نتایج جستجو برای: pb zn mineralization

تعداد نتایج: 80855  

Bonyadi, , Forouzesh, ,

Angouran zinc and lead deposit is located about 135 km west of Zanjan city, in the northwest of the Sanandaj-Sirjan structural zone The results of this study indicate that the dolomitic alteration occurred in the carbonate hanging-wall and the presence of ankerite in the schist footwall. The main host of ore deposit is metamorphic carbonate. The Angouran dolomite is secondary and hydrothermal. ...

اسداللهی, پویه, خلیلی, محمود , مکی زاده, محمد علی ,

The conglomerates of Sangestan Formation (Lower Cretaceous) have been metamorphosed in the vicinity of the leucogranitoid rocks of the Shir-Kuh batholith and have created the mineral assemblage of garnetepidote- quartz-calcite-pyrite in the contact halo. Following the contact metamorphism, hydrothermal alteration (pyrite formation and silicification) has likely occurred. Based on the trace...

Journal: :Resource Geology 2021

The Hera Au–Pb–Zn–Ag deposit in the southeastern Cobar Basin of central New South Wales preserves calc-silicate veins and remnant sandstone/carbonate-hosted skarn within a reduced anchizonal Siluro-Devonian turbidite sequence. orebody distribution is controlled by long-lived, basin margin fault system, that has intersected sedimentary horizon dominated siliciclastic turbidite, with lesser grits...

2015
Natalia Lanocha-Arendarczyk Danuta Izabela Kosik-Bogacka Adam Prokopowicz Elzbieta Kalisinska Sebastian Sokolowski Maciej Karaczun Pawel Zietek Joanna Podlasińska Bogumila Pilarczyk Agnieszka Tomza-Marciniak Irena Baranowska-Bosiacka Izabela Gutowska Krzysztof Safranow Dariusz Chlubek

The aim of this study was to evaluate the aforementioned chemical elements in tibial plateau samples obtained during knee arthroplasty. The gender-specific analysis of chemical element levels in the bone samples revealed that there were statistically significant differences in the concentration of Pb and Se/Pb ratio. The contents of elements in the tibial plateau in the patients with osteoarthr...

2014
Junzeng Xu Qi Wei Yanmei Yu Shizhang Peng Shihong Yang

To reveal the impact of irrigation management on the release and leaching of soil metals (Cu, Zn, Pb, Cr, and Cd), deep percolation rate and metals contents in soil solutions were observed in rice fields with nonflooding controlled irrigation (NFI) and flooding irrigation (FI) treatments. The contents of Cu and Cr in the deep solutions were safe according to the environmental quality standard f...

Journal: :Environmental pollution 1994
R Laskowski M Maryański M Niklińska

Two hypotheses were tested: (1) heavy metals such as Zn, Pb and Cd can suppress the respiration rate of forest litter at low-moderate pollution levels, and (2) mineral nutrients such as K, Ca and Mg can counteract the toxicity of heavy metals when applied onto the polluted litter. In a completely randomised design, three doses of heavy metals were used: Cd-10, 50, 250; Pb-100, 500, 2500; Zn-200...

Journal: :Journal of integrative plant biology 2008
Dong-Mei Deng Jin-Chuan Deng Jin-Tian Li Jun Zhang Min Hu Zhou Lin Bin Liao

Sedum alfredii Hance is a newly reported zinc (Zn) and cadmium (Cd) hyperaccumulator native to China. In this study, four populations of S. alfredii were collected from Yejiwei (YJW), Jinchuantang (JCT) and Qiaokou (QK) lead (Pb)/Zn mines located in Hunan Province as well as Quzhou (QZ) Pb/Zn mine located in Zhejiang Province for exploring the intraspecies difference of this plant in metal accu...

2015
Zhangwei Li Weibo Zhu Xiaoyun Guo

Remediating soils with heavy metals contamination is a significant challenge. This study investigated the co-remediation effect when paired soil amendment mixtures were used to treat soil contaminated by Pb, Cd, and Zn. The three mixed amendments are: 1) micro particle hydroxyapatite (mHAP) and humic acid 2) nano particle hydroxyapatite (nHAP) and humic acid 3) sepiolite and humic acid. Co-reme...

2014
Bo Gao Jin Lu Hong Hao Shuhua Yin Xiao Yu Qiwen Wang Ke Sun

To investigate the characteristics and potential sources of heavy metals pollution, surface sediments collected from Bohai Bay, North China, were analyzed for the selected metals (Cd, Cr, Cu, Ni, Pb, and Zn). The Geoaccumulation Index was used to assess the level of heavy metal pollution. Pb isotopic compositions in sediments were also measured to effectively identify the potential Pb sources. ...

2015
Naz Alia Khan Sardar Muhammad Said Khalid Salma Alam Sadia Siddique Sadaf Ahmed Toqeer Scholz Miklas Paul B. Tchounwou

The impact of heavy metal toxicity on the shoot and root lengths, total protein, fiber characteristics, moisture content and nutrient composition of spinach (Spinacia oleracea) was evaluated. Plants were grown in pots containing soil and treated with different concentrations (mg/kg) of lead (Pb; 300, 400 and 500), cadmium (Cd; 0.5, 1 and 1.5) and zinc (Zn; 250, 500, and 700) as well as mixtures...

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