Sulfur geochemistry of peridotite-hosted hydrothermal systems: Comparing the Ligurian ophiolites with oceanic serpentinites

Schwarzenbach, Esther M.; Früh-Green, Gretchen L.; Bernasconi, Stefano M.; Alt, Jeffrey C; Shanks, Wayne C.; Gaggero, Laura; Crispini, Laura

doi:10.1016/j.gca.2012.05.021

Cited by 66 publications

(64 citation statements)

References 102 publications

(180 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…4), and SIO is identified as poorly crystalline quartz. Highly weathered amygdaloidal, basaltic samples are Mineralogical determination using miniaturized laser ablation mass spectrometer 137 consistent with the presence of millerite, which is a lowtemperature calcite-and serpentine-associated mineral (Moody 1976;Anthony 1990;Schwarzenbach & Früh-Green 2009), and quartz is a documented pseudomorph of the olivine phenocrysts (Rex & Scott 1987). The ALP phase was identified to represent the mineralogy of the basaltic host rock to a large extent but in general, chlorite was surrounding the millerite crystals.…”

Section: Ramanmentioning

confidence: 99%

Mineralogical determination in situ of a highly heterogeneous material using a miniaturized laser ablation mass spectrometer with high spatial resolution

Neubeck

Tulej

Ivarsson

et al. 2015

International Journal of Astrobiology

View full text Add to dashboard Cite

Techniques enabling in situ elemental and mineralogical analysis on extraterrestrial planets are strongly required for upcoming missions and are being continuously developed. There is ample need for quantitative and high-sensitivity analysis of elemental as well as isotopic composition of heterogeneous materials. Here we present in situ spatial and depth elemental profiles of a heterogeneous rock sample on a depth-scale of nanometres using a miniaturized laser ablation mass spectrometer (LMS) designed for planetary space missions. We show that the LMS spectra alone could provide highly detailed compositional, three-dimensional information and oxidation properties of a natural, heterogeneous rock sample. We also show that a combination of the LMS and Raman spectroscopy provide comprehensive mineralogical details of the investigated sample. These findings are of great importance for future space missions where quick, in situ determination of the mineralogy could play a role in the process of selecting a suitable spot for drilling.

show abstract

Section: Ramanmentioning

confidence: 99%

Mineralogical determination in situ of a highly heterogeneous material using a miniaturized laser ablation mass spectrometer with high spatial resolution

Neubeck

Tulej

Ivarsson

et al. 2015

International Journal of Astrobiology

View full text Add to dashboard Cite

show abstract

“…Schwarzenbach et al . [], who performed bulk rock analyses of serpentinites and ophicalcites from the Northern Apennines, found δ 34 S ranges between −21.7 and 4.3‰.…”

Section: Overview Of Sulfur Isotopesmentioning

confidence: 99%

Sulfur isotope evolution in sulfide ores from Western Alps: Assessing the influence of subduction-related metamorphism

Giacometti

Evans

Rebay

et al. 2014

Geochem. Geophys. Geosyst.

View full text Add to dashboard Cite

Sulfides entering subduction zones can play an important role in the release of sulfur and metals to the mantle wedge and contribute to the formation of volcanic arc-associated ores. Fractionation of stable sulfur isotopes recorded by sulfides during metamorphism can provide evidence of fluid-rock interactions during metamorphism and give insights on sulfur mobilization. A detailed microtextural and geochemical study was performed on mineralized samples from two ocean floor-related sulfide deposits (Servette and Beth-Ghinivert) in high-pressure units of the Italian Western Alps, which underwent different metamorphic evolutions. The combination of microtextural investigations with d 34 S values from in situ ion probe analyses within individual pyrite and chalcopyrite grains allowed evaluation of the effectiveness of metamorphism in modifying the isotopic record and mobilizing sulfur and metals and have insights on fluid circulation within the slab. Textures and isotopic compositions inherited from the protolith are recorded at Beth-Ghinivert, where limited metamorphic recrystallization is attributed to limited interaction with metamorphic fluids. Isotopic modification by metamorphic processes occurred only at the submillimeter scale at Servette, where local interactions with infiltrating hydrothermal fluid are recorded by metamorphic grains. Notwithstanding the differences recorded by the two deposits, neither underwent intensive isotopic reequilibration or records evidence of intense fluid-rock interaction and S mobilization during metamorphism. Therefore, subducted sulfide deposits dominated by pyrite and chalcopyrite are unlikely to release significant quantities of sulfur to the mantle wedge and to arc magmatism sources at metamorphic grades below the lower eclogite facies.

show abstract

“…By contrast, Rudnick and Walker (2009) noticed that abyssal peridotites sampled near the seafloor are Re-enriched with respect to those coming from greater depths, implying a possible Re addition from seawater. Nevertheless, secondary sulfides are generally considered indicators of the remarkable variations of oxygen and sulfur fugacities in peridotites affected by serpentinization (Frost, 1985;Alt and Shanks, 2003;Frost and Beard, 2007;Delacour et al, 2008;Klein and Bach, 2009;Schwarzenbach et al, 2012), since primary sulfides become obliterated due to progressive desulfurization (sulfide leaching).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Metasomatizing effects of serpentinization-related hydrothermal fluids in abyssal peridotites: new contributions from Hyblean peridotite xenoliths (southeastern Sicily)

Manuella¹,

Ottolini

Carbone

et al. 2016

Lithos

View full text Add to dashboard Cite

Sulfur geochemistry of peridotite-hosted hydrothermal systems: Comparing the Ligurian ophiolites with oceanic serpentinites

Cited by 66 publications

References 102 publications

Mineralogical determination in situ of a highly heterogeneous material using a miniaturized laser ablation mass spectrometer with high spatial resolution

Mineralogical determination in situ of a highly heterogeneous material using a miniaturized laser ablation mass spectrometer with high spatial resolution

Sulfur isotope evolution in sulfide ores from Western Alps: Assessing the influence of subduction-related metamorphism

Metasomatizing effects of serpentinization-related hydrothermal fluids in abyssal peridotites: new contributions from Hyblean peridotite xenoliths (southeastern Sicily)

Contact Info

Product

Resources

About