Mineralogical sources of groundwater fluoride in Archaen bedrock/regolith aquifers: Mass balances from southern India and north-central Sri Lanka
Study region: The Maheshwaram and Waipally catchments of Andhra Pradesh, India, and the Plonnaruwa catchment of north-central Sri Lanka. Study focus: The distribution of F across eight crystalline phases and between the bedrock and the regolith at eleven sites in three catchments is documented. Mine...
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doaj-21bc61fda7994256aa467e07033af72d2020-11-24T20:53:57ZengElsevierJournal of Hydrology: Regional Studies2214-58182015-09-014PA11113010.1016/j.ejrh.2014.10.003Mineralogical sources of groundwater fluoride in Archaen bedrock/regolith aquifers: Mass balances from southern India and north-central Sri LankaB.M. Hallett0H.A. Dharmagunawardhane1S. Atal2E. Valsami-Jones3S. Ahmed4W.G. Burgess5Department of Earth Sciences, University College London, Gower Street, London WC1E 6BT, UKDepartment of Geology, University of Peradeniya, Peradeniya, Sri LankaCSIR-National Geophysical Research Institute, Hyderabad 500606, IndiaSchool of Geography, Earth and Environmental Sciences, University of Birmingham, UKCSIR-National Geophysical Research Institute, Hyderabad 500606, IndiaDepartment of Earth Sciences, University College London, Gower Street, London WC1E 6BT, UKStudy region: The Maheshwaram and Waipally catchments of Andhra Pradesh, India, and the Plonnaruwa catchment of north-central Sri Lanka. Study focus: The distribution of F across eight crystalline phases and between the bedrock and the regolith at eleven sites in three catchments is documented. Mineral contributions to F release during weathering and regolith development are quantified. New hydrological insights for the region: An estimate of weathering duration for the in situ regolith in Andhra Pradesh, 250–380 Ka, is close to a previous estimate for southern India. Partial or total destruction of the primary F-bearing bedrock minerals and consistent depletion of F in the remnant minerals result in a much reduced total F content in the regolith. Leaching experiments and field relationships, however, indicate a greater potential for F mobilisation to groundwater from the regolith than the bedrock. Schemes for managed aquifer recharge should beware the risk of mobilising additional F to groundwater.http://www.sciencedirect.com/science/article/pii/S2214581814000391GroundwaterFluorideRegolithArchaenIndiaSri Lanka |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
B.M. Hallett H.A. Dharmagunawardhane S. Atal E. Valsami-Jones S. Ahmed W.G. Burgess |
spellingShingle |
B.M. Hallett H.A. Dharmagunawardhane S. Atal E. Valsami-Jones S. Ahmed W.G. Burgess Mineralogical sources of groundwater fluoride in Archaen bedrock/regolith aquifers: Mass balances from southern India and north-central Sri Lanka Journal of Hydrology: Regional Studies Groundwater Fluoride Regolith Archaen India Sri Lanka |
author_facet |
B.M. Hallett H.A. Dharmagunawardhane S. Atal E. Valsami-Jones S. Ahmed W.G. Burgess |
author_sort |
B.M. Hallett |
title |
Mineralogical sources of groundwater fluoride in Archaen bedrock/regolith aquifers: Mass balances from southern India and north-central Sri Lanka |
title_short |
Mineralogical sources of groundwater fluoride in Archaen bedrock/regolith aquifers: Mass balances from southern India and north-central Sri Lanka |
title_full |
Mineralogical sources of groundwater fluoride in Archaen bedrock/regolith aquifers: Mass balances from southern India and north-central Sri Lanka |
title_fullStr |
Mineralogical sources of groundwater fluoride in Archaen bedrock/regolith aquifers: Mass balances from southern India and north-central Sri Lanka |
title_full_unstemmed |
Mineralogical sources of groundwater fluoride in Archaen bedrock/regolith aquifers: Mass balances from southern India and north-central Sri Lanka |
title_sort |
mineralogical sources of groundwater fluoride in archaen bedrock/regolith aquifers: mass balances from southern india and north-central sri lanka |
publisher |
Elsevier |
series |
Journal of Hydrology: Regional Studies |
issn |
2214-5818 |
publishDate |
2015-09-01 |
description |
Study region: The Maheshwaram and Waipally catchments of Andhra Pradesh, India, and the Plonnaruwa catchment of north-central Sri Lanka.
Study focus: The distribution of F across eight crystalline phases and between the bedrock and the regolith at eleven sites in three catchments is documented. Mineral contributions to F release during weathering and regolith development are quantified.
New hydrological insights for the region: An estimate of weathering duration for the in situ regolith in Andhra Pradesh, 250–380 Ka, is close to a previous estimate for southern India. Partial or total destruction of the primary F-bearing bedrock minerals and consistent depletion of F in the remnant minerals result in a much reduced total F content in the regolith. Leaching experiments and field relationships, however, indicate a greater potential for F mobilisation to groundwater from the regolith than the bedrock. Schemes for managed aquifer recharge should beware the risk of mobilising additional F to groundwater. |
topic |
Groundwater Fluoride Regolith Archaen India Sri Lanka |
url |
http://www.sciencedirect.com/science/article/pii/S2214581814000391 |
work_keys_str_mv |
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