(PDF) Lithogeochemical halos and geochemical vectors to …
The giant stratiform Zn–Pb–Ag HYC deposit displays a broad Zn, Pb and Tl halo which extends laterally along the favourable pyritic black shale facies of the Barney Creek Formation for at least 15 km west of the deposit. A ferroan dolomite/ankerite ... it exhibits a similar inter-ore dolomitic siltstone and breccia contain be- distribution ...
Adsorption of Pb, Cd, Cu, Zn, and Ni to titanium dioxide
Purpose: Adsorption of metals (Pb, Cd, Cu, Ni, Zn) to TiO(2) nanoparticles and bulk particles was examined for use as a contaminant removal substrate as a function of particle size, sorbent concentration, and exhaustion. Methods: Adsorption experiments were conducted with 0.01, 0.1, and 0.5 g/L nanoparticles in a pH 8 solution and in spiked San …
A mineralogical and geochemical assessment of the As-, Cu-, In-, Pb
The SEP results of Fe, Cu, Pb, Zn, In, ... From these, only dolomite was detected as the rare (A2 and B4) to minor mineral (sediment), while calcite has probably been consumed in the waste rock of profile A due to its rapid rate reaction compared to dolomite (Pokrovsky et al., 2009). All of these acid producing and acid buffering …
Potential for leaching of heavy metals in open-burning bottom
Aqua regia extractable concentrations of Cd, Zn, Mn, Cu, Ni and Pb were significantly higher (p < 0.05) in fresh and old ashes than soil beneath landfill and uncontaminated soil (control). Increasing initial solution pH from 5 and 7 to 9 significantly reduced the mobility of Pb, Zn and Cu but not Cd whose mobility peaked at pH 7 and 9.
(PDF) Removal of Zn 2+, Fe 2+, Cu 2+, Pb 2+, Cd 2+, Ni 2
The selectivity range of metals for synthesized material can be presented as Ni < Co < Zn ˜ Fe ˜ Cu ˜ Cd ˜ Pb at low concentration (100 mg L−1 ) from both model aqueous solutions (Figs. 7 and 8). At higher metal concentrations, the selectivity range changes and can be shown in following form Zn < Fe < Cu < Ni < Cd < Pb < Co.
Diagenetic History and Timing of Cu and Zn-Pb Sulfide …
The highest-grade Cu and Zn-Pb sulfides (bornite, sphalerite, and galena) replace the calcite cement, with subordinate replacement of dolomite and detrital clasts. Quantitative mineralogical and geochemical data demonstrate that the highest base metal (Cu, Zn, and Pb) concentrations are associated with carbonate-rich samples, mostly as ...
Origin and evolution of hydrothermal fluids in the
The Marshoun epithermal Pb–Zn–Cu (Ag) deposit is located at 356,478 E, 4021102 N in the southeastern part of the THMB, approximately 50 km northwest of Qazvin (Fig. 1). Mining at Marshoun started around 1970 but after one decade of operation, the property owner stopped mining in the beginning of 1980 s. Recent exploration work at …
Genesis of the Assif El Mal Zn–Pb (Cu, Ag) vein deposit
The present study focuses on the Assif El Mal polymetallic Zn–Pb (Cu, Ag) veins located 100 km southwest of Marrakech on the northern flank of the High Atlas Range (Fig. 1 A). Discovered in the 1920s by French prospectors and mined underground between 1948 and 1960, the Assif El Mal deposit was operated by the Assif El Mal Mining Society …
The Origin of Carbonate Components in Carbonate Hosted …
It shows that the source of the Mg element in metallogenic fluid of Lekai Pb-Zn deposit may be sedimentary carbonate rock rather than mantle, chondrites, or …
Genesis of the Huangshaping W–Mo–Cu–Pb–Zn
The Huangshaping polymetallic deposit is located in southeastern Hunan Province, China. It is a world-class W–Mo–Pb–Zn–Cu skarn deposit in the Nanling Range Metallogenic Belt, with estimated reserves of 74.31 Mt of W–Mo ore at 0.28% WO 3 and 0.07% Mo, 22.43 Mt of Pb–Zn ore at 3.6% Pb and 8.00% Zn, and 20.35 Mt of Cu ore at …
Mechanism of germanium enrichment in the world-class Huize MVT Pb–Zn
The world-class Huize deposit hosts significant germanium (Ge) resources in the Sichuan–Yunan–Guizhou (SYG) Mississippi Valley-type (MVT) Pb–Zn province of China. The distribution and enrichment mechanism of Ge is still poorly understood. In the main ore-forming stage of Huize, we identified six sphalerite colors from C1 (black) to C6 …
Evaluation of the effectiveness of phosphate treatment for …
Analytical detection limits for Pb, Zn, Cd, and Cu were 0.3, 0.04, 0.01, and 0.04 mg L −1, respectively and analytical errors were estimated to be 3%. Water-soluble concentrations of Cd, Cu, Pb, and Zn were determined in untreated and phosphate-treated soil samples following the methodology reported by Cao et al. (2009) . 5 g of soil was ...
On diagenesis, dolomitisation and mineralisation in the Irish …
Marine calcite cementation and lithification of Carboniferous carbonate sediments hosting Zn-Pb mineralisation in the Irish orefield occurred at or near the …
Geology and C-O-S-Pb isotopes of the Fangyangshan Cu-Pb-Zn …
The Baoshan block is an important structural unit in the middle-southern segment of the Sanjiang Tethyan Metallogenic Domain (STMD; Fig. 1 a) in SW China (e.g., Hou et al., 2007, Li et al., 2010, Li et al., 2016c, Wang et al., 2015, Wang et al., 2016, Yang et al., 2017a).The subduction of the Tethyan oceanic plate generated abundant …
Removal of Cu, Zn, Pb, and Cr from Yangtze Estuary Using the
The highest BAF of each metal calculated was as follows: Cr (0.091 in winter) > Cu (0.054 in autumn) > Pb (0.016 in summer) > Zn (0.011 in summer). Highest root-rhizome TF values were recorded for four metals: 6.450 for Cu in autumn, 2.895 for Zn in summer, 7.031 for Pb in autumn, and 2.012 for Cr in autumn.
Insights into ore genesis of the Beishan Pb–Zn deposit in …
The reef-top dolomite is composed of dark gray to gray-black coarse crystalline dolomite and stromatoporoid dolomite and is the main host rock of Pb–Zn ore bodies (Shi et al., 1988). ... Fresh ore samples were crushed into 40–60 mesh, cleaned, and dried. ... A case study from the Tongshanling W-Sn-Cu-Pb-Zn ore field, Nanling …
Experimental study on fluid migration mechanism related to Pb–Zn …
In non-magmatic hydrothermal mineralisation, Pb and Zn are frequently enriched to form super-large non-magmatic, epigenetic, hydrothermal Pb–Zn deposits within carbonates (Ye et al., 2014), such as the Huize (Han et al., 2007a, Han et al., 2001, Han et al., 2004), Maoping (Han et al., 2007b) and other deposits in Pb–Zn-Cu-Au-Ag …
How carbonate dissolution facilitates sediment-hosted Zn-Pb …
Sodium-chloride brines with different pH and concentrations of Zn, Pb, Ba, Ca, and Mg were reacted with native sulfur with and without carbonate (calcite or dolomite) crystals at 200 °C (for solution composition, see Table S1 in the Supplemental Material 1).We chose native sulfur (S) because it disproportionates to H 2 S and SO 4 2– in …
(PDF) Lithogeochemical halos and geochemical vectors to …
Siderite within the inner halo contains considerably more Mn with MnO values of 0.4 to 4.0 wt%. It is suggested here that the basket of indices defined at Lady Loretta (Zn, Tl, …
(PDF) ASSESSMENT OF A SIMPLE EXTRACTION …
The potential to determine the gastric bioaccessibility (BA) of Tl, As, Pb(II), Cu(II), Zn(II) and Cd(II) using a simple extraction method was evaluated in selected samples from soils contaminated ...
Geochemical vectors for stratiform Zn-Pb-Ag sulfide and …
The Zinkgruvan Zn-Pb-Ag deposit is hosted by c. 1.9 Ga Paleoproterozoic supracrustal rocks belonging to the southern part of the Bergslagen lithotectonic unit (BLU) of the Fennoscandian shield (Stephens and Andersson, 2015; Fig. 1).The deposit is one of the largest and historically most economically significant stratiform Zn-Pb-Ag deposits in …
Geology and C-O-S-Pb isotopes of the Fangyangshan Cu-Pb …
Highlights. C-O isotope data indicate both granite and carbonate input for the Fangyangshan ore formation. S isotope data suggest that S was derived from a mixed …
Activated dolomite phosphate rock fertilizers to reduce …
Of the eight trace metals (Cu, Zn, Pb, Cd, Co, Cr, Mo, and Ni), only Zn was detected in leachate throughout all the leaching events for both soil types, and Cu was measured in all the leachate samples from Alfisol soils (Fig. 4). Concentrations of other metals in leachate samples were below the detection limits, especially after the fourth ...
Geochemical vectors for stratiform Zn-Pb-Ag sulfide and …
The favorable stratigraphic interval contains anomalously high Zn, Pb, Ag, Cu, K 2 O/(K 2 O + Na 2 O), Mn, Co, Tl, Ba and B relative to adjacent metatuffite. However, only Zn, Pb, Ag, K 2 O/(K 2 O + Na 2 O) and Mn are significantly enriched relative to adjacent strata beyond the known lateral extent of the ore. Elevated copper, Co and Tl only ...
Dolomite as a potential adsorbent in water treatment: …
Dolomite was shown eective for removing metal ions such as Mn 2+ 2+, Zn, Fe, Cu 2+, Pb, Cd, Ni 2+ and Co 2+ ions while also adding Ca 2+ and Mg2+ ions from and into aqueous solutions respectively (Aziz and Smith 1996; Dziubek and Kowal 1984; Ivanets et al. 2014). Dolomite is a sedimentary rock that falls under the sedimentary
Separation of sphalerite and dolomite using sodium
In the flotation of carbonate-hosted Pb-Zn ore, the separation of dolomite is critical to obtain high-quality zinc concentrate. In this study, fine-grained dolomite was …
Genesis of the Baiyangping Cu–Co and Pb–Zn …
The Oligocene to Miocene Baiyangping Cu–Co and Pb–Zn mineralization was deposited during the collision of the India and Asia continents. The mineralization is hosted in veins in faulted carbonate and clastic rocks, which act as fluid pathways. A detailed fluid-inclusion analysis and C–O–S isotopic study are reported, focusing on the …
Bioavailability of Pb, Zn, Cu, Cd, Ni and Cr in the sediments …
The Triassic rocks are composed of gypsum, dolomite, marls and breccias whereas the Post-Triassic outcrops are formed of limestone and marl. ... Sediments were sieved using a 63-μm nylon mesh to collect the finer fraction and oven-dried at 50 °C. ... Pb, Zn, Ni, Cu and Cr are essentially bound to residual fraction of the sediment (up to …
(PDF) Lithogeochemical halos and geochemical vectors to
A ferroan dolomite/ankerite halo overlaps with the Zn–Pb–Tl halo extending up to 250 m into the immediate stratigraphic hangingwall, and 50 to 100 m into the footwall sediments close to the deposit. ... R.R. Large, P.J. McGoldrick / Journal of Geochemical Exploration 63 (1998) 37–56 Fig. 9. Variation in Zn, Pb, Cu and FeO with ...
Generalised mathematical model to estimate Zn, Pb, Cd, Ni, Cu…
The sulphur ions present in the medium because of the dissolution of Fe and Mn monosulphides favour the precipitation of dissolved Ni, Zn, Cd, Pb and Cu ions as a consequence of displacement reactions (Eq. (8)). (8) M 2 + (aq) + FeS (s) ⇄ MS (s) + Fe 2 + (aq) where M=Ni, Zn, Pb, Cd or Cu. The effect of these displacement reactions is …