Report of the State Mineralogist . ed by system of belt conveyors to a sorting plant equipped witha 36-foot belt, 3 feet wide. Magnesite conveyed to a screen where itis washed and the fines rejected. Washed magnesite burned in a6 x 60 rotary calciner, then distributed to cooling bins by a drag con-veyor. Finally ground to pass 100 mesh screen. Capacity of plant 30 328 MINES AND MINERAL RESOURCES. tons per day. When operating, 35 men are employed. Idle. Owner,Magnesco Refractory Products Company; Wellman Lewis Company,Hibernian Bank Building, Los Angeles, California. Bibl.: U. S. G. S. Bull. 35
Report of the State Mineralogist . ed by system of belt conveyors to a sorting plant equipped witha 36-foot belt, 3 feet wide. Magnesite conveyed to a screen where itis washed and the fines rejected. Washed magnesite burned in a6 x 60 rotary calciner, then distributed to cooling bins by a drag con-veyor. Finally ground to pass 100 mesh screen. Capacity of plant 30 328 MINES AND MINERAL RESOURCES. tons per day. When operating, 35 men are employed. Idle. Owner,Magnesco Refractory Products Company; Wellman Lewis Company,Hibernian Bank Building, Los Angeles, California. Bibl.: U. S. G. S. Bull. 355,. pp. 38-39. MANGANESE. Manganese deposits occur in a small area in the northern part of theIronwood Mountains, and in the west end of the Maria Mountains, inRiverside County, both areas in the Ironwood district. The deposits in the Ironwood Mountains are included in the BlackJack, Melville and the Social Claim groups. In the Maria Mountains ore has been produced from the Dioxide, butadjoining are a number of undeveloped Photo No. 40. Hemet Magnesite Mine, Winchester, Riverside County. A group of claims of the United States Gypsum Company lies northof the Dioxide group. The deposits are accessible by roads that leadfrom Browns and from English Siding, points on the Southern Cali-fornia Railroad. The deposits in the Ironwood Mountains are 10 miles west of BrownsSiding; those in the Maria Mountains are 5 miles west of EnglishSiding. Most of the ore shipped in this district in 1917 and 1918 containedover 40 per cent, manganese, from to 2 per cent, of iron, and from3 to 8 per cent, of silica. The manganese deposits of the IronwoodMountains are contained in veins or shear zones that cut a sheared andintrusive igneous rock. Veins strike north and south and havesteep dips. The manganese deposits in the Little Maria Mountains are containedin a wide zone of brecciation in massive limestone and in zone of brecciation strikes N. 60° W. RIVERSIDE COUNTY. 329 T
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectminesandmineralresou
