top of page

ON-LINE DATABASES

  • Blondes, MS, Gans, KD, Engle, MA, Kharaka, YK, Reidy, ME, Saraswathula, V, Thordsen, JJ, Rowan, EL, Morrissey, E, 2018. U.S. Geological Survey produced waters geochemical database, Version 2.3. https://doi.org/10.5066/F7J964W8

JOURNAL ARTICLES

  • ​Engle, MA, Chaput, J, 2023. Visualizing high dimensional structures in geochemical datasets using a combined compositional data analysis and Databionic swarm approach. International Journal of Coal Geology, 275, 104303. https://doi.org/10.1016/j.coal.2023.104303

  • Molofsky, SJ, Engle, MA, Wylie, AS, Wagner, TW, Connor, JA, 2023. Water of condensation: A source of late-stage produced water freshening in shale gas wells. AAPG Bulletin, 107, 629-641.

  • Goldrich-Middaugh, GM, Ma, L, Engle, MA, Ricketts, JW, Soto-Montero, P, Sullivan, PL, 2022. Regional drivers of stream chemical behavior: Leveraging lithology, land use, and climate gradients across the Colorado River, Texas USA. Water Resources Research, 58, e2022WR032155. https://doi.org/10.1029/2022WR032155

  • Engle, MA, Nye, CW, Neupane, G, Quillinan, SA, McLaughlin, JF, McLing, T, Martín-Fernández, JA, 2022. A machine learning approach to predicting rare earth element potential in produced and geothermal waters of the United States, Energies 15, 4555, 21 p. https://doi.org/10.3390/en15134555

  • McDevitt, B, Jubb, AM, Varonka, MS, Blondes, MS, Engle, MA, Gallegos. TJ. Shelton, JL, 2022. Dissolved organic matter within oil and gas associated wastewaters from U.S. unconventional petroleum plays: Comparisons and consequences for disposal and reuse.  Science of the Total Environment 838, 156331, 10 p. http://dx.doi.org/10.1016/j.scitotenv.2022.156331

  • Jiang, W, Xu, X, Hall, R, Zhang Y, Carroll, KC, Ramos, F, Engle, MA, Lin, L, Wang, H, Sayer, M, Xu, P, 2022. Characterization of produced water and surrounding surface water in the Permian Basin, the United States. Journal of Hazardous Materials 430, 128409, 13 p. https://doi.org/10.1016/j.jhazmat.2022.128409 

  • Ogbuji, B, Agwu Nnanna, AG, Engle, MA, Amesquita, R, 2022.  Compositional analysis and unconventional Permian Basin produced waters: A simple tool for predicting major ion composition. SPE Production and Operations, SPE-209599-PA.

  • Pingitore, NE, Jr., Engle, MA, 2022. Compositional closure - Its origin lies not in mathematics but rather in nature itself. Minerals 12, 74, 8p. https://doi.org/10.3390/min12010074

  • Xu, N, Xu, C, Finkelman, RB, Engle, MA, Li, Q, Peng, M, He, L, Huang, B, Yang, Y, 2022. Coal elemental (compositional) dat analysis with hierarchical clustering algorithms, International Journal of Coal Geology 249, 103892, 14p. doi:10.1016/j.coal.2021.103892

  • Shelton, JL, Jubb, AM, Saxe, SW, Attanasi, ED, Milkov, A, Engle, M, Freeman, PA, Shaffer, CA, Blondes, MS, 2021. Machine learning can accurately assigned geologic basin to produced water samples using major ion chemistry. Natural Resources Research 255, 17 p. doi: 10.1007/s11053-021-09949-8

  • Brantley, SL, Wen, T, Agarwal, DA, Catalano, JG, Schroeder, JG, Lehnert, K, Varadharajan, C, Pett-Ridge, J, Engle, M, Castronova AM, Hooper, RP, Ma, X, Jin, L, McHerny, K, Aronson, E, Shaughnessy, AR, Derry, LA, Richardson, J, Bales, J, Pierce, EM, 2021. The future low-temperature geochemical data-scape as envisioned by the U.S. geochemical community, Computers and Geosciences 157, 104933, 15 p. doi: 10.1016/j.cageo.2021.104933

  • Gallegos, TJ, Doolan, C, Caldwell, R, Engle, MA, Varonka, M, Birdwell, J, Jolly, G, Coplen, TB, Oliver, T., 2021. Insights on geochemical, isotopic, and volumetric compositions of produced water from hydraulically fractured Williston basin oil wells, Environmental Science and Technology 55, 10025-10034. doi: 10.1021/acs.est.0c06789

  • Cozzarelli, IM, Kent, DB, Briggs, M, Engle, MA, Benthem, A, Skalak, KJ, Mumford, AC, Jasechke, J, Farag, A, Lane, JW, Jr., Akob, DM, 2020. Geochemical indicators of oil and gas wastewater can trace potential exposure pathways following releases to surface waters, Science of the Total Environment, published on-line. doi: 10.1016/j.scitotenv.2020.142909

  • Blondes, MS, Shelton, JL, Engle, MA, Trembly, JP, Doolan, CA, Jubb, AM, Chenault, JC, Rowan, El, Haefner, RJ, Mailot, BE, 2020. Utica Shale Play oil and gas wastewater composition: Implications for treatment and reuse, Environmental Science and Technology 54, 13917–13925. doi:10.1021/acs.est.0c02461

  • Engle, MA, Doolan, CA, Pitman, JA, Varonka, MS, Chenault, J, Orem, WH, McMahon, PB, Jubb, AM, 2020. Origin and geochemistry of formation waters from the lower Eagle Ford group, Gulf Coast Basin, south central Texas, Chemical Geology, 550, 119754, 12 p. doi: 10.1016/j.chemgeo.2020.119754

  • Hron, K, Engle, MA, Filzmoser, P, Fišerová, E, 2020. Weighted symmetric pivot coordinates for compositional data with geochemical applications, Mathematical Geosciences, 20 p. DOI: 10.1007/s11004-020-09862-5. 

  • Scanlon, B, Reedy, RC, Xu, P, Engle, M, Nicot, JP, Yoxtheimer, D, Yang, Q, Ikonnikova, S, 2020. Can we beneficially reuse produced water from oil and gas extraction in the U.S.?, Science of the Total Environment, 717: 137085, 10. doi:1016/j.scitotenv.2020.137085

  • Jubb, AM, Engle, MA, Chenault, JM, Blondes, MS, Danforth, CG, Doolan, C, Gallegos, TJ, Mueller, D, Shelton, JL, 2020. Direct trace element determination in oil and gas produced waters with inductively coupled plasma – optical emission spectrometry (ICP-OES): Advantages of high salinity tolerance, Geostandards and Geoanalytical Research, 44, 385-397. doi:10.1111/ggr.12316 

  • Engle, MA, Brunner, B, 2019. Considerations in the application of machine learning to aqueous geochemistry: Origin of produced waters in the northern U.S. Gulf Coast Basin, Applied Computing & Geosciences, 3–4, 10 p. doi:10.1016/j.acags.2019.100012

  • Chaudhary, BK, Sabie, R, Engle, M, Willman, S, Xu, P, Carroll, KC, 2019. Produced water spatial variability and alternative-source water analysis applied to the Permian Basin, USA, Hydrogeology Journal, 17 p. https://doi.org/10.1007/s10040-019-02054-4

  • Martín-Fernández, JA, Engle, MA, Ruppert, LF, Olea, RA, 2018. Advances in self-organizing maps for their application to compositional data, Stochastic Environmental Research and Risk Assessment, 10 p. https://doi.org/10.1007/s00477-019-01659-1 

  • Tasker, TL, Burgos, WD, Ajemigbitse, MA, Lauer, NE, Gusa, AV, Kuatbek, M, May, D, Landis, JD, Alessi, DS, Johnsen, AM, Kaste, JM, Headrick, KL, Wilke, FDH, McNeal, M, Engle, M, Jubb, AM, Vidic, RD, Vengosh, A, Warner, NR, 2019. Accuracy of methods for reporting inorganic element concentrations and radioactivity in oil and gas wastewaters from the Appalachian Basin, U.S. based on an inter-laboratory comparison. Environmental Science: Processes & Impacts, 2(2), 75–18. http://doi.org/10.1039/C8EM00359A

  • Reyes, FR*, Engle, MA, Jin, L, Jacobs, MA, Konter, JG, 2018. Hydrogeochemical controls on brackish groundwater and its suitability for use in hydraulic fracturing: The Dockum Aquifer, Midland Basin, Texas, Environmental Geosciences, 25, 37–63. DOI: 10.1306/eg.01241817017 

  • O’Keefe, JMK, Neace, ER, Hammond, ML, Hower, JC, Engle, MA, East, J, Geboy, NJ, Olea, RA, Henke, KR, Copley, GC, Lemley, E, Nally, RSH, Hansen, AE, Richardson, AR, Satterwhite AB, Stracher, GB, Radke, LF, Smeltzer, C, Romanek, CR, Blake, DA, Schroder, PD, Emsbo-Mattingly, S, Stout, S, 2018.  Gas emissions, tars, and secondary minerals at the Ruth Mullins and Tiptop coal mine fires, International Journal of Coal Geology, 195, 304–316. DOI: 10.1016/j.coal.2018.06.012.

  • Fouskas, F, Ma, L, Engle, MA, Ruppert, L, Geboy, N, Costa, MA, 2018. Cadmium isotope fractionation during coal combustion: Insights from two U.S. coal-fired power plants, Applied Geochemistry, 96, 100-112. DOI: 10.1016/j.apgeochem.2018.06.007.

  • Shelton, JL, Engle, MA, Buccianti, A, Blondes, MS, 2018. The compositional nature of water chemistry: A proposed update to the Piper diagram, Journal of Geochemical Exploration 190, 130–141. DOI: 10.1016/j.gexplo.2018.03.003 

  • McMahon, PB, Barlow, JRB, Engle, MA, Belitz, K, Ging, PB, Hunt, AG, Kharaka, YK, Jurgens, BC, Tollett, RW, Kresse, TM, 2017, Methane and benzene in drinking-water wells overlying the Eagle Ford, Fayetteville, and Haynesville shales, Environmental Science and Technology 51, 6727–6734. DOI: 10.1021/acs.est.7b00746

  • Cozzarelli, IM, Skalak, KJ, Kent, DB, Engle, MA, Benthem, A, Mumford, AC, Haase, K, Farag, A, Harper, D, Nagel, SC, Iwanowicz, LR, Orem, WH, Jaeschke, JB, Galloway, J, Kohler, M, Stoliker, DL, Jolly, GD, 2017. Environmental signatures and effects of an oil and gas wastewater spill in the Williston Basin, North Dakota, Science of the Total Environment 579, 1781–1793. DOI: 10.1016/j.scitotenv.2016.11.157

  • Engel, JM, Ma, L, Sak, PB, Gaillardet, J, Ren, M, Engle, M, Brantley, SL, 2016. Quantifying chemical weathering rates along a precipitation gradient on Basse-Terre Island, French Guadeloupe: new insights from U-series isotopes in weathering rinds, Geochimica et Cosmochimica Acta 195, 29-67, DOI: 10.1016/j.gca.2016.08.040. 

  • Akob, DM, Mumford, AC, Cozzarelli, IM, Orem, W, Engle, MA, Klinges, JG, Kent, DB, 2016. Wastewater disposal from unconventional oil and gas development degrades stream quality at a West Virginia injection facility, Environmental Science and Technology 50, 5517–5525, DOI: 10.1021/acs.est.6b00428. 

  • Engle, MA, Reyes, FR*, Varonka, MS, Orem, WH, Ma, L, Ianno, AJ, Schell, TM, Xu, P, Carroll, KC, 2016. Geochemistry of formation waters from the Wolfcamp and “Cline” shales: Insights into brine origin, reservoir connectivity, and fluid flow in the Permian Basin, USA, Chemical Geology 425, 76-92, DOI: 10.1016/j.chemgeo.2016.01.025.  (Note: In the top 5 most downloaded articles for the journal, March 2016-April 2020)

  • Khan, NA, Engle, M, Dungan, B, Holguin, FO, Xu, P, Carroll, KC, 2016. Volatile-organic molecular characterization of shale-oil produced waters from the Permian Basin, Chemosphere 148, 126–136, DOI: 10.1016/j.chemosphere.2015.12.116.

  • Shanley, JB, Engle, M, Scholl, M, Krabbenhoft, DP, Brunette, R,, Olson, ML, 2015. High mercury wet deposition at a “clean air” site in Puerto Rico, Environmental Science and Technology 49, 12474−12482, DOI: 10.1021/acs.est.5b02430.

  • Gallegos, TJ, Varela, BA, Haines, SS, Engle, MA, 2015. Hydraulic fracturing water use variability in the United States and potential environmental implications, Water Resources Research 51, 5839–5845, 2015, 7 p., DOI: 10.1002/2015wr017278. (Note: In the top 5 most accessed articles for the journal throughout 2015 and 2016)

  • Kurth, L, Kolker, A, Engle, M, Geboy, N, Hendryx, M, Orem, W, McCawley, M, Crosby, L, Tatu, C, Varonka, M, DeVera, C, 2015. Atmospheric particulate matter in proximity to mountaintop coal mines: Environmental and human health impacts, Environmental Geochemistry and Health 37, 529–544, DOI: 10.1007/s10653-014-9669-5.

  • Levitan, DM, Zipper, CE, Donovan, P, Schreiber, ME, Seal, RR, II, Engle, MA, Chermak, JA, Bodnar, RJ, Johnson, DK, Aylor, JG, Jr., 2015. Statistical analysis of soil geochemical data to identify pathfinders elements associated with mineral deposits: an example from the Coles Hill uranium deposit, Virginia, USA, Journal of Geochemical Exploration 154, 238-251, DOI:10.1016/j.gexplo.2014.12.012. 

  • Swanson, SM, Mastalerz, MD, Engle, MA, Valentine, BJ, Warwick, PD, Hackley, PC, Belkin, HE, 2015. Pore characteristics of Wilcox Group coal samples, U.S. Gulf Coast Region: Implications for the occurrence of coalbed gas, International Journal of Coal Geology 139, 80-94, DOI: 10.1016/j.coal.2014.07.012.

  • Rowan, EL, Engle, MA, Kraemer, TF, Hammack, R, Schroeder, KT, 2015. Geochemical and isotopic evolution of water produced from Middle Devonian Marcellus Shale gas wells, Appalachian Basin, Pennsylvania, AAPG Bulletin 99, 181–206, DOI: 10.1306/07071413146.

  • Engle, MA, Gallo, M, Schroeder, KT, Geboy, NJ, Zupancic, JW, 2014. Three-way compositional analysis of water quality monitoring data, Environmental and Ecological Statistics 21, 565–581, DOI 10.1007/s10651-013-0268-x.

  • Borrok, DM, Engle, MA, 2014. The role of climate in increasing salt loads in dryland rivers, Journal of Arid Environments 111, 7–13.

  • Engle, MA, Blondes, MS, 2014. Linking compositional data analysis with thermodynamic geochemical modeling: Oilfield brines from the Permian Basin, USA, Journal of Geochemical Exploration 141, 61–70.

  • Soeder, DJ, Engle, ME, 2014. Environmental Geology and the Unconventional Gas Revolution: Introduction to the Special Issue, International Journal of Coal Geology 126, 1-3.

  • Orem, W, Tatu, C, Varonka, M, Lerch, H, Bates, A, Engle, M, Crosby, L, McIntosh, J, 2014. Organic substances in produced and formation water from unconventional natural gas extraction in coal and shale, International Journal of Coal Geology 126, 20–31. (Note: In the top 25most downloaded articles for 2014 in the topic of Geochemistry and Geophysics for all Elsevier journals)

  • Skalak, KJ, Engle, MA, Rowan, EL, Jolly, GD, Conko, KM, Benthem, AJ, Kraemer, TF, 2014. Surface disposal of produced waters in western and central Pennsylvania: Potential for accumulation of alkali-earth elements in sediments, International Journal of Coal Geology 126, 162–170.

  • Engle, MA, Rowan, EL, 2014. Geochemical evolution of fluids during flowback from hydraulic fracturing of the Marcellus Shale, northern Appalachian Basin: A multivariate compositional data analysis approach, International Journal of Coal Geology 126, 45–56. (Note: In the top 25 most downloaded articles for the journal between April 2014 and January 2015)

  • Sams, JI, Veloski, G, Smith, BD, Minsley, BJ, Engle, MA, Hammack, R, Zupancic, JW, 2014. Application of near-surface geophysics as part of a hydrologic study of a sub-surface drip irrigation system along the Powder River floodplain near Arvada, Wyoming, International Journal of Coal Geology 126, 128–139. 

  • Hladik, ML, Focazio, MJ, Engle, MA, 2014. Brominated disinfection by-products are environmental contaminants in surface waters associated with disposal of waters co-produced with hydrocarbons, Science of the Total Environment 466–467, 1085–1093.

  • Bern, CR, Boehlke, AR, Engle, MA, Geboy, NJ, Schroeder, KT, Zupancic, JW, 2013. Shallow groundwater and soil chemistry response to 3 years of subsurface drip irrigation using coalbed natural gas produced water, Hydrogeology Journal, 21: 1803–1820.

  • Kolker, A, Engle, MA, Peuker-Ehrenbrink, B, Geboy, NJ, Krabbenhoft, D, Bothner, MH, Tate, MT, 2013. Atmospheric mercury and fine particulate matter at Woods Hole, Cape Cod, Massachusetts: Implications for mercury and trace element sources in the northeastern United States, Atmospheric Environment 79, 760–768.

  • Geboy, NJ, Engle, MA, Hower, JC, 2013. Whole-coal versus ash basis in coal geochemistry: A mathematical approach to consistent interpretations, International Journal of Coal Geology, 113, 41–49.

  • Engle, MA, Olea, RA, O’Keefe, JMK, Hower, JC, Geboy, NJ, 2013. Direct estimation of diffuse gaseous emissions from coal fires: Current methods and future directions, International Journal of Coal Geology, 112, 164–172.

  • Geboy, NJ, Olea, RA, Engle, MA, Martín-Fernández, JA, 2013. Using simulated maps to interpret the geochemistry and formation of the Blue Gem Coal Bed, Kentucky, USA, International Journal of Coal Geology, 112, 26–35.

  • Swanson, SM, Engle, MA, Ruppert, LF, Jones, KB, Affolter, RH, 2013. Characterization of coal combustion products from coal-burning power plants utilizing high- and low-sulfur coals in the United States, International Journal of Coal Geology, 113, 116–126.

  • Engle, MA, Rowan, EL, 2013. Interpretation of Na-Cl-Br systematics in sedimentary basin brines: Comparison of concentration, element ratio, and isometric log-ratio approaches, Mathematical Geosciences, 45, 87–101. 

  • Engle, MA, Radke, L, Heffern, EL, O’Keefe, JMK, Hower, JC, Smeltzer, C, Hower, JM, Olea, R, Eatwell, R, Blake, DR, Emsbo-Mattingly, SD, Stout, SA, Queen, G, Aggen, K, Kolker, A,  Prakash, A, Henke, K, Stracher, GB, Schroeder, PA, Román-Colón, Y, ter Schure, A, 2012. Gas emissions, minerals, and tars associated with three coal fires in the Powder River Basin, USA, Science of the Total Environment, 420, 146-159.

  • Engle, MA, Radke, L, Heffern, EL, O’Keefe, JMK, Smeltzer, C, Hower, JC, Hower, JM, Prakash, A, Kolker, A, Eatwell, R, ter Schure, A, Queen, G, Aggen, K, Stracher, GB, Henke, K, Olea, R, Román-Colón, Y, 2011. Quantifying greenhouse emissions from coal fires using airborne and ground-based methods, International Journal of Coal Geology, 88, 147-151.

  • Engle, MA, Bern, CR, Healy, RW, Sams, JI, Zupancic, JW, Schroeder, KT, 2011. Tracking solutes and water from subsurface drip irrigation application of coalbed methane produced waters, Powder River Basin, Wyoming, Environmental Geosciences, 18, 169-187.

  • Engle, MA, Tate, MT, Krabbenhoft, DP, Schauer, JJ,  Kolker, A, Shanley, JB, Bothner, MH, 2010. Comparison of atmospheric mercury speciation and deposition at nine sites across central and eastern North America, Journal of Geophysical Research, 115, D18306, doi:10.1029/2010JD014064.

  • Kolker, A, Olson, ML, Krabbenhoft, DP, Tate, MT, Engle, MA,  2010. Patterns of mercury dispersion from local and regional emission sources: Atmospheric mercury speciation and fine particulate matter determined simultaneously at three sites in rural Central Wisconsin, USA, Atmospheric Chemistry and Physics, 10, 4467-4476.

  • O’Keefe, JMK, Henke, KR, Hower, JC, Engle, MA, Stracher, GB, Stucker, JD, Drew, JW, Staggs, WD, Murray, TM, Hammond, ML, III, Adkins, KD, Mullins, BJ, Lemley, EW, 2010.  CO2, CO, and Hg emission rates from the Truman Shepherd and Ruth Mullins coal fires, Eastern Kentucky, USA, Science of the Total Environment, 408, 1628-1633.

  • Kolker, A, Olson, ML, Krabbenhoft, DP, Tate, MT, Engle, MA,  2010. Patterns of mercury dispersion from local and regional emission sources: Atmospheric mercury speciation and fine particulate matter determined simultaneously at three sites in rural Central Wisconsin, USA, Atmospheric Chemistry and Physics Discussions, 10, 1823-1846.

  • Hower, JC, Henke, K, O’Keefe, JMK, Engle, MA, Stracher, GB, 2009.  The Tiptop coal mine fire, Kentucky: Preliminary investigation of the measurement of mercury and other hazardous gases from coal-fire gas vents, International Journal of Coal Geology, 80(1): 63-67.

  • Kolker, A, Engle, MA, Orem, WH, Bunnell, JE, Lerch, HE, Krabbenhoft, DP, Olson, ML, McCord, JD, 2008.  Mercury, trace elements, and organic constituents in atmospheric fine particulate matter, Shenandoah National Park, Virginia, USA: A combined approach to sampling and analysis, Geostandards and Geoanalytical Research, 32(3): 279-293.

  • Engle, MA, Goff, F, Jewett, DG, Reller, GJ, Bauman, JB, 2008. Application of environmental groundwater tracers at the Sulphur Bank Mercury Mine, California, USA, Hydrogeology Journal, 16(3):559-573.

  • Engle, MA, Tate, MT, Krabbenhoft, DP, Kolker, A, Olson, ML, Edgerton, ES, DeWild, JF, McPherson, AK, 2008.  Characterization and cycling of atmospheric mercury along the U.S. Gulf Coast, Applied Geochemistry, 23:419-437.

  • Gustin, MS, Engle, M, Ericksen, J, Lyman, S, Stamenkovic, J, Xin, M, 2006.  Mercury exchange between the atmosphere and low mercury containing substrates, Applied Geochemistry, 21:1913-1923.

  • Engle, MA, Gustin, MS, Goff, F, Janik, CJ, Counce, DA, Bergfeld, D, Rytuba, JJ, 2006 Atmospheric mercury emissions from substrate and fumaroles associated with three hydrothermal systems in the western United States: Yellowstone Caldera, Wyoming; Lassen Volcanic Center, California; and Dixie Valley, Nevada, Journal of Geophysical Research, 111: D17304, doi:10.1029/2005JD006563.

  • Engle, MA, Gustin, MS, Johnson, D, Murphy, JF, Miller, WW,  Walker, RF, Wright, J, Markee, M, 2006. Mercury distribution in two Sierran forest and one desert sagebrush steppe ecosystems and the effects of fire, Science of the Total Environment, 367:222-233.

  • Engle, MA, Gustin, MS, Lindberg, SE, Gertler, AW, Ariya, PA, 2005. The influence of ozone on atmospheric emissions of gaseous elemental mercury and reactive gaseous mercury from substrates, Atmospheric Environment, 39:7506-7517.

  • Nacht, DA, Gustin, MS, Engle, MA, Zehner, RZ, Giglini, AD, 2004.  Quantifying total and reactive gaseous mercury at the Sulphur Bank Mercury Mine Superfund Site, Northern California, Environmental Science & Technology, 38(7):1977-1983.

  • Gustin, MS, Coolbaugh, M, Engle, M, Fitzgerald, B, Keislar, R, Lindberg, S, Nacht, D, Quashnick, J, Rytuba, J, Sladek, C, Zhang, H, Zehner, R, 2004. Atmospheric mercury emissions from mine wastes and surrounding geologically enriched terranes, Environmental Geology, 43(3):339-351.

  • Engle, MA, Gustin, MS, 2002. Scaling up atmospheric mercury emissions from three naturally enriched areas: Flowery Peak, Nevada, Peavine Peak, Nevada and Long Valley Caldera, California, Science of the Total Environment, 290(1-3):91-104.

  • Engle, MA, Gustin, MS, Zhang, H, 2001. Quantifying natural source mercury emissions from the Ivanhoe Mining District, north-central Nevada, USA, Atmospheric Environment, 35:3987-3997.

BOOK CHAPTERS AND EXTENDED ABSTRACTS

  • McIntosh, JC, Engle, MA, Ferguson, G, Stotler, R. 2023. Geochemistry of groundwater (major and trace elements), Treatise of Geochemistry, 3rd edition, Elsevier, in review.

  • Engle, MA, 2022. Least mean squares. In: BS Daya Sugar, Q Cheng, J McKinley, F Agterberg (eds.), Encyclopedia of Mathematical Geosciences, Springer.  https://doi.org/10.1007/978-3-030-26050-7_178-1

  • Engle, MA, 2021. Least squares. In: BS Daya Sugar, Q Cheng, J McKinley, F Agterberg (eds.), Encyclopedia of Mathematical Geosciences, Springer.  https://doi.org/10.1007/978-3-030-26050-7_178-1

  • Engle, MA, and Chaput, JA, 2020. Groundwater origin determination in historic chemical datasets through supervised compositional data analysis: An analysis of Permian Basin brines. In: Filzmoser, Hron, K, P, Martín-Fernández, JA, Palarea-Albaladejo, J. (eds).  A Festschrift in Compositional Data Analysis, a tribute to the Career of Vera Pawlowsky-Glahn, in press. 

  • Kharaka, Y, Gans, K, Rowan, E, Thordsen, J, Conaway, C, Blondes, M, Engle, M, 2020. Chemical composition of formation water in shale and tight reservoirs: A basin-scale perspective in:  Dewers, T, Heath, J, Sanchez, M. (eds.), Shale: Subsurface Science and Engineering, American Geophysical Union Geophysical Monograph Series, Wiley, 27-43.

  • Kharaka, Y, Gans, K, Thordsen, J, Blondes, M, Engle, M, 2019. Geochemical data for produced waters from conventional and unconventional oil and gas wells: Results from Colorado, USA: Water-Rock Interaction 16, 6p. doi: 10.1051/e3sconf/20199803002.

  • Engle, MA, Buccianti, A, Olea, RA, Blondes, MS, 2017. Merging key concepts in the chemistry of natural waters with compositional data analysis: Updates to basic water quality plots in: the proceedings of CoDaWork 2017, 7th International Workshop on Compositional Data Analysis, Hron, K, Tolosana Delgado, R. (eds.), Abbadia San Salvatore, Italy, 47-55.

  • Blondes, MS, Craddock, WH, Shelton, JL, Engle, MA, 2017. Characterization of crustal gas systems using compositional data analysis of noble gas isotopes and gas compositions in: the proceedings of the CoDaWork 2017, 7th International Workshop on Compositional Data Analysis, ron, K, Tolosana Delgado, R. (eds.), Abbadia San Salvatore, Italy, 11–19.

  • Blondes, MS, Engle, MA, Geboy, NJ, 2016. A practical guide to the use of major elements, trace elements, and isotopes in compositional data analysis: Applications for deep formation brine geochemistry in: Compositional Data Analysis, Martín-Fernández, J. A. and Thió-Henestrosa S. (eds.), Springer, Springer Proceedings in Mathematics & Statistics, vol. 137, 13–29.

  • Blondes, MS, Engle, MA, Geboy, NJ, 2015. Advances in integrating isotopic data with compositional data analysis: Applications for deep formation brine geochemistry, in the proceedings of the 6th International Workshop on Compositional Data Analysis, Thió-Henestrosa S, Martín Fernández JA (eds.), Girona, Spain, 7 p.

  • Gallegos, TJ, Birdwell, JE, Bern, C, Haines, SS, Engle, M, 2015. The role of water in unconventional in-situ energy resource extraction technologies in: Ahuja, S (ed.), Food, Energy, and Water: The Chemistry Connection, Elsevier, p. 183-215.

  • Bern, CR, Engle, MA, Boehlke, AR, Zupancic, JW, 2013. Low salinity hydrocarbon water disposal through deep subsurface drip irrigation: Leaching of native selenium, in the proceedings for the 2013 International Mine Water Association Annual Conference, Brown A, Figueroa L, Wolkersdorfer Ch (eds.), Reliable Mine Water Technology (Vol II),  Golden, Colorado, 1187-1192.

  • Engle, MA, Martín-Fernández, JA, Geboy, NJ, Olea, RA, Peucker-Ehrenbrinck, B, Kolker, A, Krabbenhoft, DP, Lamothe, PJ, Bothner, MH, Tate, MT, 2011. Source apportionment of atmospheric trace gases and particulate matter: Comparison of log-ratio and traditional approaches, in the proceedings for the CoDaWork 2011, 4th International Conference on Compositional Data Analysis, Sant Feliu de Guixols, Spain, 11 p.

  • Engle, MA, Olea, RA, Hower, JC, Stracher, GB, Kolker, A, 2012.  Methods to quantify diffuse CO2 emissions from coal fires using unevenly distributed flux data, in Coal and Peat Fires: A Global Perspective, Volume 2, edited by Glenn B. Stracher, Anupma Prakash and Ellina V. Sokol (Elsevier), 24 slides, http://booksite.elsevier.com/9780444594129/downloads/usgs/mark_engle.pdf.

  • Sams, JI, Smith, BD, Veloski, G, Minsley, BJ, Engle, MA, Hammack, R, Zupancic, J, 2010.  Third year of subsurface drip irrigation monitoring using GEM2 electromagnetic surveys, Powder River Basin, Wyoming, in the Proceedings from the Symposium on Application of Geophysics to Engineering and Environmental Problems (SAGEEP), Keystone, CO, 11-15 April 2010, 9 p.

  • Kolker, A, Engle, M, Radke, L, Hower, J, O’Keefe, J, Heffern, E, ter Schure, A, Stracher, G, Prakash, A, Román-Colón,Y, Olea, R, 2009.  Measuring CO2 emissions from spontaneous coal fires in the U.S., Proceedings, Annual International Pittsburgh Coal Conference, Pittsburgh, PA, September, 2009, 7 p. [Honorable mention best technical paper, 2009 Conference].

  • Engle, MA, Gustin, MS, Goff, F, Janik, CJ, Counce, DA, Rytuba, JJ, 2004. Atmospheric mercury emissions from substrate and fumaroles associated with three hydrothermal systems in the western United States: Yellowstone Caldera, Wyoming; Lassen Volcanic Center, California; and Dixie Valley, Nevada, Proceedings from the 7th International Conference on Mercury as a Global Pollutant, June 24-July 2, Ljubljana, Slovenia, RMZ Materials and Geoenvironment, 51(2):1542-1545.

  • Engle, MA, Gustin, MS, Lindberg, SE, Gertler, AW, 2004. Investigation of the effect of tropospheric oxidants on Hg emissions from substrates, Proceedings from the 7th International Conference on Mercury as a Global Pollutant, June 24-July 2, Ljubljana, Slovenia, RMZ Materials and Geoenvironment, 51(2):1546-1549.

  • Engle, MA, Tempel, RN, Gustin, MS, 2000. Hydrogeochemistry of groundwaters associated with epithermal hot-spring-type Hg deposits, Proceedings from the Fifth International Conference on Acid Rock Drainage, Society for Mining, Metallurgy, and Exploration, 1:379-387.

REPORTS AND GOVERNMENT PUBLICATIONS

  • Engle, MA, Lewis, JM, 2022, Method development for the quantification of critical and valuable elements (CVE) in Permian Basin produced waters using Chelex-100 preconcentration, submitted to Pioneer Natural Resources, 19 p.

  • Hodges, DR, Engle, MA, Schober, GS, Chalil Madathil, S, Cappelle, MA, Cai, X, O’Connor, B, Finkenstadt, V, McClurkin Moore, J, 2021, NSF Convergence Accelerator: Sustainable systems enabling food security in extreme environments and food deserts employing a convergence of food, energy, water and systems for societal impact: Final Workshop Report, submitted to the National Science Foundation, 63 p.

  • Engle, MA, 2020, Production of minerals from Permian Basin produced waters: State of the Science, submitted to the Environmental Defense Fund, 19 p.

  • Shelton, JL, Andrews, RS, Akob, DM, DeVera, CA, Mumford, AC, Engle, M, Plampin, MR, and Brennan, ST, 2020, Compositional analysis of formation water geochemistry and microbiology of commercial and carbon dioxide-rich wells in the southwestern United States, U.S. Geological Survey Scientific Investigations Report 2020–5037, 26 p.

  • Engle, MA, Scott, DT, 2020, A review of U.S. Geological Survey work completed under the California Regional Groundwater Monitoring Program (RMP). Report submitted to the Western States Petroleum Association (contract PB1901- 03), 29 p.

  • Engle, MA, 2019, Predicting rare earth element potential in produced and geothermal waters of the United States: Application of emergent self-organizing maps, Chapter 6 in Assessing rare earth element concentrations in geothermal and oil and gas produced waters: A potential domestic source of strategic mineral commodities, Report submitted to the U.S. Dept. of Energy (Award DE-EE0007603), 31 p. https://gdr.openei.org/submissions/1125

  • Jubb, AM, McKinley, JC, Engle, MA, 2018, Comparative analysis of trace element quantification in produced waters via Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) versus Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES).  Report submitted to the Environmental Defense Fund, Technical Assistance Agreement 17-6080, 39 p. 

  • Haines, SS, Varela, BA, Hawkins, SJ, Gianoutsos, NJ, Thamke, JN, Engle, MA, Tennyson, ME, Schenk, CJ, Gaswirth, SB, Marra, KR, Kinney, SA, Mercier, TJ, and Martinez, CD, 2017, Assessment of water and proppant quantities associated with petroleum production from the Bakken and Three Forks Formations, Williston Basin Province, Montana and North Dakota, 2016, U.S. Geological Survey Fact Sheet 2017–3044, 4 p.

  • Healy, RW, Alley, WB, Engle, MA, McMahon, PB, and Bales, JD, 2015, The Energy-Water Nexus: An Earth-Science Perspective, U.S. Geological Survey Circular 1407, 108 p.

  • Engle, MA, Cozzarelli, I, Smith, BD, 2014. USGS investigations of waters produced with hydrocarbon development: Integrated research by the Energy and Minerals, and Environmental Health Mission Areas, U.S. Geological Survey Fact Sheet 2014–3104, 4 p. 

  • Haines, SS, Cook, TA, Thamke, JN, Davis, KW, Long, AJ, Healy, RW, Hawkins, SJ, Engle, MA, 2014. A framework for assessing water and proppant use and flowback water extraction associated with development of continuous petroleum resources, U.S. Geological Survey Fact Sheet 2014–3010, 6 p.

  • Rowan, EL, Engle, MA, Kraemer, T, Kirby, CS, 2011. Radium content of oil and gas field produced waters in the Northern Appalachian Basin: Summary of Data, U.S. Geological Survey Scientific Investigations Report 2011–5135, 31 p.

  • Geboy, NJ, Engle, MA, 2011. Quality assurance and quality control of geochemical data: A primer for the research scientist, U.S. Geological Survey Open-File Report 2011-1187, 28 p.

  • Geboy, NJ, Engle, MA,  Schroeder, KT, Zupancic, JW, 2011. Summary of inorganic compositional data for groundwater, soil-water, and surface-water samples at the Headgate Draw subsurface drip irrigation site, Johnson County, Wyoming, U.S. Geological Survey Data Series 619, 6 p.

  • Orem, W, Tatu, C, Pavlovic, N, Bunnell, J, Kolker, A, Engle, M, Stout, B, 2010. Health effects of energy resources, U.S. Geological Survey Fact Sheet 2009-3096.

  • Kolker, A, Engle, M, Stracher, G, Hower, J, Prakash, A, Radke, L, ter Schure, A, Heffern, E, 2009. Emissions from coal fires and their impact on the environment, U.S. Geological Survey Fact Sheet 2009-3084.

  • Engle, MA, Kolker, A, Mose, DE, East, JA, McCord, JD, 2008. Summary of mercury and trace element results in precipitation from the Culpeper, Virginia (VA-08) Mercury Deposition Network Site, 2002-2005, U.S. Geological Survey Open-File Report 2008-1232.

  • Kolker, A, Engle, MA, Krabbenhoft, DP, Olson, ML, 2007. Investigating atmospheric mercury with the U.S. Geological Survey mobile mercury laboratory, U.S. Geological Survey Fact Sheet 2007-3071.

bottom of page