FN Archimer Export Format PT J TI Manganese, methane and helium anomalies in seawater above the Mid-Atlantic Ridge: evidence of hydrothermal activity BT AF GRIMAUD, D BLANC, G CHARLOU, Jean-Luc JEAN-BAPTISTE, P DMITRIEV, L AS 1:;2:;3:;4:;5:; FF 1:;2:;3:PDG-REM-GM-LGM;4:;5:; SI BREST SE PDG-REM-GM-LGM TC 0 UR https://archimer.ifremer.fr/doc/00070/18106/15654.pdf LA English DT Article PY 1992 SO Bulletin de la Société géologique de France VL 45 IS 2 BP 61 EP 75 ID 18106 ER EF