Zobrazeno 1 - 10
of 247
pro vyhledávání: '"M Darby, Dyar"'
Autor:
Elizabeth C. Sklute, Deborah A. Leopo, Kaylee A. Neat, Kenneth J. T. Livi, M. Darby Dyar, James F. Holden
Publikováno v:
Frontiers in Microbiology, Vol 14 (2023)
Some thermophilic bacteria from deep-sea hydrothermal vents grow by dissimilatory iron reduction, but our understanding of their biogenic mineral transformations is nascent. Mineral transformations catalyzed by the thermophilic iron-reducing bacteriu
Externí odkaz:
https://doaj.org/article/31d5a77346d54f7785de22d1e58e06b1
Autor:
Thomas H. Burbine, Iman Khanani, Deepika Kumawat, Ahlay Hussain, Sydney M. Wallace, M. Darby Dyar
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 9, p 194 (2024)
The most widely used method to spectrally classify asteroids is the Bus–DeMeo taxonomy. To test how well the Bus–DeMeo taxonomy groups asteroids on the basis of their mineralogy, we have classified ∼1500 meteorite spectra using this Bus–DeMeo
Externí odkaz:
https://doaj.org/article/c4cb24bbd4df48fd9f3e209c9da61765
Autor:
Melissa D. Lane, Edward A. Cloutis, Roger N. Clark, M. Darby Dyar, Joern Helbert, Amanda R. Hendrix, Gregory Holsclaw, Alessandro Maturilli, Neil Pearson, Mikki Osterloo, Faith Vilas, Daniel Applin
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 8, p 189 (2024)
This paper presents far-ultraviolet through mid-infrared (0.12–20 μ m) reflectance spectra of 27 fine-particulate (
Externí odkaz:
https://doaj.org/article/fbba0dbe37a04e4d990fd93900ee7f44
Autor:
Elizabeth C. Sklute, Jill A. Mikucki, M. Darby Dyar, Peter A. Lee, Ken J. T. Livi, Sarina Mitchell
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Aperiodic discharge of brine at Blood Falls forms a red-tinged fan at the terminus of Taylor Glacier, Antarctica. Samples from this discharge provide an opportunity for mineralogical study at a Martian analogue study site. Environmental samples were
Externí odkaz:
https://doaj.org/article/530f8b5f996f4cf6a76f60efac13d5ef
Autor:
Reed J. Hopkins, Elizabeth C. Sklute, M. Darby Dyar, A. Deanne Rogers, Roger N. Clark, Rilla McKeegan
Publikováno v:
The Planetary Science Journal, Vol 4, Iss 9, p 173 (2023)
The Chemistry and Mineralogy X-ray diffraction (XRD) instrument aboard the Curiosity rover consistently identifies amorphous material at Gale Crater, which is compositionally variable, but often includes elevated sulfur and iron, suggesting that amor
Externí odkaz:
https://doaj.org/article/e623fa3f67da4505827980efa03ebf4c
Autor:
Rachel Y. Sheppard, Ralph E. Milliken, James M. Russell, Elizabeth C. Sklute, M. Darby Dyar, Hendrik Vogel, Martin Melles, Satria Bijaksana, Ascelina K. M. Hasberg, Marina A. Morlock
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 22, Iss 8, Pp n/a-n/a (2021)
Abstract Iron is the most abundant redox‐sensitive element on the Earth's surface, and the oxidation state, mineral host, and crystallinity of Fe‐rich phases in sedimentary systems can record details of water‐rock interactions and environmental
Externí odkaz:
https://doaj.org/article/db4347adc8f04c53b8af0e804582dce0
Publikováno v:
American Mineralogist. 107:2084-2100
Oxygen fugacity is an important but difficult parameter to constrain for primitive arc magmas. In this study, the partitioning behavior of Fe3+/Fe2+ between amphibole and glass synthesized in piston-cylinder and cold-seal apparatus experiments is dev
The Curiosity and Perseverance Mars rovers include the laser-induced breakdown spectroscopy (LIBS) instruments ChemCam and SuperCam, respectively, to assess the chemistry of Mars surface materials. Onboard calibration targets (CT) are frequently anal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36e83085c59f6dbb523bb05a7821ffb2
https://doi.org/10.22541/essoar.167751631.16086403/v1
https://doi.org/10.22541/essoar.167751631.16086403/v1
Publikováno v:
American Mineralogist. 107:654-663
Anisotropic absorption in crystals is routinely observed in many spectroscopic methods and is recognized in visible light optics as pleochroism in crystalline materials. As with other spectrosco-pies, anisotropy in Fe K-edge X-ray absorption spectros
Autor:
Marc Maderazzo, John M. Hughes, M. Darby Dyar, George R. Rossman, Brandon J. Ackley, Elizabeth C. Sklute, Marian V. Lupulescu, Jeffrey Chiarenzelli
Publikováno v:
American Mineralogist. 107:92-99
Vonsenite, Fe22+Fe3+O2BO3, has been the subject of many studies in the materials science and condensed matter physics communities due to interest in the electronic and magnetic properties and ordering behavior of the phase. One such study, undertaken