FN Archimer Export Format PT J TI A late Paleoproterozoic (1.74 Ga) deep‐sea, low‐temperature, iron‐oxidizing microbial hydrothermal vent community from Arizona, USA BT AF Little, Crispin T. S. Johannessen, Karen C Bengtson, Stefan Chan, Clara S Ivarsson, Magnus Slack, John F Broman, Curt Thorseth, Ingunn H. Grenne, Tor ROUXEL, Olivier Bekker, Andrey AS 1:1;2:2;3:3;4:4;5:3,5;6:6;7:7;8:2;9:8;10:9;11:10,11; FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:PDG-REM-GM;11:; C1 School of Earth and Environment, University of Leeds, Leeds, UK Department of Earth Science, University of Bergen, Bergen, Norway Department of Palaeobiology, Swedish Museum of Natural History, Stockholm, Sweden Department of Earth Sciences, University of Delaware, Newark, USA Department of Biology, University of Southern Denmark, Odense M, Denmark U.S. Geological Survey (Emeritus), National Center, Reston, USA Department of Geological Sciences, Stockholm University, Stockholm, Sweden Geological Survey of Norway, Trondheim, Norway Marine Geosciences Research Unit, IFREMER, Plouzané, France Department of Earth and Planetary Sciences, University of California, Riverside, USA Department of Geology, University of Johannesburg, Johannesburg, South Africa C2 UNIV LEEDS, UK UNIV BERGEN, NORWAY SWEDISH MUSEUM NAT HIST, SWEDEN UNIV DELAWARE, USA UNIV SOUTHERN DENMARK, DENMARK US GEOL SURVEY, USA UNIV STOCKHOLM, SWEDEN GEOL SURVEY NORWAY, NORWAY IFREMER, FRANCE UNIV CALIF RIVERSIDE, USA UNIV JOHANNESBURG, SOUTH AFRICA SI BREST SE PDG-REM-GM IN WOS Ifremer UPR copubli-europe copubli-int-hors-europe copubli-sud IF 4.216 TC 14 UR https://archimer.ifremer.fr/doc/00680/79162/81674.pdf https://archimer.ifremer.fr/doc/00680/79162/81677.docx https://archimer.ifremer.fr/doc/00680/79162/81678.mpeg https://archimer.ifremer.fr/doc/00680/79162/81681.mpg https://archimer.ifremer.fr/doc/00680/79162/81682.mpg LA English DT Article DE ;Arizona;Fe‐oxidizing bacteria;hydrothermal vents;jasper;late Paleoproterozoic;Verde mining district AB Modern marine hydrothermal vents occur in a wide variety of tectonic settings and are characterized by seafloor emission of fluids rich in dissolved chemicals and rapid mineral precipitation. Some hydrothermal systems vent only low‐temperature Fe‐rich fluids, which precipitate deposits dominated by iron oxyhydroxides, in places together with Mn‐oxyhydroxides and amorphous silica. While a proportion of this mineralization is abiogenic, most is the result of the metabolic activities of benthic, Fe‐oxidizing bacteria (FeOB), principally belonging to the Zetaproteobacteria. These micro‐organisms secrete micrometer‐scale stalks, sheaths, and tubes with a variety of morphologies, composed largely of ferrihydrite that act as sacrificial structures, preventing encrustation of the cells that produce them. Cultivated marine FeOB generally require neutral pH and microaerobic conditions to grow. Here, we describe the morphology and mineralogy of filamentous microstructures from a late Paleoproterozoic (1.74 Ga) jasper (Fe‐oxide‐silica) deposit from the Jerome area of the Verde mining district in central Arizona, USA, that resemble the branching tubes formed by some modern marine FeOB. On the basis of this comparison, we interpret the Jerome area filaments as having formed by FeOB on the deep seafloor, at the interface of weakly oxygenated seawater and low‐temperature Fe‐rich hydrothermal fluids. We compare the Jerome area filaments with other purported examples of Precambrian FeOB and discuss the implications of their presence for existing redox models of Paleoproterozoic oceans during the “Boring Billion.” PY 2021 PD MAY SO Geobiology SN 1472-4677 PU Wiley / Blackwell VL 19 IS 3 UT 000618620800001 BP 228 EP 249 DI 10.1111/gbi.12434 ID 79162 ER EF