The Mineralogy of Hydrothermal Plume Particles at the Endeavour Mid-Ocean Ridge

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dc.contributor.authorBeaupre-Olsen, Isabelle
dc.date.accessioned2023-03-17T16:44:43Z
dc.date.available2023-03-17T16:44:43Z
dc.date.copyright2023en_US
dc.date.issued2023-03-17
dc.description.abstractHydrothermal vents (aka black smokers) exist along mid-ocean ridges where volcanoes continuously create ocean crust. These have recently been recognized as an important source of biologically important elements, such as Fe, to seawater. However, most dissolved constituents of hydrothermal plumes are precipitated into minerals near vents and these settle to the seafloor forming sediments. This study examines the mineralogy and geochemistry of those sediment-hosted particles to better understand the hydrothermal contribution of elements to biogeochemical cycles in the ocean. A sediment core taken near the hydrothermal vents at the Endeavour ridge segment of the Juan de Fuca ridge (300 km west of Vancouver Island) was used to examine post depositional changes in the mineralogy and chemistry of plume particles in this sediment. A six-step dissolution was applied to extract carbonates, biogenic silicates, Fe- and Mn-oxyhydroxides and Fe-oxide phases with the major and trace element compositions of each extraction analysed by ICP-MS. This data is being used to test the hypothesis that labile poorly crystalline Fe-oxyhydroxides redissolve over 100-1000’s of years, providing a mechanism by which Fe is releasing into the water column from the seafloor. This may provide a hitherto unrecognized source of biologically available Fe to the ocean.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelUndergraduateen_US
dc.description.sponsorshipJamie Cassels Undergraduate Research Awards (JCURA)en_US
dc.identifier.urihttp://hdl.handle.net/1828/14855
dc.language.isoenen_US
dc.subjectsequential extractionen_US
dc.subjecthydrothermal sedimentsen_US
dc.subjectFe-oxyhydroxidesen_US
dc.subjectEndeavouren_US
dc.subjectIronen_US
dc.subjectFeen_US
dc.subjectHydrothermalen_US
dc.titleThe Mineralogy of Hydrothermal Plume Particles at the Endeavour Mid-Ocean Ridgeen_US
dc.typePosteren_US

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