PROJECT : HOT Hg
- Funding : ANR
- Start Date : 01/10/2021
- End Date : 28/02/2026
- Project Website
Scientific project
HOT Hg
HydrOThermal Mercury – the natural story of a contaminant
Principal Investigator(s) :
Lars-Eric Heimburger
Local Coordinator(s) :
Cécile Guieu
Team(s) involved :
CHOC
Members :
Maryline Montanes
SUMMARY
The overarching goal of the HOT Hg research project is to understand and quantify the role of hydrothermal Hg emissions in both local marine ecosystems and in the global Hg cycle
Project Description
HOT Hg investigates the biogeochemical, physicochemical, and microbial conditions that control Hg discharge and net MeHg production at hydrothermal vents (HV), and their impact on the local food web controlled by local hydrodynamics and dispersal. ANR HOT Hg will investigate Hg fluxes, speciation, and transformations at HV to provide better constraints on the global Hg cycle and to study the bioaccumulation on the ecosystem locally. To do so, 5 selected shallow and 3 deep hydrothermal vents sites, covering complementary geographic, geologic and biogeochemical settings will be surveyed for temperature, salinity, pH, O2, fluorescence, particles, CH4, optical properties of DOM, iron and sulfur speciation, macro nutrients, dissolved iron and other trace metals, REE and eNd measurements. LOV is participating to fieldwork and is responsible for DFe sampling and measurements.
