| Organic substances in produced and formation water from unconventional natural gas extraction in coal and shale W Orem, C Tatu, M Varonka, H Lerch, A Bates, M Engle, L Crosby, ... International Journal of Coal Geology 126, 20-31, 2014 | 378 | 2014 |
| Radium content of oil-and gas-field produced waters in the Northern Appalachian Basin (USA): Summary and discussion of data EL Rowan, MA Engle, CS Kirby, TF Kraemer Scientific Investigations Report, i-31, 2011 | 292 | 2011 |
| Hydraulic fracturing water use variability in the U nited S tates and potential environmental implications TJ Gallegos, BA Varela, SS Haines, MA Engle Water resources research 51 (7), 5839-5845, 2015 | 288 | 2015 |
| Geochemical and isotopic evolution of water produced from Middle Devonian Marcellus shale gas wells, Appalachian basin, Pennsylvania EL Rowan, MA Engle, TF Kraemer, KT Schroeder, RW Hammack, ... Aapg Bulletin 99 (2), 181-206, 2015 | 205 | 2015 |
| Geochemistry of formation waters from the Wolfcamp and “Cline” shales: Insights into brine origin, reservoir connectivity, and fluid flow in the Permian Basin, USA MA Engle, FR Reyes, MS Varonka, WH Orem, L Ma, AJ Ianno, TM Schell, ... Chemical Geology 425, 76-92, 2016 | 192 | 2016 |
| Quantifying natural source mercury emissions from the Ivanhoe Mining District, north-central Nevada, USA MA Engle, MS Gustin, H Zhang Atmospheric Environment 35 (23), 3987-3997, 2001 | 192 | 2001 |
| Can we beneficially reuse produced water from oil and gas extraction in the US? BR Scanlon, RC Reedy, P Xu, M Engle, JP Nicot, D Yoxtheimer, Q Yang, ... Science of The Total Environment 717, 137085, 2020 | 175 | 2020 |
| Environmental signatures and effects of an oil and gas wastewater spill in the Williston Basin, North Dakota IM Cozzarelli, KJ Skalak, DB Kent, MA Engle, A Benthem, AC Mumford, ... Science of The Total Environment 579, 1781-1793, 2017 | 175 | 2017 |
| Geochemical evolution of produced waters from hydraulic fracturing of the Marcellus Shale, northern Appalachian Basin: A multivariate compositional data analysis approach MA Engle, EL Rowan International Journal of Coal Geology 126, 45-56, 2014 | 169 | 2014 |
| Wastewater disposal from unconventional oil and gas development degrades stream quality at a West Virginia injection facility DM Akob, AC Mumford, W Orem, MA Engle, JG Klinges, DB Kent, ... Environmental science & technology 50 (11), 5517-5525, 2016 | 164 | 2016 |
| Discharges of produced waters from oil and gas extraction via wastewater treatment plants are sources of disinfection by-products to receiving streams ML Hladik, MJ Focazio, M Engle Science of the Total Environment 466, 1085-1093, 2014 | 162 | 2014 |
| Atmospheric mercury emissions from mine wastes and surrounding geologically enriched terrains SM Gustin, M Coolbaugh, M Engle, B Fitzgerald, R Keislar, S Lindberg, ... Environmental Geology 43, 339-351, 2003 | 157 | 2003 |
| US Geological Survey national produced waters geochemical database (ver. 2.3, January 2018) MS Blondes, KD Gans, MA Engle, YK Kharaka, ME Reidy, ... US Geological Survey data release 10, F7J964W8, 2018 | 155 | 2018 |
| CO2, CO, and Hg emissions from the Truman Shepherd and Ruth Mullins coal fires, eastern Kentucky, USA JMK O'Keefe, KR Henke, JC Hower, MA Engle, GB Stracher, JD Stucker, ... Science of the Total Environment 408 (7), 1628-1633, 2010 | 138 | 2010 |
| Volatile-organic molecular characterization of shale-oil produced water from the Permian Basin NA Khan, M Engle, B Dungan, FO Holguin, P Xu, KC Carroll Chemosphere 148, 126-136, 2016 | 125 | 2016 |
| Mercury exchange between the atmosphere and low mercury containing substrates MS Gustin, M Engle, J Ericksen, S Lyman, J Stamenkovic, M Xin Applied Geochemistry 21 (11), 1913-1923, 2006 | 125 | 2006 |
| Gas emissions, minerals, and tars associated with three coal fires, Powder River Basin, USA MA Engle, LF Radke, EL Heffern, JMK O'Keefe, JC Hower, CD Smeltzer, ... Science of the total environment 420, 146-159, 2012 | 118 | 2012 |
| The influence of ozone on atmospheric emissions of gaseous elemental mercury and reactive gaseous mercury from substrates MA Engle, MS Gustin, SE Lindberg, AW Gertler, PA Ariya Atmospheric Environment 39 (39), 7506-7517, 2005 | 105 | 2005 |
| Mercury distribution in two Sierran forest and one desert sagebrush steppe ecosystems and the effects of fire MA Engle, MS Gustin, DW Johnson, JF Murphy, WW Miller, RF Walker, ... Science of the Total Environment 367 (1), 222-233, 2006 | 100 | 2006 |
| Comparison of atmospheric mercury speciation and deposition at nine sites across central and eastern North America MA Engle, MT Tate, DP Krabbenhoft, JJ Schauer, A Kolker, JB Shanley, ... Journal of Geophysical Research: Atmospheres 115 (D18), 2010 | 92 | 2010 |
Madalyn BlondesGeology, Energy & Minerals Science Center, U.S. Geological SurveyVerified email at usgs.gov