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National-scale Geochemical Survey: Distribution of chemical elements in stream sediment of South and Central Asia J. Geochem. Explor. (IF 3.9) Pub Date : 2024-03-15 Jun Hong, Guanglu Meng, Jing Zhang, Jifei Cao, Bin Wang, Yanjun Luo, Bo Yang, Xueqi Zhang, Domenico Cicchella, the NGSSCA Project Team
This work was carried out as the Pakistani, Uzbekistani, Tajikistani, and Kyrgyzstani contribution to the National-scale Geochemical Survey of South and Central Asia (NGSSCA) project, the objective of which was to document and study the amounts and distribution of chemical elements in stream sediment of South and Central Asia where such national-scale geochemical mapping is launched for the first time
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Corrigendum to “The mineralogy and geochemistry of the Pirashkaft bauxite, Zagros belt, Iran: New inferences on the paleo-climate at the time of formation and on the nature of the parent rock” [J. Geochem. Explor. (2024, 107394)] J. Geochem. Explor. (IF 3.9) Pub Date : 2024-03-07 Batoul Taghipour, Shokat Jahangirzadeh, Nicola Mondillo
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Evaluating StackingC and ensemble models for enhanced lithological classification in geological mapping J. Geochem. Explor. (IF 3.9) Pub Date : 2024-03-06 Sasan Farhadi, Samuele Tatullo, Mina Boveiri Konari, Peyman Afzal
Lithological classification is a crucial aspect of mineral exploration, providing insights into rock and mineral types in a given area. Conventional methods for lithological classification can be limited in terms of coverage, accuracy, and efficiency, often experiencing significant time and cost. Machine learning techniques have demonstrated considerable potential in improving the efficiency and accuracy
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Biotite chemistry as an indicator of hydrothermal deposit types and fluid sources: Insights from big data compilation, multivariate statistical analysis, and machine learning J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-27 Abu Saeed Baidya, Giridas Maiti, Subhronil Mondal, Dewashish Upadhyay
Identification of a deposit type in an early stage of exploration can save money and time. However, despite several studies, there is a lack of simple deposit classifiers based exclusively on the major and trace element chemistry of minerals, which is relatively easier to measure. Furthermore, the identification of fluid source is crucial for any ore-genetic study, as it exerts a first order control
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Electrokinetic remediation: Past experiences and future roadmap for sustainable remediation of metal-contaminated soils J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-27 Sonam Taneja, Oznur Karaca, Anil Kumar Haritash
Soil pollution due to heavy metals has become a serious environmental concern in the past decade, adversely affecting soil conditions and global food security. Due to this, considerable attention has been given to developing suitable remediation technologies, particularly for heavy metals. Among them, Electrokinetic Remediation (EKR) is a promising developing technique due to its great efficiency for
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High-performance imbalanced learning ensembles of decision trees for detecting mineralization anomalies from geochemical exploration data J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-27 Min Guo, Yongliang Chen
How to effectively detect geochemical anomalies associated with mineralization is a challenging task due to the extreme class-imbalance of geochemical exploration data. To address this challenge, various machine learning techniques have been employed to detect geochemical anomalies associated with mineralization. However, almost all of these machine learning techniques have their limitations when it
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Robust CoDA balances and the role of the variance in complex riverine geochemical systems J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-27 Caterina Gozzi, Matthias Templ, Antonella Buccianti
This study introduces a robust method for analyzing the geochemical behavior of chemical species in river catchment water. It focuses on isometric log-ratio coordinates obtained from a sequential partition method that successively maximizes the explained variance in the data set. Robust orthonormal coordinates are created based on hierarchical clustering and robust estimation of the variation matrix
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Variation of chalcophile elements in base metal sulfide minerals from the Jinchuan magmatic Ni–Cu sulfide deposit, NW China: Implications for mineral exploration J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-26 Long-Jiao Li, Xian-Cheng Mao, Zhan-Kun Liu, Yong-Cai Wang, De-Xian Li, Qi-Xing Ai, Yun-Qi Wang
Magmatic sulfide ores from the western and eastern intrusions of the world's third-largest Jinchuan Ni–Cu deposit are separated into disseminated, net-textured, and massive sulfides, or Fe-rich, transitional, Cu-rich ores. However, the composition of base metal sulfide (BMS) minerals from each intrusion and ore type still lacks investigation. By comparing the variations of chalcophile element composition
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The importance of geochemical and mineralogical characterization of fresh Cu-Porphyry mine tailings in mineral processing plants to optimize their revalorization potential J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-25 Sebastián García, Lorena Camus, Erika Gonzalez-Diaz, Roberto Collao, Brian Townley, Annika Parviainen, Manuel A. Caraballo
The existence of enormous volumes of mine tailings (MTs) deposits around the World, and specially in Chile, has generated a growing interest about the potential economic and socio-environmental benefits of reprocessing them. The present study assesses this possibility in the world class example of Mineral Valle Central (MVC), one of the few MTs reprocessing plants that has been under operation since
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How to choose a proper representation of compositional data for mineral exploration? J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-12 Behnam Sadeghi, Hossein Molayemat, Vera Pawlowsky-Glahn
Regional mineral exploration is based on geochemical data of which the nature is compositional and frequently involves a large number of components. Consequently, it mostly needs multivariate dimension reduction methods such as principal component analysis (PCA) and its various robust versions. The application of such methods, defined for real random variables, require the data to be represented in
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Mineralogy, geochemistry and mineralization of iron ore deposition in NW Sanandaj-Sirjan Geological Zone: A futuristic review based on a representative case study J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-10 Afshin Akbarpour, Jalil Ghalamghash, Hossein Azizi, Behnam Sadeghi
This study focuses on NW Sanandaj-Sirjan zone and its iron ore deposition, including a representative case study, called Maimoon-Abad area. This zone is a significant geological feature within Iran's. This region boasts diverse iron ore occurrences intricately intertwined with volcano-sedimentary rock formations, some with notable economic potential. In the geological context, the study reveals metamorphosed
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Phytoremediation: An emerging green technology for dissipation of PAHs from soil J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-10 Harleen Kaur, Akshay Kumar, Shayla Bindra, Ashish Sharma
Various pollutants are released into environment due to extensive anthropogenic activities. Polycyclic Aromatic Hydrocarbons (PAHs) are one such pollutants that causes great damaging effect to ecology and living creatures. PAHs are known to have carcinogenic, mutagenic, teratogenic, genotoxic effects on plants and animals. In order to reduce the level of PAHs in environment and to remediate the contaminated
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Spatial distribution and potential health risk assessment for fluoride and nitrate via water consumption in Pakistan J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-10 Imran Ud Din, Wajid Ali, Said Muhammad, Mohammed Rafi Shaik, Baji Shaik, Inayat ur Rehman, Cem Tokatli
This study investigated the levels of fluoride (F) and nitrate (NO) and their associated potential health implications via the consumption of drinking water from different sources across various provinces of Pakistan. A dataset comprising mean values of F and NO based over the past 20 years (2002−2022) published were collected from Willey, ResearchGate, Springer, Mendeley, Science Direct, Google Scholar
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Fluid inclusion constraint on sulfide precipitation in wolframite-quartz veins: A case study of the giant Dajishan W polymetallic deposit, South China J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-08 Jian-Ming Cui, Pei Ni, Jun-Yi Pan, Wen-Sheng Li
Wolframite-quartz vein-type W deposits commonly produce wolframite accompanied by variable amounts of sulfides with industrial value. In such deposits, the characteristics of sulfide-forming fluids and precipitation mechanisms are poorly understood. Dajishan, located in the east of the Nanling metallogenic belt, is a giant W-polymetallic deposit with the total reserve of 190,000 t WO, 6253 t Bi, and
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Exploratory functional data analysis of multivariate densities for the identification of agricultural soil contamination by risk elements J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-08 Tomáš Matys Grygar, Una Radojičić, Ivana Pavlů, Sonja Greven, Johanna G. Nešlehová, Štěpánka Tůmová, Karel Hron
Geochemical mapping of risk element concentrations in soils is performed in many countries around the world. It results in numerous large datasets of high analytical quality, which can be used to identify soils that violate individual legislative limits for safe food production. However, there is a lack of advanced data mining tools that would be suitable for sensitive exploratory data analysis of
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Application of deep neural network to discriminating chalcopyrite deposits, ore types, and textures J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-07 Xiaohao Zhang, Yunyun Niu, Guodong Zhu, Shuangwei Wan
The trace elements of chalcopyrite have indicative significance in the formation process and genetic types of its deposits. They can also function as indicator minerals for mineral exploration. This study investigates the chalcopyrite in the global representative Ni-Cu sulfide deposits and Reef-type PGE deposits, and establishes deep neural network (DNN) models to discriminate the chalcopyrite deposits
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The genesis of the Tianbaoshan Pb[sbnd]Zn deposit in Sichuan, SW China: Insights from sphalerite and fluid inclusion compositions J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-06 Lian-Qing Zhao, Pei Ni, Wen-Sheng Li, Stefano Albanese, Kai-Han Zhang, Guo-Guang Wang, Jun-Yi Pan
The Tianbaoshan deposit, located in the Sichuan–Yunnan–Guizhou (SYG) metallogenetic belt, is one of famous PbZn deposits of Southwest China, with an established reserve of 2.6 Mt. Pb and Zn. According to the detailed field geological survey and microscopic petrography observation, three distinct ore fluid evolution stages can be divided. In this contribution, sphalerite and associated quartz from above
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Spatio-temporal variations in groundwater quality in the parts of South-western Punjab, India J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-06 Parwinder Singh, Raj Setia, Anurag Malik, Karamjit Singh Sekhon, Manpreet Singh Mavi
Spatio-temporal variations in groundwater quality for drinking and irrigation purposes were assessed in the parts of Bathinda district in Punjab (India). A total of 800 geotagged water samples (400 samples in each season) were collected from running tubewells during pre-monsoon (June 2020) and post-monsoon (October 2020) seasons. These water samples were analyzed for pH, electrical conductivity (EC)
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An enhanced strategy for geo-exploratory data analysis to facilitate the discovery of new mineral deposits J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-06 Wenlei Wang, Zhibo Liu, Jie Tang, Changjiang Yuan
The present study introduces an advanced strategy for analyzing geo-exploratory datasets for regions with limited exploration and research progress. Nonlinear techniques are utilized to scrutinize geological mapping and geochemical exploration data at a scale of 1:50,000 in the Zhule-Mangla district, Northern Tibet, China. To investigate the Cu mineralization associated with porphyry systems in this
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A data-driven VIKOR procedure for predictive modeling of porphyry copper prospectivity in SE Iran J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-06 Sarina Akbari, Hamidreza Ramazi, Reza Ghezelbash
This research is aimed at comparing the performance of a proposed data-driven VIKOR method with its knowledge-driven version for porphyry copper prospectivity modeling in the Sardouyeh district, Kerman province, SE Iran. Sixteen exploratory layers from various sources were first nominated for this purpose. These layers were provided from the following sources: (1) multi-element geochemical signatures
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Comparison of elemental composition of surface and subsurface soils on national level and identification of potential natural and anthropogenic processes influencing its composition J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-05 Emil Pučko, Gorazd Žibret, Klemen Teran
The elemental composition of soils is governed by geogenic processes and anthropogenic activities. A comprehensive soil study was conducted on a national level, in which the elemental composition of soils from two different layers was compared with the intention to differentiate between natural and anthropogenic sources of elemental enrichments. Topsoil (0–5 cm) and subsoil (20–30 cm) samples were
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Distribution of indium and gallium in sphalerite from skarn and hydrothermal vein deposits in the Hwanggangri mineralized district, South Korea J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-05 Hyewon Kim, Dongbok Shin, Heonkyung Im, Byeongyong Yu, Sun Ki Choi
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Microanalytical investigation of K-rich fenites from the Catalão II alkaline‑carbonatite complex in Central Brazil: Implications for ore-forming processes within the world's largest niobium province J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-05 Felipe Velásquez-Ruiz, Martin Reich, Pedro Cordeiro, Leonardo Lagoeiro, Thomas Angerer
Alkaline‑carbonatite complexes are the main source of critical raw materials such as niobium (Nb) and rare earth elements (REE), which concentrate through a combination of magmatic and carbohydrothermal processes. These systems typically occur in close spatial connection with altered country rocks resulting from metasomatic alteration by exsolved K-Na-rich fluids, a process known as fenitization. Thus
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Mineral exploration model for Lhasa Area, eastern Gangdese metallogenic belt: Based on knowledge-driven compositional data analysis and catchment basin division J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-05 Bingli Liu, Wenbao Zheng, Lu Wang, Cheng Li, Yunhui Kong, Rui Tang, Dejiang Luo, Miao Xie
With the reduction in outcrop mines, the finding of hidden deposits has become more difficult than ever before. Traditional geochemical single element anomalies extraction, especially the ore-forming elements, are facing issues in judging regional potential mineralization, while in contrast approaches to examine geochemical association can provide more information. Along these lines, in this work,
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U-Pb geochronology, tourmaline geochemistry, and stable (B, S) isotope constraints from the Hirvilavanmaa Au-only and the polymetallic Naakenavaara orogenic gold deposits, Central Lapland belt, northern Finland J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-05 Mikael Vasilopoulos, Ferenc Molnár, Jukka-Pekka Ranta, Matti Kurhila, Hugh O'Brien, Yann Lahaye, Sari Lukkari, Marko Moilanen
In this study of the Hirvilavanmaa Au-only and the polymetallic (Au-Cu-Co-Ni) Naakenavaara orogenic gold deposits from the Central Lapland belt (CLB) we present precise U-Pb ages obtained by single collector LA-ICP-MS from hydrothermal monazite and xenotime associated with different stages of hydrothermal activity in the deposits. We also use crystal chemical data from tourmaline, and in situ sulfur
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Characteristics and migration patterns of selenium in soil, crops, and hair within a typical alkaline arid agricultural region of Northwest China J. Geochem. Explor. (IF 3.9) Pub Date : 2024-02-04 Xiaoyan Ma, Wanshan Lei, Xin Lin, Xiangchuan Li, Shengfei Yang, Xiaohuang Liu, Tuo Liu
The soil is the primary source of selenium intake for humans and animals. Investigating selenium's migration from soil to crops and the human body holds significant scientific value in assessing agroecosystems and human well-being. This study analyzes selenium levels in soils, crops, and human hair in Aksu, Xinjiang, a selenium-rich farmland, focusing on the Selenium-Crop-Hair System (SCHS). In Aksu's
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Zinc isotopes revealed the role of ore-hosting carbonate rocks in the formation of MVT deposits: A case study of the Huize PbZn deposit, SW China J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-10 Hao Zhang, Jia-Xi Zhou, Mei-Fu Zhou, Zheng-Peng Yue, Ye He
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The addition of 144Nd atomic mass to routine ICP-MS analysis as a Quick Screening Tool for Approximating Rare Earth Elements (Q-STAR) in natural waters J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-14 Elizabeth J. Tomaszewski, Zhouming Sun, Anthony J. Bednar
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Integrating multivariate hydrogeochemical analysis with human health risk assessment: An inverse geochemical and statistical modeling approach J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-06 Neelam Sidhu, Lakhvinder Kaur, Madhuri S. Rishi, Syed Nasir U. Din, Karan Tewari, Paramjit Singh
Chandigarh, an urban center meticulously planned in India, partially relies on groundwater for its water supply. However, rapid urbanization, geological heterogeneity, and anthropogenic actions have elevated the significance of ensuring water quality. This research employs advanced methodologies including inverse geochemical modeling through PHREEQC, multivariate statistics, and the Nemerow Pollution
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Mineral exploration and regional surface geochemical datasets: An anomaly detection and k-means clustering exercise applied on laterite in Western Australia J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-06 Mário A. Gonçalves, Diogo Rasteiro da Silva, Paul Duuring, Ignacio Gonzalez-Alvarez, Tania Ibrahimi
A comprehensive geochemical survey was conducted in the western Yilgarn Craton, Western Australia, in 2007, collecting 3142 surface samples of regolith. Our study used this data to target potential sites for undiscovered buried or concealed Cu-Zn-Pb, and NiCu deposits. The core approach used the singularity mapping technique for detecting anomalies at the local scale. This work proposes a procedure
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Geochemistry of Bled El Hadba phosphorites (NE Algeria): Glauconitization process versus REE-enrichment J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-08 Khaled Laouar, Rabah Laouar, Olivier Bruguier, Delphine Bosch, Rabah Kechiched, Salah Bouhlel, Ali Tlili
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Polycyclic aromatic hydrocarbons (PAHs) in the surficial sediments of the Abadan freshwater resources − Northwest of the Persian Gulf J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-06 Hamed Haghnazar, Yasaman Abbasi, Reza Morovati, Karen H. Johannesson, Renato Somma, Mojtaba Pourakbar, Ehsan Aghayani
This research focused on investigating the contamination levels, sources, and potential ecological and human health risks associated with 16 polycyclic aromatic hydrocarbons (PAHs) present in surficial sediments of the Abadan freshwater resources in the northwest of the Persian Gulf. The concentrations of ∑16PAHs varied between 67.8 and 57,748 ng/g with an average of 8222 ng/g. Approximately 30 % of
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Geochemical status of non-reclaimed ash dumps subjected to long-term self-overgrowing: Evidence from the Tyumen, Russia J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-05 Alexandr Konstantinov, Elizaveta Konstantinova, Andrey Novoselov, Alina Kurasova, Evgeny Shuvaev, Aleksey Sherstnev, Varvara Zaitseva, Tatiana Minkina
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Nature, source, and evolution of the ore-forming fluids in the Dunbasitao gold deposit, East Junggar, China: Constraints from geology, fluid inclusions, and C-H-O isotopes J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-07 Wenxiang Liu, Xiaohua Deng, Franco Pirajno, Shen Han, Xi Chen, Xun Li, Abulimiti Aibai, Yanshuang Wu, Yong Wang, Yanjing Chen
The origin of CO2-dominated fluids in orogenic gold deposits is usually mired in controversy. The Dunbasitao gold deposit is the largest among several gold deposits along the Armantai suture zone, East Junggar, China. Orebodies are hosted in volcano-sedimentary rocks of the Lower Carboniferous Jiangbasitao Formation and porphyritic quartz diorite and are controlled by shear zones. Based on the cross-cutting
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Exploring geochemical data using compositional techniques: A practical guide J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-10 Juan José Egozcue, Caterina Gozzi, Antonella Buccianti, Vera Pawlowsky-Glahn
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A performance study of local outlier detection methods for mineral exploration with geochemical compositional data J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-09 Patricia Puchhammer, Charmee Kalubowila, Lorena Braus, Solveig Pospiech, Pertti Sarala, Peter Filzmoser
In exploration geochemistry, mineral deposits are typically characterised by an enrichment of the targeted elements, and thus their element composition differs from that of samples in a local neighbourhood. Local outlier detection methods aim at identifying local changes. In contrast to conventional outlier detection procedures, local outlier detection methods are multivariate methods for outlier identification
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Hydrochemical properties of groundwater and land use and land cover changes impact on agricultural productivity: An empirical observation and integrated framework approaches J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-08 Indrajit Chowdhuri, Subodh Chandra Pal
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Using machine learning to identify indicators of rare earth element enrichment in sedimentary strata with applications for metal prospectivity J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-08 Brendan A. Bishop, Leslie J. Robbins
Rare earth elements (REE), classified as critical minerals which are crucial for clean energy technologies, face soaring demand. While economic deposits are found in limited geologic environments including carbonatites and ion-adsorption clays, unconventional, secondary sources such as those from sedimentary basins could hold potential to meet this increased demand. Coal and its associated combustion
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The mineralogy and geochemistry of the Pirashkaft bauxite, Zagros belt, Iran: New inferences on the paleo-climate at the time of formation and on the nature of the parent rock J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-06 Batoul Taghipour, Shokat Jahangirzadeh, Nicola Mondillo
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Concentration and distribution patterns of rare earth elements (REEs) in stream sediments of Pakistan J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-06 Zhihua Wang, Jun Hong, Xin Lin, Huishan Zhang, Yasir Shaheen Khalil, Naghma Haider, Mehboob Ur Rashid, Muhammad Jawad Zeb, Asad Ali Narejo
Currently, the metals of Rare Earth Elements (REEs) have become very critical to various modern technologies ranging from cell phones and televisions to LED light bulbs and wind turbines. This work was carried out as the Pakistani contribution to the National-scale Geochemical Survey of South and Central Asia (NGSSCA) project. The objective of this study was to document and study the amounts and distribution
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Portable XRF applied to regional bedrock mapping in Quebec, Canada J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-06 Pierre-Simon Ross, Mélanie Beaudette, Yannick Daoudene
Whole-rock geochemistry yields better geological maps of the bedrock, since it allows, for example, visually similar lithologies to be distinguished. However, conventional laboratory geochemistry is not available in the field during a mapping campaign. Portable X-ray fluorescence (pXRF) analyzers can produce fit-for-purpose data rapidly, and constitute a useful complement to conventional geochemistry
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Hyperspectral mapping of magmatic-hydrothermal sericite, Battle Mountain mining district, Nevada J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-05 John M. Meyer, Elizabeth A. Holley, Raymond F. Kokaly
We demonstrate the utility of multi-scale imaging spectroscopy data (hyperspectral data) to differentiate magmatic-hydrothermal sericite from other white micas based on grain size, in a case study of the Battle Mountain mining district in Humboldt and Lander Counties, Nevada. The Battle Mountain mining district contains porphyry, skarn, and distal disseminated deposits that formed in magmatic-hydrothermal
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Drinking and irrigation quality and pollution assessments of the groundwater resources from Alappuzha in Kerala (India) through an integrated approach using WQI and GIS J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-05 Akhila V. Nath, Selvam Sekar, Priyadarsi D. Roy, Jesuraja Kamaraj, Saurabh Shukla, Ramsha Khan
Groundwater in coastal areas, with surging population and growing settlements, is constantly at risk of pollution. Alappuzha is one of the most well-developed coastal districts in the southwestern Indian state of Kerala and employing various physico-chemical parameters (pH, EC, TDS, alkalinity, hardness, and contents of sodium, potassium, calcium, magnesium, carbonate, bicarbonate, chloride, sulphate
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Intelligent mapping of geochemical anomalies: Adaptation of DBSCAN and mean-shift clustering approaches J. Geochem. Explor. (IF 3.9) Pub Date : 2024-01-05 Mahsa Hajihosseinlou, Abbas Maghsoudi, Reza Ghezelbash
Cluster analysis can be used to organize samples and generate ideas regarding the multivariate geochemistry of given dataset. Traditional clustering techniques have the drawbacks of high computational complexity and poor adaptability to big data. Hence, there has recently been much focus on creating better clustering algorithms. Although many clustering algorithms have been applied, and some produce
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Applying industrial side streams in the neutralization of acid generating sulfide-rich sediments – The impact on pH and leaching of harmful elements J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-20 Thomas Kronberg, Timo Tarvainen, Jaakko Auri, Jan-Erik Eriksson, Stefan Mattbäck, Anton Boman
Acid sulfate soils can cause severe environmental harm due to a low pH and mobilization of harmful elements. Acid sulfate soil material is formed when oxidation of sulfide minerals causes a drop in pH to <4.0 for mineral oil materials and <3.0 for organic soil materials or when the soil materials contain enough sulfide to potentially do so. Two dredged, acid sulfate soil materials from Finland were
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Geological controls on lithium production from basinal brines across North America J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-15 Mohammad Marza, Grant Ferguson, Jon Thorson, Isabel Barton, Ji-Hyun Kim, Lin Ma, Jennifer McIntosh
With increasing lithium (Li) demands for electric car batteries and grid storage, additional Li beyond traditional continental brines and hard-rock sources might be necessary. Elevated Li concentrations have been reported in select oil field brines. Li could be extracted from the large volumes of saline fluids produced by oil and gas wells or from new wells dedicated to Li production. However, the
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Geochemical baselines of potentially toxic elements in Brunei-Muara soils, Brunei Darussalam: Towards environmental assessment and risk management J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-18 Khairunnisa Nazirah Karim, Basilios Tsikouras, Elena Ifandi, Chun-Kit Lai, Liyana Nadiah Osli, Mohamed Ragab Shalaby, Md Aminul Islam
We present a comprehensive study on the presence of potentially toxic elements (PTEs) in the topsoil and subsoil of Brunei-Muara District in Brunei Darussalam. Descriptive statistics were employed to analyze the data, and the threshold values for PTEs in both soil layers were determined. Adopting the Tukey's inner fence method, we recommend baselines for PTEs. The study delved into the distribution
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Fractal modeling for geochemical data of deep-sea surface sediments: A case study from Zhongsha Island, Southern China Sea J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-14 Yan Zhang, Li Zhang, Fan Xiao, Yongzhang Zhou, Shiqiao Liu, Xiaoqiang Hu
This study applied principal component analysis (PCA), concentration-area (C-A) and spectrum-area (S-A) fractal models to identify geochemical element combination anomalies related to heavy metals from the data for 43 geochemical elements in surface sediments of the Zhongsha Islands. The relationships between these 43 elements were first examined by applying correlation and cluster analysis to the
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Role of boiling for the formation of vertical metal zoning and bonanza zone in low-sulfidation epithermal gold‑silver deposits: A geochemical modeling approach J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-08 Michitaka Aruga, Akira Imai
Boiling and mixing are thought to be the most important processes for mineralization in the low-sulfidation epithermal gold‑silver deposits. Some low-sulfidation epithermal gold‑silver deposits show vertical zoning of metals including gold, silver, copper, lead, and zinc, but effect of boiling and mixing for the vertical zoning of metals through mineralization has been scarcely debated. Therefore,
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Assessment of depth wise distribution, enrichment, contamination, ecological risk and sources of soil heavy metals over an Industrial area in Southern India J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-08 Tarik Mitran, Janaki Rama Suresh Gunnam, Sujatha Gourigari, Sreenivas Kandrika
Assessing the depth-wise distribution of heavy metals in soil can provide valuable insights into the extent of enrichment, contamination, and the possible sources of pollutants. A study was conducted in parts of Patancheru Industrial areas of Hyderabad, India to assess the vertical distribution of heavy metal content in soil, focusing on enrichment, contamination, and pollutant sources. Sixty soil
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Appraisal of health risks associated with exposure of fluoride and nitrate contaminated springs in the Doda Kishtwar Ramban (DKR) region of Jammu and Kashmir, India J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-07 Ajay Kumar Taloor, Swati Sharma, Rayees Ahmad Pir, Kireet Kumar
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Estimating annual CO2 emissions and building a leakage scenario in a tectonically quiescent area J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-01 Soonyoung Yu, Gitak Chae, Sung-Wook Kim, Ho-Rim Kim, Chan Yeong Kim, Gibeom Seok, Seong-Taek Yun
Soil CO2 flux (FCO2) was intensively measured in a natural CO2 emission site located in a tectonically quiescent area, with topographic and geophysical investigation, to estimate annual emissions and causes of focused leaks. FCO2 varied between 6.5 and 2155.4 g/m2/d (median 76.1 g/m2/d; n = 67) within a 612 m2 area situated close to a CO2-rich groundwater well. The threshold value for geogenic FCO2
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Deep epithermal Au mineralization at Tuanjiegou, northeast China J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-02 Yang Liu, Jinggui Sun, Matthew J. Brzozowski, Chen Liu
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Hyperspectral (VNIR-SWIR) analysis of roll front uranium host rocks and industrial minerals from Karnes and Live Oak Counties, Texas Coastal Plain J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-02 Bernard E. Hubbard, Tanya J. Gallegos, Victoria Stengel, Todd M. Hoefen, Raymond F. Kokaly, Brent Elliott
VNIR-SWIR (400–2500 nm) reflectance measurements were made on the surfaces of various cores, cuttings and sample splits of sedimentary rocks from the Tertiary Jackson Group, and Catahoula, Oakville and Goliad Formations. These rocks vary in composition and texture from mudstone and claystone to sandstone and are known host rocks for roll front uranium occurrences in Karnes and Live Oak Counties, Texas
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Deciphering the ore-forming process of Sb-W deposits through scheelite and stibnite trace element geochemistry J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-02 Tianxing Wang, Shanling Fu, Neal A. Sullivan, Jiangbo Lan, Luming Wei
Antimony (Sb) and tungsten (W) and deposits typically form in distinct and unrelated ore-forming environments. However, in rare cases, ore deposits may present combined Sb-W mineralization within a single deposit. These contrasting occurrences introduce uncertainty within the Sb-W ore deposit model, which ultimately guides mineral exploration strategies. Scheelite and stibnite are prevalent ore minerals
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Zircon and cassiterite U-Pb geochronology and petrochemical characteristics of early Tertiary tin mineralization at Mayo Darlé, Cameroon Volcanic Line J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-02 Solange Bih Tantoh, Bernd Lehmann, Cheo Emmanuel Suh, Ralain Bryan Ngatcha, Rongqing Zhang, John Cottle, Maurice Njiganga Nwamba, Boris V. Belyatsky, Simon Goldmann
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Mineral exploration using trace element composition of pyrite grains from till: A case study from the Petäjäselkä Au occurrence, northern Finland J. Geochem. Explor. (IF 3.9) Pub Date : 2023-12-01 Atte Taivalkoski, Jukka-Pekka Ranta, Pertti Sarala, Paavo Nikkola, Xuan Liu, Charmee Kalubowila, Ninna Immonen, Sabine Gilbricht, Ferenc Molnár
Geochemical anomalies and indicator mineral studies in glacial sediments are commonly used to define mineral exploration targets in glaciated areas. Trace element composition of sediment-hosted heavy minerals, such as pyrite and chalcopyrite, can be potentially used to fingerprint mineral deposits. This study presents results from trace element compositions of pyrite in the heavy mineral concentrates
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Geochemical prospectivity mapping using compositional balance analysis and multifractal modeling: A case study in the Jinshuikou area, Qinghai, China J. Geochem. Explor. (IF 3.9) Pub Date : 2023-11-27 Chao Li, Kefa Zhou, Wen Gao, Xianrong Luo, Zhihua Tao, Panfeng Liu, Wei Qiu
To effectively map the prospecting targets related to deposit-type sought, local indicators of spatial association (LISA), compositional balance analysis (CoBA), and multifractal modeling were applied to process stream sediment geochemical data that are collected from the Jinshuikou area, Qinghai province, China. In this study, 14 elements, including Zn, Cu, Ni, Mo, Co, V, Ti, Sb, Ag, Pb, Sn, Hg, Cd