Amy Gartman, PhD
I lead the USGS Global Marine Minerals project, which you can learn more about here. My work focuses on the geochemistry of marine minerals including all aspects of water-rock interactions such as precipitation, alteration, and the role of nanoparticles in mineral accumulation.
Science and Products
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Boiling-induced formation of colloidal gold in black smoker hydrothermal fluids Boiling-induced formation of colloidal gold in black smoker hydrothermal fluids
Gold colloids occur in black smoker fluids from the Niua South hydrothermal vent field, Lau Basin (South Pacific Ocean), confirming the long-standing hypothesis that gold may undergo colloidal transport in hydrothermal fluids. Six black smoker vents, varying in temperature from 250 °C to 325 °C, were sampled; the 325 °C vent was boiling at the time of sampling and the 250 °C fluids were...
Authors
Amy Gartman, Mark Hannington, John W. Jamieson, Ben Peterkin, Dieter Garbe-Schonberg, Alyssa J Findlay, Sebastian Fuchs, Tom Kwasnitschka
Arctic deep-water ferromanganese-oxide deposits reflect the unique characteristics of the Arctic Ocean Arctic deep-water ferromanganese-oxide deposits reflect the unique characteristics of the Arctic Ocean
Little is known about marine mineral deposits in the Arctic Ocean, an ocean dominated by continental shelf and basins semi-closed to deep-water circulation. Here, we present data for ferromanganese crusts and nodules collected from the Amerasia Arctic Ocean in 2008, 2009, and 2012 (HLY0805, HLY0905, HLY1202). We determined mineral and chemical compositions of the crusts and nodules and...
Authors
James R. Hein, Natalia Konstantinova, Mariah Mikesell, Kira Mizell, Jessica N. Fitzsimmons, Phoebe Lam, Laramie T. Jensen, Yang Xiang, Amy Gartman, Georgy Cherkashov, Deborah Hutchinson, Claire P. Till
What do we really know about the role of microorganisms in iron sulfide mineral formation? What do we really know about the role of microorganisms in iron sulfide mineral formation?
Iron sulfide mineralization in low-temperature systems is a result of biotic and abiotic processes, though the delineation between these two modes of formation is not always straightforward. Here we review the role of microorganisms in the precipitation of extracellular iron sulfide minerals. We summarize the evidence that links sulfur-metabolizing microorganisms and sulfide minerals in...
Authors
Aude A. Picard, Amy Gartman, Peter R. Girguis
Filter Total Items: 14
Science and Products
Filter Total Items: 18
No Result Found
Filter Total Items: 27
Boiling-induced formation of colloidal gold in black smoker hydrothermal fluids Boiling-induced formation of colloidal gold in black smoker hydrothermal fluids
Gold colloids occur in black smoker fluids from the Niua South hydrothermal vent field, Lau Basin (South Pacific Ocean), confirming the long-standing hypothesis that gold may undergo colloidal transport in hydrothermal fluids. Six black smoker vents, varying in temperature from 250 °C to 325 °C, were sampled; the 325 °C vent was boiling at the time of sampling and the 250 °C fluids were...
Authors
Amy Gartman, Mark Hannington, John W. Jamieson, Ben Peterkin, Dieter Garbe-Schonberg, Alyssa J Findlay, Sebastian Fuchs, Tom Kwasnitschka
Arctic deep-water ferromanganese-oxide deposits reflect the unique characteristics of the Arctic Ocean Arctic deep-water ferromanganese-oxide deposits reflect the unique characteristics of the Arctic Ocean
Little is known about marine mineral deposits in the Arctic Ocean, an ocean dominated by continental shelf and basins semi-closed to deep-water circulation. Here, we present data for ferromanganese crusts and nodules collected from the Amerasia Arctic Ocean in 2008, 2009, and 2012 (HLY0805, HLY0905, HLY1202). We determined mineral and chemical compositions of the crusts and nodules and...
Authors
James R. Hein, Natalia Konstantinova, Mariah Mikesell, Kira Mizell, Jessica N. Fitzsimmons, Phoebe Lam, Laramie T. Jensen, Yang Xiang, Amy Gartman, Georgy Cherkashov, Deborah Hutchinson, Claire P. Till
What do we really know about the role of microorganisms in iron sulfide mineral formation? What do we really know about the role of microorganisms in iron sulfide mineral formation?
Iron sulfide mineralization in low-temperature systems is a result of biotic and abiotic processes, though the delineation between these two modes of formation is not always straightforward. Here we review the role of microorganisms in the precipitation of extracellular iron sulfide minerals. We summarize the evidence that links sulfur-metabolizing microorganisms and sulfide minerals in...
Authors
Aude A. Picard, Amy Gartman, Peter R. Girguis
Filter Total Items: 14