نتایج جستجو برای: geochemical indices

تعداد نتایج: 94781  

2014
Yuanyuan Li Hongyu Wen Longqian Chen Tingting Yin

The growing concern about the effectiveness of reclamation strategies has motivated the evaluation of soil properties following reclamation. Recovery of belowground microbial community is important for reclamation success, however, the response of soil bacterial communities to reclamation has not been well understood. In this study, PCR-based 454 pyrosequencing was applied to compare bacterial ...

2000
Francesco Bella Wolfango Plastino

Geophysical and geochemical investigations concerning deformation events of tectonic interest at the underground laboratory of Gran Sasso have been carried out and possible correlations with local seismicity are also investigated. We have planned and realized an automatic multiparametric equipment (water temperature, electrical conductivity, pH, Rn) and from the May 1996 we performs automatic m...

2013
B. K. Gogoi R. K. Sarmah

This paper aims to study the geochemical characteristics of shale of Disang group of Eocene age. Geochemical study and the data reported indicate that Shales are deposited under the marine condition. Tectonic setting was active continental margin to passive continental margin and sediments were derived from volcanic and/or granitic source area. Study reveals that Source-rating of studied shale ...

2017
Patrice de Caritat Clemens Reimann

This comment highlights a whole series of datasets on thallium concentrations in the environment that were overlooked in the recent review by Karbowska, Environmental Monitoring and Assessment, 188, 640, 2016 in this journal. Geochemical surveys carried out over the last few decades all over the world at various scales and using different sampling media have reported the concentration of thalli...

2015
William C. Burnett

One of the persistent uncertainties in establishing marine geochemical mass balances is evaluating the influence of submarine groundwater discharge (SGD) into the ocean. Our long-term goal is to develop geochemical tools (e.g., radon and radium isotopes) to quantify the magnitude of SGD on a local to regional scale. Improvements in field-based analytical devises is also sought in order to allow...

2008
C. K. Shearer P. V. Burger

The recently recovered Antarctic achondrites Graves Nunatak 06128 and 06129 are unique meteorites that represent high-temperature asteroidal processes in the early solar system never before identified in any other meteorite. They represent products of early planetesimal melting (4564.25 ± 0.21 Ma) and subsequent metamorphism of an unsampled geochemical reservoir from an asteroid that has charac...

Journal: :Quaternary 2021

The loess-paleosol profile near the settlement of Pécel has a notable size among sequences Northern Carpathian territories. Therefore, comprehensive sedimentological examinations were performed to understand and information preserved in it. past periodicity intensity winds showed by particle composition studies (GSI, U-ratio). At least two source areas can be presumed based on geochemical indic...

1983
D C Washington Robert J Wright Philip S Justus

A preliminary draft of an NRC site technical position on geochemical issues at RHO/BWIP was transmitted to you on 19 January 1984. A preliminary draft STP on seismotectonic issues was given to you last week. This satisfies our commitment for input into OPS Plan Commitment 5314215. We consider that both of these documents represent the basis for the geological stability and geochemical issues th...

Journal: Geopersia 2014

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: :Arabian Journal of Geosciences 2022

The paleoweathering, provenance, and tectonic setting of the source region were determined with compositional geochemical analyses sediments obtained from beach locations Yoyo, Mouanko, Mbiako along central coast Cameroon. are medium to coarse-grained brown light brown. Their mineralogy is dominated by quartz clay minerals a amount feldspars, rutile, goethite, hematite, calcite. Moreover, their...

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