SULFIDE ORE MINERALIZATION OF THE URANIUM-MOLYBDENUM-RHENIUM BRIKETNO-ZHELTUKHINSKOE DEPOSIT (MOSCOW BASIN)

The purpose of these studies is to study the forms of finding copper-porphyry ores of the Yoshlik I deposit compared with the Kalmakyr deposit data and to decide on the choice of a cost-effective ore processing technology. As a result of the studies, it was revealed that ore mineralization is represented by sulfides of various metals and iron oxides. The primary sulfides are pyrite and chalcopyrite. In the «Yoshlik-I» sample, the pyrite content is six times less than in the Kalmakyr sample and is 0.7%. The mass fraction of chalcopyrite in the Kalmakyr and “Yoshlik-I” deposits is 1.1 and 0.8%, respectively. The remaining sulfides of various metals and the minerals of these ribs are present in several single signs. According to the content of cell fids, the Kalmakyr ore sample is characterized by a small-sulfide ore; the «Yoshlik-I» ore sample is a slab-sulfide type ore. According to the oxidation state calculated by iron, ore samples of the Kalmakyr and «Yoshlik-I» deposits belong to the mixed variety of ores.

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ORE MINERALS FROM KUROKO TYPE DEPOSIT OF TOYA-TAKARADA MINE, HOKKAIDO, JAPAN

Buletin Sumber Daya Geologi ◽

10.47599/bsdg.v11i2.14 ◽

2016 ◽

Vol 11 (2) ◽

pp. 103-115

Author(s):

Euis Tintin Yuningsih, ST., MT., Ph.D

Keyword(s):

Middle Miocene ◽

Silver Content ◽

Quantitative Chemical Analysis ◽

Sulfur Fugacity ◽

Fine Grained ◽

Sulfide Ore ◽

Ore Minerals ◽

Ore Mineralization ◽

Small Grains ◽

Homogenization Temperatures

Toya-Takarada mine is Au- and Ag-rich Kuroko-type deposit located in Takarada, Toya-mura, southwest Hokkaido, Japan. The deposits were hosted in rhyolitic tuff and mudstone of Middle Miocene age. Ore samples of fine-grained black ore, vuggy black-yellow ore, granular vuggy black ore, quartz-sulfide ore and massive quartz-barite ore were studied to identify the ore minerals association in the Toya-Takarada mine. The ore minerals are dominated by sphalerite, galena, chalcopyrite and pyrite with fewer amounts of electrum, tetrahedrite-tennantite, and other sulfosalt minerals with secondary mineral of covellite.The quantitative chemical analysis of ore minerals by EPMA indicated that FeS contents in sphalerite is low (0.3-1.2 mol.%) in all kinds of ore samples. Small grains of electrum as inclusions in pyrite are identified in vuggy black-yellow ore with Ag content around 32-33 atm %.In general, the silver minerals in Kuroko-type deposits occurred mainly in the black and yellow ores zone dominantly composed of sphalerite, galena, pyrite, chalcopyrite and barite as a form of electrum and/or argentian tetrahedrite-tennantite series. Thus, the massive quartz-barite ore sample of Toya-Takarada mine are also contain some rare silver sulfosalt minerals such as proustite, Cu-rich pearceite, geocronite-jordanite and fizelyite. Those minerals were found together in association with sphalerite. It seems that sphalerite was crystallized first followed by proustite and Cu-rich pearceite, then geocronite-jordanite and fizelyite are crystallized later.Sphalerites from quartz-sulfide ore of Toya-Takarada contain some fluid inclusions and measured homogenization temperatures are in the range of 164-247°C (av. 208°C) with salinity ranging from 1.9 to 4.7 wt.% NaClequiv. (av. 3.9 wt.% NaClequiv.). The mineral assemblage, iron content in sphalerite and silver content in electrum were indicated that sulfur fugacity was slightly higher during ore mineralization in Toya-Takarada mine.

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TIMING AND RELATIONS OF MAGNETITE AND COPPER ORE MINERALIZATION IN IOCG AND MTAP DEPOSITS: COASTAL CORDILLERA, COPIAPO REGION CHILE,

10.1130/abs/2017am-303175 ◽

2017 ◽

Author(s):

Stephen DelGaudio ◽

◽

John M. Hanchar ◽

Fernando Tornos

Keyword(s):

Copper Ore ◽

Coastal Cordillera ◽

Ore Mineralization

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DETACHMENT, ORE MINERALIZATION, AND PROGRESSIVE UPLIFT OF THE MARCY MASSIF DURING THE GRENVILLE OROGENIC CYCLE, ADIRONDACK MOUNTAINS, NY

10.1130/abs/2018ne-311110 ◽

2018 ◽

Cited By ~ 1

Author(s):

Sean P. Regan ◽

◽

Meghan E. Toft ◽

Gregory J. Walsh ◽

M.L. Williams ◽

...

Keyword(s):

Adirondack Mountains ◽

Ore Mineralization ◽

Orogenic Cycle

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Reduction of Mineral Overgrinding in Sulfide Ore Dressing Technology

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/666/3/032099 ◽

2021 ◽

Vol 666 (3) ◽

pp. 032099

Author(s):

T I Intogarova ◽

O S Valieva ◽

Y P Morozov

Keyword(s):

Sulfide Ore ◽

Ore Dressing

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Timing of fluorite mineralization and exhumation events in the east Central Alborz Mountains, northern Iran: constraints from fluorite (U–Th)/He thermochronometry

Geological Magazine ◽

10.1017/s0016756821000169 ◽

2021 ◽

pp. 1-17

Author(s):

Behnam Shafiei Bafti ◽

István Dunkl ◽

Saeed Madanipour

Keyword(s):

Thermal Relaxation ◽

Geothermal Gradient ◽

Source Rocks ◽

Lower Amount ◽

Mining District ◽

Northern Iran ◽

East Central ◽

Central Alborz ◽

Ore Mineralization ◽

History Of

Abstract The recently developed fluorite (U–Th)/He thermochronology (FHe) technique was applied to date fluorite mineralization and elucidate the exhumation history of the Mazandaran Fluorspar Mining District (MFMD) located in the east Central Alborz Mountains, Iran. A total of 32 fluorite single-crystal samples from four Middle Triassic carbonate-hosted fluorite deposits were dated. The presented FHe ages range between c. 85 Ma (age of fluorite mineralization) and c. 20 Ma (erosional cooling during the exhumation of the Alborz Mountains). The Late Cretaceous FHe ages (i.e. 84.5 ± 3.6, 78.8 ± 4.4 and 72.3 ± 3.5 Ma) are interpreted as the age of mineralization and confirm an epigenetic origin for ore mineralization in the MFMD, likely a result of prolonged hydrothermal circulation of basinal brines through potential source rocks. Most FHe ages scatter around the Eocene Epoch (55.4 ± 3.9 to 33.1 ± 1.7 Ma), recording an important cooling event after heating by regional magmatism in an extensional tectonic regime. Cooling of the heated fluorites, as a result of thermal relaxation in response to geothermal gradient re-equilibration after the end of magmatism, or exhumation cooling during extensional tectonics characterized by lower amount of erosion are most probably the causes of the recorded Eocene FHe cooling ages. Oligocene–Miocene FHe ages (i.e. 27.6 ± 1.4 to 19.5 ± 1.1 Ma) are related to the accelerated uplift of the whole Alborz Mountains, possibly as a result of the initial collision between the Afro-Arabian and Eurasian plates further to the south.

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