BIBLIOS

  Ciências References Management System

Visitor Mode (Login)
Need help?


Back

Publication details

Document type
Conference papers

Document subtype
Abstract

Title
Isotopic and Geochemical Composition of Water and Gaseous Phases Associated to Sandim-CO2 Rich Hydromineral System (NE-Portugal) – Preliminary Results

Participants in the publication
P.M. Carreira (Author)
G. Capasso (Author)
F. Grassa (Author)
M.R. Carvalho (Author)
Dep. Geologia
IDL - Instituto Dom Luiz
J.M. Marques (Author)
A. Sousa Oliveira (Author)
A. Vieira da Silva (Author)

Scope
International

Refereeing
Yes

Summary
The hydromineral system of Sandim, located in the NE of Portugal, is characterized by high mineralized CO2-rich water of Na-HCO3 to Na/Ca-HCO3 types. The composition of the gas phase is dominated by CO2 (up to 79.2 %), and significant CH4 concentration (up to 11,400 ppm). The δ13C in the TDIC varies between +2.4 and +3.0 ‰ vs V-PDB, and can be ascribed to different carbon origins: i) upper mantle; ii) methanogenesis and iii) contribution of metamorphic CO2. The CO2/3He and 3He/4He ratios outside the limits defined for MORB fluids. The presence of 3H in all samples indicates shallow and relatively short underground flowpaths. However, the 14C concentrations in the TDIC of the mineral waters around 2 pmC, corroborate an active carbon source without 14C. The geochemical and isotopic composition of the CO2-rich waters points to the hydromineral system of Sandim as a shallow aquifer contaminated by deep source gases.

Editor(s)
IAEA - International Atomic Energy Agency

Date of Publication
2019-05-20

Event
International Symposium on Isotope Hydrology 2019 (IAEA): Advancing the Understanding of Water Cycle Processes CN 271, 20 - 24 May, Vienna, Austria

Publication Identifiers

Address
Vienna, Austria

Organizers
IAEA - International Atomic Energy Agency

Publisher
IAEA - International Atomic Energy Agency

Edition

Number of pages
2


Export

APA
P.M. Carreira, G. Capasso, F. Grassa, M.R. Carvalho, J.M. Marques, A. Sousa Oliveira, A. Vieira da Silva, (2019). Isotopic and Geochemical Composition of Water and Gaseous Phases Associated to Sandim-CO2 Rich Hydromineral System (NE-Portugal) – Preliminary Results. International Symposium on Isotope Hydrology 2019 (IAEA): Advancing the Understanding of Water Cycle Processes CN 271, 20 - 24 May, Vienna, Austria, -

IEEE
P.M. Carreira, G. Capasso, F. Grassa, M.R. Carvalho, J.M. Marques, A. Sousa Oliveira, A. Vieira da Silva, "Isotopic and Geochemical Composition of Water and Gaseous Phases Associated to Sandim-CO2 Rich Hydromineral System (NE-Portugal) – Preliminary Results" in International Symposium on Isotope Hydrology 2019 (IAEA): Advancing the Understanding of Water Cycle Processes CN 271, 20 - 24 May, Vienna, Austria, Vienna, Austria, 2019, pp. -, doi:

BIBTEX
@InProceedings{44929, author = {P.M. Carreira and G. Capasso and F. Grassa and M.R. Carvalho and J.M. Marques and A. Sousa Oliveira and A. Vieira da Silva}, title = {Isotopic and Geochemical Composition of Water and Gaseous Phases Associated to Sandim-CO2 Rich Hydromineral System (NE-Portugal) – Preliminary Results}, booktitle = {International Symposium on Isotope Hydrology 2019 (IAEA): Advancing the Understanding of Water Cycle Processes CN 271, 20 - 24 May, Vienna, Austria}, year = 2019, pages = {-}, address = {Vienna, Austria}, publisher = {IAEA - International Atomic Energy Agency} }