DOI: 10.5194/hess-19-1413-2015
Scopus记录号: 2-s2.0-84924941705
论文题名: Timescales of regional circulation of saline fluids in continental crystalline rock aquifers (Armorican Massif, western France)
作者: Armandine Les Landes A ; , Aquilina L ; , Davy P ; , Vergnaud-Ayraud V ; , Le Carlier C
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2015
卷: 19, 期: 3 起始页码: 1413
结束页码: 1426
语种: 英语
Scopus关键词: Aquifers
; Buildings
; Chlorine compounds
; Crystalline materials
; Hydrogeology
; Leaching
; Chloride concentrations
; Conceptual model
; Crystalline basement
; Flushing process
; Marine transgression
; Meteoric waters
; Regional circulation
; Vertical distributions
; Crystalline rocks
; aquifer
; chloride
; concentration (composition)
; crystalline rock
; flushing
; leaching
; meteoric water
; Miocene
; Pleistocene
; Pliocene
; saline intrusion
; seawater
; timescale
; transgression
; Armorican Massif
; Bretagne
; France
英文摘要: In recent decades, saline fluids have been sampled worldwide at great depths in continental basements. Although some of them have been attributed to marine transgressions, the mechanisms allowing their circulation are not understood. In this paper, we describe the horizontal and vertical distributions of moderately saline fluids (60 to 1400 mg Lg'1) sampled at depths ranging from 41 to 200 m in crystalline rock aquifers on the regional scale of the Armorican Massif (northwestern France). The horizontal and vertical distributions of high chloride concentrations are in good agreement with both the altitudinal and vertical limits and the succession of the three major transgressions between the Mio-Pliocene and Pleistocene ages. The mean chloride concentration for each transgression area is exponentially related to the time spanned until the present. It defines the potential laws of leaching (displacement) of marine waters by fresh meteoric waters. The results of the Armorican aquifers provide the first observed constraints for the timescales of seawater circulation in the continental crystalline basement and the subsequent leaching by fresh meteoric waters. The general trend of increasing chloride concentration with depth and the time frame for the flushing process provide useful information to develop conceptual models of the paleo-functioning of Armorican aquifers. © 2015 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78572
Appears in Collections: 气候变化事实与影响
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作者单位: UMR6118, CNRS, University of Rennes 1, 263 Avenue du Général Leclerc, Rennes, France
Recommended Citation:
Armandine Les Landes A,, Aquilina L,, Davy P,et al. Timescales of regional circulation of saline fluids in continental crystalline rock aquifers (Armorican Massif, western France)[J]. Hydrology and Earth System Sciences,2015-01-01,19(3)