نتایج جستجو برای: chalcocite
تعداد نتایج: 143 فیلتر نتایج به سال:
Razzell, W. E. (British Columbia Research Council, Vancouver, Canada) and P. C. Trussell. Isolation and properties of an iron-oxidizing Thiobacillus. J. Bacteriol. 85:595-603. 1963. - An organism isolated from acidic copper-leaching waters has been shown to oxidize ferrous ions, sulfur, and metallic sulfides but exhibit peculiar responses to thiosulfate. The name Thiobacillus ferrooxidans has b...
Leptospirillum ferriphilum Sp-Cl is a Gram negative, thermotolerant, curved, rod-shaped bacterium, isolated from an industrial bioleaching operation in northern Chile, where chalcocite is the major copper mineral and copper hydroxychloride atacamite is present in variable proportions in the ore. This strain has unique features as compared to the other members of the species, namely resistance t...
The present study indicate that the copper mineralization in the area is of the nature of scattered sporadic occurrences of narrow lenticular and impersistent stringers and veins of copper-ore in vein-quartz and pegmatite traversing the amphibolite and garnetiferous mica schist country rock. The old workings for copper ore at Garimanipenta, which had a checkered history since early times, are b...
this paper presents the new geochemical isotopes sr and nd, and the mineralization data for the south neyshabour volcanic rocks located in ne iran. based on the chemical classifications, the studied rocks are basaltic trachy andesite, trachy andesite, trachyte, and trachy dacite in composition. all the analyzed volcanic rocks display enrichment in light rare earth elements (lree) relative to th...
The studied copper ore deposit is located in Miedzianka Mountain (Świętokrzyskie Mountains, central Poland). This was exploited from the 13th century to 1950s; therefore numerous historical adits are currently present. One of these Teresa adit (established 1805), consisting underground mining corridors and natural cave developed Upper Devonian limestones, partially transformed by works. Samples...
چکیده ندارد.
Masjeddaghi area is located about 35 km east of Jolfa, north of East-Azarbaidjan province. Field and mineralogical studies show that quartz-diorite subvolcanic stock and quartz-andesitic volcanic rocks in this area were altered by both hypogene and supergene hydrothermal solutions. Alterations are genetically affiliated with four groups of (1) quartz, (2) sulfide, (3) sulfate, and carbonate vei...
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