Page 40

 TABLE 10-Continued40  SURVEY METHODS AND STATISTICAL SUMMARY OF NONFUEL
MINERALS—1990 
COMPARISON OF WORLD AND U.S. PRODUCTION OF SELECTED NONFUEL MINERAL COMMODITIES
Mineral 
1989 
1990~ 
World 
. 
production' 
U.S. 
. 
production 
U.S. percent 
of world 
production 
World 
. 
production 
U.S. 
. 
production 
U.S. percent 
of world 
production 
INDUSTRIAL MINERALS—Continued 
Mica (including scrap and ground) metric tons 
229,523 
1 19,142 
52 
214,560 
108,845 
51 
Nitrogen: N content of ammonia thousand short tons 
109,142 
13,449 
12 
108,056 
13,940 
13 
Peat do. 
217,531 
761 
(6) 
198,489 
763 
(6) 
Perlite do. 
1,973 
12601 
30 
1,959 
12639 
33 
Phosphate rock (gross weight) thousand metric tons 
158,966 
48,866 
31 
154,106 
46,343 
30 
Potash (K2O equivalent) do. 
29,210 
1,595 
5 
28,310 
1,713 
6 
Pumice'° do. 
10,913 
424 
4 
10,964 
443 
4 
Salt thousand short tons 
209,949 
12 1338,902 
19 
202,339 
i2 ' ~40,738 
20 
Sand, industrial (silica) do. 
133,973 
5229,205 
22 
133,198 
1228,406 
21 
Sodium compounds, n.e.s. (natural and manufactured): 
31,939 
8,995 
28 
32,429 
9,156 
28 
Soda ash thousand metric tons 
Sulfate do. 
5,009 
685 
14 
4,998 
665 
13 
Strontium'° metric tons 
234,189 
— 
— 
234,600 
— 
— 
Sulfur, all forms thousand metric tons 
58,717 
1 1,592 
20 
57,668 
1 1,560 
20 
Talc and pyrophyllite do. 
8,271 
1,253 
15 
8,251 
1,267 
15 
Vermiculite'0 short tons 
694,700 
12275,000 
40 
645,933 
i2230000 
36 
not included in world total. 
' Estimated. "Preliminary. NA Not available. w withheld to avoid disclosing
company proprietary data; 
' For those commodities for which U.S. data are withheld to avoid disclosing
company proprietary data, the world total excludes U.S. output and the U.S.
percent of world production cannot be reported. 2Content of ore and concentrate.
3world total does not include an estimate for China. 
4U.S. figures represent dried bauxite equivalent ofcrude ore; to the extent
possible, individualcountry figures that are included in the world total
are also on the dried bauxite eqiuivalent basis, but for some countries available
data are insufficient to permit this adjustment. 
5Shipments. 
6Less than 1/2 unit. 
7Primary and secondary blister and anode copper, including electrowon refined
copper that is not included as blister or anode. 
tIncludes bullion 
9Refined nickel plus nickel content offerronickel, nickel oxide, and other
nickel salts. 
' °World total does not include estimates for output in the U.S.S.R.
or China. 
"Includes tin content of alloys made directly from ore. 
' 2Quantity sold or used by producers. 
' ~Includes Puerto Rico.