268
MINERALS YEARBOOK


WORLD PRODUCTION
 The world production of molybdenum during l930—~2 is shown in the
following table.

World production of molybdenum ores and concentrates, 1930—314
Country
Mineral

PerCeflt
Con.

tanied

denum
Value
1930
Australia:
.
Metric tons
3
2
(1)
5
26
.8
284
3,282
(1)
(1)
(1)
(1)
(1)
(1)
75
85.75
Metric
tons
(1)
(1)
0.2
(1)
(1)
(1)
128
1,688
$2, 115
1,935
(1)
(1)
14,313
785
227,993
2,048,000
New South Wales           Queensland               
Austria                     
China                      
Chosen                    
Morocco, Frepch 2                 
Norway                         
United States                    

1931
Australia:
New South Wales          
Molybdenite      .do... --        
Wulfenite         
Molybdenite      
......do          do           
do           do           



....do          






.3



.3



(1)



(1)



(1)



(1)



5



223



(1)



2,756
(1)



(1)



(1)



(1)



(1)



(1)



(1)



77



(1)



85.93
(1)



(1)



.6



(1)



(1)



3.4



(1)



108



4.6



1,421
245
218
270
(1)
(1)
6,789
3,136
134,000
4,550
1,566,000
Queensland              
Canada                    
China                     
Chosen                     
Mexico                         
Morocco, French 2                 
Norway                     
Peru..                           
......do          
.......do          
 
.~..do          do           do           
...~do          do           




United States                    

1932
Australia:
New South Wales               Queensland                   
China                         
Chosen                          
Mexico                    
Morocco, French 2                 
Norway                        
Peru                      
do           



do           do           do           
 do           .......do          
 do           
 do           ..~....do          






(1)
(1)
(1)
(1)
(1)
.1
2369
(1)
2,165
(1)
(1)
(1)
(1)
(1)
(1)
2 80
(1)
84.89
(1)
(1)
(1)
(1)
3.1
(1)
222L 4
(1)
1, 103
(1)
(1)
(1)
(1)
4,342
4
(1)
(1)
1,216,000
United States                
......do          




I Data not available.
2Exports.


 Norway.—The largest foreign molybdenum deposit now in opera-. tion
is the Knaben mine in Norway. The Knaben mine, in southern Norway about 25
miles a little east of north from Flekkefjord and 38 miles N. 600 E. from
Ekersund, has been producing molybdenite since 1901, except in 1910, 1920,
1921, and 1922. The total quantity produced to the close of 1932 was 3,012
metric tons 22 of molybdenite concentrates averaging 80 percent MoS2, of
which 369 metric tons were produced in 1932, as shown by exports.23
 Woakes24 divides the deposits into (1) quartz lodes; (2) fissured granite,
more or less decomposed, carrying molybdenite with a small quantity of quartz,
having a flat dip and little depth; (3) impregnated granite or norite. Some
pyrite, chalcopyrite, a little pyrrhotite, feldspar, mica, and hornblende
are found with the deposits.
 In the Knaben mine some of the stopes are 10 meters wide, and although in
general the molybdenite is finely disseminated some large rich masses have
been mined. In many places the ore disappears at

" A metric ton equals 2,204.6 pounds or 1.1023 short tons.
23From figures compiled by H. H. Smith, Oslo, Norway.
2'Woakes, E. H., Molybdenum in Norway: Inst. Mm. and Met. (London), Bull.
160, 1918, p.5.