TY - JOUR
T1 - Magmatic volatiles episodically flush oceanic hydrothermal systems as recorded by zoned epidote
AU - Fox, Stephen
AU - Katzir, Yaron
AU - Bach, Wolfgang
AU - Schlicht, Lucy
AU - Glessner, Justin
N1 - Funding Information:
This study was funded by the German-Israeli Foundation for Scientific Research and Development grant #I-1357-301.8/2016 to W. Bach and Y. Katzir.
Publisher Copyright:
© 2020, The Author(s).
PY - 2020/11/25
Y1 - 2020/11/25
N2 - Circulation of seawater at oceanic spreading centers extracts heat, drives rock alteration, and transports leached metals to shallower levels of the crust, where they may precipitate and form ore deposits. Crystallization of the lower crust, may exsolve and introduce magmatic volatiles into the seawater-dominant system. However, the role of magmatic volatiles added to the hydrothermal system, including pathways of these fluids are lesser known. Here we present coupled in-situ strontium isotope and rare earth element data of distinct domains in epidote, a common hydrothermal mineral throughout the Troodos ophiolite, to track magmatic fluid input and flow. Epidote crystal domains characterize three distinct strontium isotope-rare earth element signatures—suggesting sequential growth from magma-derived fluids (0.704, negative europium anomalies), rock-buffered fluids (0.7055, positive europium anomalies) and seawater-derived fluids (0.7065, negative cerium anomalies). Epidote records episodic fluxing of magmatic fluids from plagiogranites, through epidosites in the upflow zone and into metal ore deposits.
AB - Circulation of seawater at oceanic spreading centers extracts heat, drives rock alteration, and transports leached metals to shallower levels of the crust, where they may precipitate and form ore deposits. Crystallization of the lower crust, may exsolve and introduce magmatic volatiles into the seawater-dominant system. However, the role of magmatic volatiles added to the hydrothermal system, including pathways of these fluids are lesser known. Here we present coupled in-situ strontium isotope and rare earth element data of distinct domains in epidote, a common hydrothermal mineral throughout the Troodos ophiolite, to track magmatic fluid input and flow. Epidote crystal domains characterize three distinct strontium isotope-rare earth element signatures—suggesting sequential growth from magma-derived fluids (0.704, negative europium anomalies), rock-buffered fluids (0.7055, positive europium anomalies) and seawater-derived fluids (0.7065, negative cerium anomalies). Epidote records episodic fluxing of magmatic fluids from plagiogranites, through epidosites in the upflow zone and into metal ore deposits.
UR - http://www.scopus.com/inward/record.url?scp=85102440552&partnerID=8YFLogxK
U2 - 10.1038/s43247-020-00051-0
DO - 10.1038/s43247-020-00051-0
M3 - Article
SN - 2662-4435
VL - 1
SP - 1
EP - 9
JO - Communications Earth and Environment
JF - Communications Earth and Environment
IS - 1
M1 - 52
ER -