TY - JOUR
T1 - Groundwater chemistry and Sr isotope ratios shed light on connectivity and water-rock interactions in the coastal aquifer of the Caribbean coast, Mexico
AU - Hernández-Terrones, L. M.
AU - Street, J.
AU - Null, K.
AU - Paytan, A.
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1/1
Y1 - 2021/1/1
N2 - Radiogenic strontium isotopic ratios (87Sr/86Sr) and solute concentrations in groundwater samples from the coastal area of the eastern Yucatán Peninsula, Quintana Roo, Mexico were measured to assess connectivity and water-rock interactions within different groundwater systems in the region. The average 87Sr/86Sr ratios vary from south to north with values in Xcalak around 0.70889, Sian Ka'an around 0.70847 and at Cancun and Puerto Morelos around 0.70880. The values show 3 clusters suggesting 3 distinct groundwater systems, Cancun-Puerto Morelos in the north, Tulum-Sian Ka'an in the center and Xcalak in the South. Water-rock interactions, while unique within each aquifer system, encompass processes observed throughout the Yucatan karst system including dissolution of evaporites, precipitation of carbonate, sulfate reduction and mixing with seawater. This study highlights the use of groundwater chemistry of understanding groundwater connectivity and the importance of potential distal anthropogenic impacts on groundwater quality and related effect on coastal population and ecosystems.
AB - Radiogenic strontium isotopic ratios (87Sr/86Sr) and solute concentrations in groundwater samples from the coastal area of the eastern Yucatán Peninsula, Quintana Roo, Mexico were measured to assess connectivity and water-rock interactions within different groundwater systems in the region. The average 87Sr/86Sr ratios vary from south to north with values in Xcalak around 0.70889, Sian Ka'an around 0.70847 and at Cancun and Puerto Morelos around 0.70880. The values show 3 clusters suggesting 3 distinct groundwater systems, Cancun-Puerto Morelos in the north, Tulum-Sian Ka'an in the center and Xcalak in the South. Water-rock interactions, while unique within each aquifer system, encompass processes observed throughout the Yucatan karst system including dissolution of evaporites, precipitation of carbonate, sulfate reduction and mixing with seawater. This study highlights the use of groundwater chemistry of understanding groundwater connectivity and the importance of potential distal anthropogenic impacts on groundwater quality and related effect on coastal population and ecosystems.
KW - Groundwater
KW - Karst aquifer
KW - Mexican Caribbean
KW - Strontium isotopes
KW - Submarine groundwater discharge
KW - Water-rock interactions
UR - https://www.scopus.com/pages/publications/85096215457
U2 - 10.1016/j.csr.2020.104293
DO - 10.1016/j.csr.2020.104293
M3 - Article
AN - SCOPUS:85096215457
SN - 0278-4343
VL - 212
JO - Continental Shelf Research
JF - Continental Shelf Research
M1 - 104293
ER -
