Temporal trends in vent fluid iron and sulfide chemistry following the 2005/2006 eruption at East Pacific Rise, 9°50′N

Yücel, Mustafa; Luther, George W.

doi:10.1002/ggge.20088

Cited by 14 publications

(12 citation statements)

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“…New lava emerged between 9°46'N and 9°56'N and reached as far as 2 km off axis (Soule et al, 2007) (Figure 1), covering existing biological communities and even some high-temperature vents. Changes in the iron and sulfide contents and speciation of the high-temperature fluids in the 3 years following the 2005/2006 eruption have been also reported (Yucel and Luther, 2013;.…”

Section: Site Description and Sample Selectionmentioning

confidence: 87%

“…Sediment traps have been employed to collect samples in time-series of hydrothermal plume fallout at the Endeavour Segment of the Juan de Fuca Ridge (JdFR) (Dymond and Roth, 1988;Roth and Dymond, 1989;Cowen et al, 2001), 13°N EPR (German et al, 2002) and more recently at EPR 9°50'N (Toner et al, 2009;Adams et al, 2011;Bennett et al, 2011b;Sylvan et al, 2012). In particular, the spatial and temporal variability of vent fluid chemistry at 9°50'N EPR is among the most thoroughly studied of any vent field (Von Damm et al, 1995;Von Damm, 2000;Fornari et al, 2012;Yucel and Luther, 2013). Multiyear time-series of annual to semi-annual sampling at this site have revealed both temporal variability between samplings and differences between vents that are tens of meters apart (Von Damm, 2004;Fornari et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Geochemistry and iron isotope systematics of hydrothermal plume fall-out at East Pacific Rise 9°50′N

et al. 2016

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While gross hydrothermal fluxes entering the ocean are known to be significant, much remains unknown about the fate of this material as it disperses through the oceans, and its impact upon ocean biogeochemistry. Mineral precipitation within hydrothermal plumes removes hydrothermally-sourced metals from solution and also acts to scavenge trace elements from the surrounding water column. Here, we investigate the fate of particulate Fe released from high-temperature hydrothermal venting at EPR 9°50'N and its potential impact on local deep-ocean Fe-isotopic and geochemical budgets. We measured the geochemical composition, mineralogy and Fe isotope systematics of hydrothermal plume products in order to determine whether mineral precipitation imposes characteristic Fe-isotope "fingerprints" for hydrothermally sourced Fe in the deep ocean. Our sampling includes sediment trap deployments after the eruptive event of Jan. 2006, allowing the examination of temporal changes of hydrothermal fluxes over a 160 day period. Results show that Fe isotope composition in the high-temperature vent fluids is rather constant over the sampling period 2004-2008, and that secular variations of δ 56 Fe values of plume particles from-0.03 to-0.91‰ (relative to IRMM-14 standard) could be explained by local processes leading to variable mixing extents of hydrothermal, biogenic and lithogenic particles. Through geochemical modeling, we have calculated the relative abundances of hydrothermal plume components such as sulfides, Fe oxyhydroxides, organic matter, biogenic and lithogenic phases. We demonstrate that Fe isotope fractionation in the hydrothermal plume occurs during the formation and rapid settling of Fe-sulfides that are characterized by δ 56 Fe values ranging from-0.73 ± 0.13‰ to-0.86± 0.13‰, which is systematically lower than the endmember hydrothermal fluids (δ 56 Fe =-0.4‰). This study suggests that both the initial Fe isotope composition of the high-temperature vent fluids and its initial Fe/H 2 S ratio (i.e. Fesulfide precipitation versus Fe-oxyhydroxide precipitation) should impose characteristic Fe isotope "fingerprints" for hydrothermally derived Fe in the deep ocean.

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Section: Site Description and Sample Selectionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Geochemistry and iron isotope systematics of hydrothermal plume fall-out at East Pacific Rise 9°50′N

et al. 2016

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“…Decadal scale variability in hydrothermalism is not uncommon in dynamic volcanic environments (Von Damm et al, 1995;Yücel and Luther, 2013).…”

Section: Pore Water Fe and Mn Distributionsmentioning

confidence: 99%

Hydrothermal sediments are a source of water column Fe and Mn in the Bransfield Strait, Antarctica

Aquilina¹,

Homoky²,

Hawkes³

et al. 2014

Geochimica et Cosmochimica Acta

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Please cite this article as: Aquilina, A., Homoky, W.B., Hawkes, J.A., Lyons, T.W., Mills, R.A., Hydrothermal sediments are a source of water column Fe and Mn in the Bransfield Strait, Antarctica, Geochimica et Cosmochimica Acta (2014), doi: http://dx.doi.org/10.1016/j.gca. 2014.04.003 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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“…This dynamic portion of the MOR system was also a focus site for full suite of continuous and interconnected studies focused on topics ranging from "magma to microbe" (Fornari et al, 2012). They included examination of biological communities, volcanic, magmatic, tectonic and hydrothermal activity, and their chemical imprints on the rocks and fluids expelled within the region (e.g., Fornari et al, 2012;Goss et al, 2010;Kelley et al, 2002;Lutz et al, 2008;Nooner et al, 2014;Soule et al, 2007;Tolstoy et al, 2008;Toomey et al, 2007;Von Damm & Lilley, 2004;White et al, 2006;Yücel & Luther, 2013).…”

Section: Introductionmentioning

confidence: 99%

Seismic Signatures of Hydrothermal Pathways Along the East Pacific Rise Between 9°16′ and 9°56′N

et al. 2017

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We apply wave equation‐based techniques to 2‐D seismic data to characterize the nature of zero‐age upper crust at the East Pacific Rise from 9°16′ to 9°56′N. The final velocity model reveals a number of low‐velocity anomalies, complex in shape, extending down to ~1 km below the seafloor. We attribute them to the presence of hydrothermal flow. Depending on their spatial correlation with the previously identified tectonic discontinuities in bathymetry and presence of venting, we classify them as downgoing and upgoing pathways, respectively. This distinction is not always clear; within the third‐order discontinuities at 9°20′ and 9°37′N, both pathways may be present. The region north of 9°44′N, known for its magmatic robustness and volcanic activity, is represented by five low‐velocity perturbations. Three of these anomalies are spatially correlated with the fourth‐order discontinuities and attributed to the presence of the on‐axis recharge zones. The remaining two anomalies underlie two vent clusters, marked as hydrothermally active sites after the last documented eruption event. These velocity anomalies can be thus identified as the up‐flow pathways or at least their remnants. By comparing our results to the available interdisciplinary data sets, we show that the interaction between the tectono‐magmatic and hydrothermal processes is not straightforward due to different timescales at which they operate. However, for developing, maintaining, and driving vigorous, high‐temperature hydrothermal flow, the high crustal permeability and high thermal regime must coexist in time and space.

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Temporal trends in vent fluid iron and sulfide chemistry following the 2005/2006 eruption at East Pacific Rise, 9°50′N

Cited by 14 publications

References 30 publications

Geochemistry and iron isotope systematics of hydrothermal plume fall-out at East Pacific Rise 9°50′N

Geochemistry and iron isotope systematics of hydrothermal plume fall-out at East Pacific Rise 9°50′N

Hydrothermal sediments are a source of water column Fe and Mn in the Bransfield Strait, Antarctica

Seismic Signatures of Hydrothermal Pathways Along the East Pacific Rise Between 9°16′ and 9°56′N

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