TY - GEN
T1 - Boron isotopes as a proxy for carbonate dissolution in groundwater - Radiocarbon correction models
AU - Vengosh, A.
PY - 2010/12/1
Y1 - 2010/12/1
N2 - Radiocarbon dating of groundwater has been a major tool for assessing the residence time of groundwater. Several models have been proposed to quantify carbonate dissolution in groundwater system in attempts to correct for "dead carbon". Here I propose using boron isotopes as an additional indirect proxy for evaluating the input of carbonate dissolution. In coastal areas, meteoric boron has a high δ 11B signature (≥39%) and thus recharge water would have a significant different δ 11B value relative to solution derived from carbonate dissolution. Preservation of high δ 11B rainwater composition in coastal groundwater infers lack of carbonate dissolution and thus an indirect proxy for 14Ccorrection. The model is applied for fossil groundwater from the Disi aquifer in Jordan where high δ 11B (25-48%) and B/Cl ratio (>sea water) suggest that the recharge water originated from coastal rainwater of an early stage of air mass evolution with negligible water-rock interactions in the aquifer.
AB - Radiocarbon dating of groundwater has been a major tool for assessing the residence time of groundwater. Several models have been proposed to quantify carbonate dissolution in groundwater system in attempts to correct for "dead carbon". Here I propose using boron isotopes as an additional indirect proxy for evaluating the input of carbonate dissolution. In coastal areas, meteoric boron has a high δ 11B signature (≥39%) and thus recharge water would have a significant different δ 11B value relative to solution derived from carbonate dissolution. Preservation of high δ 11B rainwater composition in coastal groundwater infers lack of carbonate dissolution and thus an indirect proxy for 14Ccorrection. The model is applied for fossil groundwater from the Disi aquifer in Jordan where high δ 11B (25-48%) and B/Cl ratio (>sea water) suggest that the recharge water originated from coastal rainwater of an early stage of air mass evolution with negligible water-rock interactions in the aquifer.
UR - http://www.scopus.com/inward/record.url?scp=84860110053&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84860110053
SN - 9780415604260
T3 - Water-Rock Interaction - Proceedings of the 13th International Conference on Water-Rock Interaction, WRI-13
SP - 107
EP - 110
BT - Water-Rock Interaction - Proceedings of the 13th International Conference on Water-Rock Interaction, WRI-13
T2 - 13th International Conference on Water-Rock Interaction, WRI-13
Y2 - 16 August 2010 through 20 August 2010
ER -