the emarat pb-zn mine is located at about 80 km south of the city of arak , iran. i the present mine-scale litho geochemical survey 56 hanging wall samples and 37 footwall samples were taken form exploratory tunnels, drillholes and open pit all samples were taken in the range of 0-40 m from pb-zn veins. the relationship between three variables including concentration of zn in wallwork, distance...

The thorium content of mine dust collected at various locations along the drift to the SNO site has been measured with several techniques-direct counting, proton induced x-ray emission, x-ray fluorescence, and neutron activation analysis. The thorium content varies significantly, from a minimum of 4 ppm to a maximum of 24 ppm (from direct counting measurements). The average Th content of the si...

Sediments in Lake Illawarra have been investigated by deep and shallow coring to provide a comprehensive appraisal of the sediment-bound natural (background) and more recent (i.e., industrial era) trace metal concentrations. The distribution of Cu, Pb and Zn in the upper 20 cm of sediment is directly related to the proportion of mud-dominated sediment forming the central floor of the lake. Trac...

Atomic absorption spectrometry facilitates the reliable determination of mineral content during pharmaceutical quality control medicinal plants. In present work, measurable amounts Fe, Ca, Cu, K, Mg, Mn, Na and Zn were detected in leaves flowers Hypericum origanifolium Willd. through atomic spectrometry. Mean heavy metal H. was, descending order, Ca > Mg K Fe. was higher concentrations (11157.2...

Cadmium is an established toxic metal with its ability to accumulate in blood, liver and kidney. Cadmium is chemically related to zinc and found wherever zinc occurs in nature. It is emitted to air and water by mines, metal foundries and industries using Cadmium in alkaline accumulators, alloys, paints and plastics. Cadmium is known to alter the tissue distribution of the essential trace metals...

Pair-fed rats were given diets containing 250 ppm added Cu with or without 5% Senecio jacobaea (S J), a poisonous plant containing the highly toxic pyrrolizidine alkaloids (PA). Levels of Cu, Zn and Fe were determined in whole liver, kidney, spleen, serum and subcellular fractions of liver. Serum ceruloplasmin and hematocrit values were also obtained. At 5 wk, a 7.5-fold increase in liver Cu wa...

A laser-based magnet measurement system has been developed to measure the magnetostrictive strain of large cylindrical samples. The measurement system incorporates a solenoid capable of generating a maximum magnetic field intensity of 3000 Oe and a laser displacement sensor. For calibration and evaluation purposes, the positive magnetostrictions of two different types of giant magnetostrictive ...

Trace element compositions of sphalerite and chalcopyrite have been investigated for four arc-hosted Cretaceous VMS deposits (María Teresa, Perubar, Palma in Peru, Cerro de Maimón the Dominican Republic) using laser ablation inductively-coupled plasma mass spectrometry. In sphalerite, Fe, Mn, Cd, Hg, Ag, Sb, Se, In, Ge, Ga are lattice-bound, whereas Sn, Tl, Bi, Pb occur at least partly as miner...

27 Here we explore enrichments in paleomarine Zn as recorded by authigenic iron oxides 28 including Precambrian iron formations, ironstones and Phanerozoic hydrothermal 29 exhalites. This compilation of new and literature-based iron formation analyses track 30 dissolved Zn abundances and constrain the magnitude of the marine reservoir over 31 geological time. Overall, the iron formation record ...

In order to study the effect of foliar applications of micronutrients on yield, extraction oil production and chemical composition of pot marigold (Calendula officinalis), two experiments were conducted in the randomized complete block design with three replications in Shahrekord, Iran during two growing seasons 2014 and 2015. The objectives of this study were to determine the effects of foliar...