Report of the State Mineralogist, Issue 14California State Mining Bureau, 1916 - Gold mines and mining |
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Common terms and phrases
50 feet average width belt Bibl brick Bull Calaveras California claims clay comprises 40 acres copper country rock County crusher deposit diabase diorite ditch driven elevation employed equipment consists feet deep feet in length feet long feet of drifts feet of gravel feet of pipe feet wide footwall Forest Reserve Fork free milling French Gulch gold gossan granite granodiorite Gulch h.p. motor hanging-wall Hill hoist Idle inches iron Klamath Reserve Klamath River limestone located in Sec magnesite miles east miles north miles northeast miles south miles west mineral Mining Company Mokelumne Hill Mokelumne River Mountain Napa Napa County northwest operated owner patented Pay shoot Photo placer plant porphyry prospect pyrite quarry quartz quicksilver Railroad Ranch Report XII ridge River rock San Diego San Francisco sand schist serpentine Shasta slate bedrock southeast Southern Pacific Railroad southwest Springs Stanislaus River stope strike Sulphur tons Trinity Valley winze
Popular passages
Page 261 - By a Portland cement is meant the product obtained from the heating or calcining up to incipient fusion of intimate mixtures, either natural or artificial, of argillaceous with calcareous substances, the calcined product to contain at least 1.7 times as much of lime, by weight, as of the materials which give the lime its...
Page 875 - ... short tunnels and open cuts; ore, which is high-grade, occurs in connection with dikes of quartz-porphyry in serpentine, and consists of oxides, carbonates and sulphides. Idle. Bibl. : Bull. No. 50, p. 145. Copper Queen, in Sec. 16, T. 37 N., R. 7 W., in the Trinity Center mining district. Leased to GH Fitch. Comprises 3 claims; short tunnels and shaft; ore occurs in serpentine and consists of oxides and carbonates of copper, with a little sulphide at the lower levels. Bibl. : Bull. No. 50, pp....
Page 704 - ... and T. 32 S., R. 29 and 30 E.) offers some slight inducement on account of its anticlinal structure and age of formation, but no outcrop of oil sand is known and deep drilling would be necessary. SAN DIEGO COUNTY. The following description is by Dr. Frederick JH Merrill of the State Mining Bureau: "Petroleum of commercial interest has not yet been discovered in this county, although several wells have been and are being drilled, and the operators of these seem quite hopeful of success. In several...
Page 742 - Valley, with its northernmost tributaries, also portions of both the Sierra Nevada Mountains on the east and the Coast Ranges on the west, the two systems forming a junction at Mount Shasta in Siskiyou County.
Page 468 - ... Joaquin, flowing to the ocean, and Kings River, flowing to Tulare Lake. This river rises among the highest peaks of the Sierra Nevada, in the northeastern part of Tulare County, having two large forks flowing southwesterly 100 miles. 35 miles of which are through the grandest canons of the Sierra. It enters the valley near Bakersfield, then flowing westward divides into many channels, forming an extensive delta known as Kern Island. The river has a catchment area of 2,383 square, miles of the...
Page 755 - ... or within areas of eruptive rocks. It is rarely that any considerable bodies of ore have been found in this belt inclosed in unaltered sedimentary rocks, or in fact in metamorphic rocks other than schists. They are not commonly separated from their inclosing rocks by sharply defined boundaries, but fade out by gradual transitions from ore in which there is more or less waste to rock in which there is more or less ore, and finally into rock with only a small percentage of disseminated sulphides....
Page 538 - Development: by 4 tunnels, longest 365'. drifts and winzes, totaling 1.500' of underground workings. Equipment: 10-stamp. 25-ton mill built by present owners, air' compressor and engine. Water from the Fresno river furnishes power, except in the dry season, when a gasoline engine is used; there are 1% miles of ditch and flume. Employs 10 men. MADERA MINING CO. ARIZONA Machinery has been removed and property is idle. No funds. Address: 178 Main Avc..
Page 759 - There are nine levels 100 feet apart, eight raises from 50 to 560 feet in height, and 1100-foot crosscut on the Bully Hill claim. The lowest tunnel (No. 3 level) was run as a crosscut and struck the vein at a distance of 1100 feet, and about 600 feet below the gossan outcrop. At this point a station (100 feet square) was established, extensive hoisting and pumping machinery installed, and a 3-compartment shaft sunk to a depth of 950 feet. No. 3 level is connected by chutes and raises with the upper...
Page 56 - ... were rich on the surface and in the past were extensively worked for the gold values. The property is on the extreme east end of the Campo Seco copper belt. There are boilers, steam hoist, compressor and 10-stamp mill on the property. Idle. Ingomar Mining Company, 54 Auzerais Building, San Jose, Cal., owners. Napoleon Mine (copper). Located 10 miles southwest of Copperopolis. on Hog Mountain. The vein channel is about 100 feet wide, consisting of diabase and metadiabase to talcose schists. The...
Page 705 - 20 swallows do not make a summer,' so a few bottles, or even buckets, of oil do not make a commercial oil field. The discovery here of a substantial oil field would be of incalculable value, but can not with certainty be anticipated." SANTA CLARA AND SAN MATEO COUNTIES. The geology of San Mateo and Santa Clara counties is complex and has been partly described and mapped by the US Geological Survey (Santa Cruz Folio, No.