Publications
Yaqoob M., Ishaq, M., Ansari, M., Sujay Anand John Jayachandran, I., Hashim, M., Seers, T. 2025. MicroCrystalNet: An Efficient Convolutional Neural Network for Microcrystal Classification using Scanning Electron Microscope Petrography. IEEE Access. https://ieeexplore.ieee.org/document/10930763
Hashim, M., Subhas, A., Kaczmarek, S., Gemakrisindo Wolfram Naa, and Bish, D. 2024. A Process-based Geochemical Framework for Carbonate Sediments During Marine Diagenesis. Geochimica et Cosmochimica Acta. https://doi.org/10.1016/j.gca.2024.05.023
Hashim, M., Rose, K., Cohen, H., and Kaczmarek, S. 2023. Effects of Sodium and Potassium on Dolomite formation rate, Stoichiometry, Crystallographic Characteristics. Sedimentology. https://doi.org/10.1111/sed.13124
Hashim, M., Burke, J., Hardisty, D., and Kaczmarek, S.E. 2022. Iodine Incorporation into Dolomite: Experimental Constraints and Implications for the Iodine Redox Proxy and Proterozoic Ocean. Geochimica et Cosmochimica Acta. https://doi.org/10.1016/j.gca.2022.10.027
Hashim, M. and Kaczmarek, S.E. 2022. Rhombic Calcite Microcrystals as a Textural Proxy for Meteoric Diagenesis. Scientific Reports. https://doi.org/10.1038/s41598-021-04219-2
Hashim, M. and Kaczmarek, S.E. 2021. The Transformation of Aragonite to Calcite in the Presence of Magnesium: Implications for Marine Diagenesis. Earth and Planetary Science Letters, v. 574., no. 117166. Doi: https://doi.org/10.1016/j.epsl.2021.117166
Hashim, M. and Kaczmarek, S.E, 2021. Evolution of Calcite Microcrystal Morphology during Experimental Dissolution. Journal of Sedimentary Research, v. 91 (3), p. 229–242. https://doi.org/10.2110/jsr.2020.154
Hashim, M. and Kaczmarek, S.E, 2020. Experimental Stabilization of Carbonate Sediments to Calcite: Insights into the Depositional and Diagenetic Controls on Calcite Microcrystal Texture. Earth and Planetary Science Letters. vol. 538, no. 116235. https://doi.org/10.1016/j.epsl.2020.116235
Hashim, M. and Kaczmarek, S.E., 2019. A Review of the Nature and Origin of Limestone Microporosity. Marine and Petroleum Geology, 107, p. 527–554. https://doi.org/10.1016/j.marpetgeo.2019.03.037
Hashim, M., Marx, L., Dean, C., Burdige, E., Hayden, M., Klein, F., Van Mooy, B., McCorkle, D., and Subhas, A. V. 2025. Mineral Formation during Shipboard Ocean Alkalinity Enhancement Experiments in the North Atlantic. EGUsphere [preprint], https://doi.org/10.5194/egusphere-2025-988.
Hashim, M., Conte, M., Salter, M., A., Pedrosa-Pamies, R. Weber, J. C., Hayden M., Wilson R., Perry, C., Crowley, S.F., Dennis, P.F., Bish, D., and Subhas, A.V. 2025. Fish Carbonates in the Open Ocean and Their Role in the Carbon Cycle. In revision at Global Biogeochemical Cycles.
Tominaga, M., Konrad, K., Reilly, B., Schrenk, M., Walczak, M., Hashim, M., et al. The FUTURE of the US marine seafloor & subseafloor sampling capabilities 2025. In revision at AGU Advances
Hupp, B., Hashim, M., Yobo, L., N., Ajayi, J., Bryant, R., Chin, S., and Kinsley, C., Villa, A., Nana Yobo, L., Ajayi, J. O., and the Participants of the Establishing Early-Career Scientific Ocean Drilling Learning Communities Workshop. 2025. Perspectives on Developing a Diverse, Knowledgeable, and Inclusive Scientific Community in the Shifting Landscape of U.S. Scientific Ocean Drilling. In revision at Earth Science, Systems and Society.
Subhas, A.V. Hashim, H. Long, M.L. McCorkle, D.C. Liu, X., Gray, W.R., Berelson, W.M., and Adkins, J.F. 2025. Enhanced solubility of planktonic foraminiferal calcite in seawater. In revision at Science Advances.
Cook, L., K., Hashim, M., Schwarz, M., Urick, S., Subhas, A. V., and Saba, G, K. A novel laboratory-quantified carbon production suite for an abundant, temperate marine forage fish. In preparation for Limnology & Oceanography.
Marx, L., Hashim, M., McCorkle, D.C., Subhas, A.S. Guidelines for Carbonate Chemistry Measurements during Ocean Alkalinity Enhancement Experiments in the Field. In preparation for Marine Chemistry.
Crockford, P., Hashim, M., et al., The effect of subseafloor processes on barium concentration and isotopes on the slope of the Great Bahama Bank. In preparation for Earth and Planetary Science Letters
McCormick C., Hardisty, D., Hashim, M., Lau, K. Experimental constraints on the partitioning of uranium in dolomite. In preparation for Geochimica et Cosmochimica Acta.
Akam, S.A., Hardisty, D., Feng, D. Wang, X., Hashim, M., Burke, J. Swanner, E., Crémière, A., Peckmann, J. Incorporation of iodine in methane-derived authigenic carbonates: Implications for methane flux dynamics. In preparation for Geochimica et Cosmochimica Acta
Hashim, M. S., Marx, L., Dean, C., Burdige, E., Hayden, M., Klein, F., Van Mooy, B., McCorkle, D., and Subhas, A. V. Mineral Formation during Shipboard Ocean Alkalinity Enhancement Experiments in the North Atlantic. AGU Fall Meeting. Washington, D.C. 9-13 December 2024.
McCormick, C. A., Hardisty, D., Pederson, C., Deitrich, W. L., Bondzie-Selby, I., Hashim, M. S., and Lau, K. V. Experimental constraints on the partitioning of uranium in dolomite. AGU Fall Meeting. Washington, D.C. 9-13 December 2024.
Dietrich, W. L., McCormick, C. A., Hashim, M. S., Hardisty, D. S., and Lau, K. V. Constraints on dolomite as an archive of seawater sulfate from high temperature dolomitization experiments. Submitted to Goldschmidt 2024.
McCormick, C. A., Hashim, M. S., Hardisty, D. S., and Lau, K. V. Partitioning of uranium in high-temperature, replacement dolomitization experiments: implications for isotopic studies of ancient carbonate rocks. Poster presentation. SEPM International Sedimentary Geosciences Congress. 5-8 May, 2024, Flagstaff, AZ.
Hashim, M., Subhas, A., Kaczmarek, S., Wolfram Naa, G., and Bish, D. How useful is Scientific Ocean Drilling data for carbonate chemistry? FUTURE of US Marine Seafloor and Subseafloor Sampling Capabilities Workshop. 26-28 March 2024, Woods Hole, MA.
Hashim, M., Subhas, A. V., Pedrosa Pamies, R., Salter, M., and Conte, M. H. Non-traditional sources of calcium carbonate in the deep Sargasso Sea. Ocean Sciences Meeting, New Orleans, LA, 18-23 February 2024. Oral presentation.
Hamilton, Y., Subhas, A. V., Smith, C., and Hashim, M. Testing the Impact of Mg/Ca and [SO4] on the Growth and Calcification of the coccolithophore Emiliania huxleyi. Ocean Sciences Meeting, New Orleans, LA, 18-23 February 2024.
Garcia, E., Subhas, A. V., Smith, C., and Hashim, M. Gephyrocapsa Oceanica's Physiological Response to Alkalinity Enhancement in Laboratory Cultures. Ocean Sciences Meeting, New Orleans, LA, 18-23 February 2024.
Cook, L., Saba, G., Hashim, M., Subhas, A. V., Schwarz, M., and Urick, S. Novel quantification of carbon production for a dominant Northwest Atlantic forage fish, Atlantic menhaden (Brevoortia tyrannus; family: Clupeidae) under ambient and projected future summer temperatures. Ocean Sciences Meeting, New Orleans, LA, 18-23 February 2024.
Hashim, M., Subhas, A., and Klein, F. Micro-scale Observations and Global Trends in Carbonate Diagenesis at the Great Bahama Bank. Goldschmidt Conference, Lyon, France, 9-14 July 2023.
Akam, S., Hardisty, D., Wang, X., Feng, D., Hashim, M., Burke, J., Swanner, E., Crémière, A., and Peckmann, J. Incorporation of Iodine in methane-derived authigenic carbonates: Implications for methane flux dynamics. Goldschmidt Conference, Lyon, France, 9-14 July 2023.
Kaczmarek, S., Laya, J. C., and Hashim, M. Tracking trace element concentrations in dolomite during high-temperature experiments. 36th International Meeting of Sedimentology (IAS), Dubrovnik, Croatia, June 12-16 2023.
Hashim, M., Wolfram Naa, G., Subhas, A., and Kaczmarek, S. 2022. Process-based approach to carbonate diagenesis: back to basics (oral presentation). AGU Fall Meeting 2022, December 12-16, Chicago, IL.
Hashim, M., Subhas, A., Kaczmarek, S., and Wolfram Naa, G. 2022. Simple Experiments can Shape our Understanding of Complex Processes (Invited lightning talk). AGU Fall Meeting 2022, December 12-16, Chicago, IL.
Hashim, M., and Kaczmarek, S. E. 2022. Rhombic Calcite Microcrystals as A Proxy for Meteoric Diagenesis (Oral Presentation). GSA North-Central/Southeastern Joint Section Meeting, 7 April 2022, Cincinnati, OH.
Hashim, M., Burke, J., Hardisty, D., and Kaczmarek, S. E. 2021. An Experimental Investigation of Iodine Incorporation into Dolomite: Implications for the Iodine Redox Proxy (Oral Presentation). AGU Fall Meeting 2021, December 13-17, New Orleans, LA.
Hashim, M., Burke, J., Hardisty, D., and Kaczmarek, S. E. 2021. An Experimental Investigation of Iodine Incorporation into Dolomite: Implications for the Iodine Redox Proxy (Oral Presentation). Midwest Geobiology Symposium, September 25, Indianapolis, IN.
Hashim, M., and Kaczmarek, S. E. 2020. The role of fluid
ratio in explaining the inhibition of calcite growth by magnesium. Goldschmidt Virtual Meeting, June 21-26 #2020003607.
Hashim, M., and Kaczmarek, S. E. 2019. Reaction rate as the fundamental control on calcite microcrystal size (Poster Presentation). AGU Fall Meeting 2019, December 9-13, San Francisco, CA, #525780.
Hashim, M., and Kaczmarek, S. E. 2019. Experimental insights on mineralogical stabilization in carbonates (Oral Presentation). American Association of Petroleum Geologists Annual Conference, May 19-22, San Antonio, TX, #353.
Hashim, M., and Kaczmarek, S. E. 2018. Using laboratory experiments to investigate the controls on LMC microcrystal textures. Geological Society of America Annual Meeting, November 4-7, Indianapolis, IN, #321083.
Hashim, M., and Kaczmarek, S. E. 2018. Genetic origin and diagenetic transformation of LMC microcrystal textures in limestones (Poster Presentation). American Association of Petroleum Geologists Annual Conference, May 20-23, Salt Lake City, TU, #2855212.