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Journal articles published or accepted (Article with student authors *)

43) White, A., Ma, L., Moravec, B., Chorover, J., and McIntosh, J. (2021), U-series and Sr isotopes as tracers of mineral weathering and water routing from the deep Critical Zone to streamflow in a high elevation volcanic catchment. Chemical Geology, Under revision.

42) Garcia, V.*, Ma, L., Ricketts, J., and Dosseto, A. (2021), Record of Neotectonics and Deep Crustal Fluid Circulation Along the Santa Fe Fault Zone in Travertine Deposits of the Lucero Uplift, New Mexico, USA. Geochemistry, Geophysics, Geosystems. Under revision.

41) Garcia S*, Louvat P, Gaillardet J, Nyachoti S*, and Ma L (2021), Combining Uranium, Boron, and Strontium Isotope Ratios (234U/238U, d11B, 87Sr/86Sr) to Trace and Quantify Salinity Contributions to Rio Grande River in Southwestern United States. Front. Water 2:575216. doi: 10.3389/frwa.2020.575216

40) Rea*, P., Ma, L., Gill, T.E., Gardea-Torresdey, J., Tamez, C., Jin, L. (2020), Tracing gypsiferous White Sands aerosols in the shallow critical zone in the northern Sacramento Mountains, New Mexico using Sr/Ca and 87Sr/86Sr ratios, Geoderma, 372, 114387. 

39) Guo*, J., Ma, L., Gaillardet, J., Sak, P., Pereyra*, Y., Engel*, J. (2020), Reconciling chemical weathering rates across scales: Application of Uranium-series isotope systematics in volcanic weathering clasts from Basse-Terre Island (French Guadeloupe), Earth and Planetary Science Letters, 530, 115874. 

38) Voll*, K., Davidson, G., Borrok, D., Corcoran, M., Kelley, J., Ma, L. (2019), Variable pathways, residence time, and geochemical evolution of seepage beneath the Mississippi River levee during the 2011, 2015, and 2016 floods. Applied Geochemistry, 108, 104367.

37) Ricketts, J.W., Ma, L., Wagler, A., and Garcia*, V. (2019), Global travertine deposition modulated by changes in global climate. Journal of Quaternary Science, in press. 

36) Ma, L., Dosseto, A., Gaillardet, J., Sak, P., and Brantley, S.L. (2019), Quantifying weathering rind formation rates by in situ measurements of U-series disequilibria with laser ablation (LA) MC-ICPMS. Geochimica et Cosmochimica Acta, 247, 1-26.


35) Sak, P., Murphy, M., Ma, L., Gaillardet, J., Herndon, E.M., Brantley,, S.L., and Daniel, C. (2018), From unweathered core to regolith in a single weathering andesitic clast: rates and trends of in situ chemical weathering on a tropical volcanic island (Basse Terre Island, French Guadeloupe). Chemical Geology, 498, 17-30.  


34) Coyte, RM, Jain, RC, Srivastava, SK, Sharma, KC, Khalil, A, Ma, L., Vengosh, A (2018). Large-Scale Uranium Contamination of Groundwater Resources in India. Environmental Science&Technology Letters. Doi: 10.1021/acs.estlett.8b00215.

33) Fouskas, F.*, Ma, L., Engle, M., Ruppert, L., Geboy, N., Costa, M.* (2018), Cadmium isotope fractionation during coal combustion: insights from two coal-fired power plants in the United States. Applied Geochemistry 96, 100-112.

32) Hiebing, M.*, Doser, D. I., Avila, V.*, Ma, L. (2018), Geophysical studies of fault and bedrock control on groundwater geochemistry within the southern Mesilla Basin, west Texas and southern New Mexico. Geosphere, Doi:10.1130/GES01567.1.


31) Cox, C.*, Jin, L., Ganjegunte, G., Borrok, D., Lougheed, V. L., Ma, L., (2018). Changes of soil quality due to flood irrigation in agricultural fields along the Rio Grande in western Texas. Applied Geochemistry 90, 87-100.


30) Nyachoti, S. *, Jin, L., Tweedie, C., and Ma, L. (2017), Insight into factors controlling formation rates of pedogenic carbonates: a combined geochemical and isotopic approach in dryland soils of the US southwest. Chemical Geology, doi:10.1016/j.chemgeo.2017.10.014.


29) Jin, L., Ma, L., Dere, A., White, T., Mathur, M., and Brantely, S. (2017), REE mobility and fractionation during shale weathering along a climate gradient. Chemical Geology 466, 352-379.   


28) Wymore, A., West, N., Maher, K., Sullivan, P., Harpold, A., Karwan, D., Marshall, J., Perdrial, J., Rempe, D., Ma, L., (2017), Growing new generations of critical zone scientists. ESEX Commentary. Earth Surface Process and Landforms, doi:10.1002/esp.4196. 


27) Engel, J.*, Ma, L., P. Sak, J. Gaillardet, M. Ren, M. Engle, S. Brantley (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 Cosmochimica Acta 195, 29-67.


26) Yamaokaa, K., Ma, L., Hishikawac, K., Usuia, A. (2016), Geochemistry and U-series dating of Holocene and fossil marine hydrothermal manganese deposits from the Izu-Ogasawara arc. Ore Geology Reviews, doi:10.1016/j.oregeorev.2016.07.025.


25) Sullivan, P., Ma, L., West, N., Jin, L., Karwan, D., Steinhoefel, G., Brantley, S. (2016). CZ-tope at Susquehanna Shale Hills CZO: Testing multiple isotope proxies to elucidate Critical Zone processes. Chemical Geology, DOI: 10.1016/j.chemgeo.2016.05.012.


24) Huckle, D*., Ma, L., McIntosh, J., Vazques-Ortega, A., Rasmussen, C., Chorover, J. (2016), Characterizing U-series isotope signatures in soils and headwater streams in a complex volcanic terrain. Chemical Geology, 445, 68-83. 


23) Engle, M., Reyes, F.*, Varonka, M., Orem, W., Ma, L., Ianno, A., Schell, T., Xu, P., Carroll, K., (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.


22) Ma, L., Teng, F.-Z., Ke, S., Yang, W., Jin, L., Brantley, S., (2015). Mg isotope fractionation during shale weathering in the Shale Hills Critical Zone Observatory: accumulation of light Mg isotopes in soils by clay mineral transformation. Chemical Geology, 397, 37-50.


21) Lebedeva, M., Sak, P., Ma, L., Brantley, S., (2015). Using a mathematical model of a weathering clast to explore the effects of curvature on weathering. Chemical Geology, 404, 88-99.


20) Finlayson, V.*, Konter, J., Ma, L., (2015). The importance of a Ni correction with ion counter in the AQ8 double spike analysis of Fe isotope compositions using a 57Fe/58Fe double spike. Geochem. Geophys. Geosyst. 16, 4209–4222, DOI:10.1002/2015GC006012.


19) Szynkiewicz, A., Borrok, D., Ganjegunte, G., Skrzypek, G., Ma, L., Rearick, M., Perkins, G., (2015). Isotopic studies of the Upper and Middle Rio Grande. Part 2 – Salt loads and human impacts in south New Mexico and west Texas. Chemical Geology 411, 336-350.


18) Ma, L., Konter, J., Sanchez, D.*, Herndon, E., Jin, L., Brantley, S. (2014), Quantifying the signature of the industrial revolution from Pb concentrations and isotopes in Pennsylvania soils. Anthropocene 7, 16-29.


17) Rocha, C.*, Peterson, J., Jalandoni, A., Chianelli, R. R., Ma, L., (2014). Paleoenvironmental investigations, chemical analysis and characterization of underwater strata of Marigondon Cave. Quaternary International.


16) Jin, L., Ogrinc, N., Yesavage, T., Hasenmueller, E. A., Ma, L., Sullivan, P. L., Kaye, J., Duffy, C., Brantley, S. L., (2014). The CO2consumption potential during gray shale weathering: Insights from the evolution of carbon isotopes in the Susquehanna Shale Hills critical zone observatory. Geochimica et Cosmochimica Acta, 142, 260–280.


15) Ma, L., Chabaux, F., West, N., Kirby, E., Jin, L., Brantley, S., (2013). Regolith production and transport in the Susquehanna Shale Hills Critical Zone Observatory, Part 1: Insights from U-series isotopes. Journal of Geophysical Research: Earth Surface, 118, 722-740.


14) West, N., Kirby, E., Bierman, P., Slingerland, R., Ma, L., Rood, D., Brantley, S., (2013). Regolith production and transport at the Susquehanna Shale Hills Critical Zone Observatory, Part 2: Insights from meteoric 10Be. Journal of Geophysical Research: Earth Surface, 118, 1-20.


13) Chabaux, F., Blaes, E., Stille, P., Roupert, R.DPelt, E., Dosseto, A., Ma, L., Buss, H.L., Brantley, S.L. (2013), Regolith formation rate from U-series nuclides: Implications from the study of a spheroidal weathering profile in the Rio Icacos watershed (Puerto Rico), Geochimica et Cosmochimica Acta 100, 73-95.


12) Ma, L., Chabaux, F., Pelt, E., Granet, M., Sak, P.B., Gaillardet, J., Lebedeva, M., and Brantley, S.L. (2012), The effect of curvature on weathering rind formation: evidence from Uranium-series isotopes in basaltic andesite weathering clasts in Guadeloupe. Geochimica et Cosmochimica Acta 80, 92-107.


11) Ma, L., Jin, L., and Brantely, S.L. (2011), How mineralogy and slope aspect affect REE release and fractionation during shale weathering in the Susquehanna/Shale Hills Critical Zone Observatory. Chemical Geology 290, 31-49.


10) Chabaux, F., Ma, L., Stille, P., Pelt, E., Granet, M., Lemarchand, D., Chiara Roupert, R., Brantley, S.L. (2011), Determination of chemical weathering rates from U series nuclides in soils and weathering profiles: principles, applications and limitations. Applied Geochemistry 26, 20-23.


9) Ma, L., Jin, L., and Brantley, S.L. (2011), Geochemical behaviors of different element groups during shale weathering at the Susquehanna/Shale Hills Critical Zone Observatory. Applied Geochemistry 26, 89-93.


8) Brantley, S.L., Buss, H., Lebedeva, M., Fletcher, R.C., Ma, L. (2011), Investigating the complex interface where bedrock transforms to regolith, Applied Geochemistry 26, 12-15.


7) Ma, L., Chabaux, F., Pelt, E., Blaes, E., Jin, L., and Brantley, S.L. (2010), Regolith production rates calculated with Uranium-series isotopes at Susquehanna/Shale Hills Critical Zone Observatory. Earth and Planetary Science Letters 297, 211-225.


6) Ma, L., Castro, M.C., and Hall, C.M. (2009). Atmospheric noble gas signatures in deep Michigan Basin brines as indicators of a past thermal event, Earth and Planetary Science Letters 277, 137-147.


5) Ma, L., Castro, M.C., and Hall, C.M. (2009). Crustal noble gases in deep brines as natural tracers of vertical transport processes in the Michigan Basin, Geochemistry Geophysics Geosystems 10(6), Q06001, doi:10.1029/2009GC002475. 


4) Castro, M.C., Ma, L., and Hall, C.M. (2009). A primordial, solar He-Ne signature in crustal fluids of a stable continental region, Earth and Planetary Science Letters 279, 174-184. 


3) Ma, L., Castro, M.C., Hall, C.M., and Walter, L.M. (2005). Cross-formational flow and salinity sources inferred from a combined study of helium concentrations, isotopic ratios and major elements in the Marshall aquifer, southern Michigan, Geochemistry Geophysics Geosystems 6(10), Q10004, doi:10.1029/2005GC001010. 


2) Hall, C.M., Castro, M.C., Lohmann, K.C., and Ma, L. (2005). Noble gases and stable isotopes in a shallow aquifer in southern Michigan, Geophysical Research Letters 32, L18404, doi:10.1029/2005GL023582.


1) Ma, L., Castro, M.C., and Hall, C.M. (2004). A late Pleistocene-Holocene noble gas paleotemperature record in southern Michigan, Geophysical Research Letters 31, L23204, doi:10.1029/2004GL021766. 

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