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enrichment of disseminated copper ores
Sampling and Estimating Disseminated Copper Deposits
The ideal method for determining the assay content of a disseminated orebody is to check at least every fifth drill hole by a raise or test pit 50 or 100 ft. (15 or m.). high or deep. One tenth of all material removed from each round shot in these workings should be taken as a bulk sample, and the walls should be carefully channeled.
The trace and rare earth element contributions to the ... SpringerLink
Apr 26, 2021The Chouichia ore deposits are one of the most important polymetallic CuFerich mineralizations located in the front of the thrust zone of the Tunisian Tellian belt. This mineral occurrence is carried by veins and breccias hosted by the Upper Cretaceous to OligoceneLower Miocene sediments in the Fej Et Tamer tectonic corridor. Geochemical work carried out on host rock and mineral samples ...
AUAGTE VEIN DEPOSITS (MODEL 22b; Cox and Bagby, 1986) USGS
Disseminated deposits: Potassium feldsparpyrite alteration is characterized by pervasive flooding of finegrained sanidine, orthoclase, and adularia along with moderate to strong sericitization and fine to mediumgrained pyrite. This alteration is most prominent in the broad vuggy permeable zones within 300 m of the surface. Strong potassium
Supergene Enrichment Profile at Copper Basin Battle Mountain, Nevada
The observation that enrichment is incipient in some areas of the Copper Basin System is reinforced by variations of the copper mineralogy present based on optical analyses and analytical analyses. Mineral phases identified include: chalcocite (Cu 2 S), covellite (CuS), and intermediate mineral phases between chalcocite and covellite.
Origin of the secondary REEminerals at the Paratoo copper deposit near ...
The Paratoo copper deposit, located in the Neoproterozoic to Cambrian Adelaide Geosyncline, South Australia, produced around 360 tons of Cu between 1888 and 1967 from oxidized ores. ... At depth, drill cores reveal disseminated magnetite, pyrite, chalcopyrite, copper sulphide and native copper associated with extensive potassic alteration. KNa ...
Iron OxideCopperGold (IOCG) Deposits of Australia
Enrichment of copper minerals can occur at the top of IOCG deposits. This type of alteration is known as supergene enrichment zone where the copper minerals malachite, cuprite, native copper, digenite and chalcocite predominant. IOCG deposits which are high in the iron minerals magnetite and hematite, can become economic iron ore deposits.
History of Uranium Mining in Central Europe IntechOpen
The uranium ores were mined as byproduct of copper mining. The uranium mineralisation in the Novoveská Huta ore deposit (Gemericum) occurs in two horizons of Permian volcanosedimentary formation. The upper horizon is a part of volcanosedimentary complex of volcanoclastic sandstones and conglomerates overlying rhyolites and their tuffs.
Secondary Enrichment of Copper at the Madison Gold Skarn Deposit ... CORE
Jasperoid and Secondary Copper Enrichment Three of the features of the Madison Gold deposit that set it apart from typical CuAu skarns are: 1) the presence of goldbearing, Ferich jasperoid cut by calcite veins; 2) the presence of small but very highgrade bodies of chalcocite ore; and 3) the presence ofunusual concentrations of native ...
Leached Outcrops as Guides to Copper Ore Google Books
Page 114 Columnar sections are represented by lines of dashes and dot* places in Sonora and British Columbia, concludes that in the field the capping over known disseminated ore usually has a deep maroon to sealbrown color and that the bright red or brickred cappings have nowhere been observed except over pyritic areas where the copper content of the enriched zone, as a whole, averaged ...
Metallic Deposits CliffsNotes
Metallic ore deposits, however, are relatively rare concentrations of metal‐bearing minerals (usually sulfides) that contain enough metal to be profitably mined. Again, the profit line is dependent on a number of economic factors. ... An important type of disseminated deposit is the porphyry copper deposit, in which copper and molybdenum are ...
The Source of Gold Its Ores and Minerals EzineArticles
Native gold may occur in the primary, secondary enrichment, or oxidized zones. The tellurides, which are usually associated with pyrite, are widely distributed, though not so abundant, but not always recognized; indeed by some miners they are mistaken for sulphides. General Types of Gold Ores:
Magmatic origin of giant ''Kirunatype'' apatiteironoxide ores in ...
In combination with their exclusive occurrence close to the ore zone, this observation suggests a genetic relationship between ironoxide ores and the REEenrichment in hydrous alteration ...
Final ES ExamMineral Resources Flashcards | Quizlet
Many ore deposits, such as copper and silver, result when weathering dissolved scattered bits of ore and percolating water carries the dissolved metals to the subsurface, where they precipitate in cracks as a more concentrated deposit. This makes them more economically viable to mine. "Supergene enrichment"
Porphyry copper systems, zones of oxidation and secondary enrichment
•enrichment blankets at many porphyry copper deposits form large laterally extensive zones ranging from 200 to 1,000 feet in thickness (up to 2,500 feet at chuquicamata), generally thin 10 to 100 feet •copper content of enrichment blankets generally ranges from two to eight times greater than nonenriched primary sulfide mineralization ( to .
Nickel Ores | Article about Nickel Ores by The Free Dictionary
They form beds, lentils and veins of rich ores, as well as zones of less rich disseminated ores, which are characterized by varying ratios of pentlandite to copper sulfides and pyrrhotine. Disseminated, brecciated, and massive ores are widespread. The nickel content in sulfide ores ranges from to percent and more.
Geology, Sulfur Isotopes and The Origin of The Heath Steele Ore ...
The ore deposits of zinc, lead, and copper are associated with minor folding and/or sheared dilatent zones at or near the contact between porphyry and finegrained senicitic schist. ... ( to ) covered by the ratios is narrow, and suggestive of a well homogenized source of mineral solutions. The enrichment of S/sup 34/ in the ore ...
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