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MINERAL INDUSTRY, CALIFORNIA, 1915

DATA COMPILED FROM DIRECT RETURNS FROM PRODUCERS IN ANSWER TO INQUIRIES SENT OUT BY CALIFORNIA STATE MINING BUREAU, FERRY BUILDING

SAN FRANCISCO, CAL.

CHAPTER ONE.

Mineral output in California during the year 1915 amounted to $96,663,369 worth of crude materials. There were forty-nine different mineral substances, and of the fifty-eight counties in the state all but two contributed some mineral product.

As compared with the 1914 output, the two notable features are the almost startling increases in some of the metals, and the decrease in petroleum, both in quantity and total value. The result, however, is a net increase in the grand total value, of $3,348,596 over the 1914 total.

Of the metals: Antimony again entered the active list after an absence of several years. Copper increased over 10,000,000 pounds in amount and $3,114,192 in value. Gold increased $1,788,800. Quicksilver increased about 25% in amount and more than doubled in value. Tungsten increased from a value of $180,575 to $1,005,467. Zinc increased from 399,641 pounds, worth $20,381, to 13,043,411 pounds valued at $1,617,383.

Petroleum decreased approximately 12,000,000 barrels in amount, but the average price per barrel was slightly higher, so that the net result was a decrease in value of $3,983,272.

The figures of the State Mining Bureau are made up from reports made by the producers of the various minerals. Care is exercised in avoiding duplication, and any error is doubtless upon the side of underestimation.

It would be folly to attempt to set a limit of maximum mineral production for California, because the mineral resources are so extensive and have been so slightly developed along many lines.

California yields commercially a greater number and variety of mineral products than any other state in the United States; and possesses latent possibilities in other items as yet undeveloped. The total annual value of her output is surpassed by but four other statesthey being the great coal and iron producers of east of the Mississippi

River. Of several items, including borax, chrome and magnesite, California is the sole producer. For several years we have been leading all others in gold, petroleum, platinum and tungsten; but surpassed in 1915, for the first time in petroleum by Oklahoma.

The following table shows the yield of mineral substances of California for 1915, as compiled from the returns received at the State Mining Bureau, San Francisco, in answer to inquiries sent to producers :

Substance

Amount

Value

510 tons
143 tons

410 tons
17,789 tons
67,004 tons
180,538 M
4,918,275 bbls.

3,725 tons 157,866 tons

10,299 tons
40,968,966 lbs.

4,192 tons
1,800 tons
692 tons

Antimony ore
Asbestos
Barytes
Bituminous rock
Borax
Brick
Oement
Ohromite
Olay-pottery
Coal
Oopper
Dolomite
Feldspar
Fuller's earth
Gems
Gold
Gypsum
Infusorial earth
Iron ore
Lead
Lime
Limestone
Lithia
Magnesite
Manganese ore
Marble
Mineral paint
Mineral water
Natural gas
Petroleum
Platinum
Potash
Pumice
Pyrite
Quicksilver
Salt
Sandstone
Silica (sand and quartz).
Silver
Slate
Soapstone and talc..
Soda
Stone, miscellaneous*
Tungsten concentrates
Zinc

20,200 tons
12,400 tons

724 tons
4,796,299 lbs.
356,534 bbls.
146,324 tons

91 tons 30,721 tons

4,013 tons 22,186 cu. ft.

311 tons 2,274,267 gals. 21,992,892 M cu. ft. 91,146,620 bbls.

667 ounces 1,076 tons

380 tons 92,462 tons 14,199 flasks 169,028 tons 63,350 cu. ft. 28,904 tons

$35,666 2,860

620 61,468 1,663,521 1,678,756 6,044,950

38,044 133,724

26,662 7,169,567

14,504 9,000 4,002

3,565 22,442,296

48,953 62,000

2,584 225,426 286,304 156,288

1,365 283,461 49,098 41,518

1,756 467,738 1,706,480 43,503,837

21,149 19,391

6,400 293,148 1,157,449 368,737

8,438 34,322 851,129

5,000 14,750

83,485 5,011,108 1,005,467 1,617,383

1,000 squares
1,663 tons
5,799 tons

962 tons 13,043,411 lbs.

Total value

$96,663,369

*Includes granite, macadam, rubble, paving blocks, sand and gravel, and grinding mill pebbles.

The following table shows the comparative values of the several minerals produced in California during the years 1914 and 1915 :

:

Substance

1914

1915

Increase

Decrease

$35,666

1,330

$2,380 105,150

180,021

$1,530

3,000 166,618 1,483,500 2,288,227 6,558,148

9,434 167,552

28,806 4,055,375

[blocks in formation]

16,565
5,928

3,970
20,653,496

78,375 80,350

5,128 183,198 378,663 517,713

29,422 18,350 2,544

42,228

92,359 361,425

Antimony ore
Asbestos
Barytes
Bituminous rock
Borax
Brick
Cement
Ohromite
Clay-pottery
Coal
Copper
Dolomite
Feldspar
Fuller's earth
Gems
Gold
Gypsum
Infusorial earth
Iron ore
Lead
Lime
Limestone
Lithia
Magnesite
Manganese ore
Marble
Mineral paint
Mineral water
Natural gas
Petroleum
Platinum
Potash
Pumice
Pyrite
Quicksilver
Salt
Sandstone
Silica (sand and quartz).
Silver
Slate
Soapstone and talc.
Soda
Stone, miscellaneous
Tungsten concentrates
Zinc

$35,666
2,860

620
61,468
1,663,521
1,678,756
6,044,950

38,044 133,724

26,662
7,169,567

14,504
9,000
4,002

3,565
22,442,296

48,953
62,000

2,584
225,426
286,304
156,288

1,365 283,461

49,098 41,518

1,756
467,738
1,706,480
43,503,837

21,149
19,391

6,400
293,148
1,157,449
368,737

8,438 34,322 851,129

5,000 14,750

83,485 5,011,108 1,005,467 1,617,383

1,365 169,081 47,598

7,314

909

8,431

657,010

3,983,272

114,380

1,500 48,832

847 476,169 1,049,470 47,487,109 14,816

460 1,000 230,058 557,846 583,553 45,322 22,688 813,938

[blocks in formation]

4,500 115,396 4,860,357 180,575 20,381

150,751 824,892 1,597,002

$93,314,773

$96,663,369

Totals

$3,348,596

Net increase

2-25437

The following table shows the comparative value of the mineral production of the various counties in the state for the years 1914 and 1915 :

[blocks in formation]
[blocks in formation]

Alameda
Alpine
Amador
Butte
Calaveras
Colusa
Contra Costa
Del Norte
El Dorado
Fresno
Glenn
Humboldt
Imperial
Inyo
Kern
Kings
Lake
Lassen
Los Angeles
Madera
Marin
Mariposa
Mendocino
Merced
Modoc
Mono
Monterey
Napa
Nevada
Orange
Placer
Plumas
Riverside
Sacramento
San Benito
San Bernardino
San Diego
San Francisco
San Joaquin
San Luis Obispo..
San Mateo
Santa Barbara
Santa Clara
Santa Cruz
Shasta
Sierra
Siskiyou
Solano
Sonoma
Stanislaus
Sutter
Tehama
Trinity
Tulare
Tuolumne
Ventura
Yolo
Yuba
Asbestos, unapportioned

3,211.109
1.755.782
2,005,954

32.251
1,149,321

5,938 149,226 7,484,473

30,553 233,332

250,529 2,085,112 28,040,296

740 63,503

4,568
4,665,504

203,009
554,137
187,505

560
1111,701

1,252 16,060 114,254

971,748 3,330,940 8,831,763 1,097,098

161,308 1,580,805 2,629,244

436,259 1,616,537

315,267 119,889 129,930

63,465 246,478 2,686,309

266,956 1,642,958 5,047,838

725,129

385,825 1,683,866 326,144 25,882

4,063,762 1,622,245 2,161,893

16,003 1,309.505

4,524 428.336 8,152,300

46,667 358,686

77,433 2,771,042 25,335,184

18,608 72,534

870 4,168,612

145,063 160,528 412,326 24,536 94,032

8,681 109,425

84,986 884,221 3,492,946 6,617,112

963,860

745,715 1,349,591 2,562,281

642,065 2,674,042

211,129 128,270 248,394 227,632

177,891 3,984,966

635,229 1,581,531 8,350,133

729,518

514,094 1,335,923

276,104 191,771

[blocks in formation]

Totals

$93,314,773

$96,663,369

1Includes output of a gold dredge in Stanislaus County.

2 See Merced.

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