October 1, 2017 at 10:45 pm

Geology Colloquium | Fe(III) Reducing Bacteria and Formation of ‘Iron Ore Caves,’ Oct. 6

iron ore cave

The Geological Sciences Colloquium Series presents John Senko on “Fe(III) reducing bacteria and the formation of ‘iron ore caves'” on Oct. 6 at 4:10 pm in Clippinger 205.

John Senko

John Senko

Senko is an Associate Professor of Geosciences at the University of Akron.

Abstract: The Quadrilatero Ferrifero (Iron Quadrangle) of Brazil contains extensive banded iron formations (BIF) hosting some of the most productive iron ore deposits in the world. The region also hosts abundant caves (referred to as iron ore caves), which are situated at the interface between brecciated Fe(III)-rich cap-rock (referred to as canga) and the iron ore or BIF. Speleogenesis in such media is surprising, given the low solubility and weathering resistance of the hematite-rich phases that comprise the deposits. However, we have shown that reductive solubilization of Fe by anaerobic, Fe(III)-respiring bacteria (FeRB) could induce the formation of the iron ore caves. The mechanisms by which these organisms induce iron ore caves and controls on their activities will be discussed.

Upcoming Colloquia

Joel Barker of The Ohio State University on “What’s old is new again: Using Arctic mummified forests to predict climate” on Oct. 13 at 4:10 pm in Clippinger 205.

Kevin Mueller of Cleveland State University on “Using plant traits to understand biosphere functions and environmental change: lessons from studies of living plants” on Oct. 20 at 4:10 p.m. in Clippinger 205.

Peter Jahl on “Modifying and Producing Exoplanetary Interior Models for Local Stellar Systems” and Jack Seeley on “Optical and X-Ray Diffraction Analysis of Shock Metamorphosed Knox Group Dolostone from Wells Creek Crater, TN (Part II)” on Oct. 27 at 4:10 p.m. in Clippinger 205. Both are Geological Sciences graduate students.

Joshua Miller of the University of Cincinnati on “Tracking ecological change through the Anthropocene and beyond: Insights for paleoecology and conservation biology from bones on the landscape” on Nov. 3 at 4:10 p.m. in Clippinger 205.

Michal Kowalewski of the University of Florida on “Tales Told by Dead Shells: Paleobiological Approaches to Historical Ecology and Conservation” on Nov. 8 at 2 p.m. in Walter Hall 235.

Kenneth Brown of West Virginia University on “Crystals as archives into Igneous systems and processes: exploring potassium feldspar megacrysts in granites and granodiorites” on Nov. 17 at 4:10 p.m. in Clippinger 205.

Lindsey Schafer on “Statistical analysis of mining parameters to create empirical models to predict mine pool formation in underground coal mines” and Fred Twumasi on “Modeling of hydrological data to predict mine pool formation and possible discharge locations in underground mines” on Dec. 1 at 4:10 p.m. in Clippinger 205. Both are Geological Sciences graduate students.

Leave a Reply

Your email address will not be published. Required fields are marked *