Showing papers in "Applied Geochemistry in 2021"

TL;DR: Laser-induced breakdown spectroscopy (LIBS) is a simple, straightforward, and versatile form of atomic emission spectrography that focuses a rapidly-pulsed laser beam onto a sample to form a plasma containing its constituent elements and then uses spectral analysis of the emitted light to detect the elements present as mentioned in this paper.

TL;DR: A review of the state-of-the-art methods for processing geochemical exploration data and for identifying geochemical anomalies associated with mineralization can be found in this article, where the authors use logratio transformation to open the closure problem.

TL;DR: Wang et al. as discussed by the authors used a pixel-pair feature (PPF) method and a deep convolutional neural network (CNN) to identify the multivariate geochemical anomalies associated with mineralization.

TL;DR: In this article, a GANomaly network was used to detect geochemical anomalies related to mineralization in the southern part of Jiangxi Province and its adjacent areas in China, where the training data used in this study belong to a typical rare-sample category of imbalanced data samples; thus, during the training phase, only non-mineralized dataset randomly selected from the study area was used for training to avoid the overfitting problem caused by an imbalance between positive and negative training samples.

TL;DR: In this article, mineralogic and geochemical studies were performed in the Tecolutla and Coatzacoalcos beach sediments, located at the SW Gulf of Mexico, to infer the weathering, provenance, and degree in which trace metal pollution affects the beach sediment composition.

TL;DR: An overview of the recent progress and challenges involved in modelling digital rock physics, chemistry, and biology of multiscale systems is presented here.

TL;DR: In this article, the impact of image resolution and other means of estimating mineral reactive surface area on simulated mineral reactions and reaction rates is investigated. But, the results show that the effect of surface area values on simulated reaction rates and porosity evolution depends on the reactivity of the mineral phase.

TL;DR: In this article, a comprehensive chemical and isotopic comparison of geothermal fluid between the Xianshuihe-Anninghe Fault and the Longmenshan-Minjiang Fault was investigated.

TL;DR: In this paper, a detailed characterization of the mineralogy, chemistry, particle size and surface area of six mined basalts being used in large-scale ERW field trials is presented.

TL;DR: In this paper, a broad spatial scope of the occurrence and distribution of strontium (Sr) and the relative importance of controlling factors on Sr concentration are spatially variable and partly dependent on the type of groundwater well.

TL;DR: The effectiveness of the intelligent interpretation and visualization of geochemical exploration data supported by GIS and machine learning algorithms was demonstrated using a case study of processing a regional-scale geochemical survey dataset collected from Sichuan Province, China.

TL;DR: In this article, the amount of trace metal elements (TMe) in the phosphate rock wastes resulting from the processing of phosphate run-of-mine was analyzed. But the results showed that the analysed wastes are P-enriched (P2O5 = 20% - 27% -27% %) together with similar mineralogy such as natural phosphorites (carbonate fluor-apatite), but they displayed an enhancement in matrix phases.

TL;DR: In this article, the authors report a potential map of radon distribution in the Campania region of southern Italy, using the geostatistical kriging interpolation method using QGIS® software.

TL;DR: In this paper, three statistical methods, namely, Random Forest (RF), Artificial Neural Network (ANN), and Logistic Regression (LR), were used for groundwater fluoride prediction in Datong Basin.

TL;DR: Wang et al. as discussed by the authors showed that the median Cr value (baseline) of China is 50μg/g, and the ultramafic and mafic rocks respectively have median Cr values of 1609 and 129 µm/g based on 52 and 551 samples, much higher than those in intermediate rocks (47 µm+g on 991 samples) and felsic rocks (7.0 µm−g on 2558 samples).

TL;DR: In this article, HMs polluted farmland soils were collected from several typical mining areas distributed from the south to the center of China, with distinct soil physicochemical properties, and the association relationship between HMs and Fe fractions was determined using chemical extraction and correlation analysis.

TL;DR: The results obtained demonstrated that exploration targeting models are affected by the ratio of non-deposit and deposit sites, and balancing between the number of deposit and non-Deposit sites is an efficient way to produce more-reliable exploration targets when supervised algorithms are applied for modeling.

TL;DR: In this paper, the authors present recent advances in the design of sensor, type of transducer and sensing elements for the detection of trace metals, including optical, chemical, electrochemical and field effect transistor sensors.

TL;DR: Wang et al. as mentioned in this paper used Pearson correlation coefficients of environmental factors containing each of the eight heavy metals (Zn, As, Cd, Cr, Cu, Ni, Pb, Hg) to assess the soil contamination risk to local residents in a mining area.

TL;DR: In this article, the scandium speciation in bauxite residues of different origin was investigated using a combination of different analytical tools, such as laser ablation inductively coupled plasma mass spectrometry, X-ray absorption near edge structure (XANES) spectroscopy, μ-Raman and scanning electron microscopy and electron microprobe analyses.

TL;DR: In this article, the authors examined Hg stable isotopes in atmospheric particulate Hg, gaseous elemental Hg and surface snow in the high Arctic (Alert, Canada) during polar spring from 2011 to 2015, in order to trace the sources of atmospheric Hg.

TL;DR: In this paper, the authors dealt with understanding hydrogeochemical evolution, ascertaining distribution, fate and spatio-temporal variation of arsenic along with comprehending recharge processes and quantification of recharge rate in the central Gangetic plain, India.

TL;DR: In this paper, the authors proposed an estimation and conversion of the measurement unit of soil minerals in amplitude to g kg−1 using a small dataset of mineral content quantified via X-Ray powder diffraction.

TL;DR: In this paper, the authors collected water samples from the Upper Cretaceous to Lower Eocene strata of the Jiangling Basin, South China, and investigated their chemical and isotopic characteristics and the mineralogy of corresponding reservoir rocks.

TL;DR: In this paper, groundwaters collected from the undisturbed Picaron Cu-Mo porphyry and exotic prospect (Atacama region, Chile) were analyzed for major and trace elements, along with isotopes of Cu, Mo, S, and 87Sr/86Sr.

TL;DR: In this paper, the long-term retention of added Sb(V) to nine soil samples with contrasting soil properties and to a model iron (Fe; hydrous ferric oxide or HFO) and aluminium (Al, hydrous aluminium oxide or HAO) hydroxide under aerobic conditions was studied with X-ray absorption spectroscopy (XAS).

TL;DR: In this article, the authors present two computing tools, ClayTherm and ISTherm, devoted to the estimation of the thermodynamic properties of both anhydrous and hydrated clay minerals, and of illite/smectite (I/S) mineral series.

TL;DR: In this paper, the authors investigated geochemical characteristics of rare earth elements (REE) in sediment samples collected from the piedmont, central and littoral plains of the North China Plain.

TL;DR: In this paper, the plutonium uptake by Portland cement in degradation stage II was investigated in the presence of α-D-isosaccharinic acid (ISA) under reducing conditions set by hydroquinone, Sn(II) or Na2S2O4.

TL;DR: Wang et al. as mentioned in this paper collected surface dust samples from 30 different sites in Shenyang City, China, and analyzed the chemical speciation of metals in surface dust, including chromium (Cr), arsenic (As), cupper (Cu), lead (Pb), zinc (Zn), nickel (Ni), mercury (Hg) and cadmium (Cd), and found that these metals are influenced by anthropogenic activities.