Microbial production of isotopically light iron(II) in a modern chemically precipitated sediment and implications for isotopic variations in ancient rocks
Article first published online: 30 MAR 2010
© 2010 Blackwell Publishing Ltd
Volume 8, Issue 3, pages 197–208, June 2010
How to Cite
TANGALOS, G. E., BEARD, B. L., JOHNSON, C. M., ALPERS, C. N., SHELOBOLINA, E. S., XU, H., KONISHI, H. and RODEN, E. E. (2010), Microbial production of isotopically light iron(II) in a modern chemically precipitated sediment and implications for isotopic variations in ancient rocks. Geobiology, 8: 197–208. doi: 10.1111/j.1472-4669.2010.00237.x
- Issue published online: 13 MAY 2010
- Article first published online: 30 MAR 2010
- Received 14 September 2009; accepted 6 March 2010
Fig. S1 (A) Location of study site located in Shasta County, northern California. (B) Tributaries carry acid mine drainage (AMD) from Iron Mountain to the Spring Creek Reservoir.
Fig. S2 Percent of total citrate?dithionite (CD)-extractable Fe soluble in 0.5 m HCl (1.5 g of pore fluid-free sediment in 10 mL) over time.
Fig. S3 X-ray diffraction (XRD) analyses of anaerobically dried SCAKR sediment, showing the dominant mineralogy as quartz, kaolinite, and the Fe(III) oxides goethite and ferrihydrite.
Fig. S4 Transmission electron microscopic (TEM) images and selected area electron diffraction (SAED) patterns of anaerobically dried SCAKR sediment showing the presence of goethite (A, B) and ferrihydrite (C, D) form aggregates of nanometer-scale grains. These aggregates were generally associated with clay minerals [smectite (S), kaolinite (K) and halloysite] or feldspar (E, F).
Table S1 Summary of geochemical measurements from SCAKR sediment cores and the sediment incubation experiments.
Table S2 Summary of Fe isotope measurements from SCAKR sediment cores and the sediment incubation experiment.
Table S3 Abundance of culturable DIRM at ~150 cm depth in SCAKR core 06GTIM-B.
Table S4 Phylogenetic assignments for the 16S rRNA gene sequences (64 total) from the SCAKR sediment clone library.
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