Isocubanite-chalcopyrite intergrowths in the Mid-Atlantic Ridge 26°S hydrothermal vent sulfides

Fan, Lei; Wang, Guozhi; Holzheid, Astrid; Zoheir, Basem; Shi, Xuefa

doi:10.1016/j.chemer.2021.125795

Cited by 7 publications

(4 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The high-elevation fields are completely composed of pillow basalt, with a flat top and limited sedimentation. In the low-elevation fields, fresh basalt is partially covered by loose sediments, whereas no ultramafic rocks are exposed [28]. Abundant metallic sulfide fragments, vent biota, chimney fragments, and inactive chimneys on slopes and low-lying fields were observed by camera tow surveys [40].…”

Section: Geological Settingmentioning

confidence: 99%

“…Since 2009, investigations and studies on hydrothermal activities in the SMAR have identified several hydrothermal fields, including Xunmei, Deyin, Tongguan, and Zouyu [28][29][30][31][32][33]. Recent research indicates that non-biogenic sediments in the SMAR are primarily derived from hydrothermal sources, the second source was lithogenic components, and the third source was a number of elements scavenged from seawater [34].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Geochemical Characteristics of Seabed Sediments in the Xunmei Hydrothermal Field (26°S), Mid-Atlantic Ridge: Implications for Hydrothermal Activity

Yang,

Li,

Dang

et al. 2024

Minerals

Self Cite

View full text Add to dashboard Cite

The compositions of metalliferous sediments associated with hydrothermal vents can provide key geochemical data for locating seafloor sulfides. In this study, we present the geochemistry of seabed sediments from the Xunmei hydrothermal field (HF) in the South Mid-Atlantic Ridge (SMAR). The results indicate that the sediments are mainly composed of pelagic material (biogenic calcium components), basaltic debris, iron-manganese oxides, and hydrothermal components. The sediments are significantly enriched in Cu, Zn, Fe, and Co deriving from hydrothermal fluids, as well as Mn, V, Mo, U, and P, which are primarily scavenged from seawater. The northeastern Xunmei has the highest concentrations of Cu and Zn, while the northeastern, northern, and southern regions are characterized by great inputs of Fe. Manganese and Mo are mainly enriched in the western and southern parts and show a strong positive correlation, indicating that Mo is mainly scavenged by Mn oxides. Uranium, P, and Fe exhibit strong positive correlations, suggesting that they coprecipitate with Fe from hydrothermal plumes. Vanadium and Co are introduced into sediments in different ways: V is scavenged and coprecipitated by hydrothermal plumes, and Co is derived from sulfide debris. Based on the contents of Cu and Zn and Cu/Fe (0.159), Zn/Fe (0.158), and Fe/Mn (1440) ratios, it can be inferred that a high-temperature hydrothermal vent existed in northeastern Xunmei. In combination with the distribution patterns of the above elements, the hydrothermal vents in the southern part ceased erupting after a short period of activity. In addition, the high Mn anomaly and the high U/Fe ratios at the boundaries of the investigated area indicate the presence of a relatively oxidized environment in southwestern Xunmei.

show abstract

Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geochemical Characteristics of Seabed Sediments in the Xunmei Hydrothermal Field (26°S), Mid-Atlantic Ridge: Implications for Hydrothermal Activity

Yang,

Li,

Dang

et al. 2024

Minerals

Self Cite

View full text Add to dashboard Cite

show abstract

“…Since 2009, investigations and studies on hydrothermal activities on the SMAR have identified several hydrothermal fields, including Xunmei, Deyin, Tongguan, and Zouyu [30][31][32][33][34][35]. Recent research indicates that nonbiogenic sediments on the SMAR are primarily derived from hydrothermal sources, followed by rocks, with a small fraction precipitated from seawater [36].…”

Section: Introductionmentioning

confidence: 99%

“…The high-elevation fields are completely composed of pillow basalt, with a flat top and little sedimentation. In the low-elevation fields, fresh basalt is partially covered by loose sediment, and no ultramafic rocks are exposed [30]. Abundant metallic sulfide fragments, vent biota, chimney fragments, and inactive chimneys on slopes and low-lying fields were observed by camera tow surveys [2].…”

Section: Introductionmentioning

confidence: 99%

Geochemical Characteristics of Surface Sediments in the Xunmei Hydrothermal Field (26°S), Mid-Atlantic Ridge: Implications for Hydrothermal Activity

Yang,

Li,

Dang

et al. 2023

Preprint

View full text Add to dashboard Cite

The compositions of metalliferous sediments which is associated with hydrothermal vents can provide reliable geochemical indicators for the exploration of seafloor sulfides. In this study, surface sediments from the Xunmei hydrothermal field (HF) on the South Mid-Atlantic Ridge (SMAR) were selected, and their major and trace elements were analysed. The results showed that the sediments are composed of pelagic material (calcium biogenic components), basaltic debris, iron-manganese oxides, and a mixture of hydrothermal components. Additionally, the sediments were found to be significantly enriched in Cu, Zn, Fe and Co derived from hydrothermal sources, as well as Mn, V, Mo, U and P, which are primarily scavenged from seawater. The Cu and Zn concentrations are highest in the northeastern part of Xunmei, while the northeastern, northern, and southern parts are characterized by great inputs of hydrothermal Fe. Manganese and Mo are mainly enriched in the western and southern parts and show a strong positive correlation, indicating that Mo is mainly scavenged by Mn oxides. There are high positive correlations among U, P, and Fe, indicating their coprecipitation with Fe from hydrothermal plumes. Vanadium and Co are introduced into sediments in two ways, i.e., V is scavenged and coprecipitates from hydrothermal plumes, and Co is derived from sulfide debris. Based on the variations in Cu and Zn contents and in the Cu/Fe (0.159), Zn/Fe (0.158), and Fe/Mn (1440) ratios, it can be inferred that a high-temperature hydrothermal vent existed in northeastern Xunmei. In combination with the distribution patterns of the above elements, the hydrothermal vents in the southern part ceased erupting after a short period of activity. In addition, the high Mn anomaly and the high U/Fe ratios at the boundaries of the investigated area indicate the presence of a relatively oxidized environment in southwestern Xunmei.

show abstract

Low-temperature magnetic behavior of isocubanite from seafloor hydrothermal deposits in the Okinawa Trough

Kato,

Ohno,

Hatakeyama

et al. 2024

Phys Chem Minerals

View full text Add to dashboard Cite

The characteristic behavior of magnetic remanence correlated with mineralogical textures and composition was observed using low-temperature magnetometry, microscopy, and chemical analysis of three isocubanite samples collected from hydrothermal deposits in the Okinawa Trough and a sample transformed from natural cubanite via heating. Both zero-field remanence acquired at 5 K and field cooling remanence acquired at 300–5 K of all samples sharply decreased with increasing temperature at approximately 100 K. In addition, low-temperature cycling of isothermal remanence at 300 K exhibited a transition at approximately 100 K; remanence increased with decreasing temperature and vice versa. The intensity of remanence at low temperature and sharpness of the transition varied across samples with different compositions and microscopic textures, that is, the presence or absence of chalcopyrite lamellae and their widths. The sample obtained from a hydrothermal chimney, in which the magnetic transition was most clearly observed, was also subjected to X-ray diffraction, Mössbauer spectroscopy, electrical resistivity, and magnetic hysteresis measurements. The obtained results were generally consistent with those reported previously for unnamed mineral CuFe3S4 with an ordered cation arrangement. The low-temperature magnetic behavior of isocubanite possibly depends on the degree of cation ordering and can be regarded as an indicator of chemical composition and cooling history. Therefore, low-temperature magnetometry is useful for the detection of isocubanite and a potentially powerful technique for the prompt estimation of its composition and texture, contributing to our understanding of the formation process of hydrothermal deposits.

show abstract

Isocubanite-chalcopyrite intergrowths in the Mid-Atlantic Ridge 26°S hydrothermal vent sulfides

Cited by 7 publications

References 35 publications

Geochemical Characteristics of Seabed Sediments in the Xunmei Hydrothermal Field (26°S), Mid-Atlantic Ridge: Implications for Hydrothermal Activity

Geochemical Characteristics of Seabed Sediments in the Xunmei Hydrothermal Field (26°S), Mid-Atlantic Ridge: Implications for Hydrothermal Activity

Geochemical Characteristics of Surface Sediments in the Xunmei Hydrothermal Field (26°S), Mid-Atlantic Ridge: Implications for Hydrothermal Activity

Low-temperature magnetic behavior of isocubanite from seafloor hydrothermal deposits in the Okinawa Trough

Contact Info

Product

Resources

About