Applying the Quadrant Method for Pumping-Trace Metal Correlations in Variable Time, Low-Data Systems

Zachary D Tomlinson, Kato T Dee, Megan E Elwood Madden, Andrew S Elwood Madden

Groundwater, vol. 63, Blackwell Publishing Ltd Malden, US, 2025, pp. 256--264

Characterizing ferrihydrite transformation products in near-saturated brine environments: Implications for Fe-oxide formation on Mars

Kaydra Barbre, Andrew Elwood Madden, Caitlin Hodges, Megan Elwood Madden

Journal of Geophysical Research: Planets, vol. 130, 2025, pp. e2024JE008650

Limited bioweathering by cyanobacteria in cold, nutrient-limited conditions: Implications for microbe-mineral interactions and aquatic chemistry in cold environments

Cansu Demirel-Floyd, Gerilyn S Soreghan, JG Floyd, ME Elwood Madden

Geomicrobiology Journal, vol. 41, Taylor \& Francis, 2024, pp. 672--690

Microscopic observations of smectite cation exchange in the absence of free water: implications for the evolution of Mars sediments

Christopher Geyer, Andrew S Elwood Madden, Preston R Larson, Megan Elwood Madden

Clays and Clay Minerals, vol. 72, Cambridge University Press Cambridge, UK, 2024, pp. e18

Assessing Weathering, Pedogenesis, and Silt Generation in Granitoid-Hosted Soils From Contrasting Hydroclimates

Alicia L Bonar, Gerilyn S Soreghan, Megan E Elwood Madden

Journal of Geophysical Research: Earth Surface, vol. 128, 2023, pp. e2023JF007095

The role of sulfate in cation exchange reactions: applications to clay--brine interactions on Mars

Christopher Geyer, Andrew S Elwood Madden, Andrew Rodriguez, Janice L Bishop, Daniel Mason, Megan Elwood Madden

The Planetary Science Journal, vol. 4, IOP Publishing, 2023, p. 48

Cyanobacterial weathering in warming periglacial sediments: Implications for nutrient cycling and potential biosignatures

Cansu Demirel-Floyd, Gerilyn S Soreghan, Megan E Elwood Madden

Permafrost and Periglacial Processes, vol. 33, 2022, pp. 63--77

Dissolution of Mn-bearing dolomite drives elevated Cr (vi) occurrence in a Permian redbed aquifer

Jeffrey P Westrop, Zachary D Tomlinson, Brandon M Maples, Kato T Dee, Andrew L Swindle, Megan E Elwood Madden, Qinhong Hu, Andrew S Elwood Madden

Environmental Science: Processes \& Impacts, vol. 24, Royal Society of Chemistry, 2022, pp. 2419--2436

Effects of mass wasting on the physiochemical properties of fluvial sediments in Puerto Rico following Hurricane Maria

NDS Webb, NR Regmi, GS Soreghan, AS Elwood Madden, J Sylvester, F Cartagena Colon, C Demirel-Floyd, ME Elwood Madden

Journal of Geophysical Research: Earth Surface, vol. 127, 2022, pp. e2021JF006509

Raman spectroscopic documentation of Mars analog basalt alteration by brines

Andrew Rodriguez, Lindsey Hunt, Charity Phillips-Lander, Daniel Mason, Megan Elwood Madden

Icarus, vol. 385, Academic Press, 2022, p. 115111

Raman spectroscopy of high salinity brines and ices

Daniel P Mason, Megan E Elwood Madden

Icarus, vol. 372, Academic Press, 2022, p. 114759

Significance of the terrestrial sink in the biogeochemical sulfur cycle

Young Ji Joo, Min Sub Sim, Megan E Elwood Madden, Gerilyn S Soreghan

Geophysical Research Letters, vol. 49, 2022, pp. e2021GL097009

Albite dissolution rates in brines: Implications for late-stage weathering on Mars

Charity M Phillips-Lander, Jamie L Miller, Megan Elwood Madden

Icarus, vol. 365, Academic Press, 2021, p. 114478

Raman Spectroscopy: Quantitative Analyses of Modern Brines on Mars

AJ Rodriguez, ME Elwood Madden, DP Mason

Brines in the Solar System: Modern Brines, vol. 2614, 2021, p. 6038

Siderite dissolution in Mars-analog Brines: Kinetics and reaction products

MD Cullen, CM Phillips-Lander, AS Elwood Madden, ME Elwood Madden

The Planetary Science Journal, vol. 2, IOP Publishing, 2021, p. 169

Aqueous alteration of pyroxene in sulfate, chloride, and perchlorate brines: Implications for post-Noachian aqueous alteration on Mars

Charity M Phillips-Lander, Andrew S Elwood Madden, Elisabeth M Hausrath, Megan E Elwood Madden

Geochimica et Cosmochimica Acta, vol. 257, Pergamon, 2019, pp. 336--353

Anomalously low chemical weathering in fluvial sediment of a tropical watershed (Puerto Rico)

Young Ji Joo, Megan E Elwood Madden, Gerilyn S Soreghan

Geology, vol. 46, GeoScienceWorld, 2018, pp. 691--694

Carbonate dissolution rates in high salinity brines: Implications for post-Noachian chemical weathering on Mars

Charity M Phillips-Lander, SR Parnell, LE McGraw, ME Elwood Madden

Icarus, vol. 307, Academic Press, 2018, pp. 281--293

Jarosite dissolution rates in perchlorate brine

Carey Legett IV, Brittany N Pritchett, Andrew S Elwood Madden, Charity M Phillips-Lander, Megan E Elwood Madden

Icarus, vol. 301, Academic Press, 2018, pp. 189--195

Measuring perchlorate and sulfate in planetary brines using raman spectroscopy

Lauren E McGraw, Nina DS McCollom, Charity M Phillips-Lander, Megan E Elwood Madden

ACS Earth and Space Chemistry, vol. 2, American Chemical Society, 2018, pp. 1068--1074

Quantification of particle shape by an automated image analysis system: A case study in natural sediment samples from extreme climates

Young Ji Joo, Anastasia M Soreghan, Megan E Elwood Madden, Gerilyn S Soreghan

Geosciences Journal, vol. 22, The Geological Society of Korea Seoul, 2018, pp. 525--532

Can we use pyroxene weathering textures to interpret aqueous alteration conditions? Yes and No

Charity M Phillips-Lander, Carey Legett, Andrew S Elwood Madden, Megan E Elwood Madden

American Mineralogist, vol. 102, De Gruyter, 2017, pp. 1915--1921

Chemical weathering trends in fine-grained ephemeral stream sediments of the McMurdo Dry Valleys, Antarctica

Kristen R Marra, Megan E Elwood Madden, Gerilyn S Soreghan, Brenda L Hall

Geomorphology, vol. 281, Elsevier, 2017, pp. 13--30

Considering the formation of hematite spherules on Mars by freezing aqueous hematite nanoparticle suspensions

MR Sexton, ME Elwood Madden, AL Swindle, VE Hamilton, BR Bickmore, AS Elwood Madden

Icarus, vol. 286, Academic Press, 2017, pp. 202--211

Alunite dissolution rates: Dissolution mechanisms and implications for Mars

JL Miller, AS Elwood Madden, CM Phillips-Lander, BN Pritchett, ME Elwood Madden

Geochimica et Cosmochimica Acta, vol. 172, Pergamon, 2016, pp. 93--106

Chemical and physical weathering in a hot-arid, tectonically active alluvial system of Anza Borrego Desert, California

Young Ji Joo, Megan E Elwood Madden, Gerilyn S Soreghan

Sedimentology, vol. 63, 2016, pp. 1065--1083

Dissolution of nontronite in chloride brines and implications for the aqueous history of Mars

MH Steiner, EM Hausrath, ME Elwood Madden, O Tschauner, BL Ehlmann, AA Olsen, SR Gainey, JS Smith

Geochimica et Cosmochimica Acta, vol. 195, Pergamon, 2016, pp. 259--276

Silt production as a function of climate and lithology under simulated comminution

Gerilyn S Soreghan, Young Ji Joo, Megan E Elwood Madden, Sarah C Van Deventer

Quaternary International, vol. 399, Pergamon, 2016, pp. 218--227

Assessing hydrodynamic effects on jarosite dissolution rates, reaction products, and preservation on Mars

Emily M Dixon, Andrew S Elwood Madden, Elisabeth M Hausrath, Megan E Elwood Madden

Journal of Geophysical Research: Planets, vol. 120, 2015, pp. 625--642

BET surface area distributions in polar stream sediments: Implications for silicate weathering in a cold-arid environment

Kristen R Marra, Megan E Elwood Madden, Gerilyn S Soreghan, Brenda L Hall

Applied Geochemistry, vol. 52, Pergamon, 2015, pp. 31--42

Dynamic interplay between uranyl phosphate precipitation, sorption, and phase evolution

P Sumudu Munasinghe, Megan E Elwood Madden, Scott C Brooks, Andrew S Elwood Madden

Applied Geochemistry, vol. 58, Pergamon, 2015, pp. 147--160

CO2 hydrate formation and dissociation rates: Application to Mars

Dan Ambuehl, Megan Elwood Madden

Icarus, vol. 234, Academic Press, 2014, pp. 45--52

Corrigendum to “Jarosite dissolution rates and maximum lifetimes in high salinity brines: Implications for Earth and Mars”[Earth Planet. Sci. Lett. 357--358 (2012) 327--336]

BN Pritchett, ME Elwood Madden, AS Madden

Earth and Planetary Science Letters, vol. 391, Elsevier, 2014, pp. 67--68

Trends in grain size and BET surface area in cold--arid versus warm--semiarid fluvial systems

Kristen R Marra, Gerilyn S Soreghan, Megan E Elwood Madden, Leslie J Keiser, Brenda L Hall

Geomorphology, vol. 206, Elsevier, 2014, pp. 483--491

Effect of fly ash on the behavior of expansive soils: microscopic analysis

Botao Lin, Amy B Cerato, Andrew S Madden, MEGAN E ELWOOD MADDEN

Environmental \& Engineering Geoscience, vol. 19, EEGS 1720 South Bellaire, Suite 110, Denver, CO 80222-4303, USA, 2013, pp. 85--94

Effects of arsenic incorporation on jarosite dissolution rates and reaction products

Matthew R Kendall, Andrew S Madden, Megan E Elwood Madden, Qinhong Hu

Geochimica et Cosmochimica Acta, vol. 112, Pergamon, 2013, pp. 192--207

Na-jarosite dissolution rates: The effect of mineral composition on jarosite lifetimes

Shayda K Zahrai, Megan E Elwood Madden, Andrew S Madden, J Donald Rimstidt

Icarus, vol. 223, Academic Press, 2013, pp. 438--443

Volatile trapping in Martian clathrates

Olivier Mousis, Eric Chassefi{\`e}re, J{\'e}r{\'e}mie Lasue, Vincent Chevrier, Megan E Elwood Madden, Azzedine Lakhlifi, Jonathan I Lunine, Franck Montmessin, Sylvain Picaud, Fr{\'e}d{\'e}ric Schmidt, others

Space Science Reviews, vol. 174, Springer Netherlands Dordrecht, 2013, pp. 213--250

Glacier meltwater stream chemistry in Wright and Taylor Valleys, Antarctica: significant roles of drift, dust and biological processes in chemical weathering in a polar climate

AR Stumpf, ME Elwood Madden, GS Soreghan, BL Hall, LJ Keiser, KR Marra

Chemical Geology, vol. 322, Elsevier, 2012, pp. 79--90

Interpreting temperature--strain data from mesoscale clathrate experiments

John R Leeman, Claudia J Rawn, S Ulrich, M Elwood Madden, Tommy Joe Phelps

Computers \& geosciences, vol. 38, Pergamon, 2012, pp. 62--67

Jarosite dissolution rates and maximum lifetimes in high salinity brines: Implications for Earth and Mars

BN Pritchett, ME Elwood Madden, AS Madden

Earth and Planetary Science Letters, vol. 357, Elsevier, 2012, pp. 327--336

Jarosite dissolution rates and nanoscale mineralogy

ME Elwood Madden, AS Madden, JD Rimstidt, S Zahrai, MR Kendall, MA Miller

Geochimica et Cosmochimica Acta, vol. 91, Pergamon, 2012, pp. 306--321

Kinetics of methane clathrate formation and dissociation under Mars relevant conditions

SR Gainey, ME Elwood Madden

Icarus, vol. 218, Academic Press, 2012, pp. 513--524

Laboratory-simulated diagenesis of nontronite

Matthew A Miller, Andrew S Madden, Megan Elwood Madden, R Douglas Elmore

Clays and clay minerals, vol. 60, Cambridge University Press \& Assessment, 2012, pp. 616--632

Potential effects of obliquity change on gas hydrate stability zones on Mars

Margaret J Root, Megan E Elwood Madden

Icarus, vol. 218, Academic Press, 2012, pp. 534--544

Fiber optic sensing technology for detecting gas hydrate formation and decomposition

Claudia J Rawn, John R Leeman, Shannon M Ulrich, Jonathan E Alford, Tommy Joe Phelps, Megan Elwood Madden

Review of Scientific Instruments, vol. 82, AIP Publishing, 2011

Reduced sulfur--carbon--water systems on Mars may yield shallow methane hydrate reservoirs

ME Elwood Madden, JR Leeman, MJ Root, S Gainey

Planetary and Space Science, vol. 59, Pergamon, 2011, pp. 203--206

Low-temperature mechanism for formation of coarse crystalline hematite through nanoparticle aggregation

AS Madden, VE Hamilton, ME Elwood Madden, PR Larson, MA Miller

Earth and Planetary Science Letters, vol. 298, Elsevier, 2010, pp. 377--384

Experimental formation of massive hydrate deposits from accumulation of CH4 gas bubbles within synthetic and natural sediments

Megan Elwood Madden, Shannon Ulrich, Phillip Szymcek, Scott McCallum, Tommy Phelps

Marine and Petroleum Geology, vol. 26, Elsevier, 2009, pp. 369--378

How long was Meridiani Planum wet? Applying a jarosite stopwatch to determine the duration of aqueous diagenesis

Megan E Elwood Madden, Andrew S Madden, J Donald Rimstidt

Geology, vol. 37, Geological Society of America, 2009, pp. 635--638

New course develops student expertise in geoscience writing

Katie Shearer, Megan E Elwood Madden, R Douglas Elmore, Rhonda Kyncl, Michele Eodice

Geol Soc Am Abstr Progr, vol. 41, 2009, p. 155

Application of fiber optic temperature and strain sensing technology to gas hydrates

Shannon M Ulrich, Megan E Elwood Madden, Claudia J Rawn, Phillip Szymcek, Tommy Joe Phelps

Proceedings of the 6th International Conference on Gas Hydrates, Vancouver, Canada, 2008

Estimating Duration of Diagenesis at Meridiani Planum from Jarosite Dissolution Rates

Megan E ELWOOD MADDEN, S Andrew, J Donald RIMSTIDT

2008 Joint Meeting of The Geological Society of America, Soil Science Society of America, American Society of Agronomy, Crop Science Society of America, Gulf Coast Association of Geological Societies with the Gulf Coast Section of SEPM, 2008

Salinity-induced hydrate dissociation: A mechanism for recent CH4 release on Mars

ME Elwood Madden, Shannon M Ulrich, TC Onstott, Tommy Joe Phelps

Geophysical research letters, vol. 34, 2007

Lifetime of Jarosite on Mars: Preliminary Estimates

ME Elwood Madden, JD Rimstidt

Workshop on Martian Sulfates as Recorders of Atmospheric-Fluid-Rock Interactions, vol. 1331, 2006, p. 36

Shock reequilibration of fluid inclusions in Coconino sandstone from Meteor Crater, Arizona

Megan E Elwood Madden, David A Kring, Robert J Bodnar

Earth and Planetary Science Letters, vol. 241, Elsevier, 2006, pp. 32--46

Shock re-equilibration of fluid inclusions in crystalline basement rocks from the Ries crater, Germany

Megan E Elwood Madden, David A Kring, Robert J Bodnar

Meteoritics \& Planetary Science, vol. 41, Blackwell Publishing Ltd Oxford, UK, 2006, pp. 247--262

Fluids in planetary systems

Megan E Elwood Madden

Virginia Polytechnic Institute and State University, 2005

Magnetic Characteristics of Metal-doped Magnetite Nanoparticles Produced by Thermoanaerobacter Ethanolicus

Lucas W Yeary, Tommy J Phelps, Lonnie J Love, J Moon, Adam J Rondinone, Claudia J Rawn, James R Thompson, Andrew S Madden, Megan E Madden

AGU Fall Meeting Abstracts, vol. 2005, 2005, pp. B31C--1002

Experimental simulation of shock-induced re-equilibration of fluid inclusions

Megan E Elwood Madden, Friedrich Horz, Robert J Bodnar

The Canadian Mineralogist, vol. 42, Mineralogical Association of Canada, 2004, pp. 1357--1368

Jarosite as an indicator of water-limited chemical weathering on Mars

ME Elwood Madden, RJ Bodnar, JD Rimstidt

Nature, vol. 431, Nature Publishing Group UK London, 2004, pp. 821--823