کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4700039 1637689 2010 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of till provenance on regional groundwater geochemistry
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
Influence of till provenance on regional groundwater geochemistry
چکیده انگلیسی

A regional groundwater geochemistry study was conducted in the Paskapoo Formation of southern Alberta, Canada. Our study area focused on a region where two continental ice sheets, the Cordilleran and Laurentide met. The glacial deposits transported by these ice sheets have different bulk characteristics reflective of the bedrock of the source region of the ice. Recharge through these two different glacial deposits generates distinctly different water geochemistry within the underlying Paskapoo Formation, such that bedrock aquifer acquires a geochemical signature of the immediately overlying glacial deposits through which recharge occurs. Oxidation of pyrite in Laurentide till generates high-sulphate groundwater, and associated acid generation leads to enhanced mineral weathering. This generates high TDS high Na–SO4 groundwater in underlying bedrock aquifers. This process appears transitory, where thin Laurentide drift deposits are completely oxidized and have reduced capacity to generate high-sulphate water. The same bedrock underlying carbonate dominated Cordilleran drift deposits have low TDS Ca–HCO3 groundwater.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Geology - Volume 273, Issues 3–4, 15 May 2010, Pages 225–237
نویسندگان
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