IRON ORE, PIG IRON, FERRO-ALLOYS, AND STEEL 549
Iron ore mined in the United States, by mining districts and varieties, in
1941, in

gross tons

[Exclusive of ore containing 5 percent or more manganese]
District
Hematite

Bi'own ore

Magnetite

Carbonate

Total
Lake Superior'                
Birmingham                  
Chattanooga                  
Adirondack and CornwalL..
Northern New Jersey
Other districts                
78,858,285
6,787,077
25,473
            
            
2 1,054,571

415, 187
421,756


529,906

3,300,451
649,374
2 366,893

606

78,858,285
7,202,264
447,229
3,300,451
649,374
1,951,976

2 86,725,406

1,366,849

2 4,316, 718

606

92,409,579
1 Includes only those mines in Minnesota that are in the true Lake Superior
district. ' Small quantity of magnetite included with hematite.


Iron ore shipped from mines in the United States, 1940—41, by States

[Exclusive of orecontaining 5 percent or more manganese and ore sold for
paint]









State

1940



1941





— Gross tons

Value

—_________

Gross tons

Value

Alabama                            
California                            
Connecticut                                                
Georgia                             
Michigan                            
Minnesota                           
Mississippi                   
Missouri                    
Nevada                                     
New Jersey -

~
Tennessee                            

~1r~iia                             

Oklahoma
Utah                               
Washington                          
Wisconsin                            
Wyoming                            
Undistributed                                    

 7,330, 412
 1,071
 100,342
 13, 751,970
 47, 904, 137
 .50
 50,217
 693,998} 2942948 23 03 '  8,~'~ 326, 500 5,582 1,227,840 831,314

$12, 606,369
(1)

182,613
40,474,951
118,947,968
38
123,234

3,328,467

8172955

1


(1)
(1)
(1)
3,290,389
(1).
21,959,815

7,873,228
53,531
28
258,947
15,201,619
62,874,891
51
13,410
215
666,550
3265912

11,278

~
355,006
6,492
1,486,776
985,852
 

$18, 090,992
(1)
(I)
598.497
43,765, 164
167,781,967
101
35,543
645
3,437,082

9678,564


(1)


(I)
(1)
3,998,287
(1)
2 2,319,061



75,198,084

189,086,799

93,053,994

249,705,903

I Included under "Undistributed." 2 Includes value for States entered as
"(1)."
PRINCIPAL MINES
 The importance of large operations in the iron-mining industry is shown
by the fact that 18 units yielding more than 1,000,000 tons each produced
56 percent of the entire output in 1941. Of the 18 millionton producers in
1941, 13 are in Minnesota (all on the Mesabi range), 2 in Alabama, 1 each
in Pennsylvania and Wisconsin, and 1 in Michigan. Of the 18 principal producers
in 1941, 11 were open-pit operations, 4 were operated by underground methods,
and 3 were combinations. Except for 1 mine that produced magnetite, all the
principal mines produced hematite.