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Mark Engle results 13 · Newest (Page 1/1, per page 25)
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Predicting the Concentrations of Rare Earth Elements and Yttrium in Coal Using Self-Organizing MapNARA Subscribed
Natural Resources Research · 2025 · Vol. 34 · Issue 3 · Springer
Na Xu; Fei Li; Wei Zhu; Mark A. Engle; Jiapei Kong; Pengfei Li; Qingfeng Wang; Lishan Shen; Robert B. Finkelman; Shifeng Dai
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Intelligent identification of coal macerals using improved semi-supervised semantic segmentation methodsNARA Subscribed
International Journal of Coal Geology · 2025 · Vol. 300 · Elsevier
Na Xu; Qingfeng Wang; Pengfei Li; Jiapei Kong; Qing Li; Mark A. Engle; James C. Hower; Wei Zhu
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Visualizing high dimensional structures in geochemical datasets using a combined compositional data analysis and Databionic swarm approachNARA Subscribed
International Journal of Coal Geology · 2023 · Vol. 275 · Elsevier
Mark A. Engle; Julien Chaput
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Modes of occurrence of elements in high-germanium coals using correlation analysis algorithmNARA Subscribed
Applied Geochemistry · 2023 · Vol. 152 · Pergamon
Na Xu; Wei Zhu; Bin Huang; Mark A. Engle; Qiang Li; Robert B. Finkelman
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Machine Learning Can Assign Geologic Basin to Produced Water Samples Using Major Ion GeochemistryNARA Subscribed
Natural Resources Research · 2021 · Vol. 30 · Issue 6 · Springer
Jenna L. Shelton; Aaron M. Jubb; Samuel W. Saxe; Emil D. Attanasi; Alexei V. Milkov; Mark Engle; Philip A. Freeman; Christopher A. Shaffer; Madalyn S. Blondes
Understanding the geochemistry of waters produced during petroleum extraction is essential to informing the best treatment and reuse options, which can potentially be optimized for a given geologic basin. Here, we used the US Geological Survey’s National Produced Waters Geochemical Database (PWGD) to determine if major ion chemistry could be used to classify accurately a produced water sample to a given geologic basin based on...
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Weighted Symmetric Pivot Coordinates for Compositional Data with Geochemical ApplicationsNARA Subscribed
Mathematical Geosciences · 2021 · Vol. 53 · Issue 4 · Springer
Karel Hron; Mark Engle; Peter Filzmoser; Eva Fišerová
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Spatial variability of produced-water quality and alternative-source water analysis applied to the Permian Basin, USANARA Subscribed
Hydrogeology Journal · 2019 · Vol. 27 · Issue 8 · Springer
Binod K. Chaudhary; Robert Sabie; Mark A. Engle; Pei Xu; Spencer Willman; Kenneth C. Carroll
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Advances in self-organizing maps for their application to compositional dataNARA Subscribed
Stochastic Environmental Research and Risk Assessment · 2019 · Vol. 33 · Issue 3 · Springer
Josep A. Martín-Fernández; Mark A. Engle; Leslie F. Ruppert; Ricardo A. Olea
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Atmospheric particulate matter in proximity to mountaintop coal mines: sources and potential environmental and human health impactsNARA Subscribed
Environmental Geochemistry and Health · 2015 · Vol. 37 · Issue 3 · Springer
Laura Kurth; Allan Kolker; Mark Engle; Nicholas Geboy; Michael Hendryx; William Orem; Michael McCawley; Lynn Crosby; Calin Tatu; Matthew Varonka; Christina DeVera
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Three-way compositional analysis of water quality monitoring dataNARA Subscribed
Environmental and Ecological Statistics · 2014 · Vol. 21 · Issue 3 · Springer
Mark A. Engle; Michele Gallo; Karl T. Schroeder; Nicholas J. Geboy; John W. Zupancic
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Interpretation of Na–Cl–Br Systematics in Sedimentary Basin Brines: Comparison of Concentration, Element Ratio, and Isometric Log-ratio ApproachesNARA Subscribed
Mathematical Geosciences · 2013 · Vol. 45 · Issue 1 · Springer
Mark A. Engle; Elisabeth L. Rowan
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Application of environmental groundwater tracers at the Sulphur Bank Mercury Mine, California, USANARA Subscribed
Hydrogeology Journal · 2008 · Vol. 16 · Issue 3 · Springer
Mark A. Engle; Fraser Goff; David G. Jewett; Gregory J. Reller; Joel B. Bauman
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Development of a Grassland Integrity Index Based on Breeding Bird AssemblagesNARA Subscribed
Environmental Monitoring and Assessment · 2006 · Vol. 118 · Issue 1-3 · Springer
Bryan R. Coppedge; David M. Engle; Ronald E. Masters; Mark S. Gregory
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