Edinburgh Research Explorer

Microbial endolithic colonization and the geochemical environment in young seafloor basalts

Research output: Contribution to journalArticle

  • C. S. Cockell
  • Peter van Calsteren
  • J. Fred W. Mosselmans
  • Ian A. Franchi
  • Iain Gilmour
  • Laura Kelly
  • Karen Olsson-Francis
  • Diane Johnson
  • JC24 Shipboard Sci Party
  • Charles Cockell

Related Edinburgh Organisations

Original languageEnglish
Pages (from-to)17-30
Number of pages14
JournalChemical Geology
Volume279
Issue number1-2
DOIs
StatePublished - 3 Dec 2010

Abstract

The colonization and weathering of young seafloor basaltic glass from the mid-Atlantic Ridge was examined. Microorganisms were localised to fractures in the surface of the basalt and grew on the surfaces of material in the fractures. XAS. Raman spectroscopy and NanoSIMS analysis of the fracture-filling material shows that it contains non-crystallised iron-enriched altered glass and poorly ordered iron oxides. Organisms, which in places develop into contiguous biofilms, develop on the surface of the material. No putative biogenic alteration textures were observed in the basaltic glass at the fracture boundaries suggesting that the microbial community is restricted to the secondary alteration products. Microbial culturing shows the presence of heterotrophic bacteria including Sufitobacter and Halomonas consistent with observations of photic zone detritus associated with fracture-filling material. These data show that the interior of fresh basaltic glass is an endolithic habitat for microorganisms, but that the glass itself is not a primary source of cations or energy for the developing communities. (C) 2010 Elsevier B.V. All rights reserved.

    Research areas

  • Basaltic glass, Endoliths, Palagonite, Mid-Atlantic Rift, Bacteria, ONTONG JAVA PLATEAU, OCEANIC-CRUST, DEEP-SEA, VOLCANIC GLASS, BIOMASS PRODUCTION, SILICATE-GLASSES, OXIDATION-STATES, DRILL CORE, IRON, DIVERSITY

ID: 1495560