O, H and Sr isotopes tracing the migration distance of mining, ore processing and metallurgical activities end-products in a river basin (Subarnarekha River, India)

Bruno Lemiere (1) , Philippe Négrel (1, 2)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 ISTO - Institut des Sciences de la Terre d'Orléans - UMR7327

This study reports on the geochemistry of surface-and groundwaters along the Subarnarekha River system (northeastern India). Multi-isotopic approaches (Sr, O, H) have been applied for tracing the water origin and pathways and investigate how far pollutants released by mining, ore processing and metallurgical activities can migrate at the catchment scale. Results of the Sr isotope systematics did not provide any evidence of mining processes-derived minerals impacts on the water. Pollution from mining activities entering the river are transported to the estuary as non-impacting fine fractions.

Mots clés: river basin; strontium isotopes; weathering; stable isotopes

Domaines: Géochimie

Bruno Lemiere, Philippe Négrel. O, H and Sr isotopes tracing the migration distance of mining, ore processing and metallurgical activities end-products in a river basin (Subarnarekha River, India). 11th International Symposium on Applied Isotope Geochemistry (AIG), Sep 2015, Orléans, France. pp.223 - 226, ⟨10.1016/j.proeps.2015.07.053⟩. ⟨hal-01188576⟩