Special Issue "Isotope Geochemistry of Meteoric Waters"

A special issue of Geosciences (ISSN 2076-3263). This special issue belongs to the section "Geochemistry".

Deadline for manuscript submissions: closed (15 November 2018)

Special Issue Editors

Guest Editor
Dr. Zoltán Kern

Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, MTA, Hungary
Website | E-Mail
Interests: isotopes in precipitation and atmospheric vapour; quaternary climate and environmental changes; statistical analysis of isotopic time series
Guest Editor
Dr. István Fórizs

Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, MTA, Hungary
Website | E-Mail
Interests: hydrogeology; isotope hydrogeochemistry; stable isotopes; mixing processes; origin of mineral waters

Special Issue Information

Dear Colleagues,

Water is a vital substance for life and both its quality and quantity are crucial issues.

Environmental isotopes have been extensively used for decades to address key aspects of the water cycle, such as the study of the origin, dynamics and interconnections of, for example, groundwater, surface water, and the atmosphere. This Special Issue aims to gather high-quality original research articles and reviews on recent advances in the understanding of isotope geochemistry of meteoric waters, including stable water isotope characteristics (δ18O, δ2H, d-excess, 17O-excess) of both precipitation and waters with clear meteoric origin (such as infiltrated waters and surface waters), wide spectra of light stable isotopes of dissolved species (such as sulfate, nitrate, carbonate, etc.). Regarding of the crucial information of age in water cycles contributions dealing with radioactive isotopes (3H, 14C, 81Kr, etc.) and radiogenic (4He, etc.) isotopes are also welcomed. This Special Issue invites contributions from all areas where isotope geochemical methods have been applied recently to hydrological/hydrogeological/hydrometeorological problems.

It is recommended that potentially-interested contributors approach the Guest Editors at an early stage about possible submissions in order to verify the appropriateness of their proposed study. If appropriate, an abstract will be requested, and the corresponding author required to submit the full manuscript online by the deadline of 15 November 2018.

Dr. Zoltán Kern
Dr. István Fórizs
Guest Editors

Manuscript Submission Information

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Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Geosciences is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 850 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • environmental isotopes
  • precipitation
  • residence time and transit time
  • dating of water bodies
  • tracing the water cycle
  • recharge and discharge processes
  • mixing processes
  • water pools with different origin
  • hydrogeochemisty

Published Papers (1 paper)

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Research

Open AccessArticle Intrusion of Saline Water into a Coastal Aquifer Containing Palaeogroundwater in the Viimsi Peninsula in Estonia
Geosciences 2019, 9(1), 47; https://doi.org/10.3390/geosciences9010047
Received: 14 November 2018 / Revised: 9 January 2019 / Accepted: 14 January 2019 / Published: 17 January 2019
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Abstract
The Viimsi peninsula is located north-east of Tallinn, capital of Estonia. The Cambrian-Vendian (Cm-V) aquifer system is a sole source of drinking water in the area. Historically, the groundwater exploitation has led to freshening of groundwater in the peninsula, but in recent years
[...] Read more.
The Viimsi peninsula is located north-east of Tallinn, capital of Estonia. The Cambrian-Vendian (Cm-V) aquifer system is a sole source of drinking water in the area. Historically, the groundwater exploitation has led to freshening of groundwater in the peninsula, but in recent years an increase in chloride concentrations and enrichment in δ18O values has been detected, but in recent years hydrochemical parameters indicate an increasing influence of a saline water source. The exact origin of this saline water has remained unclear. The aim of the current study is to elucidate whether the increase in Cl concentrations is related to seawater intrusion or to the infiltration of saline water from the underlying crystalline basement. To identify the source of salinity, chemical composition of the groundwater and the isotope tracers (e.g., δ18O and radium isotopes) were studied in the Viimsi peninsula in the period from 1987 to 2018. Our results show that chemical composition of Cm-V groundwater in the peninsula is clearly controlled by three-component mixing between glacial palaeogroundwater, saline water from the underling crystalline basement and modern meteoric water. The concentrations of Ra are also significantly affected by the mixing, but the spatial variation of radium isotopes (226Ra and 228Ra) suggests the widespread occurrence of the U in the surrounding sedimentary sequence. Our hypothesis is that, in addition to U originating from the crystalline basement, some U could be associated with secondary U deposits in sedimentary rocks. The formation of these secondary U deposits could be related to glacial meltwater intrusion in the Pleistocene. Although the results suggest that the infiltration of saline groundwater from the underlying crystalline basement as the main source of salinity in the study area, the risk of seawater intrusion in the future cannot be ruled out. It needs to be highlighted that the present groundwater monitoring networks may not be precise enough to detect the potential seawater intrusion and subsequent changes in water quality of the Cm-V aquifer system in the Viimsi peninsula. Full article
(This article belongs to the Special Issue Isotope Geochemistry of Meteoric Waters)
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