Review
Environmental Sciences
Hojat Shirmard, Ehsan Farahbakhsh, R. Dietmar Muller, Rohitash Chandra
Summary: This paper comprehensively reviews the implementation and adaptation of popular and recently established machine learning methods for processing different types of remote sensing data in mineral exploration. By combining remote sensing data and machine learning methods, the capability to efficiently map critical geological features for potential maps is demonstrated. Moreover, advanced methods such as deep learning show potential to process the new generation of remote sensing data with high spatial and spectral resolution.
REMOTE SENSING OF ENVIRONMENT
(2022)
Article
Geochemistry & Geophysics
Emilie Bedard, Victor De Bronac de Vazelhes, Georges Beaudoin
Summary: Magnetite is a reliable indicator mineral for exploration and can be used to predict deposit types. This study aimed to determine the best predictive supervised multivariate classification method using the geochemical composition of magnetite. The Random Forest algorithm yielded the highest prediction accuracy, and the model was able to effectively predict different types of deposits in case studies. This model can be confidently used for mineral exploration.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Review
Geochemistry & Geophysics
Dahee Jung, Yosoon Choi
Summary: Recent developments in smart mining technology have led to a significant increase in research utilizing machine learning (ML) in the mining industry, with a focus on mineral exploration. Support vector machine is the most commonly used ML model, followed by deep learning models. Evaluation methods primarily focus on root mean square error and coefficient of determination.
Article
Geochemistry & Geophysics
Aurelie Boula, Christine Laporte-Magoni, Peggy Gunkel-Grillon, Olivier Bour, Nazha Selmaoui-Folcher
Summary: This study found that erosion from an old mine exacerbated sediment transport, leading to elevated concentrations of specific metals in surface waters. As a result, Cr, As, Si, Mg, and Al were identified as discriminating markers for total concentrations.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2022)
Article
Computer Science, Software Engineering
Rahul Krishna, Chong Tang, Kevin Sullivan, Baishakhi Ray
Summary: Configuration space complexity makes it difficult to configure big-data software systems well, leading to performance loss when using default configurations. We propose a new method based on sampling and cost reduction techniques to find better configurations for big data systems, and experimental results suggest significant performance improvement.
IEEE TRANSACTIONS ON SOFTWARE ENGINEERING
(2022)
Article
Geochemistry & Geophysics
Paul Heckmann, Sabina Strmic Palinkas, Harald Hansen, Giada Iacono-Marziano, Kristijan Rajic, Melanie Forien, Steffen G. Bergh
Summary: Mafic pegmatites in the Hamn intrusion of Northern Norway were studied to understand the factors controlling the development of pegmatitic textures in mafic rocks. The unzoned pegmatites showed evidence of epidotization and scapolitization, suggesting the involvement of H2O and chlorine in the formation process. The zoned pegmatites exhibited comb-like diopside layering and undercooling, indicating a different magma composition and cooling process compared to the unzoned pegmatites.
Article
Agricultural Engineering
Xinzhe Zhu, Bingyou Liu, Lianpeng Sun, Ruohong Li, Huanzhong Deng, Xiefei Zhu, Daniel C. W. Tsang
Summary: This study applied machine learning methods to comprehensively assess high-moisture municipal sludge and found that hydrothermal carbonization technology can efficiently and sustainably handle the sludge while generating valuable products. The study also identified the positive and negative impacts of sludge properties on product quality, as well as the crucial role of hydrothermal carbonization parameters in predicting product outcomes. Overall, this research provides a comprehensive reference for sustainable municipal sludge treatment and industrial application.
BIORESOURCE TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Qi-Wei Li, Jun-Hong Zhao, Mei-Fu Zhou, Jian-Feng Gao
Summary: Magmatic processes beneath the active continental margins have a significant impact on the structures and compositions of arc roots. Neoproterozoic igneous rocks are found extensively in the margins of the Tarim Block in northwest China. The Xingdier mafic-ultramafic intrusion, located at the northern margin of the Tarim Block, is composed of gabbro, pyroxenite, and peridotite units. The rocks in this intrusion exhibit varying compositions and contain elements characteristic of arc-affinity geochemistry. Their formation is likely influenced by crustal contamination and fractional crystallization processes in the arc root.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geochemistry & Geophysics
Seyed Ali Akbar Asadi, Habibollah Ghasemi, Fatemeh Sepidbar, Mohsen Mobasheri, Yuruo Shi, Richard M. Palin
Summary: The nature and formation of the Sikhoran ultramafic-mafic complex in southwest Iran is still debated. The complex is composed of various rocks and may have a polygenetic origin with different tectonic settings. The study suggests that the complex formed at different times and may have been influenced by processes such as mantle plume melting and oceanic subduction.
Article
Chemistry, Analytical
Konstantinos Kotrotsios, Anastasios Fanariotis, Helen-Catherine Leligou, Theofanis Orphanoudakis
Summary: This paper presents the results of a performance evaluation and optimization process for an indoor positioning system (IPS) designed for portable and miniaturized embedded systems. The proposed method uses RSSI values from multiple BLE beacons to infer distances and determine the final position approximation. Various ML models and optimization algorithms are applied to evaluate and optimize the accuracy of distance inference.
Article
Geosciences, Multidisciplinary
Hassan Talebi, Ute Mueller, Luk J. M. Peeters, Alex Otto, Patrice de Caritat, Raimon Tolosana-Delgado, K. Gerald van den Boogaart
Summary: Mineral deposits are local manifestations of geological processes and mineral prospectivity maps are generated by integrating proxy maps. Traditional mapping methods neglect uncertainty and interdependencies between proxy maps. This study proposes a multivariate stochastic model combining statistical simulations and machine learning algorithms for accurate prediction of mineral exploration targets.
MATHEMATICAL GEOSCIENCES
(2022)
Editorial Material
Geosciences, Multidisciplinary
Yue Liu, Emmanuel John M. Carranza, Qinglin Xia
Summary: This article introduces a special issue composed of 17 papers on the quantitative assessment and modeling of mineral resource potential. These papers cover various approaches to mineral resource assessment, including multivariate statistical analysis, fractal and multifractal modeling, geostatistical modeling, machine learning, mathematical morphology, and 3D mineral exploration. The papers can be grouped into three themes: multifractal theory, machine learning, and GIS-based 3D modeling. They either propose novel methods or demonstrate innovative applications of existing methods.
NATURAL RESOURCES RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Jiandong Zhang, Miao Yu, Hui Wang, Bin Li, Chengyou Feng, J. M. Dick, Jinchao Li, Huilei Kong, Zhiyi Zhao
Summary: Several magmatic Cu-Ni sulfide deposits have been discovered along the deep Middle Kunlun fault in Qinghai Province, NW China, showing a late Permian age compared to other deposits in the region. The mineralization is mainly hosted in specific rock types and related to slab-derived fluid input and dehydration melting.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Construction & Building Technology
Brett Bass, Leland Curtis, Joshua New, Stet Sanborn, Peter McNally
Summary: This paper introduces novel improvements to existing Design Space Exploration (DSE) workflows, allowing detailed performance analysis at a low cost and high speed. The proposed methodology, Universal Design Space Exploration (UDSE), enables a single pre-simulated design space to be applicable across multiple projects. The research showcases the feasibility and potential benefits of UDSE through its application in early conceptual energy modeling.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Geology
Chaobin Hu, Meng Li, Chengyou Feng, Xianfeng Zha, Xiaofeng Gao, Jie Meng
Summary: The Yugusayi mafic-ultramafic complex in the Qimantagh area of the East Kunlun orogenic belt is different from typical ophiolite suites due to its characteristically thermal emplacement and Cu-Ni sulphide mineralization. Zircon U-Pb dating and geochemical analysis indicate that the magma originated from depleted mantle and was contaminated by continental crust material. Considering the regional geological background, the rocks formed during the post-collision extension stage after the closure of the Proto-Tethys Ocean and the continental collision, representing an important metallogenic period for Cu-Ni sulphide deposits in the East Kunlun orogenic belt.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Victoria Tschirhart, Sally Pehrsson, Colin Card, Eric G. Potter, Jeremy Powell, Dinu Pana
Summary: Recent discoveries of basement-hosted uranium deposits in the Patterson Lake corridor in the southwestern Athabasca Basin of Canada have sparked strong interest in exploration in the region. New lithostratigraphic constraints, geochronology, and airborne geophysical surveys have greatly improved understanding of the host basement geology, leading to a re-examination of remote predictive mapping and geophysical responses of the buried basement rocks.
GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS
(2021)
Article
Geochemistry & Geophysics
M. Rabiei, G. Chi, E. G. Potter, V Tschirhart, C. MacKay, S. Frostad, R. McElroy, R. Ashley, B. McEwan
Summary: The study reveals that the uranium deposits in the Patterson Lake corridor exhibit similar ore fluid compositions and temperature-pressure conditions to typical URU deposits in the Athabasca Basin, suggesting that they were formed under comparable hydrothermal conditions. The episodic reactivation of basement faults played a significant role in drawing uraniferous fluids from the basin and reducing fluids from the basement to form deep basement-hosted deposits.
GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS
(2021)
Article
Geology
Andres F. Rodriguez-Corcho, Yamirka Rojas-Agramonte, Johana A. Barrera-Gonzalez, Maria P. Marroquin-Gomez, Sarah Bonilla-Correa, David Izquierdo-Camacho, Sofia M. Delgado-Balaguera, David Cartwright-Buitrago, Maria D. Munoz-Granados, William G. Caranton-Mateus, Alejandro Corrales-Garcia, Andres F. Laverde-Martinez, Aura Cuervo-Gomez, Marco A. Rodriguez-Ruiz, Juan P. Marin-Jaramillo, Nicole Salazar-Cuellar, Laura C. Esquivel-Arenales, Maria E. Daroca, A. Sofia Carvajal, Ana M. Perea-Pescador, Juan D. Solano-Acosta, Sergio Diaz, Alejandro Guillen, German Bayona, Agustin Cardona-Molina, Bruce Eglington, Camilo Montes
Summary: Geochronological databases, such as the Colombian Geochronological Database (CGD) presented in this contribution, are powerful tools for understanding the crustal evolution and age spectra of a region. By comparing different databases, temporal constraints on the evolution of the South American continent can be obtained, revealing both global and local geological events.
INTERNATIONAL GEOLOGY REVIEW
(2022)
Review
Geosciences, Multidisciplinary
Ake Johansson, Bernard Bingen, Hannu Huhma, Tod Waight, Rikke Vestergaard, Alvar Soesoo, Grazina Skridlaite, Ewa Krzeminska, Leonid Shumlyanskyy, Mark E. Holland, Christopher Holm-Denoma, Wilson Teixeira, Frederico M. Faleiros, Bruno Ribeiro, Joachim Jacobs, Chengcheng Wang, Robert J. Thomas, Paul H. Macey, Christopher L. Kirkland, Michael I. H. Hartnady, Bruce M. Eglington, Stephen J. Puetz, Kent C. Condie
Summary: This research compiles a large amount of magmatic U-Pb ages data from different blocks, revealing the temporal relationships and geological events among various blocks during the formation of Columbia and Rodinia. There is a certain degree of correlation between various blocks, but there are also significant differences.
PRECAMBRIAN RESEARCH
(2022)
Article
Geology
Luis A. Buatois, M. Gabriela Mangano, Bhawanisingh Desai, Noelia B. Carmona, Fiona Burns, Dean Meek, Bruce Eglington
Summary: This study compiles ichnological data from Middle Triassic to Late Jurassic shallow-marine siliciclastic units and finds that there was a significant increase in the utilization of infaunal ecospace during the Early Jurassic, followed by a plateau during the rest of the Jurassic. The study also reveals that the infaunal ecospace is partitioned into different tiers and multiple organisms were able to exploit the same resources. The increase in the number of ichnoguilds per community and per tier suggests that niche partitioning played a key role in the efficient use of infaunal ecospace and in driving alpha diversity.
Article
Geosciences, Multidisciplinary
V Tschirhart, E. G. Potter, J. W. Powell, E. A. Roots, J. A. Craven
Summary: Unconformity-related uranium deposits in the Athabasca Basin, Canada are the highest grade, large tonnage deposits in the world. Recent studies have shown that a deep heat source enhances hydrothermal fluid flow and the incursion of basinal brines along reactivated brittle shear zones. However, the spatial extent of the ore systems and the role of lower crustal features remain unresolved.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Jean-Christophe Wrobel-Daveau, Graeme Nicoll, Michael G. Tetley, Benjamin Greselle, Lucia Perez-Diaz, Andrew Davies, Bruce M. Eglington
Summary: The formulation of plate tectonic theory and its application in simulating the motion of lithospheric units has significantly advanced geosciences, supporting industry funded research, geological understanding, and resource exploration, with a growing importance in the current energy transition.
EARTH-SCIENCE REVIEWS
(2022)
Article
Energy & Fuels
Fateme Hormozzade Ghalati, James A. Craven, Dariush Motazedian, Stephen E. Grasby, Victoria Tschirhart
Summary: An audio-magnetotelluric (AMT) survey was conducted to explore shallow geothermal resources in the Garibaldi Volcanic Belt in Canada. The survey revealed complex 3-D subsurface structure, with high conductivity features related to hydrothermal alteration in the south and north regions. Clay cap layers connect to the surface, and conductive zones are located near warm springs along Meager Creek. Integrating the AMT model, geology, and temperature data is crucial for building a conceptual model of the Mount Meager geothermal system.
Article
Environmental Sciences
Victoria Tschirhart, Maurice Colpron, James Craven, Fateme Hormozzade Ghalati, Randy J. Enkin, Stephen E. Grasby
Summary: Sustainable development in Canada's North requires a focus on renewable, zero-emission energy sources. The study in Burwash Landing suggests potential for geothermal energy based on high geothermal gradient and proximity to active fault lines. Electromagnetic data inversion reveals vertical conductive structures associated with fluid-deposited graphite and hydrothermal alteration, indicating a possible heat source for sustaining a geothermal system in the region.
Article
Geochemistry & Geophysics
F. Hormozzade Ghalati, J. A. Craven, D. Motazedian, S. E. Grasby, E. Roots, V. Tschirhart, Z. Chen, X. Liu
Summary: In this study, the relationship between electrical resistivity and fluid flow in a geothermal reservoir was investigated by combining 3-D resistivity models derived from AMT data with rock properties and fluid sample data. The results showed that 3-D inversion of AMT data can map the fluid pathways at the study site, which are correlated with loss circulation zones in boreholes and can account for a porosity of up to 8.5% and a permeability of approximately 0.249 mD.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2023)
Article
Geochemistry & Geophysics
Xiaojun Liu, James A. A. Craven, Victoria Tschirhart
Summary: A data-driven mathematical method with a deep neural network was developed to estimate subsurface resistivity in magnetotelluric (MT) data analysis. The method showed reasonable accuracy and reliability in predicting resistivity models, demonstrating its potential application for real-world MT data.
Article
Geosciences, Multidisciplinary
Dwight C. Bradley, David A. D. Evans, Paul O'sullivan, Cliff D. Taylor, Bruce M. Eglington
Summary: This study reports detrital zircon data from two tectonic domains in Mauritania, covering Mesoproterozoic to Ordovician strata. The analysis reveals four distinctive detrital zircon age distributions, named as barcodes, in the Taoudeni Basin. The results also suggest a correlation between the Mauritanide orogen and the West African Craton based on the similarity of detrital zircon age spectra. Additionally, the study implies the existence of a continent-scale fluvial system that transported detritus to various regions, including the West African Craton.
AMERICAN JOURNAL OF SCIENCE
(2022)
Article
Geochemistry & Geophysics
Dillon D. Johnstone, Kathryn M. Bethune, Colin D. Card, Victoria Tschirhart
Summary: The Patterson Lake corridor in the Athabasca Basin is characterized by multiple basement-hosted uranium deposits and prospects. The area has undergone multiple phases of deformation and folding, resulting in complex structural features.
GEOCHEMISTRY-EXPLORATION ENVIRONMENT ANALYSIS
(2021)