Delacour, Adelie (2007): Linking serpentinization, fluid fluxes mass transfer and microbial activity at Lost City; geochemical and isotopic constraints

Leg/Site/Hole:
IODP 304 U1309
IODP 305 U1309
Identifier:
2011-031284
georefid

1012-8522
issn

10.3929/ethz-a-005502496
doi

Creator:
Delacour, Adelie
author

Identification:
Linking serpentinization, fluid fluxes mass transfer and microbial activity at Lost City; geochemical and isotopic constraints
2007
Dissertationen, Eidgenoessische Technische Hochschule Zuerich
Eidgenoessische Technische Hochschule Zuerich, Zurich, Switzerland
17198
This study presents petrological, geochemical and isotopic (Sr, Nd, S and C) data on samples collected by submersible at the peridotite-dominated southern wall and drilled by the Integrated Ocean Drilling Program (IODP) at the gabbroic central dome (Site U1309) of the Atlantis Massif. The motivation of these studies is to understand lateral and vertical heterogeneities in crustal architecture, deformation, fluid fluxes, serpentinization and alteration conditions within the massif. The main goals of this thesis were: (1) to understand variations in conditions of serpentinization, and chemical and mineralogical changes accompanying crustal aecretion and alteration; (2) to quantify fluid-rock interaction and fluid-fluxes, and to determine their influence on the chemical compositions of the basement rocks; (3) to characterize the origin and evolution of volatiles in the peridotite hosted Lost City hydrothermal system; (4) to identify the linksks between serpentinization and microbial activity at Lost City; and (5) to compare the metamorphic and alteration conditions between the southern wall and the central dome of the massif.
Coverage:Geographic coordinates:
North:30.2000
West:-42.1500East: -42.0000
South:30.0000

Igneous and metamorphic petrology; Isotope geochemistry; alkaline earth metals; Atlantic Ocean; Atlantis Massif; carbon; crust; Expeditions 304/305; fluid dynamics; igneous rocks; Integrated Ocean Drilling Program; IODP Site U1309; isotopes; Lost City hydrothermal field; mass transfer; metals; metamorphic core complexes; metamorphism; metasomatism; microorganisms; Mid-Atlantic Ridge; neodymium; North Atlantic; oceanic crust; peridotites; plutonic rocks; rare earths; serpentinization; strontium; sulfur; ultramafics; volatiles; water-rock interaction;

.