TY - GEN
T1 - Sr ions and isotopes in groundwater Campeche, Mexico
T2 - 13th International Conference on Water-Rock Interaction, WRI-13
AU - Perry, E. C.
AU - Velazquez-Oliman, G.
AU - Wagner, N.
AU - Paytan, A.
AU - Street, J.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Strontium isotope chemistry, combined with previously obtained groundwater ion chemistry elucidates the stratigraphy of buried sedimentary rocks of the southern Yucatan Peninsula, Mexico. Whereas in groundwater of the northern Peninsula, ion chemistry is dominated by contact with a saline intrusion, the groundwater of southern Campeche and southern Quintana Roo has high SO 4/Cl and Sr/Cl indicating extensive contact with beds of dissolving gypsum (and celestite) in the subsurface. The newly-obtained strontium isotope data strengthen a conclusion of previous research, namely that, in marked contrast with the north, there is no saline intrusion in the southern Peninsula. 87Sr/ 86Sr measurements confirm that much of the evaporite that is contributing ions to southern Peninsula groundwater has a Kt-Eocene seawater isotope signature. A key conclusion from combined study of Sr, Sr isotopes, Cl, and SO 4 is that a large geomorphic feature in western Campeche, the Valley of Edzna polje, was once occupied by a post-Eocene seawater incursion.
AB - Strontium isotope chemistry, combined with previously obtained groundwater ion chemistry elucidates the stratigraphy of buried sedimentary rocks of the southern Yucatan Peninsula, Mexico. Whereas in groundwater of the northern Peninsula, ion chemistry is dominated by contact with a saline intrusion, the groundwater of southern Campeche and southern Quintana Roo has high SO 4/Cl and Sr/Cl indicating extensive contact with beds of dissolving gypsum (and celestite) in the subsurface. The newly-obtained strontium isotope data strengthen a conclusion of previous research, namely that, in marked contrast with the north, there is no saline intrusion in the southern Peninsula. 87Sr/ 86Sr measurements confirm that much of the evaporite that is contributing ions to southern Peninsula groundwater has a Kt-Eocene seawater isotope signature. A key conclusion from combined study of Sr, Sr isotopes, Cl, and SO 4 is that a large geomorphic feature in western Campeche, the Valley of Edzna polje, was once occupied by a post-Eocene seawater incursion.
UR - https://www.scopus.com/pages/publications/84860176545
M3 - Conference contribution
AN - SCOPUS:84860176545
SN - 9780415604260
T3 - Water-Rock Interaction - Proceedings of the 13th International Conference on Water-Rock Interaction, WRI-13
SP - 349
EP - 352
BT - Water-Rock Interaction - Proceedings of the 13th International Conference on Water-Rock Interaction, WRI-13
Y2 - 16 August 2010 through 20 August 2010
ER -