Current channelling and three-dimensional effects detected from magnetotelluric data from a sedimentary basin in Sierras Pampeanas, Argentina
Aquifer-bearing intermontane sedimentary basins of the Sierras Pampeanas in the northwest of Argentina are in general very deep and narrow and contain economically important deposits of Tertiary sediments. This paper presents the results of a study to characterize the sedimentary basin bounded to th...
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1998
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0956540X_v135_n2_p339_Pomposiello http://hdl.handle.net/20.500.12110/paper_0956540X_v135_n2_p339_Pomposiello |
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paper:paper_0956540X_v135_n2_p339_Pomposiello2023-06-08T15:56:09Z Current channelling and three-dimensional effects detected from magnetotelluric data from a sedimentary basin in Sierras Pampeanas, Argentina Argentina Magnetotelluric Magnetotelluric method Sedimentary basin Sierras Pampeanas magnetotelluric method sedimentary basin Argentina Aquifer-bearing intermontane sedimentary basins of the Sierras Pampeanas in the northwest of Argentina are in general very deep and narrow and contain economically important deposits of Tertiary sediments. This paper presents the results of a study to characterize the sedimentary basin bounded to the west by Sierra de Famatina and to the east by Sierra de Velasco, where an electromagnetic sensing technique, the magnetotelluric (MT) method, was applied. 12 MT sites were deployed along a 30 km E-W transect. Some of the data collected were used to derive a 2-D resistivity model of the basin. The model shows a subsurface trough with a thick (approximately 8 km) sedimentary sequence above it. Anomalous behaviour of the E-W electric-field component (E(y)) was detected in the period range 1-100 s, where the amplitude of this component was below the instrumental noise level. The cause of this anomaly is not known, but it might be due to the presence of an embedded conducting body between 8 and 10 km, which would give rise to N-S current channelling. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0956540X_v135_n2_p339_Pomposiello http://hdl.handle.net/20.500.12110/paper_0956540X_v135_n2_p339_Pomposiello |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Magnetotelluric Magnetotelluric method Sedimentary basin Sierras Pampeanas magnetotelluric method sedimentary basin Argentina |
| spellingShingle |
Argentina Magnetotelluric Magnetotelluric method Sedimentary basin Sierras Pampeanas magnetotelluric method sedimentary basin Argentina Current channelling and three-dimensional effects detected from magnetotelluric data from a sedimentary basin in Sierras Pampeanas, Argentina |
| topic_facet |
Argentina Magnetotelluric Magnetotelluric method Sedimentary basin Sierras Pampeanas magnetotelluric method sedimentary basin Argentina |
| description |
Aquifer-bearing intermontane sedimentary basins of the Sierras Pampeanas in the northwest of Argentina are in general very deep and narrow and contain economically important deposits of Tertiary sediments. This paper presents the results of a study to characterize the sedimentary basin bounded to the west by Sierra de Famatina and to the east by Sierra de Velasco, where an electromagnetic sensing technique, the magnetotelluric (MT) method, was applied. 12 MT sites were deployed along a 30 km E-W transect. Some of the data collected were used to derive a 2-D resistivity model of the basin. The model shows a subsurface trough with a thick (approximately 8 km) sedimentary sequence above it. Anomalous behaviour of the E-W electric-field component (E(y)) was detected in the period range 1-100 s, where the amplitude of this component was below the instrumental noise level. The cause of this anomaly is not known, but it might be due to the presence of an embedded conducting body between 8 and 10 km, which would give rise to N-S current channelling. |
| title |
Current channelling and three-dimensional effects detected from magnetotelluric data from a sedimentary basin in Sierras Pampeanas, Argentina |
| title_short |
Current channelling and three-dimensional effects detected from magnetotelluric data from a sedimentary basin in Sierras Pampeanas, Argentina |
| title_full |
Current channelling and three-dimensional effects detected from magnetotelluric data from a sedimentary basin in Sierras Pampeanas, Argentina |
| title_fullStr |
Current channelling and three-dimensional effects detected from magnetotelluric data from a sedimentary basin in Sierras Pampeanas, Argentina |
| title_full_unstemmed |
Current channelling and three-dimensional effects detected from magnetotelluric data from a sedimentary basin in Sierras Pampeanas, Argentina |
| title_sort |
current channelling and three-dimensional effects detected from magnetotelluric data from a sedimentary basin in sierras pampeanas, argentina |
| publishDate |
1998 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0956540X_v135_n2_p339_Pomposiello http://hdl.handle.net/20.500.12110/paper_0956540X_v135_n2_p339_Pomposiello |
| _version_ |
1768546548028801024 |