Metal-mining Practice, Issues 420-424 |
Contents
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Common terms and phrases
adit Ariz assay average bench blasting block caving body bottom broken Bureau of Mines cage Calif Cananea caps cars Circ compartments Copper Cost of Mining crosscuts cut-and-fill stoping deposits diameter District drift pillars Drill holes driving dumped employed equipment feet FIGURE filling foot footwall gate Gelatin dynamite Gold grade grizzly ground handling hanging wall haulage level haulageways Hematite hoisting horizontal Idaho inches inclined installed Kirkland Lake level interval locomotive long ton manway Marquette Methods and Costs Mexico Minas de Matahambre miners Mines Inf Mining Methods Mining Practice motors mucking Ontario Open stoping operations percent pipe pocket porphyry raises rock samples schist scraper shaft-sinking shovel shrinkage stoping sinking skip square-set stoping steel stoping method stulls sublevel caving Sublevel stoping timber tonnage tons top slicing top-slicing tramming Tri-State Tri-State district trolley undercutting underground United Verde United Verde Extension usually Utah vein
Popular passages
Page 480 - ... whose assays shall be final if within the limits of the assays of the two parties; if not, the assay which is nearer to that of the umpire shall prevail. The party...
Page 480 - The party whose assay is the farther from that of the umpire shall pay the cost of the umpire's assay for the constituent of the ores which is in dispute. In the event that the umpire's assay is equally distant from the assay of each party, costs will be split equally. In case of seller's failure to make or submit assays, buyer's assays shall govern.
Page 4 - For the purpose of the present discussion, it is sufficient to note that all these different types of equipment and supplies must be considered.
Page 223 - stop ing" is employed in its broader sense to mean operation of excavation of ore by means of a series of horizontal, vertical, or inclined workings in veins or large irregular bodies of ore or by rooms in flat deposits. It covers...
Page 44 - RJ, Mining Methods and Costs at the Teck-Hughes Gold Mines (Ltd.), Kirkland Lake. Ontario: Bureau of Minos Inf.
Page 328 - Their bed rock is slightly above the creek bed and the surface topography shows no indication of benching. River-bar placers: Placers on gravel flats in or adjacent to the beds of large streams. Gravel-plain placers: Placers found in the gravels of the coastal or other low-land plains. Sea-beach placers: Placers reconcentrated from the coastal-plain gravels by the waves along the seashore. Ancient beach placers: Deposits found on the coastal plain along a line of elevated beaches.
Page 480 - Any such ores which are delivered to the purchase depot shall, unless otherwise specifically agreed to by buyer, become the property of the buyer as liquidated damages for buyer's expense of weighing, sampling, and assaying, and after sampling may be placed in process, commingled, or otherwise disposed of by buyer. If seller has any question as to the quality of his ore, it is suggested that before shipment and delivery to the purchase depot a representative sample be submitted to the buyer or to...
Page 480 - One-tenth of 1 percent (0.1 percent) of the lead content by wet assay will be allowed free. The excess will be charged at 50 cents per pound, fractions in proportion. Moisture.- — A minimum deduction of 1 percent will be made from wet weight; when over 1 percent is contained, the actual moisture will be deducted.
Page 17 - Lead and zinc mining and milling in the United States; current practices and costs: US Bur.
Page 480 - Pay for 95 per cent (minimum deduction of one-half ounce) at the average Handy and Harman New York silver quotations for the calendar week, including date of arrival of last car of each lot at plant of Buyer; or, if higher, at the realized Mint price, provided silver qualifies for Government purchase and affidavit is furnished, less a deduction in either case of l1/^ cents per ounce.