TABLE 3 Production and Waste Allocation for Primary U.S. Metal Production, 1988 (1,000 metric tons)

U.S. Domestic Mine Production

U.S. Domestic Concentrate Production

U.S. Primary Metal Production (domestic and foreign ores)

Metal

Total Material Handled (A)

Ore Treated or Sold (B)

Overburden (A - B)

Production (metal content)

Production (gross weight)a (C)

Concentration Wastes (B - C)

Concentrate Consumption (gross weight)a (D)

Primary Production (total) (E)

Smelting/ Refining Losses (D - E)

Bauxite/

8,246b

1,107b

7,140

Aluminum

8,970c

4,575

4,395

7,730

3,944

3,786

Copper

523,446

218,631

304,814

1,341

5,364

213,267

5,794

1,406

4,388

Gold

536,146

117,934

418,212

0.201

0.201

117,934

392

0.138

392

Lead

9,707

6,450

3,257

385

481

5,969

83,694

392

98

Molybdenum

127,006d

72,212

54,794

43

172

72,040

103

26

77

Platinum group

34,189

11,396e

22,793

0.005

0.005

11,396

0.0003

0.0003

Silver

48,444

15,876

32,568

1.661

1.661

15,874

2

1.718

Zinc

21,149

9,106e

12,043

244

432

8,674

429

241

188

Uranium oxidef

22,000

15,200

6,800

20

15,180

20

5

15

Nonferrous total

1,330,333

467,912

862,420

11,046

460,334

14,960

6,016

8,944

Iron total

300,278

197,766

102,512

57,515

140,251

83,694

49,242

34,452

TOTAL

1,630,611

665,678

964,932

 

68,561

600,581

98,654

55,258

43,396

a Where direct figures for gross weight of concentrate were unavailable, they were calculated by applying reasonable concentration ratios to the metal content.

b Bauxite at U.S. mines. Included in total of "ore treated."

c Crude bauxite ore, dry equivalent. Includes net imports. Not included in "ore treated" total.

d Assumes 3:1 ratio material handled to ore, as with gold/silver.

e Zinc data have been subtracted from "other" in 1989 Minerals Yearbook to construct approximate platinum data.

f 1980 data.

SOURCE: Bureau of Mines (1988, 1989).



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