Josef, Jennifer A. et al. (2007): Peridotite dissolution rates in microbial enrichment cultures

Leg/Site/Hole:
ODP 209
Identifier:
2007-087747
georefid

10.2973/odp.proc.sr.209.002.2007
doi

Creator:
Josef, Jennifer A.
Bruce Museum of Arts and Sciences, Greenwich, CT, United States
author

Fisk, Martin R.
Woods Hole Oceanographic Institution, United States
author

Giovannoni, Stephen
Ocean Drilling Program, United States
author

Identification:
Peridotite dissolution rates in microbial enrichment cultures
2007
In: Kikawa, Eiichi, Kelemen, Peter B., Miller, D. Jay, Abe, Natsue, Bach, Wolfgang, Carlson, Richard L., Casey, John F., Chambers, Lynne M., Cheadle, Michael, Cipriani, Anna, Dick, Henry J. B., Faul, Ulrich, Garces, Miguel, Garrido, Carlos J., Gee, Jeffrey S., Godard, Marguerite M., Graham, David W., Griffin, Dale W., Harvey, Jason, Ildefonse, Benoit, Iturrino, Gerardo J., Josef, Jennifer A., Meurer, William P., Paulick, Holger, Rosner, Martin, Schroeder, Timothy, Seyler, Monique, Takazawa, Eiichi, Proceedings of the Ocean Drilling Program; scientific results; drilling mantle peridotite along the Mid-Atlantic Ridge from 14 degrees to 16 degrees N; covering Leg 209 of the cruises of the drilling vessel JOIDES Resolution; Rio de Janeiro, Brazil, to St. George, Bermuda; Sites 1268-1275; 6 May-6 July 2003
Texas A&M University, Ocean Drilling Program, College Station, TX, United States
209
Using peridotite drilled during Ocean Drilling Program Leg 209, a series of enrichment cultures were initiated on board the ship to stimulate microbially enhanced dissolution of olivine. Dissolution was estimated by measured changes in dissolved Li and Si in the media through time (up to 709 days). The results suggest that there was no significant difference between the amounts of dissolved Li and Si in most of the inoculated microbial cultures compared to the control cultures. Alternative explanations for this are that 1. No microbes are living in the culture tubes that can affect the dissolution rates of olivine, 2. The control cultures have microbes effecting the dissolution of olivine as well as the inoculated cultures, 3. Not enough time has passed to build up a large enough microbial population to effect the dissolution of the olivine in the culture tubes, 4. Microbes act to suppress dissolution of olivine instead of enhancing dissolution, and 5. Abiotic dissolution overshadows microbially enhanced dissolution. Further work is required to test these alternatives.
English
Coverage:Geographic coordinates:
North:15.4500
West:-47.0000East: -44.3000
South:14.4000

Igneous and metamorphic petrology; General geochemistry; Atlantic Ocean; biogenic processes; boreholes; cores; effects; experimental studies; geochemistry; harzburgite; igneous rocks; laboratory studies; Leg 209; microorganisms; Mid-Atlantic Ridge; nesosilicates; North Atlantic; Ocean Drilling Program; olivine; olivine group; orthosilicates; peridotites; plutonic rocks; rates; silicates; solution; ultramafics;

.