Accumulation rates of hydrothermal metalliferous sediments in the Lau Basin, S. W. Pacific

1986 ◽  
Vol 6 (1) ◽  
pp. 51-56 ◽  
Author(s):  
D. S. Cronan ◽  
R. Hodkinson ◽  
D. D. Harkness ◽  
S. A. Moorby ◽  
G. P. Glasby
Keyword(s):  
Accumulation Rates ◽  
Lau Basin ◽  
Metalliferous Sediments

Metal accumulation rates in East Pacific Rise metalliferous sediments

1983 ◽  
Vol 52 (3-4) ◽  
pp. 227-239 ◽  
Author(s):  
S.P. Varnavas ◽  
J. Papaioannou
Keyword(s):  
Metal Accumulation ◽  
East Pacific Rise ◽  
Accumulation Rates ◽  
Metalliferous Sediments ◽  
East Pacific

A SUBDUCTION ZONE-SPREADING RIDGE TRANSITION SIGNATURE PRESERVED IN RECENT VOLCANIC ACTIVITY IN THE NE LAU BASIN

2017 ◽  
Author(s):  
Valerie Finlayson ◽  
◽  
Jasper Konter ◽  
Kenneth H. Rubin ◽  
Nicole X. Nie ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Volcanic Activity ◽  
Recent Volcanic Activity ◽  
Spreading Ridge ◽  
Lau Basin

SEDIMENT ACCUMULATION RATES QUANTIFIED WITH COSMOGENIC NEON-21 ON A GLACIAL MORAINE, BLOODY CANYON, CA

2017 ◽  
Author(s):  
Daniel Morgan ◽  
◽  
Greg Balco ◽  
Alison Cribb ◽  
J. Warner Cribb ◽  
...  
Keyword(s):  
Sediment Accumulation ◽  
Accumulation Rates

SEDIMENT ACCUMULATION RATES AND TRACE METAL INPUT HISTORY IN LAKE MANASSAS AND THE OCCOQUAN RESERVOIR, VIRGINIA, USA

2019 ◽  
Author(s):  
Grace Rihl ◽  
◽  
Ben K. Odhiambo ◽  
Leanna Giancarlo ◽  
Daniel Arango
Keyword(s):  
Trace Metal ◽  
Sediment Accumulation ◽  
Accumulation Rates

scholarly journals Mineralogical and Geochemical Signatures of Metalliferous Sediments in Wocan-1 and Wocan-2 Hydrothermal Sites on the Carlsberg Ridge, Indian Ocean

Minerals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 26 ◽  
Author(s):  
Samuel Olatunde Popoola ◽  
Xiqiu Han ◽  
Yejian Wang ◽  
Zhongyan Qiu ◽  
Ying Ye ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Volcanic Glass ◽  
Mineral Chemistry ◽  
Hydrothermal Systems ◽  
Bulk Sediment ◽  
Sediment Samples ◽  
Metalliferous Sediments ◽  
Metalliferous Sediment ◽  
Carlsberg Ridge ◽  
Hydrothermal Environments

In this paper, we conduct a comparative study on the mineralogy and geochemistry of metalliferous sediment collected near the active hydrothermal site (Wocan-1) and inactive hydrothermal site (Wocan-2) from Wocan Hydrothermal Field, on the Carlsberg Ridge (CR), northwest Indian Ocean. We aim to understand the spatial variations in the primary and post-depositional conditions and the intensity of hydrothermal circulations in the Wocan hydrothermal systems. Sediment samples were collected from six stations which includes TVG-07, TVG-08 (Wocan-1), TVG-05, TVG-10 (Wocan-2), TVG-12 and TVG-13 (ridge flanks). The mineralogical investigations show that sediment samples from Wocan-1 and Wocan-2 are composed of chalcopyrite, pyrite, sphalerite, barite, gypsum, amorphous silica, altered volcanic glass, Fe-oxides, and hydroxides. The ridge flank sediments are dominated by biogenic calcite and foraminifera assemblages. The bulk sediment samples of Wocan-1 have an elevated Fe/Mn ratio (up to ~1545), with lower U contents (<7.4 ppm) and U/Fe ratio (<~1.8 × 10−5). The sulfide separates (chalcopyrite, pyrite, and sphalerite) are enriched in Se, Co, As, Sb, and Pb. The calculated sphalerite precipitation temperature (Sph.PT) yields ~278 °C. The sulfur isotope (δ34S) analysis returned a light value of 3.0–3.6‰. The bulk sediment samples of Wocan-2 have a lower Fe/Mn ratio (<~523), with high U contents (up to 19.6 ppm) and U/Fe ratio (up to ~6.2 × 10−5). The sulfide separates are enriched in Zn, Cu, Tl, and Sn. The calculated Sph.PT is ~233 °C. The δ34S returned significant values of 4.1–4.3‰ and 6.4–8.7‰ in stations TVG-10 and TVG-05, respectively. The geochemical signatures (e.g., Fe/Mn and U/Fe ratio, mineral chemistry of sulfides separates, and S-isotopes and Sph.PT) suggest that sediment samples from Wocan-1 are located near intermediate–high temperature hydrothermal discharge environments. Additionally, relatively low δ34S values exhibit a lower proportion (less than 20%) of seawater-derived components. The geochemical signatures suggest that sediment samples from Wocan-2 has undergone moderate–extensive oxidation and secondary alterations by seawater in a low–intermediate temperature hydrothermal environments. Additionally, the significant δ34S values of station TVG-05 exhibit a higher estimated proportion (up to 41%) of seawater-derived components. Our results showed pervasive hydrothermal contributions into station TVG-08 relative to TVG-07, it further showed the increased process of seafloor weathering at TVG-05 relative to TVG-10.

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