 The ore minerals are bornite and chalcocite. They are chiefly in quartz, but are not confined to any one of the gangue minerals. Bornite is in slight excess over chalcocite and is apparently of only one period of deposition. Chalcocite is of two  The Enrichment of Ore Deposits - Page 249by William Harvey Emmons - 1917 - 530 pagesFull view - About this book
 | Washington Academy of Sciences (Washington, D.C.) - Science - 1911 - 342 pages
...confined to the more basic portions of the greenstone schists, and the ore lies in well-defined shoots. The ore minerals are bornite and chalcocite. They...only one period of deposition. Chalcocite is of two periods—one confined to the upper portions of the vein, younger than, and filling a network of minute... | |
 | North Carolina. Department of Conservation and Development - Agriculture - 1911 - 146 pages
...values lie in well-defined ore shoots. The ores are boruite and chalcocite. They apparently prefer the quartz, but are not confined to any one of the gangue minerals. Bornite is present in slight excess over chalcocite and is apparently of only one period of deposition. Chalcocite... | |
 | North Carolina. Department of Conservation and Development - Geology - 1916 - 376 pages
...in well-defined ore shoots. "The ore minerals are bornite and chalcocite. They apparently prefer the quartz, but are not confined to any one of the gangue minerals. Bornite is present in slight excess over chalcocite, and is apparently of only one period of deposition. Chalcocite... | |
 | Geology - 1917 - 244 pages
...in well-defined ore shoots. "The ore minerals are bornite and chalcocite. They apparently prefer the quartz, but are not confined to any one of the gangue minerals. Bornite is present in slight excess over ehalcocite, and is apparently of only one period of deposition. Chalcocite... | |
 | Forests and forestry - 1917 - 380 pages
...well-defined ore shoots. • "The ore minerals are bornite and chalcocite. They apparently prefer the quart/, but are not confined to any one of the gangue minerals. Bornite is present in slight excess over chalcocite, and is apparently of only one period of deposition. Chalcocite... | |
 | Virginia. Division of Mineral Resources - Geology - 1925 - 762 pages
...well-defined ore shoots. "The ore minerals are bornite and chalcocite. They apparently prefer the quart/., but are not confined to any one of the gangue minerals. Bornite is present in slight excess over chalcocite, and is apparently of only one period of ili'|>osition. Chalcocite... | |
 | Geology - 1911 - 910 pages
...in well-defined ore shoots. The ore minerals are bornite and chalcocite. They apparently prefer the quartz, but are not confined to any one of the gangue minerals. Bornite is present in slight excess over chalcocite and is apparently of only one period of deposition. Chalcocite... | |
 | United States National Museum - Anthropology - 1911 - 834 pages
...apparently prefer the quartz, but are not confined to any one of the gangue mineralsBornite is present in slight excess over chalcocite and is apparently of only one period of deposition. Chalcocite is clearly of two periods: One confined to the upper portions of the vein, younger than, and filling a... | |
 | Henry Hinds - Coal mines and mining - 1916 - 612 pages
...in well-defined ore shoots. "The ore minerals are bornite and chalcocite. They apparently prefer the quartz, but are not confined to any one of the gangue minerals. Bornite is present in slight excess over chalcocite, and is apparently of only one period of deposition. Chalcocite... | |
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