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
PY - 2020
Y1 - 2020
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.
U2 - 10.1038/s43247-020-00051-0
DO - 10.1038/s43247-020-00051-0
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VL - 1
SP - 1
EP - 9
JO - Communications Earth and Environment
JF - Communications Earth and Environment
SN - 2662-4435
IS - 1
ER -