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Journal of Geochemical Exploration
Papers 4277
1 page of 428 pages (4,277 results)
Published in Journal of Geochemical Exploration 3.47
Valérie Cappuyns20
Estimated H-index: 20
(Katholieke Universiteit Leuven),
Hannes Claes8
Estimated H-index: 8
(Katholieke Universiteit Leuven)
+ -3 AuthorsRudy Swennen55
Estimated H-index: 55
(Katholieke Universiteit Leuven)
Abstract “Schistes carton”, Jurassic black shale rocks occurring in the south-western part of the Grand Duchy of Luxembourg, were investigated, based on a combined mineralogical and geochemical approach. The major aim of this study was to understand the lateral and vertical variation in mineralogy, and the distribution of major and trace elements within the different black shale lithologies, as well as in the overlying soils. The mobility of trace metal(loids) in the black shale and in the soil ...
Published in Journal of Geochemical Exploration 3.47
Donald Grzela (Laval University), Georges Beaudoin24
Estimated H-index: 24
(Laval University),
Émilie Bédard4
Estimated H-index: 4
(Laval University)
Abstract Tourmaline, scheelite, and magnetite from orogenic gold deposits (n = 22) and glacial sediments (n = 5) of the Val-d'Or mining district (Quebec, Canada) were investigated by Electron Probe Micro-Analyzer (EPMA) and Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) in order to determine their chemical signature and to assess their potential as indicator minerals for gold exploration. Three types of tourmaline are recognized. Type I tourmaline from deposits hosted in...
Published on Jun 1, 2019in Journal of Geochemical Exploration 3.47
Ma. Chrizelle Joyce O. Bacal (Pai Chai University), SangGi Hwang (Pai Chai University), Ivy Guevarra-Segura (Pai Chai University)
Abstract Two machine learning algorithms, C4.5 and random forest, collectively known as decision trees were utilized to directly establish the relationship between geochemical maps of South Korea and its geology. Using a large database containing geochemical and lithologic properties, inconsistencies in the a priori lithologic information were fixed using confusion matrix analysis and F-measure comparison via iterative C4.5 implementation. This corrective method resulted in eighteen rock classes...
Published on Jun 1, 2019in Journal of Geochemical Exploration 3.47
Prafulla Kumar Sahoo9
Estimated H-index: 9
Roberto Dall'Agnol21
Estimated H-index: 21
+ 8 AuthorsMarlene F. da Costa3
Estimated H-index: 3
Abstract A high resolution (high density) survey is required to estimate site-specific baseline metal levels in water on a local scale, and is an essential part of environmental risk assessment. This methodology was used in a project in the Itacaiunas River Basin, southeastern Amazon, which includes several mines of the Carajas Mineral Province (as part of the Itacaiunas Geochemical Mapping and Background Project, ItacGMBP). A total of 1429 samples (including 55 duplicates) were collected in 201...
Published on Jul 1, 2019in Journal of Geochemical Exploration 3.47
Yunmei Cai (CAS: Chinese Academy of Sciences), Jiandong Wu + 2 AuthorsYisheng Peng (SYSU: Sun Yat-sen University)
Abstract To clarify the distribution, sources, and ecological risk of 16 polycyclic aromatic hydrocarbons (PAHs) in sediments of mangrove wetland from Shantou, twenty-eight surface sediment were collected. The PAHs concentrations ranged from 79.74 to 853.17 ng/g dry weight (dw). Spatially, the PAHs contents of sediment in the high tides were higher than that in the low tides, higher at mangrove-planting area than that non mangrove growth zone. The major sources of PAHs were traffic emission (67....
Published on Oct 1, 2019in Journal of Geochemical Exploration 3.47
Afsane Jafari (FUM: Ferdowsi University of Mashhad), Mohammad Hassan Karimpour9
Estimated H-index: 9
(FUM: Ferdowsi University of Mashhad)
+ 2 AuthorsMinghua Ren (UNLV: University of Nevada, Las Vegas)
Abstract The Golgohar iron mine is located southwest of Sirjan in the Sanandaj-Sirjan structural zone. The Golgohar ore deposit occurs mainly in the forms of massive, dispersed in altered rocks and rarely stratabound mineralizations, which is related to a fault zone. The mineralization is hosted by metapelites and metabasites. To clarify the paleotectonic, P-T condition of metamorphism and the genesis of the Golgohar ore deposit we report ICP-MS data of metamorphic rocks and EPMA data of feldspa...
Published in Journal of Geochemical Exploration 3.47
Birane Niane3
Estimated H-index: 3
(University of Geneva),
Naresh Devarajan (UCSB: University of California, Santa Barbara)+ -3 AuthorsRobert Moritz22
Estimated H-index: 22
(University of Geneva)
Abstract This study describes Hg-resistant bacterial present in the aquatic sediments artisanal small-scale gold mining ASGM activities along Gambia River Kedougou, Senegal. Mercury (Hg) is used for gold amalgamation in artisanal small-scale gold mining (ASGM) activities. The level of total Hg in sediment samples was determined by automatic mercury analyser. Bacterial (colony-forming units) susceptibility to Hg was evaluated by minimal inhibitory concentrations. The phylogenetic diversity analys...
Published on Oct 1, 2019in Journal of Geochemical Exploration 3.47
Chia Chuan Liu16
Estimated H-index: 16
(NCKU: National Cheng Kung University),
Jiin-Shuh Jean29
Estimated H-index: 29
(NCU: National Central University)
+ 3 AuthorsWen-Shan Chen (NTU: National Taiwan University)
Abstract High arsenic concentration in groundwater is influenced by redox reactions in As-bearing iron (oxy)hydroxide minerals and elevated total organic carbon, resulting in arsenic contamination and enrichment in groundwater after introduction of seawater into an aquifer. In this study, hydrochemical and isotopic (S, O and C) techniques were used to relate arsenic contamination and seawater flooding/intrusion in groundwater aquifers in the Chianan Plain, southwestern Taiwan. Thirty-three sampl...