The Hydrogeochemistry of the Karst Aquifer System of the Northern Yucatan Peninsula, Mexico

Citation

Material Information

Title:
The Hydrogeochemistry of the Karst Aquifer System of the Northern Yucatan Peninsula, Mexico
Series Title:
International Geology Review
Creator:
Perry, Eugene
Velazquez-Oliman, Guadalupe
Marin, Luis
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Geochemistry ( local )
Stratigraphy ( local )
Surficial And Tectonic Characteristics ( local )
The Northern Yucatan Peninsula, Mexico ( local )
Carbonate Platforms ( local )
Hydrogeochemical/Physiographic Regions ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
Based on groundwater geochemistry, stratigraphy, and surficial and tectonic characteristics, the northern Yucatan Peninsula, Mexico, a possible analog for ancient carbonate platforms, is divided into six hydrogeochemical/physiographic regions: (1) Chicxulub Sedimentary Basin, a Tertiary basin within the Chicxulub impact crater; (2) Cenote Ring, a semicircular region of sinkholes; (3) Pockmarked Terrain, a region of mature karst; (4) Ticul fault zone; (5) Holbox Fracture Zone-Xel-Ha Zone; and (6) Evaporite Region. Regional characteristics result from tectonics, rock type, and patterns of sedimentation, erosion, and rainfall. The Cenote Ring, characterized by high groundwater flow, outlines the Chicxulub Basin. Most groundwater approaches saturation in calcite and dolomite but is undersaturated in gypsum. Important groundwater parameters are: SO4/Cl ratios related to seawater mixing and sulfate dissolution; Sr correlation with SO4 and saturation of Lake Chichancanab water with celestite, indicating celestite as a major source of Sr; high Sr in deep water of cenotes, indicating deep circulation and contact of groundwater with evaporite; and correlation of Ca, Mg, and SO4, probably related to gypsum dissolution and dedolomitization. Based on geochemistry we propose: (1) a fault between Lake Chichancanab and Cenote Azul; (2) deep seaward movement of groundwater near Cenote Azul; and (3) contribution of evaporite dissolution to karst development in the Pockmarked Terrain. Chemical erosion by mixing-zone dissolution is important in formation of Estuario Celestun and other estuaries, but is perhaps inhibited at Lake Bacalar where groundwater dissolves gypsum, is high in Ca, low in CO3, and does not become undersaturated in calcite when mixed with seawater.
Original Version:
International Geology Review, Vol. 44, no. 3 (2010-07-14).

Record Information

Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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