

What is the occurence of Mn?

Answer 4

Iron ores

Question 5

It is the world’s leading producer of high-grade
Mn ore.

Answer 5

Ukraine

Question 6

Ores that contain from 5 -10 % manganese

Answer 6

manganiferous ores

Question 7

Ores that have from 10 – 35% manganese

Answer 7

ferruginous manganese ores

Question 8

Ores that have 35% or more manganese.

Answer 8

manganese ores

Question 9

ferromanganese nodules are abundant at the ______ in areas where oxidized sediments are accumulating at rates of less than 7 meters per million years

Answer 9

ocean floor

Question 10

Most of the manganese deposits of commercial
importance are confined in a belt between _____ north
latitude and ____ south latitude.

Answer 10

45º; 25º

Question 11

Guilbert and Park (1986) stated in their book on the geology of ore deposits that Roy (1976) classified stratiform manganese deposits into two broad
groups, what are those?

Answer 11

(1) volcanogenic; and
(2) nonvolcanogenic, according to the source of their contained manganese

Question 12

Deposits associated with agglomerates, tuffs, and other clastic materials of subaerial submarine hot spring affinity.

Answer 12

Volcanogenic

Question 13

Deposits associated with banded iron formation of distal submarine exhalate origin.

Answer 13

Volcanogenic

Question 14

Bog ore, lacustrine, and fluvial settings. Continental-terrigenous sediments in geosynclinal or shelf settings.

Answer 14

Non-volcanogenic

Question 15

Ferromanganese nodules. Sea floor sediments are more remote from submarine hot springs.

Answer 15

Hybrid