| In the orebody galena occurred as large masses associated with pyrite, chalcopyrite, and tennantite. |
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| Vein minerals are barite, calcite, chalcopyrite, galena, pyrite, and sphalerite. |
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| This karsting provides highly permeable rocks in which the sulphide minerals sphalerite and galena represent the valuable mineralization. |
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| The primary ore minerals were not investigated, although galena and pyrite were found as relict masses on several occasions. |
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| Adjacent to the gray quartz with acanthite and gold is sugary white quartz with massive galena. |
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| These crystals are associated with chalcopyrite, galena, quartz, calcite, epidote, and chlorite. |
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| Similarly, silver has been described replacing a variety of silver minerals, pyrite, and galena. |
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| Microcrystals of pyrrhotite, goethite, pyrite, galena, and calcite are found on the dumps. |
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| On the dumps I found galena, pyrite, and rugs full of quartz, dolomite, and a few tiny, water-clear fluorites. |
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| Many choice specimens of sphalerite, calcite, galena, and dolomite could be collected from pillars and small areas not previously mined. |
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| With time and cooling, high-temperature galena cleanses itself of some of the bismuth and silver through the process known as exsolution. |
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| Gold occurs in quartz veins with chalcopyrite, galena, pyrite, and sphalerite. |
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| The pods were composed of large masses of black sphalerite containing vugs of petzite on gold, galena, rhodochrosite, chalcopyrite, and pyrite. |
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| As already mentioned, lead occurs in British Columbia, mainly in the form of argentiferous galena or silver lead ores. |
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| Some of the richer argentiferous galena pockets contained masses of mineral three or four inches in size. |
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| The total production to 1926 was about 5,000,000 tonnes of argentiferous galena from around 300 mines and prospects. |
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| One quick stop was made at the abandoned New First of May mine, where on the ore pile we found galena, pyrite, arsenopyrite, and fluorite. |
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| The main ore minerals are galena, chalcopyrite, sphalerite, and tetrahedrite that are associated with quartz and barite gangue. |
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| We have also noted clumps of small marcasite crystals as a late-stage association with galena and drusy quartz from the Eagle mine. |
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| Other minerals mentioned from the mine by Dunham include galena, sphalerite, pyrite, chalcedony, and minor marcasite and pyrrhotite. |
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| Here argentiferous galena was obtained, and the mine was worked for its silver. |
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| Interesting thin plates of silver coating rhodonite and diopside in massive galena are reported from the mines at Garpenberg, Sweden. |
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| The paragenetic relationships determined in this investigation indicate that sphalerite and galena are often intimately related in the form of dendrites. |
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| Stalactite-like structures were common in the Black Sheep pocket, forming knobs and fingers of matrix covered with druzy quartz, fluorite, and galena crystals. |
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| It is formed by the chemical action of carbonated water on the mineral galena. |
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| Powered by an acid and mineral energy an old galena radio exudes the elegies of a spectral prima donna on Baïa Ritm. |
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| The ore shoot is mainly in the Molas Formation and is surrounded by a silicified envelope that contains galena, sphalerite, chalcopyrite, tetrahedrite, and pyrite. |
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| He reported finding wulfenite, cerussite, anglesite, plattnerite, and massicot as alteration products of galena in three pegmatites at Saint Peters Dome. |
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| Almost all ores contain the lead sulfide mineral galena and small quantities of cadmium sulfide. |
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| The find did not become profitable at that time but was developed during World War I as the Potosi mine, a rich source of galena ore and silver. |
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| A common sulfide mineral that crystallizes in this manner is the ore mineral of lead, galena. |
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| The powder is obtained by grinding galena, a mineral extracted from mountain rocks. |
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| There are several generations of quartz veining, the latest of which appears to have associated sphalerite, galena, and minor chalcopyrite. |
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| The gold, sometimes free, is associated with quartz veins and stringers accompanied locally by iron oxides and hydroxides, galena and pyrite. |
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| The skarns also contain hornblende, calcite, pyroxene, tremolite, pyrrhotite, molybdenite, galena, chalcopyrite, arsenopyrite, garnet, and pyrite. |
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| Green kohl stretched to my eyebrows, and black galena acted as eyeliner. |
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| Sphalerite stalactites to 15 cm in diameter and coated with crystallized marcasite and galena are reported from the Marsden prospect near Galena, Illinois. |
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| The unoxidized sections consist primarily of marmatite ore, which is composed primarily of pyrite, marmatite, galena, siderite, and minor chalcopyrite. |
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| A common secondary mineral that is a minor ore of lead, it is usually formed by the oxidation of galena and often forms a concentrically banded mass surrounding a core of unaltered galena. |
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| The dominant minerals are pyrite, tetrahedrite, sulfosalt, sphalerite with lesser galena and chalcopyrite. |
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| You can easily extract lead from galena, a natural mineral which has been used in crystal radio receivers. |
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| Mineralization is comprised of pyrite, galena, sphalerite, sulphosalts and chalcopyrite hosted in a hydrothermal breccia matrix. |
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| The mineralization is basically formed of sphalerite, galena, chalcopyrite in a marble level or an anthophyllitecordylite-gahnite gneiss associated to sillimanite nodules gneiss and quartzic gneiss. |
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| For example, a mining engineer and geologist may target metallic ores such as galena for lead or chalcopyrite for copper. |
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| The main yields were lead and zinc ores, in particular galena, blende, cerussite and gossan. |
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| The mines were expanded in the 1790s and copper and galena were also extracted. |
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| The sulphide minerals consist of varying proportions of pyrite, pyrrhotite and sphalerite with lesser galena, arsenopyrite and chalcopyrite. |
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| Skeletal feldspar grains contain ankerite rhombs, and tiny sphalerite, galena, barite, and siderite crystals. |
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| This provides a measure of the relative Ag content of tetrahedrite and sulfosalts associated with galena. |
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| The dominant minerals are pyrite, tetrahedrite, sulfosalts, sphalerite, galena and chalcopyrite. |
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| Sulfide minerals identified within the zone include chalcopyrite, galena, sphalerite, tetrahedrite, and pyrite. |
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| The six diamond drill holes totalling 1,448 metres intersected conductive units, usually consisting of argillite with various amounts of pyrite and pyrrhotite as well as traces of chalcopyrite, sphalerite and galena. |
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| The accompanying heavy minerals were pyrite, scheelite, galena and barite. |
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| Mineralization consists of narrow, high-grade quartz-carbonate veins containing freibergite and tetrahedrite, native gold, galena, sphalerite, chalcopyrite and pyrite. |
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| The galena of the ore contains microscopic inclusions of various forms that become visible upon polished surfaces etched with hydrochloric or nitric acid. |
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| Geochemical surface sampling at Trapper has demonstrated that gold is associated with the sulphides pyrite, galena, sphalerite and chalcopyrite, plus sulphosalt minerals. |
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| The mineralization is comprised of pyrite, sphalerite, silver rich galena, chalcopyrite, arsenopyrite, tennandite, tetrahedrite, native gold, native silver and quartz. |
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