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Bureau of Mines / Minerals yearbook: Metals, minerals, and fuels 1972
Year 1972, Volume 1 (1972)

Ampian, Sarkis G.
Clays,   pp. 301-327 ff. PDF (2.9 MB)


Page 308

 
 1971 1972 
State 
 Short tons Value Short tons Value 
Arizona                            
W 
W 
25,410 
$284,660 
California                                
Colorado                                 
Idaho                                   
33,932 
1,548 
W 
$1,047,583 
7,742 
W 
39,787 
929 
40 
923,027 
6,043 
120 
Mississippi                               
Missouri                                 
Montana                                 
Oregon                                  
Texas                                   
Utah                                    
280,635 
42,503 
228,624 
845 
W 
4,051 
3,396,447 
W 
1,663,732 
10,140 
W 
80,652 
277,596 
W 
233,390 
1,192 
88,220 
4,014 
3,387,514 
W 
1,489,361 
14,309 
1,127,937 
43,803 
Wyoming                                
Other States'                             
1,751,858 
321,763 
17,267,091 
4,468,428 
1,811,246 
285,174 
18,359,756 
3,693,987 
Total 2,665,759 27,891,815 2,766,998 29,330,517 
308 MINERALS YEARBOOK, 1972 W Withheld to avoid disclosing individual company
confidential data; included with "Other States."' Includes Alabama, Nevada,
Oklahoma, South Dakota, and data indicated by symbol W. 
in 1972. Fire clay exports declined 23% in tonnage and 19% in value. The
price of exported fire clay increased by $1.42 to $23.43 per ton. 
 Fire clay was exported to 41 countries, with Canada and Mexico receiving
40% and 38%, respectively. The other 39 countries received the remaining
22%. No imports of fire clay were reported during 
1972. 
 There are no price quotations in domestic journals for fire clay, but the
per-ton value reported by producers ranged from $2 to about $9. The reported
average unit value for fire clay produced in the United States increased
31% from $6.24 per ton in 1971 to $8.15 in 1972. 
BENTONITE 
 Bentonite production in 1972 increased 4% in tonnage and 5% in value over
1971. A general increase in domestic consumption, particularly in drilling
mud, animal feed, and oil filtering uses, offset decreased exports and a
decline in foundry sand applications. 
 Bentonite was produced in 15 States. Increased bentonite production was
reported for all States except Arizona, Colorado, Idaho, Mississippi, Oklahoma,
South Dakota, and Utah. 
 Generally, the high-swelling or sodium bentonites are produced chiefly in
Wyoming, Montana, and South Dakota. The calcium or low-swelling bentonites
are produced in the other States. 
 Dust collection and -control equipment was installed by Federal Bentonite
Co. and Kaycee Bentonite Co. in their Wyoming plants. 
 Chemical Marketing Reporter, December 25, 1972, quoted bentonite prices
as follows: Domestic, 200 mesh, bags, carload lots, f.o.b. mines, $l4.00—$l4.40
per ton; and imported Italian, white, high-gel, bags, 5-ton lots, ex-warehouse,
$116.60 per ton. The average unit value reported by producers of domestic
bentonite sold or used in 1972 was $10.60, a slight increase from the $10.46
average of the previous year. Per-ton values reported in the various producing
States ranged from $3 to $23, but as in 1971, the average value reported
by the larger producers was near the Wyoming average figure of $10.14. 
 Bentoni-te imports in 1972, including chemically activated and special-purpose
Italian material, totaled 2,853 short tons valued at $229,000 compared with
2,393 tons valued at $194,000 in 1971. The 2,853 tons of chemically activated
bentonite was imported from six countries, with Canada supplying 49%; Mexico,
29%; West Germany, 11%; Japan, 10%; and Ireland and the United Kingdom the
remaining 1%. Imports of Italian bentonite in 1972 increased from 66 short
tons in 1971 to 127 tons. 
 Bentonite exports in 1972 decreased from 663,000 short tons in 1971 valued
at $16.2 million to 521.000 tons valued at $15.1 million. Although the tonnage
exported decreased 21% from that shipped in 1971, the value decreased only
7%. The lesser decline in value was the result of the unit value of exported
bentonite increasing $4.58 per ton, from $24.43 per ton in 1971 
-to $29.01 per ton. This increase in per ton value was attributed to a large
decline in 
Table 12.—Bentonite sold or used by producers in the United States,
by State 


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