argentiferous การใช้

• These argentiferous galenas have long been the most important ore of silver.
• Ore minerals included cerargyrite, native silver, polybasite, and argentiferous galena.
• In 1903 the decision was made to stop separating the silver and to sell argentiferous lead to a smelting company.
• When actively mined, the silver vein of argentiferous galena ( silver-bearing lead ) was large and well defined.
• The sanjak in which G黰?_
  hane was situated at some stage comprised 37 mines of argentiferous lead and six copper mines.
• It covers a rich substrate which was exploited for the first mines of copper and argentiferous lead during the Gallo-Roman era.
• A famous archaeological site of this period is the northern Pennines at Brownhill, Cumbria, where lead ores were extracted from argentiferous lopes.
• Silver and lead extractions are also associated because the argentiferous ( silver-bearing ) ores used in the process often contains both elements.
• Some known areas in Iran containing argentiferous lead that could have been exploited at this time are Azerbaijan, Kerman, and the Miyana-Zanjan region.
• He had decided to return to France when he was approached by a friend who had good grounds for believing that a mine of argentiferous tin existed in Campbell Island.
• The basic process involved the mixing of argentiferous gold foil ( in later periods granules were used ), common salt and brick dust or burnt clay in a closed and sealed container.
• There are argentiferous ( i . e . silver-bearing ) galena deposits on Flat Holm; the pits and mounds visible on the surface of the island are a result of trial borings.
• However, the tetrahedrite is responsible for the majority of the silver produced by the Silver Valley, as it s the tetrahedrite interspersed in the galena of the district that makes it so argentiferous.
• In 1789, a Hungarian scientist, P醠 Kitaibel, discovered the element independently in an ore from Deutsch-Pilsen that had been regarded as argentiferous molybdenite, but later he gave the credit to M黮ler.
• The huge amount of Pre-Hispanic silver adornments known especially from Per? Bolivia and Ecuador raises the question whether the pre-Hispanic civilizations obtained the raw material from native ores or from argentiferous-lead ores.
• The lode in Lisdrumgormley is reported, on contemporary authority, to be still rich in argentiferous galena, embedded in a matrix of quartz and carbonate of lime in the deepest workings . so far as it is known, from 2 to 9 feet.