Volatile‐Rich Hydrothermal Plumes Over the Southern Central Indian Ridge, 24°49’S: Evidence for a New Hydrothermal Field Hosted by Ultramafic Rocks

Surya Prakash, L.; John Kurian, P.; Resing, J. A.; Tsunogai, U.; Srinivas Rao, A.; Sen, K.; Lupton, J. E.; Baumberger, T.; Prajith, A.; Roy, P.

doi:10.1029/2022gc010452

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Volatile‐Rich Hydrothermal Plumes Over the Southern Central Indian Ridge, 24°49’S: Evidence for a New Hydrothermal Field Hosted by Ultramafic Rocks

2022
By Surya Prakash, L. ; John Kurian, P. ; Resing, J. A. ; ...
Source: Geochemistry, Geophysics, Geosystems, 23(10)

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Journal Title:

Geochemistry, Geophysics, Geosystems
Personal Author:

Surya Prakash, L. ; John Kurian, P. ; Resing, J. A. ; Tsunogai, U. ; Srinivas Rao, A. ; ... More +

Surya Prakash, L. ; John Kurian, P. ; Resing, J. A. ; Tsunogai, U. ; Srinivas Rao, A. ; Sen, K. ; Lupton, J. E. ; Baumberger, T. ; Prajith, A. ; Roy, P. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CIMRS (Cooperative Institute for Marine Resources Studies) ; PMEL (Pacific Marine Environmental Laboratory)

OAR (Oceanic and Atmospheric Research) ; CIMRS (Cooperative Institute for Marine Resources Studies) ; PMEL (Pacific Marine Environmental Laboratory) Less -
Description:

Water column physico-chemical studies were conducted over the southern Central Indian Ridge between 24°44’S and 25°52’S to identify and chemically characterize seafloor hydrothermal activity. High turbidity values were observed between 2300 and 2700 m with two distinct layers, between water depths of 2320–2500 m and 2510–2650 m, at two closely spaced CTD stations at 24°48.62’S (CTD-17-P5) and 24°48.68’S (CTD-17-P8). Elevated concentrations of dissolved Mn (DMn: 19–112 nM), dissolved Fe (DFe: 33–88 nM), methane (CH4: 32–246 nM), elevated δ 3He values (28%–88%), and stable carbon isotope ratios of CH4 confirm the hydrothermal origin. In plume layer-1, the maximum concentrations were observed at
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Geochemistry And Petrology Geophysics
Source:

Geochemistry, Geophysics, Geosystems, 23(10)
DOI:

https://doi.org/10.1029/2022gc010452
ISSN:

1525-2027;1525-2027;
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PDF
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American Geophysical Union (AGU)
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Journal Article
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https://creativecommons.org/licenses/by-nc-nd/4.0/
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CC BY-NC-ND
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Library
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urn:sha256:8a8eadb13df8243c5731deea0bdc1837bb385f9cadbd65e0d04594aff496cbea
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https://repository.library.noaa.gov/view/noaa/54802/noaa_54802_DS1.pdf
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