title: Seep-carbonate lamination controlled by cyclic particle flux.
abstract: 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.
authors.affiliation: MARUM - Center for Marine and Environmental Sciences and Department of Geosciences, University of Bremen, 28334 Bremen, Germany.|IFREMER, Marine Geosciences Research Unit, Centre Bretagne, 29280 Plouzané, France.
authors.forename: Tobias
authors.initials: T
authors.lastname: Himmler
authors.affiliation: IFREMER, Marine Geosciences Research Unit, Centre Bretagne, 29280 Plouzané, France.
authors.forename: Germain
authors.initials: G
authors.lastname: Bayon
authors.affiliation: MARUM - Center for Marine and Environmental Sciences and Department of Geosciences, University of Bremen, 28334 Bremen, Germany.|Geological Survey of Denmark and Greenland, DK-1350 Copenhagen K, Denmark.
authors.forename: David
authors.initials: D
authors.lastname: Wangner
authors.affiliation: Institute of Geosciences, Johannes Gutenberg University Mainz, 55128 Mainz, Germany.
authors.forename: Frieder
authors.initials: F
authors.lastname: Enzmann
authors.affiliation: Institute of Geology, University of Hamburg, 20146 Hamburg, Germany.|Department for Geodynamics and Sedimentology, University of Vienna, 1090 Vienna, Austria.
authors.forename: Jörn
authors.initials: J
authors.lastname: Peckmann
authors.affiliation: MARUM - Center for Marine and Environmental Sciences and Department of Geosciences, University of Bremen, 28334 Bremen, Germany.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Bohrmann