Cargando…
A role for subducted albite in the water cycle and alkalinity of subduction fluids
Albite is one of the major constituents in the crust. We report here that albite, when subjected to hydrous cold subduction conditions, undergoes hitherto unknown breakdown into hydrated smectite, moganite, and corundum, above 2.9 GPa and 290 °C or about 90 km depth conditions, followed by subsequen...
Autores principales: | , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7895919/ https://www.ncbi.nlm.nih.gov/pubmed/33608530 http://dx.doi.org/10.1038/s41467-021-21419-6 |
_version_ | 1783653453477707776 |
---|---|
author | Hwang, Gil Chan Hwang, Huijeong Bang, Yoonah Choi, Jinhyuk Park, Yong Jeon, Tae-Yeol Chae, Boknam Jung, Haemyeong Lee, Yongjae |
author_facet | Hwang, Gil Chan Hwang, Huijeong Bang, Yoonah Choi, Jinhyuk Park, Yong Jeon, Tae-Yeol Chae, Boknam Jung, Haemyeong Lee, Yongjae |
author_sort | Hwang, Gil Chan |
collection | PubMed |
description | Albite is one of the major constituents in the crust. We report here that albite, when subjected to hydrous cold subduction conditions, undergoes hitherto unknown breakdown into hydrated smectite, moganite, and corundum, above 2.9 GPa and 290 °C or about 90 km depth conditions, followed by subsequent breakdown of smectite into jadeite above 4.3 GPa and 435 °C or near 135 km depth. Upon the hydration into smectite, the fluid volume of the system decreases by ~14 %, whereas it increases by ~8 % upon its dehydration into jadeite. Both the hydration and dehydration depths are correlated to increases in seismicity by 93 % and 104 %, respectively, along the South Mariana trench over the past 5 years. Moreover, the formation of smectite is accompanied by the release of OH(−) species, which would explain the formation of moganite and expected alkalinity of the subducting fluid. Thus, we shed new insights into the mechanism of water transport and related geochemical and geophysical activities in the contemporary global subduction system. |
format | Online Article Text |
id | pubmed-7895919 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-78959192021-03-03 A role for subducted albite in the water cycle and alkalinity of subduction fluids Hwang, Gil Chan Hwang, Huijeong Bang, Yoonah Choi, Jinhyuk Park, Yong Jeon, Tae-Yeol Chae, Boknam Jung, Haemyeong Lee, Yongjae Nat Commun Article Albite is one of the major constituents in the crust. We report here that albite, when subjected to hydrous cold subduction conditions, undergoes hitherto unknown breakdown into hydrated smectite, moganite, and corundum, above 2.9 GPa and 290 °C or about 90 km depth conditions, followed by subsequent breakdown of smectite into jadeite above 4.3 GPa and 435 °C or near 135 km depth. Upon the hydration into smectite, the fluid volume of the system decreases by ~14 %, whereas it increases by ~8 % upon its dehydration into jadeite. Both the hydration and dehydration depths are correlated to increases in seismicity by 93 % and 104 %, respectively, along the South Mariana trench over the past 5 years. Moreover, the formation of smectite is accompanied by the release of OH(−) species, which would explain the formation of moganite and expected alkalinity of the subducting fluid. Thus, we shed new insights into the mechanism of water transport and related geochemical and geophysical activities in the contemporary global subduction system. Nature Publishing Group UK 2021-02-19 /pmc/articles/PMC7895919/ /pubmed/33608530 http://dx.doi.org/10.1038/s41467-021-21419-6 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Hwang, Gil Chan Hwang, Huijeong Bang, Yoonah Choi, Jinhyuk Park, Yong Jeon, Tae-Yeol Chae, Boknam Jung, Haemyeong Lee, Yongjae A role for subducted albite in the water cycle and alkalinity of subduction fluids |
title | A role for subducted albite in the water cycle and alkalinity of subduction fluids |
title_full | A role for subducted albite in the water cycle and alkalinity of subduction fluids |
title_fullStr | A role for subducted albite in the water cycle and alkalinity of subduction fluids |
title_full_unstemmed | A role for subducted albite in the water cycle and alkalinity of subduction fluids |
title_short | A role for subducted albite in the water cycle and alkalinity of subduction fluids |
title_sort | role for subducted albite in the water cycle and alkalinity of subduction fluids |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7895919/ https://www.ncbi.nlm.nih.gov/pubmed/33608530 http://dx.doi.org/10.1038/s41467-021-21419-6 |
work_keys_str_mv | AT hwanggilchan aroleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT hwanghuijeong aroleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT bangyoonah aroleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT choijinhyuk aroleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT parkyong aroleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT jeontaeyeol aroleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT chaeboknam aroleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT junghaemyeong aroleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT leeyongjae aroleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT hwanggilchan roleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT hwanghuijeong roleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT bangyoonah roleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT choijinhyuk roleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT parkyong roleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT jeontaeyeol roleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT chaeboknam roleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT junghaemyeong roleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids AT leeyongjae roleforsubductedalbiteinthewatercycleandalkalinityofsubductionfluids |