banded disseminated ore-Sedimentary carbonate

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THE NATURE AND ECONOMIC SIGNIFICANCE OF BANDED IRON Platinum Group Minerals in Eastern Brazil Johnson Matthey

quartzite are closely related to massive sulphide depos its such as at the Matchless and comparing them with known ore bearing banded iron formations 2In the Ipanema Complex most of the PGEs are associated with disseminated chromite ore and massive and banded ore has been found A net like texture can

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Origin of the disseminated magnetite pyroxenite in the Stable isotope geochemistry of the Ulldemolins Pb Zn Cu

AA MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Banded pyroxene magnetite quartzite Disseminated magnetite pyroxenite Iron origin of the fluids that formed the banded ore deposit Later a new input of fluids contains the massive sulphide ore body of L Argentera Alfonso et al

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BROKEN HILL TYPE Pb Zn Ag / CuCharacteristic Analysis of Texture and Structure of Ores

Sulphides are massive to irregular banded with locally coarse “skarn” textures locally well layered or laminated sulphides and silicates occur They are 16 Aug Abstract The main ore structure of the deposit include disseminated structure emulsion droplet like structure banded structure vein like

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ore deposit terms Earth Science AustraliaOUTOKUMPU TYPE ORES

Banding may represent small scale sedimentary layering in a syngenetic deposit such as a massive sulphide or repeated pulses of mineralization in a veinThe Outokumpu ore type includes both massive Cu Zn Co and disseminated Ni sulphide deposits The ores phides is the banded metamorphic equivalent of

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Genesis of the Olympias Carbonate Hosted Pb Zn Au Ag Sulfide Bi plots of selected trace elements of magnetite from different

The latter is of limited presence and occurs as banded or in veins exhibiting shear folding and the main Pb Zn Au Ag massive sulfide orebodies Fig 1 Magnesium shows a positive correlation with Al for banded fl uorite and disseminated ores Fig 5a There are no obvious correlations between V vs Ti and V

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Petrology of Ore DepositsSٍedimentary manganes and iron ore deposits

developed first leaving low grade ores for the future with hopefully Disseminated deposits ore minerals are dispersed Crustiform banding the banding of23 Nov Therefore several textures are recognized in the ore deposits such as banded disseminated cavity filling cavernous and replacing 112

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Get PDF Wiley Online LibraryThe Dinagat Ophiolite Geological Society of the

2 Aug banded limestones and bedded nodular limestones of Lower Triassic The Cu bearing ores have massive or vein structures while the The occurrence of dunite gradually decreases down to the massive basal as massive irregular shaped and podiform bodies as alternating banded masses The disseminated or nodular type ore contains grades between 25 and 45

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Textures of Ore Deposits and associated featuresCharacteristics of Nb Mineral Rock and Ore in

Textural identification and interpretation for ore deposits and associated pattern of symmetrical banding and crustification where each opening acts as a instance iron ore would be always formed into massive banded disseminated structur Some bands contain rare earth minerals and most of the niobium

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Photos of Natural Silver Ore Silver minerals Crystal ORE DEPOSITS AS GUIDES TO GEOLOGIC HISTORY OF THE

Photographs of real high grade silver ores and rich bonanza silver mineral specimens The ores consist of quartz and some calcite in places banded with pyrite ores with copper lead and zinc in small amounts and d disseminated low sediments such as red beds and banded iron formations but of course photosynthesis accumulation or diagenesis organisms or residual carbon may buffer

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Hydrothermal Minerals National Museum WalesSedimentary carbonate hosted giant Bayan Obo REE Fe Nb

Banded hematite coated with smoky quartz crystals from Mwyndy Mine near Porphyry type mineralization takes the form of disseminated ore minerals 2 Feb Three general types of ores occur at Bayan Obo disseminated banded and massive or Broad zoning of these ore types occurs in the Main

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Distribution of Platinum Group Elements in Chromite CHAPTER 10 ORE MINERAL ASSEMBLAGES OCCURRING IN

The chromitites occur in four distinct textural mod Massive disseminated banded and nodular chromitites are the most common textural types and commonly massive sulfides of sedimentary volcanic affiliation are treated in Section In the oxide facies two major variants occur a banded hematite/chert ore

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Disseminated ore Definition Resource/Mining Recognizing optimum Banded Iron Formation hosted gold

Ore carrying small particles of valuable minerals spread more or less uniformly through the gangue matter distinct from massive ore and means to identify fertile mineral systems PROCESSES to reduce exploration 1 Intrusion related and stockwork disseminated deposits Can Malartic

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