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Himmler, Tobias; Bayon, Germain; Wangner, David Johannes; Enzmann, Frieder; Peckmann, Jörn; Bohrmann, Gerhard (2016): Limestone petrography and geochemical composition at ROV station GeoB12353-11 [dataset publication series]. PANGAEA,, Supplement to: Himmler, T et al. (2016): Seep-carbonate lamination controlled by cyclic particle flux. Scientific Reports, 6, 37439,

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Authigenic carbonate build-ups develop at seafloor methane-seeps, where microbially mediated sulphate-dependent anaerobic oxidation of methane facilitates carbonate precipitation. Despite being valuable recorders of past methane seepage events, their role as archives of atmospheric processes has not been examined. Here we show that cyclic sedimentation pulses related to the Indian monsoon in concert with authigenic precipitation of methane-derived aragonite gave rise to a well-laminated carbonate build-up within the oxygen minimum zone off Pakistan (northern Arabian Sea). U?Th dating indicates that the build-up grew during past ~1,130 years, creating an exceptional high-resolution archive of the Indian monsoon system. Monsoon-controlled formation of seep-carbonates extends the known environmental processes recorded by seep-carbonates, revealing a new relationship between atmospheric and seafloor processes.
Latitude: 24.807417 * Longitude: 63.994067
Date/Time Start: 2007-11-20T16:30:00 * Date/Time End: 2007-11-20T16:30:00
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