Articles | Volume 501
https://doi.org/10.5194/piodp-501-1-2025
https://doi.org/10.5194/piodp-501-1-2025
Scientific prospectus
 | 
03 Nov 2025
Scientific prospectus |  | 03 Nov 2025

IODP3–NSF Expedition 501 “New England Shelf Hydrogeology” Scientific Prospectus

Brandon Dugan, Karen Johannesson, and Jeremy Everest

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Cited articles

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Bense, V. F. and Person, M. A.: Transient hydrodynamics within intercratonic sedimentary basins during glacial cycles, J. Geophys. Res., 113, 2003–2012, https://doi.org/10.1029/2007JF000969, 2008. 
Cohen, D., Person, M., Wang, P., Gable, C. W., Hutchinson, D., Marksamer, A., Dugan, B., Kooi, H., Groen, K., Lizarralde, D., Evans, R. L., Day-Lewis, F. D., and Lane Jr., J. W.: Origin and Extent of Fresh Paleowaters on the Atlantic Continental Shelf, USA, Groundwater, 48, 143- 158, https://doi.org/10.1111/j.1745-6584.2009.00627.x, 2010. 
Darling, W. G.: Hydrological factors in the interpretation of stable isotopic proxy data present and past: a European perspective, Quaternary Sci. Rev., 23, 743–770, https://doi.org/10.1016/j.quascirev.2003.06.016, 2004. 
Darling, W. G.: The isotope hydrology of quaternary climate change, J. Hum. Evol., 60, 417–427, https://doi.org/10.1016/j.jhevol.2010.05.006, 2011. 
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Freshened water exists in continental shelf aquifers worldwide. One remarkable example is the US Atlantic shelf, where groundwater in shallow sand aquifers >100 km offshore has salinity that is 10 % of seawater salinity. Expedition 501 will drill sites off Massachusetts, US, to estimate how much freshened water there is, processes that emplace the water, and rates of emplacement. The expedition will also assess whether salinity patterns have important implications for microbial processes.
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