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Publication details

Document type
Conference papers

Document subtype
Abstract

Title
Ore component mobility, transport and mineralization at mid-oceanic ridges: a stable isotopes (Zn, Cu and Fe) study of the Rainbow massif (Mid-Atlantic Ridge 36°14’N)

Participants in the publication
Debret B. (Author)
Beunon H. (Author)
Mattielli N. (Author)
Andreani M. (Author)
Ribeiro da Costa I. (Author)
Dep. Geologia
 Escartín J. (Author)

Summary
Ultramafic hosted hydrothermal deposits are ubiquitous along slow-spreading ridges such as the Mid-Atlantic Ridge (MAR; e.g., Ashadzé, Rainbow, Lost City) where they exert a major control on economically important elements (e.g., Zn, Cu, Ni) cycling. However, the origin of metal mobility in these environments remains unclear. Here we use Zn (δ66Zn), Cu (δ65Cu) and Fe (δ56Fe) stable isotopes to unravel the reaction pathway that produced hydrothermal fluids below venting areas in the Rainbow massif (MAR 36°14’N). Specifically, we explore the mobility of metals during: (1) the serpentinization of the Rainbow massif basement in a seawater dominated system at low temperature (< 250°C) and (2) the subsequent high temperature (>350°C) mineralization of serpentinites through seawater-derived fluids that interacted with gabbro prior to interact with serpentinite near hydrothermal sites (stockworks). We show that the mobility of metals in hydrothermal fluids can be enhanced by both peridotite interaction with seawater or with fluid that interacted with deeper mafic bodies and then flowed to the surface. These processes generate hydrothermal deposits with distinct metal signatures.

Date of Submisson/Request
2018-09-03
Date of Acceptance
2018-10-14
Date of Publication
2018-11-20

Institution
Royal Society of London (UK)

Event
Royal Society of London Meeting "Serpentinites in the Earth System"

Publication Identifiers

Address
London (UK)

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APA
Debret B., Beunon H., Mattielli N., Andreani M., Ribeiro da Costa I., Escartín J., (2018). Ore component mobility, transport and mineralization at mid-oceanic ridges: a stable isotopes (Zn, Cu and Fe) study of the Rainbow massif (Mid-Atlantic Ridge 36°14’N). Royal Society of London Meeting "Serpentinites in the Earth System", -

IEEE
Debret B., Beunon H., Mattielli N., Andreani M., Ribeiro da Costa I., Escartín J., "Ore component mobility, transport and mineralization at mid-oceanic ridges: a stable isotopes (Zn, Cu and Fe) study of the Rainbow massif (Mid-Atlantic Ridge 36°14’N)" in Royal Society of London Meeting "Serpentinites in the Earth System", London (UK), 2018, pp. -, doi:

BIBTEX
@InProceedings{41147, author = {Debret B. and Beunon H. and Mattielli N. and Andreani M. and Ribeiro da Costa I. and Escartín J.}, title = {Ore component mobility, transport and mineralization at mid-oceanic ridges: a stable isotopes (Zn, Cu and Fe) study of the Rainbow massif (Mid-Atlantic Ridge 36°14’N)}, booktitle = {Royal Society of London Meeting "Serpentinites in the Earth System"}, year = 2018, pages = {-}, address = {London (UK)}, publisher = {} }