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Comparative Study of Gacun and Youre Silver–Lead–Zinc–Copper Deposits in Sichuan, SW China, and their Mineralization Significance
ore-bearing horizon structure of ore-bearing belt VMS deposit Gacun–Youre ore district
2018/4/10
The large Gacun silver–lead–zinc–copper deposit in Sichuan Province is one of the largest volcanogenic massive sulfide (VMS) deposits in China. The deposit consists of western and central ore bodies, ...
Uranium and lead adsorption onto bentonite and zeolite modified with polyacrylamidoxime
Adsorption Polyacrylonitrile Composite Aluminosilicate Uranium Lead
2011/11/10
Polyacrylonitrile (PAN) and bentonite (B)/zeolite (Z)-PAN composites were prepared by direct polymerization of acrylonitrile (AN) and AN adsorbed onto B and Z. PAN and the composites were subjected to...
New supplemental activator for lead isotope analysis using TIMS
Pb isotope activator TIMS colloidal silica germanium
2017/4/12
We have devised a new supplementary activator for lead isotope measurements performed using thermal ionization
mass spectrometry (TIMS). The activator consisted of a mixture of 250 ppm Ge and 500 ppm...
Thermoanalytical studies of silver and lead jarosites and their solid solutions
Jarosite Thermal analysis Controlled rate thermal analysis Thermogravimetry
2011/11/11
Dynamic and controlled rate thermal analysis has been used to characterise synthesised jarosites of formula [M(Fe)3(SO4)2(OH)6] where M is Pb, Ag or Pb–Ag mixtures. Thermal decomposition occurs in a s...
Sulfur and Lead Isotope Investigations of the Carbonate-Hosted Pb-Zn Deposits in the Yahyalı Region, Kayseri, Southern Turkey
sulfur isotopes lead isotopes carbonate-hosted Pb-Zn deposits Turkey
2009/7/7
Carbonate-hosted Pb-Zn deposits are common in the Yahyalı region (Taurus Belt) with galena the most abundant sulfide mineral. The mean d34S values for Göynük, Celaldağı Desandre, ...
Lead and Sulfur Isotope Studies of the Koru (Çanakkale, Turkey) Lead-Zinc Deposits
Koru Ç anakkale lead zinc sulfur isotope
2009/7/7
Koru (Çanakkale) barite-bearing lead-zinc deposits are typical examples of the lead-zinc deposits occurring in the Tertiary volcanic rocks which crop out in the Biga Peninsula. Volcanic rocks a...
Copper, zinc and lead impact in SW Iberian shelf sediments: An assessment of recent historical changes in Guadiana river basin
SW Iberian Continental Shelf sediment core mining exploitation geochronology heavy metal enrichment factor
2017/8/10
n the present study, lithogenic/biogenic and anthropogenic elements were determined in five sediment cores collected at the SW Iberian Continental Shelf in order to investigate the spatial and tempora...
Kinetic and isothermal studies of lead ion adsorption onto palygorskite clay
Lead Palygorskite clay Adsorption capacity Kinetic Isotherm
2011/11/7
The use of a natural palygorskite clay for the removal of Pb(II) from aqueous solutions for different contact times, pHs of suspension, and
amounts and particle sizes of palygorskite clay were invest...
XAFS determination of the chemical form of lead in smelter-contaminated soils and mine tailings: Importance of adsorption processes
smelter-contaminated soils mine tailings adsorption processes oxyhydr
2012/3/31
Weinvestigatedsmelter-contaminatedsoilsfromEvin-Malmaison,Nord-Pas-de-Calais,
France,andminetailingsfromLeadville,Colorado,U.S.A.BulkPbconcentrationsrange
from460to1900ppminthetopsoilsatEvin-Malmais...
High temperature in situ structural investigation on lead feldspar
High-temperature increase
2012/3/30
Single-crystalX-raydiffractionwasperformedinsituat T 20,230,465,and700C
Si O , I2/c,a 8.402, b 13.043, c 14.308
onapartiallyorderedleadfeldspar(PbAl2 2 8351??
A, 115.30, V 1417.6A ; Q 0.71).Theunit...
Structural variations induced by thermal treatment in lead feldspar (PbAl2Si2O8)
Structural variations thermal treatment lead feldspar
2012/3/30
Lead feldspar single crystals were annealed at T 5 1050 and 1000 8 C, starting from a disordered metastable configuration (PbFH, Qod5 0) and from an ordered configura-tion (PbFL, Qod5 0.89). Single-cr...
Morphology of Lead(II) and Chromium(III) Reaction Products on Phyllosilicate Surfaces as Determined by Atomic Force Microscopy
Atomic Force Microscopy Clay FTIR Geochemical Equilibrium Model Mica Remediation Smectite X-ray
2011/12/27
Abstract: Redox and acid-base reactions play important roles in the fate of metal contaminants in soils and sediments. The presence of significant amounts of Cr, Pb and other toxic heavy metals in con...
Cation ordering in lead-molybdenum-vanadium oxychlorides
Cation lead-molybdenum-vanadium oxychlorides
2012/4/9
The crystal chemistry and structure ofthe layered lead oxychloride parkinsonite, ideally Pb7Mo09C12, have been reevaluated in the light of TEM observations of natural and syn-thetic samples and the st...
The structure of ordered and disordered lead feldspar (PbAl2Si2O8)
The structure lead feldspar (PbAl2Si2O8)
2012/4/9
The Al-Si configuration in ordered and disordered lead feldspar (PbA12Si20g) has been investigated by single-crystal X-ray diffraction, Single crystals synthesized from meltand cooled from T= 1280to 1...
Lead-210 Derived Sedimentation Rates from a North Louisiana Paper-Mill Effluent Reservoir
Anatase Applied sedimentation Kaolin Lead-210 Paper-mill effluent Pyrite Wetland degradation
2011/12/28
Lower Wham Brake is a cypress, rim-swamp artificially enclosed in 1950 as a 22 km2 industrial reservoir by the International Paper Company (IPC)-Bastrop Mill, for regulating downstream water quality. ...