6533b82efe1ef96bd12931d4
RESEARCH PRODUCT
Discrimination between effects induced by microbial activity and water-rock interactions under hydrothermal conditions according to REE behaviour
Pierpaolo ZuddasPaolo MadoniaLorenzo BruscaMarianna CangemiPaolo CensiFilippo Saianosubject
Rare Earth ElementsbiologyRock-water interactionsStromatolites; Rare Earth Elements; Bacterial activity; Rock-water interactions Hydrothermal systemRare earthGeochemistryMineralogyEarth and Planetary Sciences(all)General Medicinebiology.organism_classificationHydrothermal circulationStromatoliteRare Earth ElementHydrothermal systemDeposition (aerosol physics)StromatolitesStromatoliteBacterial activityRock-water interactions Hydrothermal systemMicrobial matBacterial activityGeologydescription
AbstractRare earth elements (REE) were investigated in siliceous stromatolites forming in the Specchio di Venere Lake on Pantelleria Island. Chondrite-normalised patterns show significant La enrichments and Eu depletions suggesting that fluids involved in stromatolite growth experienced strong rock-water interactions under hydrothermal conditions. At the same time, enrichments in heavy REE (HREE) with respect to intermediate REE (MREE) suggest that hydrothermal fluids interacted with microbial mats during deposition of the stromatolites. The above-mentioned features suggest that rock-water interactions and bacterial activity were simultaneously recorded in the REE patterns of stromatolites, and can be discriminated in terms of amplitudes of the La anomaly, and the HREE/MREE ratio.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-01-01 |