Secuencia de meteorización y su relación con las propiedades de carga y superficie de la fracción arcilla de algunos andosoles de Costa Rica
Mineralogical composition, TSS, CEC and charge density of the clay fraction of Costa Rican sediments and andosols were determined. The sampling was made following a toposequence from Mt Irazu (3400 m) to Meseta Central (1000 m). It is presumed that this parent material weathered according with to t...
| Autores principales: | , , |
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| Formato: | Artículo |
| Lenguaje: | Español |
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Instituto Interamericano de Cooperación para la Agricultura (IICA)
2025
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| Materias: | |
| Acceso en línea: | https://repositorio.catie.ac.cr/handle/11554/13115 |
| _version_ | 1855489702947192832 |
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| author | González M, S.P. Kozen, I. Besoain M., E. |
| author_browse | Besoain M., E. González M, S.P. Kozen, I. |
| author_facet | González M, S.P. Kozen, I. Besoain M., E. |
| author_sort | González M, S.P. |
| collection | Repositorio CATIE |
| description | Mineralogical composition, TSS, CEC and charge density of the clay fraction of Costa Rican sediments and andosols were determined. The sampling was made following a toposequence from Mt Irazu (3400 m) to Meseta Central (1000 m).
It is presumed that this parent material weathered according with to the following sequence:
Volcanic ashes → amorphous gels of silica alumina, hydrated glasses, etc → allophane (B, AB, A) → metahalloysite.
This sequence developed in an “horizontal” sense, from Irazu volcano to Meseta Central, increasing its age and the intensity of climatic conditions. The same sequence developed too in a “vertical” sense within the profiles, in these depositions, the oldest layer is the deeper one. For this research, the ashes from Irazu volcano are considered to be at time zero.
Analytical records suggest the existence of bissingerite; its origin could be parallel to that of allophane. More research should be required to evidence its real existence and its formation.
Values of TSS and CEC show a parallel variation with the evolution of clay minerals, i.e. values increase from rough ashes to allophane. A and then, decrease with the formation of metahalloysite. Charge density values, however, tend to stay constant at fixed pH-value, without influence of the mineralogical stage of the sampler.
The use of TSS and CEC as a supplement of routine mineralogical analysis is helpful, because they show a trend according with clay evolution and differences in clays of similar constitution. This allows a better interpretation of the mineralogical analysis.
CEC and charge density values were useful in order to identify the formation of highly unstable complexes with high content of free hydroxiles groups during the allophane synthesis. |
| format | Artículo |
| id | RepoCATIE13115 |
| institution | Centro Agronómico Tropical de Investigación y Enseñanza |
| language | Español |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Instituto Interamericano de Cooperación para la Agricultura (IICA) |
| publisherStr | Instituto Interamericano de Cooperación para la Agricultura (IICA) |
| record_format | dspace |
| spelling | RepoCATIE131152025-07-02T23:04:01Z Secuencia de meteorización y su relación con las propiedades de carga y superficie de la fracción arcilla de algunos andosoles de Costa Rica González M, S.P. Kozen, I. Besoain M., E. Meteorización||weathering||meteorização||altération atmosphérique Arcilla||clay||argila||argile Andosol||Andosols||Andossolo||Andosol Composición quimica||chemical composition||composição química||composition chimique Sedimento||sediment||sedimento||sédiment Ceniza||ashes||cinza||cendre Suelo volcánico||volcanic soils||solo vulcânico||sol volcanique Costa Rica||Costa Rica||Costa Rica||Costa Rica Mineral de arcilla||clay minerals||mineral argiloso||minéral argileux Sede Central Mineralogical composition, TSS, CEC and charge density of the clay fraction of Costa Rican sediments and andosols were determined. The sampling was made following a toposequence from Mt Irazu (3400 m) to Meseta Central (1000 m). It is presumed that this parent material weathered according with to the following sequence: Volcanic ashes → amorphous gels of silica alumina, hydrated glasses, etc → allophane (B, AB, A) → metahalloysite. This sequence developed in an “horizontal” sense, from Irazu volcano to Meseta Central, increasing its age and the intensity of climatic conditions. The same sequence developed too in a “vertical” sense within the profiles, in these depositions, the oldest layer is the deeper one. For this research, the ashes from Irazu volcano are considered to be at time zero. Analytical records suggest the existence of bissingerite; its origin could be parallel to that of allophane. More research should be required to evidence its real existence and its formation. Values of TSS and CEC show a parallel variation with the evolution of clay minerals, i.e. values increase from rough ashes to allophane. A and then, decrease with the formation of metahalloysite. Charge density values, however, tend to stay constant at fixed pH-value, without influence of the mineralogical stage of the sampler. The use of TSS and CEC as a supplement of routine mineralogical analysis is helpful, because they show a trend according with clay evolution and differences in clays of similar constitution. This allows a better interpretation of the mineralogical analysis. CEC and charge density values were useful in order to identify the formation of highly unstable complexes with high content of free hydroxiles groups during the allophane synthesis. 2025-07-01T18:28:53Z 2025-07-01T18:28:53Z 1972-10 Artículo https://repositorio.catie.ac.cr/handle/11554/13115 openAccess es Turrialba; Vol.22, no. 4 10 páginas application/pdf Instituto Interamericano de Cooperación para la Agricultura (IICA) |
| spellingShingle | Meteorización||weathering||meteorização||altération atmosphérique Arcilla||clay||argila||argile Andosol||Andosols||Andossolo||Andosol Composición quimica||chemical composition||composição química||composition chimique Sedimento||sediment||sedimento||sédiment Ceniza||ashes||cinza||cendre Suelo volcánico||volcanic soils||solo vulcânico||sol volcanique Costa Rica||Costa Rica||Costa Rica||Costa Rica Mineral de arcilla||clay minerals||mineral argiloso||minéral argileux Sede Central González M, S.P. Kozen, I. Besoain M., E. Secuencia de meteorización y su relación con las propiedades de carga y superficie de la fracción arcilla de algunos andosoles de Costa Rica |
| title | Secuencia de meteorización y su relación con las propiedades de carga y superficie de la fracción arcilla de algunos andosoles de Costa Rica |
| title_full | Secuencia de meteorización y su relación con las propiedades de carga y superficie de la fracción arcilla de algunos andosoles de Costa Rica |
| title_fullStr | Secuencia de meteorización y su relación con las propiedades de carga y superficie de la fracción arcilla de algunos andosoles de Costa Rica |
| title_full_unstemmed | Secuencia de meteorización y su relación con las propiedades de carga y superficie de la fracción arcilla de algunos andosoles de Costa Rica |
| title_short | Secuencia de meteorización y su relación con las propiedades de carga y superficie de la fracción arcilla de algunos andosoles de Costa Rica |
| title_sort | secuencia de meteorizacion y su relacion con las propiedades de carga y superficie de la fraccion arcilla de algunos andosoles de costa rica |
| topic | Meteorización||weathering||meteorização||altération atmosphérique Arcilla||clay||argila||argile Andosol||Andosols||Andossolo||Andosol Composición quimica||chemical composition||composição química||composition chimique Sedimento||sediment||sedimento||sédiment Ceniza||ashes||cinza||cendre Suelo volcánico||volcanic soils||solo vulcânico||sol volcanique Costa Rica||Costa Rica||Costa Rica||Costa Rica Mineral de arcilla||clay minerals||mineral argiloso||minéral argileux Sede Central |
| url | https://repositorio.catie.ac.cr/handle/11554/13115 |
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