Jamesonite


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Related to Jamesonite: stibnite

Ja´me`son`ite


n.1.(Min.) A steel-gray mineral, of metallic luster, commonly fibrous massive. It is a sulphide of antimony and lead, with a little iron.
References in periodicals archive ?
Mapping and prospecting during phase two also discovered numerous other mineralized veins elsewhere within the Granite Creek drainage.The largest of these veins is up to two metres wide and is intermittently exposed for 75 m along strike, on the western side of the Granite Creek basin.This vein hosts patchy massive and semi-massive arsenopyrite, galena and jamesonite.Assays from the phase two sampling are pending.
Stage 4 is marked by a mineral assemblage composed of quartz + antimony-lead-silver sulfosalt minerals (Figure 4(r)) that prevailingly include boulangerite and jamesonite, as well as minor bournonite, tetrahedrite, and andorite.
Selective leaching of antimony and arsenic from mechanically activated tetrahedrite, jamesonite and enargite.
They can be weakly mineralized in places with arsenopyrite, pyrite and rare jamesonite and boulangerite in a quartz gangue.
Gold mineralization in the 2004 Phase 1 drill holes was in the form of fine grained and visible free gold associated with quartz veins, stockworks and quartz rich shear zones containing between 1 percent to 3 percent pyrite, arsenopyrite and jamesonite.
Jamesonite, wurtzite, and pyragyrite have also been identified by investigations to date.
In the Keyue deposit, the ore minerals include sphalerite, galena, pyrite, arsenopyrite, chalcopyrite, tetrahedrite, freibergite, boulangerite, jamesonite, bournonite, and stibnite; the gangue minerals are mainly Mn-Fe carbonate, quartz, and calcite (Figures 4-6); and the supergenesis generates the minerals that prevailingly include ferrohydrite, sardinianite, valentinite, malachite, and siliceous sinter (Figure 7).
Among the generous number of photographs there are photomicrographs, including SEM images, imparting exquisite close-ups of oriented inclusions, striations, faden lines, jamesonite rings and cylindrite cylinders, and all manner of other micropheomena.
A vug in the footwall of the Contacto vein, on Level 250, yielded brilliant crystals of arsenopyrite, wolframite, jamesonite and bismuthinite perched on spongy quartz.
Other collectible species include: native silver, pyrargyrite, argentiferous tetrahedrite, freibergite, sphalerite, galena, quartz, siderite, pyrite, marcasite, boulangerite, jamesonite, acanthite, cerussite, hawleyite (type locality), barite and anglesite.
Scheelite, tetrahedrite, cassiterite, pyrrhotite and fibrous sulfosalts including jamesonite and boulangerite are locally important and have been collected specifically for their specimen value.
Some fluorite crystals appear blue-green and have a matte luster; a close inspection of these reveals inclusions of countless hairlike crystals of jamesonite. Once in a while, irradiated specimens of Yaogangxian fluorite are offered.