The present study employed mineral-water partitioning theory to try to predict Zn and Pb concentrations in MVT ore fluids in the Illinois-Kentucky and Central Tennessee …
In addition, the Fe/Zn mass ratios (0.025-0.075) of sphalerite estimate the fluid temperature for substage II-1 of 246-284°C, whereas the Ag/(Ag + Cu) and Zn/(Zn + Fe) mole ratios of freibergite ...
The South China Block hosts a great number of porphyry Cu-Mo, epithermal Au-Ag, hydrothermal vein-type Ag-Pb-Zn, skarn Cu-Pb-Zn, and granite-related U deposits (Mao et al., 2013, Li and Jiang, 2017, Zhong et al., 2017).Previous studies suggest that the formation of these deposits is related to late Mesozoic large-scale tectono-magmatic and hydrothermal events …
The Fule Pb Zn deposit, hosted by carbonate rocks of the middle Permian Yangxin Formation (Si et al., 2006), is stratigraphically and spatially (~ 1 m) close to the late Permian Emeishan basalts (Figs. 1 b, Fig. 2, Fig. 3).This deposit contains very high ore grades (up to 60 wt% Zn + Pb, mean 15–20 wt%) and is rich in multiple elements (4567 t Cd, 329 t Ge, and …
Pyrite in the form of framboids is one of the most common sulfides in many sediment-hosted ore deposits, especially in shale-hosted massive sulfide (SHMS) or clastic-dominated Zn-Pb (e.g., HYC and ...
The main deposits of Zn-Pb ores were located in the diapiric zone: Fej Lahdoum (81.000 ton Pb and 150.000 ton Zn ores extracted) and Lakhouat (until February 2004, 140 tons of PbS and 350 tons of ZnS per month were extracted) (Office National des Mines, 2010, Babbou-Abdelmalek et al., 2011).Both mines have a well established infrastructure and have been …
The newly discovered Panjiaduan Cu–Pb–Zn deposit (9.3 Mt; at 1.36% Cu, 2.90% Pb, 3.80% Zn and 38.12 g/t Ag), located in the SE segment of the SGXR, is primarily hosted in fracture zones in ...
The most direct attempts to determine the concentrations of Zn and Pb in MVT ore fluids have come from studies of fluid inclusions. Czamanske et al. (1963) and Pinckney and Haffty (1970) used neutron activation and atomic absorption to analyze bulk leachates of fluorite-hosted fluid inclusions from the Illinois-Kentucky district (Fig. 1 A) and reported Zn …
separation of minor metal impurities from the tin solution was in the order of Pb > Cu > Bi > Zn > Sb > As above 5.5mol/L HCl. 0 0 20 40 60 80 100 Extraction(%) HCl, mol /L Pb As Bi Sb Sn Cu Zn 2 4 6 8 10 Fig. 1 Effect of HCl concentration on extraction of metals. 0 0 100 200 300 400 500 β HCl, mol /L β Sn/Pb β Sn/As β Sn/Bi β Sn/Sb β Sn ...
Zhou et al. considered the mineralization in the Huize Zn-Pb ore field is related to the closure of the paleo-Tethys ocean, so they supported an Eocene age. We report here on the first Sm-Nd dating of the Huize Zn-Pb ore deposits, using samples of hydrothermal calcite from the Huize ore field in southwest China. 2. Geology
Prediction of ore fluid metal concentrations from solid solution concentrations in ore-stage calcite: Application to the Illinois-Kentucky and Central Tennessee Mississippi Valley-type districts
The superlarge Luziyuan Zn-Pb-Fe(-Cu) polymetallic deposit is located in the southern Baoshan Block of western Yunnan (SW China). The deposit contains over 4.2 million tonnes (Mt) of contained Zn + Pb metal reserves at 5.09% Zn and 2.40% Pb, and 301 Mt of Fe ore resources at 30.02% TFe.
Petrography suggests that sphalerite, galena and chalcopyrite co-crystallised, consistently enveloping and/or replacing pre-mineralisation silica-dolomite, siderite, calcite, …
Ore reserves are around 0.5 Mt and grades are 3.21% Zn, 0.58% Pb, 0.86% Cu with 83.31 ppm Ag and 0.41 ppm Au. Sulphide mineralizations occur as a local replacement of carbonate bars rocks.
Quartz is present in large quantities throughout the paragenetic sequence as well as in a post-ore stage. Calcite is present in ore stage and post-ore mineralization. This temporal …
The LA–ICP–MS data show that the chalcopyrite in the Meiling Cu ore is obviously enriched in Zn, Se, Cd, Bi, Pb, As, In and Ag and depleted in Co, Ni, Ga, Sb and Mn. ... experiments studies in the Cu–Fe–Zn–S system have revealed that concentrations up to 2000 μg/g probably reflect Zn in solid solution (substituted for Fe), but ...
This paper presents the rare earth element (REE) and C-O isotopic compositions of calcites in the Huize Pb-Zn deposits. From lumpy to patch to vein calcites, REE contents …
Calcite is a common gangue mineral in hydrothermal deposit especially for the carbonate-hosted Pb–Zn deposit and incorporates Fe, Mn, Mg and trace amounts of REE because of the institution between Ca 2+ and REE 3+, the fractionation of REE can be mainly caused by several ways such as redox condition change, temperature variation and the …
In this research, flotation of copper, lead and zinc minerals from a copper oxide–sulfide ore was studied. The identification tests showed that the sample is a mixture of quartz, chalcopyrite ...
The Pusangguo skarn deposit is located in the Gangdese porphyry copper belt, southern Tibet, and has reserves of 113,992.0 t Cu, 79,867.7 t Pb, 144,399.5 t Zn, and 285.8 t Co with average grades of 1.42 wt% Cu, 1.01 wt% Pb, 1.82 wt% Zn, and 140 g/t Co (Li et al., 2018a, Li et al., 2018b) (Fig. 1 b).The major lithostratigraphic unit is the Lower Cretaceous Takena …
Abstract The Huize Zn-Pb- (Ag-Ge) district is a typical representative of the well-known medium-to large-sized carbonate-hosted Zn-Pb- (Ag-Ge) deposits, occurring in the Sichuan-Yunnan-Guizhou Pb-Zn Ore-forming Zone. Generally, fluid inclusions within calcite, one of the major gangue minerals, are dominated by two kinds of small (1–10 μm) inclusions …
Most metals(e.g., Zn, Pb, Ag, Cu, Fe) in skarn and associated ore bodies, interpreted to be predominantly magmatic-sourced, show co-occurring enrichment or depletion relative to the metalimestone ...
The Huize Zn–Pb ore district has a proven Zn–Pb metal reserve of approximately 7 million tons, with an average grade of 25 wt% to 35 wt% Zn + Pb (Han et al., ... (−2.13 ± 0.24 ‰) between inorganic calcite and solution reported by Saulnier et al. (2012). 4.6. In situ U–Pb dating of the pre-ore D3o dolostone and DC ...
The Au–Cu porphyry and Au–Ag–Pb–Zn–Cu carbonate replacement ore deposits are situated in the Kerdyllon unit, ... dolomite, calcite and minor muscovite, gypsum and pyrite. Galena, ... This one-step beneficiation process involves the use of strongly alkaline sodium sulfide solutions to leach antimony. However, since galena is not ...
We propose that carbonate-buffered fluid mixing is a critical process for forming post-sedimentary Zn ± Pb ± Ba deposits in sedimentary carbonate rocks.
Six sulphide-free samples of calcite from the Avecilla Mine were handpicked and completely dissolved in 7 M HNO 3.After dissolution, the solutions were spiked with a 205 Pb– 233 U– 236 U tracer. U–Pb separation was performed on 250 μl Teflon columns with the anion exchange AG1×8 resin.Uranium was concentrated by iron co-precipitation and converted to its …
Relatively high Pb/Zn concentrations (3.5 & 3 wt. %) were analzyed in calcite veins with cyclical growth zonations above the main ore body at Khusib Springs, suggesting a …
Abstract: Intimate knowledge of the mineralogical assembly of the Yushui complex ore rich in Cu, Pb, and Ag is essential if efficient separation processing is to be conducted.
However, the ore-forming mechanisms of the Maoping Pb–Zn deposit remain contentious; for example, (1) sulfate reduction mode: the reduced sulfur required for Pb-Zn mineralization was derived from the TSR between sulfate ions in the ore-bearing basin brine and organic matter within the strata, which then combined with metal ions to precipitate ...