galena

How To Use galena In A Sentence

• At the Fallowfield lead mine, near Hexham in Northumberland, it is associated with witherite; and at Bromley Hill, near Alston in Cumberland, it occurs in veins with galena. Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria"
• Thus, if galena and zinc blende in acid solutions be connected in the usual manner by a voltaic pair, sulphuretted hydrogen is evolved from the surface of the former, and a current generated which is sufficient to reduce gold, silver or copper from their solutions in coherent electro-plate films. Getting Gold: a practical treatise for prospectors, miners and students
• The mineralization, consisting mainly of smithsonite (zinc carbonate), iron oxides and galena varied in true width from 2 to 5 metres. Marketwire - Breaking News Releases
• Closely allied to this subject is the investigation of the mode in which certain metals are reduced from their solutions by metallic sulphides, or, in common language, the influence which the presence of such substances as mundic and galena may exercise in effecting the deposit of pure metals, such as gold, in mineral lodes. Getting Gold: a practical treatise for prospectors, miners and students
• The second Expedition failed to find gold, but brought back argentiferous galena in copper-stained quartz, and possibly in the ochraceous red veins seaming the Secondary gypsum; with silicates and carbonates of copper: select specimens of the latter yielding the enormous proportion of forty per cent. The Land of Midian
• Galena is also found as larger isolated octahedral crystals within the coarse calcite cement in breccias in the upper parts of the core.
• Mineralization at the Haldane property is controlled by northerly trending structures, and consists of galena, sphalerite and tetrahedrite - tennantite in quart-siderite gangue. Marketwire - Breaking News Releases
• These crystals are associated with chalcopyrite, galena, quartz, calcite, epidote, and chlorite.
• There is a rough zonal arrangement of the ore minerals around the intrusive, gold and copper minerals (chiefly enargite and chalcopyrite) being more prominent near the intrusive, and argentiferous galena and zinc blende richer at greater distances. The Economic Aspect of Geology
• The ore shoot is mainly in the Molas Formation and is surrounded by a silicified envelope that contains galena, sphalerite, chalcopyrite, tetrahedrite, and pyrite.