Noble gases in sulfide deposits of modern deep-sea hydrothermal systems: Implications for heat fluxes and hydrothermal fluid processes

Zeng, Zhigang; Niedermann, Samuel; Chen, Shuai; Wang, Xiaoyuan; Li, Zhaoxue

doi:10.1016/j.chemgeo.2015.05.007

Cited by 23 publications

(30 citation statements)

References 65 publications

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“…At the EPR near 13°N, 11°N, and 1-2°S, the KHF, EHF, the MAR near 13°S, the area A, and the S99HF, the seafloor hydrothermal sulfides are hosted by mid-ocean ridge basalts (MORBs) (e.g., Kumagai et al, 2008;Zeng et al, 2010Zeng et al, , 2014Zeng et al, , 2015a. The KHF is situated on basaltic rocks, but the hydrothermal fluids also interact with and circulate through ultramafic rocks (Nakamura et al, 2009).…”

Section: Geological Setting and Sample Mineralogymentioning

confidence: 99%

“…The KHF is situated on basaltic rocks, but the hydrothermal fluids also interact with and circulate through ultramafic rocks (Nakamura et al, 2009). In the LHF, the hydrothermal sulfide deposit is associated with ultramafic rocks located in a debris flow consisting of heterogeneous ultramafic and mafic intrusive rocks, including serpentinized harzburgite, serpentinized dunite, gabbronorite, and olivine-bearing basalt (e.g., Petersen et al, 2009;Zeng et al, 2014Zeng et al, , 2015a. In addition, in the North Fiji Basin, the S99HF is located immediately south of the triple junction point at 16°50´S and is hosted by basaltic rocks, the trace element composition of which indicates that magma generation was influenced by two different sources: normal mid-ocean ridge basalt (N-MORB) and ocean island basalt (OIB)-related to enriched mid-ocean ridge basalt (E-MORB) Nohara et al, 1994;Koschinsky et al, 2002;Kim et al, 2006).…”

Section: Geological Setting and Sample Mineralogymentioning

confidence: 99%

“…All sulfide samples were then carefully picked manually under a binocular microscope to avoid sulfates and oxides, and were ultrasonically cleaned in ultrapure alcohol to remove any seawater influences, e.g., the presence of salts and altered seawater products. Then, all the samples were ground to a powder finer than 63 μm in an agate mortar (Zeng et al, 2014(Zeng et al, , 2015a. Fine-grained glass powder was used as an abrasive to polish the mortar and pestle between samples to exclude cross-contamination.…”

Section: Sampling Proceduresmentioning

confidence: 99%

“…Because most of the samples were fine-grained and intergrown, an integrated mechanical separating method was used to obtain a monomineralic sulfide or mineral aggregate. The separation methods included a high-frequency dielectric splitter, magnetic separator, and electromagnetic separator (Zeng et al, 2014(Zeng et al, , 2015a. All sulfide samples were then carefully picked manually under a binocular microscope to avoid sulfates and oxides, and were ultrasonically cleaned in ultrapure alcohol to remove any seawater influences, e.g., the presence of salts and altered seawater products.…”

Section: Sampling Proceduresmentioning

confidence: 99%

“…All sample chips were crushed with an agate mortar and pestle and sieved to select sulfide grains between 50 μm and 2 mm in size (Zeng et al, 2014(Zeng et al, , 2015a. The sulfides were separated from non-sulfide minerals, e.g., sulfates and amorphous silica, via ethanol elutriation (Zeng et al, 2014(Zeng et al, , 2015a.…”

Section: Sampling Proceduresmentioning

confidence: 99%

See 4 more Smart Citations

Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation

Zeng

Chen

et al. 2017

Ore Geology Reviews

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Section: Geological Setting and Sample Mineralogymentioning

confidence: 99%

Section: Geological Setting and Sample Mineralogymentioning

confidence: 99%

Section: Sampling Proceduresmentioning

confidence: 99%

Section: Sampling Proceduresmentioning

confidence: 99%

Section: Sampling Proceduresmentioning

confidence: 99%

See 3 more Smart Citations

Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation

Zeng

Chen

et al. 2017

Ore Geology Reviews

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Volatile element isotopes of submarine hydrothermal mineral deposits in the Western Pacific

Ooki

Kagoshima

Takahata

et al. 2016

Geochem Geophys Geosyst

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The abundance and isotopic compositions of volatile elements trapped in fluid inclusions of submarine hydrothermal mineral deposits in Western Pacific subduction zones (Okinawa Trough, Izu‐Bonin arc, Mariana Trough, and Lau Basin) and in Kuroko ores in northeastern Japan are presented. The helium isotopic compositions corrected for air contribution of the Okinawa and Mariana troughs, ranging 4.49–7.68 Ra are lower than those of the Izu‐Bonin and Lau Basin, 7.62–8.91 Ra. This characteristic might reflect the differences in regional tectonic setting. The Okinawa and Mariana troughs are related to back‐arc spreading with strong graben sedimentary signature, whereas the Izu‐Bonin arc is associated with island arc magmatism. The arc contribution to the Lau Basin volcanism is significantly strong, even though it is assigned to back‐arc spreading. Nitrogen isotopes can also be explained by a similar hypothesis, whereas argon and carbon isotopes cannot be used to discriminate tectonic setting. δ13C–CO2/3He and δ15N–N2/36Ar diagrams elucidate the source of carbon and nitrogen. The MOR‐type mantle contributions to carbon are mostly smaller in the Okinawa and Mariana troughs (ranging 0.06–8.9% with the average of 2.4%) than in the Izu‐Bonin and Lau Basin (2.1–25% with the average of 7.7%). The sedimentary contributions to nitrogen are larger in the Okinawa and Mariana troughs (11–65% with the average of 35%) than in the Izu‐Bonin and Lau Basin (4–24% with the average of 15%), and the Kuroko samples agree well with the latter. Carbon and nitrogen fluxes are again higher in Okinawa trough than in Izu‐Bonin arc.

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The evolution of crystal‐poor rhyolite in the middle Okinawa Trough and its implications for the state of magma chamber

Luo,

Zeng,

Chen

et al. 2024

Geological Journal

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The crystal‐poor rhyolitic pumice is the product of extreme magma differentiation and is characterized by highly vesicular, honeycomb‐like structure. However, little is known about the evolutionary history and the time of volatile saturation of the pumice‐forming melt. A crystal‐poor rhyolitic pumice (TVG7‐1) has been collected from the Yoron Hole hydrothermal field in the middle Okinawa Trough, a young continental margin back‐arc basin in the western Pacific. This study conducted a detailed analysis on the texture and in situ chemical composition of plagioclase, orthopyroxene and Fe‐Ti oxides to reveal the evolution process, storage state and eruption triggers of eruptible silicic melt. Texture and zoning of specific minerals and mineral populations suggest a magmatic evolution history of open system. Additionally, the hollow reentrant texture, as well as results from plagioclase‐liquid hygrometers, confirm a water‐rich melt pocket. The exsolution of volatiles (H2O, etc.), in this melt pocket, will contribute to local oxidation conditions, which may have been recorded by the concordant behaviour of FeO and An in plagioclase. Then, the overpressure caused by volatile exsolution would destabilize the magma chamber, which will eventually be broken by magma mixing/recharge, and lead to violent melt evacuation. Consequently, crystal size distribution (CSD) provides a new perspective on understanding the kinetic effect of magma mixing/recharge in the Okinawa Trough, especially on the mineral populations. Our study reveals the petrogenesis of crystal‐poor rhyolite within the framework of the mush model, refines the magma evolution history and demonstrates that pumice magma reaches volatile saturation before the eruption.

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Noble gases in sulfide deposits of modern deep-sea hydrothermal systems: Implications for heat fluxes and hydrothermal fluid processes

Cited by 23 publications

References 65 publications

Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation

Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation

Volatile element isotopes of submarine hydrothermal mineral deposits in the Western Pacific

The evolution of crystal‐poor rhyolite in the middle Okinawa Trough and its implications for the state of magma chamber

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