Identification and characterization of a saline wedge in the Bajocian-Bathonian coastal aquifer of the area of Caen (France)
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- 作者：Barbecot ; Florent ; Marlin ; Christelle ; Gilbert ; Elisabeth ; Dever ; Laurent
- 关键词：Geochemistry ; Coastal aquifer ; Radiocarbon ; Holocene ; Geochimie ; Aquifè ; res cô ; tiers ; Radiocarbone ; Holocè ; ne
- 刊名：Comptes Rendus de l'Academie des Sciences Series IIA Earth and Planetary Science
- 出版年：1998
- 出版时间：April, 1998
- 年：1998
- 卷：326
- 期：8
- 页码：539-544
- 全文大小：677 K
文摘
The Bajocian-Bathonian aquifier in the Caen region is largely exploited for drinking water and agriculture. When this coastal carbonated aquifer becomes confined, groundwater presents an increasing TDS both vertically and along the flow path. This is explained by water-carbonate interaction and by a mixing with marine water (up to 4 % ). Radiocarbon dating, after correction of the initial activity according to different models, shows a wide range of groundwater ‘ages’, from 40 000 years B.P. to the present. The marine transgression has thus been estimated as having occurred during the Early Holocene period.