Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state
© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Farfan, G. A., Cordes, E. E., Waller, R. G., DeCarlo, T. M., & Hansel, C. M. (2018). Mineralogy of deep-sea coral aragonites as a function of ar...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/23680 2023-05-15T17:08:41+02:00 Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state Farfan, Gabriela A. Cordes, Erik E. Waller, Rhian G. DeCarlo, Thomas M. Hansel, Colleen M. 2018-12-10 https://hdl.handle.net/1912/23680 unknown Frontiers Media https://doi.org/10.3389/fmars.2018.00473 Farfan, G. A., Cordes, E. E., Waller, R. G., DeCarlo, T. M., & Hansel, C. M. (2018). Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state. Frontiers in Marine Science, 5, 473 https://hdl.handle.net/1912/23680 doi:10.3389/fmars.2018.00473 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Farfan, G. A., Cordes, E. E., Waller, R. G., DeCarlo, T. M., & Hansel, C. M. (2018). Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state. Frontiers in Marine Science, 5, 473 doi:10.3389/fmars.2018.00473 Deep-sea corals Lophelia pertusa Crystallography Mineralogy X-ray diffraction Ocean acidification Aragonite saturation state Aragonite Article 2018 ftwhoas https://doi.org/10.3389/fmars.2018.00473 2022-10-29T22:57:15Z © The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Farfan, G. A., Cordes, E. E., Waller, R. G., DeCarlo, T. M., & Hansel, C. M. (2018). Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state. Frontiers in Marine Science, 5, (2018): 473. doi:10.3389/fmars.2018.00473. In an ocean with rapidly changing chemistry, studies have assessed coral skeletal health under projected ocean acidification (OA) scenarios by characterizing morphological distortions in skeletal architecture and measuring bulk properties, such as net calcification and dissolution. Few studies offer more detailed information on skeletal mineralogy. Since aragonite crystallography will at least partially govern the material properties of coral skeletons, such as solubility and strength, it is important to understand how it is influenced by environmental stressors. Here, we take a mineralogical approach using micro X-ray diffraction (XRD) and whole pattern Rietveld refinement analysis to track crystallographic shifts in deep-sea coral Lophelia pertusa samples collected along a natural seawater aragonite saturation state gradient (Ωsw = 1.15–1.44) in the Gulf of Mexico. Our results reveal statistically significant linear relationships between rising Ωsw and increasing unit cell volume driven by an anisotropic lengthening along the b-axis. These structural changes are similarly observed in synthetic aragonites precipitated under various saturation states, indicating that these changes are inherent to the crystallography of aragonite. Increased crystallographic disorder via widening of the full width at half maximum of the main (111) XRD peaks trend with increased Ba substitutions for Ca, however, trace substitutions by Ba, Sr, and Mg do not trend with crystal lattice parameters in our samples. Instead, we observe a significant trend of increasing calcite content as a function of both decreasing unit cell parameters as ... Article in Journal/Newspaper Lophelia pertusa Ocean acidification Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Frontiers in Marine Science 5 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
unknown |
topic |
Deep-sea corals Lophelia pertusa Crystallography Mineralogy X-ray diffraction Ocean acidification Aragonite saturation state Aragonite |
spellingShingle |
Deep-sea corals Lophelia pertusa Crystallography Mineralogy X-ray diffraction Ocean acidification Aragonite saturation state Aragonite Farfan, Gabriela A. Cordes, Erik E. Waller, Rhian G. DeCarlo, Thomas M. Hansel, Colleen M. Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state |
topic_facet |
Deep-sea corals Lophelia pertusa Crystallography Mineralogy X-ray diffraction Ocean acidification Aragonite saturation state Aragonite |
description |
© The Author(s), 2018. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Farfan, G. A., Cordes, E. E., Waller, R. G., DeCarlo, T. M., & Hansel, C. M. (2018). Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state. Frontiers in Marine Science, 5, (2018): 473. doi:10.3389/fmars.2018.00473. In an ocean with rapidly changing chemistry, studies have assessed coral skeletal health under projected ocean acidification (OA) scenarios by characterizing morphological distortions in skeletal architecture and measuring bulk properties, such as net calcification and dissolution. Few studies offer more detailed information on skeletal mineralogy. Since aragonite crystallography will at least partially govern the material properties of coral skeletons, such as solubility and strength, it is important to understand how it is influenced by environmental stressors. Here, we take a mineralogical approach using micro X-ray diffraction (XRD) and whole pattern Rietveld refinement analysis to track crystallographic shifts in deep-sea coral Lophelia pertusa samples collected along a natural seawater aragonite saturation state gradient (Ωsw = 1.15–1.44) in the Gulf of Mexico. Our results reveal statistically significant linear relationships between rising Ωsw and increasing unit cell volume driven by an anisotropic lengthening along the b-axis. These structural changes are similarly observed in synthetic aragonites precipitated under various saturation states, indicating that these changes are inherent to the crystallography of aragonite. Increased crystallographic disorder via widening of the full width at half maximum of the main (111) XRD peaks trend with increased Ba substitutions for Ca, however, trace substitutions by Ba, Sr, and Mg do not trend with crystal lattice parameters in our samples. Instead, we observe a significant trend of increasing calcite content as a function of both decreasing unit cell parameters as ... |
format |
Article in Journal/Newspaper |
author |
Farfan, Gabriela A. Cordes, Erik E. Waller, Rhian G. DeCarlo, Thomas M. Hansel, Colleen M. |
author_facet |
Farfan, Gabriela A. Cordes, Erik E. Waller, Rhian G. DeCarlo, Thomas M. Hansel, Colleen M. |
author_sort |
Farfan, Gabriela A. |
title |
Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state |
title_short |
Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state |
title_full |
Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state |
title_fullStr |
Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state |
title_full_unstemmed |
Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state |
title_sort |
mineralogy of deep-sea coral aragonites as a function of aragonite saturation state |
publisher |
Frontiers Media |
publishDate |
2018 |
url |
https://hdl.handle.net/1912/23680 |
genre |
Lophelia pertusa Ocean acidification |
genre_facet |
Lophelia pertusa Ocean acidification |
op_source |
Farfan, G. A., Cordes, E. E., Waller, R. G., DeCarlo, T. M., & Hansel, C. M. (2018). Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state. Frontiers in Marine Science, 5, 473 doi:10.3389/fmars.2018.00473 |
op_relation |
https://doi.org/10.3389/fmars.2018.00473 Farfan, G. A., Cordes, E. E., Waller, R. G., DeCarlo, T. M., & Hansel, C. M. (2018). Mineralogy of deep-sea coral aragonites as a function of aragonite saturation state. Frontiers in Marine Science, 5, 473 https://hdl.handle.net/1912/23680 doi:10.3389/fmars.2018.00473 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2018.00473 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
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1766064500550664192 |