Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico
We report a magnetic study of two preceramic hearths located at the southern region of Mexico City. Thermal demagnetization was applied between 200 to 540 °C to define the remanent magnetization components. The maximum unblocking temperature of the secondary magnetic component reached due to the las...
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| Format: | Article |
| Language: | English |
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Universidad Nacional Autónoma de México
2019-11-01
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| Series: | Revista Mexicana de Ciencias Geológicas |
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| Online Access: | https://rmcg.unam.mx/index.php/rmcg/article/view/1528 |
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| author | Arnaldo Hernández-Cardona Luis Manuel Alva-Valdivia Guillermo Acosta-Ochoa Amar Agarwal Tamara Cruz-y-Cruz Emily McClung de Tapia |
| author_facet | Arnaldo Hernández-Cardona Luis Manuel Alva-Valdivia Guillermo Acosta-Ochoa Amar Agarwal Tamara Cruz-y-Cruz Emily McClung de Tapia |
| author_sort | Arnaldo Hernández-Cardona |
| collection | DOAJ |
| description | We report a magnetic study of two preceramic hearths located at the southern region of Mexico City. Thermal demagnetization was applied between 200 to 540 °C to define the remanent magnetization components. The maximum unblocking temperature of the secondary magnetic component reached due to the last heating was identified in most samples. They were used to develop thermomagnetic anomaly source maps. The direction of this component was used to place the blocks to their last cooling spot and configurate a real and primal magnetic anomaly map produced by the thermoremanent magnetization acquired. A protocol to relocate blocks frame is proposed using geomagnetic secular variation curves. The thermomagnetic mapping revealed the position and temperature (220 to 460 °C) of the last heat sources. The distribution of these sources allowed to model an extensional zone of benefit and probable uses of the hearths.
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| format | Article |
| id | doaj-art-d77e3d41e14e4340bd3ace8bc7db6080 |
| institution | Kabale University |
| issn | 1026-8774 2007-2902 |
| language | English |
| publishDate | 2019-11-01 |
| publisher | Universidad Nacional Autónoma de México |
| record_format | Article |
| series | Revista Mexicana de Ciencias Geológicas |
| spelling | doaj-art-d77e3d41e14e4340bd3ace8bc7db60802025-08-20T03:44:54ZengUniversidad Nacional Autónoma de MéxicoRevista Mexicana de Ciencias Geológicas1026-87742007-29022019-11-0136310.22201/cgeo.20072902e.2019.3.1528Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, MexicoArnaldo Hernández-Cardona0Luis Manuel Alva-Valdivia1Guillermo Acosta-Ochoa2Amar Agarwal3Tamara Cruz-y-Cruz4Emily McClung de Tapia5Posgrado en Ciencias de la Tierra, Instituto de Geofísica, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica, C.P. 04510 Mexico City, Mexico.Laboratorio de Paleomagnetismo, Instituto de Geofísica, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica, C.P. 04510 Mexico City, Mexico.Instituto de Investigaciones Antropológicas. Universidad Nacional Autónoma de México, Ciudad Universitaria 04510, Mexico City, Mexico.Institute of Earth and Environmental Sciences, Geology, University of Freiburg, Freiburg, Germany.Instituto de Investigaciones Antropológicas, Universidad Nacional Autónoma de México, Ciudad Universitaria 04510, Mexico City, Mexico.Instituto de Investigaciones Antropológicas, Universidad Nacional Autónoma de México, Ciudad Universitaria 04510, Mexico City, Mexico.We report a magnetic study of two preceramic hearths located at the southern region of Mexico City. Thermal demagnetization was applied between 200 to 540 °C to define the remanent magnetization components. The maximum unblocking temperature of the secondary magnetic component reached due to the last heating was identified in most samples. They were used to develop thermomagnetic anomaly source maps. The direction of this component was used to place the blocks to their last cooling spot and configurate a real and primal magnetic anomaly map produced by the thermoremanent magnetization acquired. A protocol to relocate blocks frame is proposed using geomagnetic secular variation curves. The thermomagnetic mapping revealed the position and temperature (220 to 460 °C) of the last heat sources. The distribution of these sources allowed to model an extensional zone of benefit and probable uses of the hearths. https://rmcg.unam.mx/index.php/rmcg/article/view/1528magnetic anomaly mappinghearthsPlaya Phasesouthern Mexico CityMexico |
| spellingShingle | Arnaldo Hernández-Cardona Luis Manuel Alva-Valdivia Guillermo Acosta-Ochoa Amar Agarwal Tamara Cruz-y-Cruz Emily McClung de Tapia Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico Revista Mexicana de Ciencias Geológicas magnetic anomaly mapping hearths Playa Phase southern Mexico City Mexico |
| title | Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico |
| title_full | Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico |
| title_fullStr | Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico |
| title_full_unstemmed | Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico |
| title_short | Unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of Mexico City, Mexico |
| title_sort | unblocking temperature of secondary magnetic component to outline anomaly thermomagnetic maps of archaeological fireplaces from the southern region of mexico city mexico |
| topic | magnetic anomaly mapping hearths Playa Phase southern Mexico City Mexico |
| url | https://rmcg.unam.mx/index.php/rmcg/article/view/1528 |
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