O, H and C isotopic systematics of Icelandic groundwater

TY - GEN

T1 - O, H and C isotopic systematics of Icelandic groundwater

AU - Sveinbjornsdottir, Arny E.

AU - Stefánsson, Andri

AU - Heinemeier, Jan

PY - 2019/6

Y1 - 2019/6

N2 - Stable water isotopes of oxygen and hydrogen have been studied in Icelandic natural waters since 1960 for hydrological and geothermal research. All the waters are of meteoric and seawater origin. The measured range in δD and δO is large -131 to +3.3‰ and -20.8 to +2.3‰ respectively. Some of the waters are more depleted than any present-day precipitation suggesting a pre-Holocene component in the groundwater. Carbon isotopes of streams, rivers, soil and groundwater have been studied since 1990 in order to evaluate the carbon sources and reactions that possibly influence the carbon systematics of the water. Results show large range of values, for δC DIC -27.4 to +4.5‰ and for 14C DIC +0.6 to +118 pMC. Apart from atmospheric, organic and rock leaching, input of gas at depth with similar isotopic composition as the pre-erupted melt of the upper mantle and lower crust beneath Iceland have been identified as sources for carbon in the deeper groundwater.

AB - Stable water isotopes of oxygen and hydrogen have been studied in Icelandic natural waters since 1960 for hydrological and geothermal research. All the waters are of meteoric and seawater origin. The measured range in δD and δO is large -131 to +3.3‰ and -20.8 to +2.3‰ respectively. Some of the waters are more depleted than any present-day precipitation suggesting a pre-Holocene component in the groundwater. Carbon isotopes of streams, rivers, soil and groundwater have been studied since 1990 in order to evaluate the carbon sources and reactions that possibly influence the carbon systematics of the water. Results show large range of values, for δC DIC -27.4 to +4.5‰ and for 14C DIC +0.6 to +118 pMC. Apart from atmospheric, organic and rock leaching, input of gas at depth with similar isotopic composition as the pre-erupted melt of the upper mantle and lower crust beneath Iceland have been identified as sources for carbon in the deeper groundwater.

UR - http://www.scopus.com/inward/record.url?scp=85067306045&partnerID=8YFLogxK

U2 - 10.1051/e3sconf/20199807031

DO - 10.1051/e3sconf/20199807031

M3 - Conference article

AN - SCOPUS:85067306045

SN - 2100-014X

VL - 98

JO - E3S Web of Conferences

JF - E3S Web of Conferences

M1 - 07031

T2 - 16th International Symposium on Water-Rock Interaction, WRI 2019 and 13th International Symposium on Applied Isotope Geochemistry, 1st IAGC International Conference

Y2 - 21 July 2019 through 26 July 2019

ER -