What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
adit Almaden amount assay basalt Bella Union Bibl bien Bull California chamber Chapter rep cinnabar claims coarse-ore furnace concentrates condenser system cost country rock Creek crosscut crushed dike district driven dumps feet fine-ore furnace flasks of quicksilver flotation Franciscan Froth fuel gangue gases Geol geology Idria Lake County material mercury metacinnabarite metal miles mill mineral Napa County northwest Oat Hill occurs operation orebody outcrop output owner period Photo pipe plant Plate pounds present production prospect pyrite quartz quicksilver quicksilver deposits Quicksilver Mining Company reduction equipment Report XV rhyolite ridge sample San Benito County San Francisco San Luis Obispo sandstone Santa Scott furnace screen serpentine shaft shale siliceous silver solution Sonoma County soot southeast stopes sulphide Sulphur Bank surface Surv tailings temperature timber tons tube tunnel underground vapor vein writer zone
Page 23 - Becker1 reports admixtures of metallic mercury in the sulphide thus thrown down. Here, then, we have a possible explanation of the frequent association of free mercury and the black metacinnabarite, although relief of pressure may be in some cases the equivalent of dilution as a precipitant. Organic matter, also, is a probable agent of reduction, by which the metal is liberated. Bituminous substances, such as idrialite, napalite, etc., are commonly associated with cinnabar; and at the...
Page 363 - Preliminary Reports. •Preliminary Report No. 1. Notes on Damage by Water in California Oil Fields, Dec., 1913. By RP McLaughlin •Preliminary Report No. 2. Notes on Damage by Water in California Oil Fields. Mar., 1914. By RP McLaughlin •Preliminary Report No. 3. Manganese and Chromium, 1917.
Page 154 - Large bodies of croppings can be found in each of these ridges, having also a general northwestern trend, but not coinciding with the backbone of the ridges. "In the New Almaden ridge the most extensive orebodies have been found in and close to Mine Hill, the highest peak of the ridge, lying in its southeastern part. From this point going northwestward the...
Page 363 - Waring, 1914 2.00 •Bulletin 70. Mineral Production for 1914, with Mining Law Appendix. 1915 •Bulletin 71. California Mineral Production for 1915, with Mining Law Appendix and Maps. — Walter W. Bradley. 1916 Bulletin 72.
Page 328 - ... parties to commence gathering it in the vicinity of the locality now known as Cinnabar, where the surface-soil over a considerable area contained these particles of rich ore, much of which had been carried by the water and lodged along the adjacent ravines. Washing these ravines with rockers afforded the miners good wages for some time, when they finally came upon the veins from which these fragments had escaped, and which were found to be large and well charged with metal.
Page 257 - In condensing the quicksilver-fumes discharged from a roasting-furnace, the problem is much more difficult. The quicksilver-fumes furnish often less than 1 per cent., by volume, of the products of combustion with which they are mixed. Even the weight of the quicksilver is inconsiderable, compared with that of the gases which pass through the condensers. At New Almaden it is only about 2 per cent of the latter. These facts add greatly to the difficulties of condensation. For, in the first place, more...
Page 23 - Schrauf,'' who has studied the occurrence of mercury ores in Idria, is that the metal may be liberated by the direct dissociation of cinnabar vapor. He also ascribes the formation of some metacinnabarite to the action of hydrogen sulphide upon native mercury. Here again we are reminded that the same point may be reached by more than one road.
Page 358 - On Mineral Vein Formation now in Progress at Steamboat Springs Compared with the Same at Sulphur Bank.
Page 323 - Moore filter-leaf of the usual construction and the cake washed free of silver solution with water. The basket is then lowered Into the sodium sulphide solution and this solution drawn through the cake until the effluent shows only a trace of mercury. Usually 1 ton of solution per ton of residue is sufficient.
Page 25 - Dana1 rarely showing trapezohedral faces; also acicular prismatic. In crystalline incrustations, granular, massive; sometimes as an earthy coating ('paint'). The writer has a hand specimen from the CulverBaer Mine, Sonoma County, California, (see Plate IV) showing beautiful , transparent, somewhat tabular crystals, up to a quarter-inch across. Cleavage: prismatic perfect. Fracture subconchoidal, uneven. Somewhat sectile.