BARIUM ANOMALY IN THE CAMBRIAN-VENDIAN AQUIFER SYSTEM IN NORTH ESTONIA
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dc.contributor.author | Marandi A. | |
dc.contributor.author | Karro E. | |
dc.contributor.author | Puura E. | |
dc.date.accessioned | 2022-07-16T02:46:13Z | |
dc.date.available | 2022-07-16T02:46:13Z | |
dc.date.issued | 2004 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=31271241 | |
dc.identifier.citation | Environmental Geology, 2004, 47, 1, 132-139 | |
dc.identifier.issn | 0943-0105 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/38146 | |
dc.description.abstract | A barium anomaly with a maximum Ba2+ concentration of 6.37mg/l was distinguished in a Cambrian-Vendian (Cm-V) aquifer system that is widely used as a drinking water source in the towns Kunda, Rakvere and Kohtla-Jrve of North-Estonia. The modelling results show that at low sulphate concentrations (below 3mg/l) Ba2+ contents can exceed the limit values for drinking water (such as 2mg/l set by US EPA). Bicarbonate ions in their common concentration range in groundwater cannot limit Ba2+ at its content below 10mg/l. The probable natural sources of the anomaly are the crystalline basement and its weathering zone. Groundwater in the clayey weathering core is hydraulically connected with the overlying Cm-V aquifer system, thus the upconing of deeper-seated groundwater, caused by intensive exploitation of wells, is possible. | |
dc.subject | barium | |
dc.subject | North Estonia | |
dc.subject | Cambrian | |
dc.subject | Vendian | |
dc.title | BARIUM ANOMALY IN THE CAMBRIAN-VENDIAN AQUIFER SYSTEM IN NORTH ESTONIA | |
dc.type | Статья | |
dc.subject.age | Paleozoic::Cambrian | |
dc.subject.age | Докембрий::Протерозой::Неопротерозойская::Вендский | ru |
dc.subject.age | Precambrian::Proterozoic::Neoproterozoic::Vendian | |
dc.subject.age | Палеозой::Кембрийская | ru |
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