Subducted iron and glassy spherules in the upper mantle?
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| Natura: | Artículo científico |
| Lingua: | en |
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Sociedad Geológica Mexicana, A.C.
2022
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| author | José M. González-Jiménez |
| author_facet | José M. González-Jiménez |
| contents | Subducted iron and glassy spherules in the upper mantle? José M. González-Jiménez Ivanina Sergeeva Thomas N. Kerestedjian Fernando Gervilla Ciencias de la Tierra iron glass Spherules chromitite subduction Spherules are documented in ophiolitic mantle rocks such as peridotites and associated chromitites. They consist of: (1) native iron having variable amounts of Ni with/without inclusions of silicate glass or oxides (wüstite), (2) dendritic intergrowth of oxides (magnetite, wüstite and hematite) with/without silicate glass and, (3) silicate glass. Consensually, they are interpreted as indigenous to chromitites and related with high-temperature processes operating in the Earth’s upper mantle. However, their similarity with terrestrial and extraterrestrial spherules found in other settings of the geological record is remarkable. We raise the question on such indigenous origin, relating them to volcanic and cosmic material recycled back to the mantle wedge where chromitites form during subduction. 2022 artículo científico 1405-3322 https://www.redalyc.org/articulo.oa?id=94375433014 https://www.redalyc.org/journal/943/94375433014/ https://www.redalyc.org/journal/943/94375433014/html/ https://www.redalyc.org/journal/943/94375433014/94375433014.epub https://www.redalyc.org/journal/943/94375433014/movil https://doi.org/10.18268/BSGM2022v74n3a200722 en http://www.redalyc.org/revista.oa?id=943 Boletín de la Sociedad Geológica Mexicana application/pdf Sociedad Geológica Mexicana, A.C. Boletín de la Sociedad Geológica Mexicana (México) Num.3 Vol.74 |
| format | Artículo científico |
| id | redalyc_94375433014 |
| institution | Redalyc |
| language | en |
| publishDate | 2022 |
| publisher | Sociedad Geológica Mexicana, A.C. |
| spellingShingle | Subducted iron and glassy spherules in the upper mantle? José M. González-Jiménez Ciencias de la Tierra iron glass Spherules chromitite subduction Subducted iron and glassy spherules in the upper mantle? José M. González-Jiménez Ivanina Sergeeva Thomas N. Kerestedjian Fernando Gervilla Ciencias de la Tierra iron glass Spherules chromitite subduction Spherules are documented in ophiolitic mantle rocks such as peridotites and associated chromitites. They consist of: (1) native iron having variable amounts of Ni with/without inclusions of silicate glass or oxides (wüstite), (2) dendritic intergrowth of oxides (magnetite, wüstite and hematite) with/without silicate glass and, (3) silicate glass. Consensually, they are interpreted as indigenous to chromitites and related with high-temperature processes operating in the Earth’s upper mantle. However, their similarity with terrestrial and extraterrestrial spherules found in other settings of the geological record is remarkable. We raise the question on such indigenous origin, relating them to volcanic and cosmic material recycled back to the mantle wedge where chromitites form during subduction. 2022 artículo científico 1405-3322 https://www.redalyc.org/articulo.oa?id=94375433014 https://www.redalyc.org/journal/943/94375433014/ https://www.redalyc.org/journal/943/94375433014/html/ https://www.redalyc.org/journal/943/94375433014/94375433014.epub https://www.redalyc.org/journal/943/94375433014/movil https://doi.org/10.18268/BSGM2022v74n3a200722 en http://www.redalyc.org/revista.oa?id=943 Boletín de la Sociedad Geológica Mexicana application/pdf Sociedad Geológica Mexicana, A.C. Boletín de la Sociedad Geológica Mexicana (México) Num.3 Vol.74 |
| title | Subducted iron and glassy spherules in the upper mantle? |
| topic | Ciencias de la Tierra iron glass Spherules chromitite subduction |
| url | https://www.redalyc.org/articulo.oa?id=94375433014 https://www.redalyc.org/journal/943/94375433014/ https://www.redalyc.org/journal/943/94375433014/html/ https://www.redalyc.org/journal/943/94375433014/94375433014.epub https://www.redalyc.org/journal/943/94375433014/movil https://doi.org/10.18268/BSGM2022v74n3a200722 |