Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversion
We interpret a new compilation of total-field magnetic anomaly data from the eastern part of the Maya Terrane, comprising aeromagnetic data for the Yucatan Peninsula and marine magnetic data for its northern and eastern continental margins. Qualitatively, on the basis of amplitude, shape; and horizo...
| Autores: | , |
|---|---|
| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 1994 |
| País: | México |
| Recursos: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Geofísica Internacional |
| Idioma: | español |
| OAI Identifier: | oai:revistagi.geofisica.unam.mx:article/509 |
| Acesso em linha: | http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/509 |
| Access Level: | acceso abierto |
| Palavra-chave: | Anomalías magnéticas inversión del espectro de potencia estructura de la corteza Terreno Maya Bloque Yucatán México Magnetic anomalies inversion of the power spectrum crustal structure Maya Terrane Yucatan Block Mexico |
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Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversionCrustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversionGarcía-Abdeslem, J.Ness, G. E.Anomalías magnéticasinversión del espectro de potenciaestructura de la cortezaTerreno MayaBloque YucatánMéxicoMagnetic anomaliesinversion of the power spectrumcrustal structureMaya TerraneYucatan BlockMexicoWe interpret a new compilation of total-field magnetic anomaly data from the eastern part of the Maya Terrane, comprising aeromagnetic data for the Yucatan Peninsula and marine magnetic data for its northern and eastern continental margins. Qualitatively, on the basis of amplitude, shape; and horizontal extent of the magnetic anomalies and their correlation with available geologic and geophysical information we infer that the eastern part of the Maya Terrane can be divided at least in four tectonic blocks. We model the radially-averaged power-density spectrum of the magnetic anomalies from the northern continental margin of the Yucatan peninsula by the superposition of functions that statistically describe the depth to the top and the thickness and horizontal dimensions of an ensemble of uniformly magnetized prisms. The results are portrayed as contour maps which show depth to basement and thickness of the crustal magnetic layer. The magnetic basement is found at an average depth of 1.8 km below sea level and shows some agreement with the character of magnetic and gravity anomalies, as well as seismic and drillhole data. The basal depth of the crustal magnetic layer varies from 15 to 35 km below sea level, in agreement with the presence or absence of long-wavelength magnetic and gravity anomalies. This interpretation suggests that locally the Moho is the magnetic boundary.Se interpreta una compilación reciente de anomalías magnéticas de campo total de la porción oriental del Terreno Maya, que incluye datos aeromagnéticos de la Península de Yucatán y datos magnéticos marinos de su margen continental hacia el norte y oriente. Con base en la amplitud, forma y extensión horizontal de las anomalías magnéticas y su correlación con información geológica y geofísica disponible se infiere que la porción oriental del Terreno Maya esta constituida por al menos cuatro bloques tectónicos. Modelamos el espectro de potencia radial de las anomalías magnéticas de la margen continental al norte de la Península mediante la superposición de funciones que en forma estadística describen la profundidad a la cima, el espesor y las dimensiones horizontales de una colección de prismas verticales uniformemente magnetizados. Los resultados se exhiben en forma de mapas de contornos que muestran la profundidad a la cima y a la base de la corteza. El relieve del basamento promedia 1.8 km bajo el nivel del mar y esta de acuerdo tanto con el carácter de las anomalías gravimétricas y magnéticas como con la interpretación de datos sísmicos y con información de pozos. La profundidad a la base de la corteza magnetizada varia de 15 a 35 km bajo el nivel del mar según la presencia o ausencia de anomalías magnéticas y gravimétricas de gran longitud de onda. Esta interpretación sugiere que localmente el Moho es la frontera magnética.Universidad Nacional Autónoma de México. Instituto de Geofísica1994-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistagi.geofisica.unam.mx/index.php/RGI/article/view/50910.22201/igeof.00167169p.1994.33.3.1180Geofisica Internacional; Vol. 33 No. 3 (1994): July 1, 1994; 399-420Geofísica Internacional; Vol. 33 Núm. 3 (1994): Julio 1, 1994; 399-4202954-436X0016-716910.22201/igeof.00167169p.1994.33.3reponame:Geofísica Internacionalinstname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICOinstacron:UNAMspahttp://revistagi.geofisica.unam.mx/index.php/RGI/article/view/509/526https://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccessoai:revistagi.geofisica.unam.mx:article/5092024-08-16T17:31:54Z |
| dc.title.none.fl_str_mv |
Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversion Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversion |
| title |
Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversion |
| spellingShingle |
Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversion García-Abdeslem, J. Anomalías magnéticas inversión del espectro de potencia estructura de la corteza Terreno Maya Bloque Yucatán México Magnetic anomalies inversion of the power spectrum crustal structure Maya Terrane Yucatan Block Mexico |
| title_short |
Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversion |
| title_full |
Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversion |
| title_fullStr |
Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversion |
| title_full_unstemmed |
Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversion |
| title_sort |
Crustal structure of the eastern part of the Maya Terrane from magnetic anomalies and magnetic power spectrum inversion |
| dc.creator.none.fl_str_mv |
García-Abdeslem, J. Ness, G. E. |
| author |
García-Abdeslem, J. |
| author_facet |
García-Abdeslem, J. Ness, G. E. |
| author_role |
author |
| author2 |
Ness, G. E. |
| author2_role |
author |
| dc.subject.none.fl_str_mv |
Anomalías magnéticas inversión del espectro de potencia estructura de la corteza Terreno Maya Bloque Yucatán México Magnetic anomalies inversion of the power spectrum crustal structure Maya Terrane Yucatan Block Mexico |
| topic |
Anomalías magnéticas inversión del espectro de potencia estructura de la corteza Terreno Maya Bloque Yucatán México Magnetic anomalies inversion of the power spectrum crustal structure Maya Terrane Yucatan Block Mexico |
| description |
We interpret a new compilation of total-field magnetic anomaly data from the eastern part of the Maya Terrane, comprising aeromagnetic data for the Yucatan Peninsula and marine magnetic data for its northern and eastern continental margins. Qualitatively, on the basis of amplitude, shape; and horizontal extent of the magnetic anomalies and their correlation with available geologic and geophysical information we infer that the eastern part of the Maya Terrane can be divided at least in four tectonic blocks. We model the radially-averaged power-density spectrum of the magnetic anomalies from the northern continental margin of the Yucatan peninsula by the superposition of functions that statistically describe the depth to the top and the thickness and horizontal dimensions of an ensemble of uniformly magnetized prisms. The results are portrayed as contour maps which show depth to basement and thickness of the crustal magnetic layer. The magnetic basement is found at an average depth of 1.8 km below sea level and shows some agreement with the character of magnetic and gravity anomalies, as well as seismic and drillhole data. The basal depth of the crustal magnetic layer varies from 15 to 35 km below sea level, in agreement with the presence or absence of long-wavelength magnetic and gravity anomalies. This interpretation suggests that locally the Moho is the magnetic boundary. |
| publishDate |
1994 |
| dc.date.none.fl_str_mv |
1994-07-01 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| format |
article |
| status_str |
publishedVersion |
| dc.identifier.none.fl_str_mv |
http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/509 10.22201/igeof.00167169p.1994.33.3.1180 |
| url |
http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/509 |
| identifier_str_mv |
10.22201/igeof.00167169p.1994.33.3.1180 |
| dc.language.none.fl_str_mv |
spa |
| language |
spa |
| dc.relation.none.fl_str_mv |
http://revistagi.geofisica.unam.mx/index.php/RGI/article/view/509/526 |
| dc.rights.none.fl_str_mv |
https://creativecommons.org/licenses/by-nc-sa/4.0/ info:eu-repo/semantics/openAccess |
| rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/4.0/ |
| eu_rights_str_mv |
openAccess |
| dc.format.none.fl_str_mv |
application/pdf |
| dc.publisher.none.fl_str_mv |
Universidad Nacional Autónoma de México. Instituto de Geofísica |
| publisher.none.fl_str_mv |
Universidad Nacional Autónoma de México. Instituto de Geofísica |
| dc.source.none.fl_str_mv |
Geofisica Internacional; Vol. 33 No. 3 (1994): July 1, 1994; 399-420 Geofísica Internacional; Vol. 33 Núm. 3 (1994): Julio 1, 1994; 399-420 2954-436X 0016-7169 10.22201/igeof.00167169p.1994.33.3 reponame:Geofísica Internacional instname:UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO instacron:UNAM |
| instname_str |
UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
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UNAM |
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UNAM |
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Geofísica Internacional |
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Geofísica Internacional |
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