نتایج جستجو برای: geochemical indices

تعداد نتایج: 94781  

ژورنال: بوم شناسی آبزیان 2022
Amrollahi Biuki, Narges, Safaie, Mohsen, Soleimanirad, Asieh, Taherizadeh, Mohammad Reza,

Sediment samples were collected from 8 sites in the northern areas of Qeshm Island, Iran to determine the total and partial concentrations of heavy metals including copper (Cu), lead (Pb), nickel (Ni), cadmium (Cd), and Iron (Fe), in February 2016. A combination of nitric acid and perchloric acid was used to determine the total concentrations and sequential extraction method was used to analyze...

Journal: :Dalton transactions 2007
R J P Williams

A novel approach to the evolution of organisms is given. It asserts that biological evolution was consequential upon geochemical, environment, change and was inevitable not accidental.

Journal: :geopersia 2014
hossein shahi reza ghavami abolghasem kamkar rouhani hoshang asadi haroni

the analysis of geochemical data in frequency domain, as indicated in this research study, can provide new exploratory informationthat may not be exposed in spatial domain. to identify deep geochemical anomalies, sulfide zone and geochemical noises in dalli cu–au porphyry deposit, a new approach based on coupling fourier transform (ft) and principal component analysis (pca) has beenused. the re...

Journal: Geopersia 2016

Iranian Cenozoic magmatic belt, known as Urumieh-Dokhtar, is recognized as an important polymetallic mineralization which hosts porphyry, epithermal, and polymetallic skarn deposits. In this regard, multivariate analyses are generally used to extract significant anomalous geochemical signature of the mineral deposits. In this study, stepwise factor analysis, cluster analysis, and concentration–...

Journal: :Minerals 2022

At present, the challenge for geochemical prospecting of deep-sea, rare, earth-rich sediments is selection exploration sites. Because unpredictability offshore operations, distribution and survey line stations face great challenges. In this paper, we study fact that concentration geochemistry in space may be a part special complex process, which called multifractal. It requires large number ind...

Journal: :Applied sciences 2021

The aim of this study was to provide, for the first time, data on concentration potentially toxic elements (PTEs) in soils and bulbs elephant garlic (Allium ampeloprasum L.) cultivated Valdichiana, a traditional agricultural area Tuscany, Italy. Bulbs soil samples were collected four cultivation fields analyzed by inductively coupled plasma-mass spectrometry (ICP-MS) determine concentrations As...

Journal: :Indonesian Journal of Social and Environmental Issues 2023

The consumption of heavy metals through the ingestion food is a growing concern in developing countries where monitoring environmental content has not been given desired attention. This research work aims at determining public health risks and safety farm products terms their residual metal burdens from five subsistence farmlands Akinyele area. Analysis concentrations Cd, Cu, Cr, Pb, Fe, Zn soi...

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