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

Wells, J. Robert
Feldspar, nepheline, syenite, and aplite,   pp. 515-523 ff. PDF (964.9 KB)


Page 515

  515Feldspar, Nepheline Syenite, 
and Aplite 
By J. Robert Wells 
 Domestic production and consumption of crude feldspar declined slightly
in 1972, amounting to 99% of the respective 1971 figures and to 97% of those
for the record year 1969. Simultaneous increases in utilization of both domestic
aplite and imported nepheline syenite, however, brought the 1972 total U.S.
consumption of the three feldspathic materials substantially above the corresponding
total for 1971 and even farther above that for 1969. A notable feature of
the 1972 feldspar situation was the sharp drop in ground feldspar imports,
although again that decrease was more than balanced by increased imports
of nepheline syenite. 
 Until about World War I it was customary to report all feldspar statistics,
both crude and ground, in terms of short tons, but at that time it became
the practice to 
record crude feldspar production, imports, and consumption in long tons.
It is now felt that any advantages of *that system have long been outweighed
by the difficulty of direct comparisons and by the multiple opportunities
for confusion, and that a return to the earlier practice is justified. Beginning
with the present 1972 Minerals Yearbook chapter, all feldspar and nepheline
syenite data, without exception will be reported in short tons. 
Legislation and Government Programs. 
—According to provisions of the Tax Reform Act of 1969, which continued
in force throughout 1972, the depletion rate allowed on feldspar production
(both domestic and foreign operations) was 14%. 
 0 Physical scientist, Division of Nonmetallic Minerals. 
Table 1.—Salient feldspar statistics 
1968 
1969 
1970 
1971 
1972 
Uhited States: 
Crude: 
Sold orused by producers short tons_ 
 Value thousands.. 
 Average value per short ton     Imports for consumption    short tons -
 Value thousands.. 
 Average value per short ton      Consumption, apparent '     short tons
- 
747,800 
$8,265 
$11.05 
- - 
747,800 
754,863 
$8,869 
$11.75 
 52 
$7 
$134.62 
754,915 
726,069 
$9,638 
$13.27 
252 
$23 
$91.27 
726,321 
742,810 
$9,969 
$13.42 
134 
$19 
$141.79 
742,944 
732,439 
$10,372 
$14.16 
187 
$23 
$123.00 
732,626 
Ground: 
 Sold by merchant mills short tons_ 
 Value thousands.. 
 Average value per short ton       
 Exports shorttons.. 
 Value thousands~ 
 Average value per short ton     Imports for consumption    short tons..
 Value thousands.. 
 Average value per short ton       
World: Production thousand short tons.. 
730,737 
$9,242 
$12.65 
14,326 
$366 
$25.55 
3,782 
$91 
$24.06 
2,473 
793,052 
$10,465 
$13.20 
6,325 
$358 
$56.60 
5,201 
$128 
$24.61 
2,697 
647,995 
$9,458 
$14.60 
5,570 
$195 
$35.01 
3,637 
$93 
$25.57 
2,786 
601,618 
$8,716 
$14.48 
3,984 
$141 
$35.39 
2,375 
$65 
$27.38 
2,749 
580,801 
$8,990 
$15.48 
5,275 
$184 
$34.88 
945 
$20 
$24.34 
2,635 
' Measured by quantity sold or used by producers plus imports 


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