THE OLDEST SEAFLOOR MASSIVE SULFIDE DEPOSITS AT THE MID-ATLANTIC RIDGE: Th-230/U CHRONOLOGY AND COMPOSITION

Vladislav Kuznetsov, Eriks Tabuns, Kathrine Kuksa, Georgy Cherkashov, Fedor Maksimov, Viktor Bel'Tenev, Larisa Lazareva, Igor Zherebtsov, Vasily Grigoriev, Nadezhda Baranova

Результат исследований: Научные публикации в периодических изданияхстатья

Аннотация

A geochronological and geochemical study on 10 samples of seafloor massive sulfides (SMS) from the inactive Peterburgskoye hydrothermal field at the Mid-Atlantic Ridge (MAR) was carried out. The 230Th/U ages of the SMS are the oldest ever found in other fields at the MAR. According to them the SMS formed from ca. 170 to 63 ka. Their possible spatial evolution was proposed. The oldest hydrothermal ores from the Peterburgskoye field consist mainly of pyrite and chalcopyrite and have geochemical properties typical for SMS associated with basalts.
Язык оригиналаанглийский
Страницы (с-по)100-106
Число страниц7
ЖурналGeochronometria
Том42
Номер выпуска1
DOI
СостояниеОпубликовано - 2015

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