Structure of Alluvial Valleys from 3-D Gravity Inversion: The Low Andarax Valley (Almería, Spain) Test Case

Prieto Morin, Juan Francisco and Camacho, Antonio G. and Carmona, Antonio and García-Jerez, Antonio and Sánchez-Martos, Francisco and Fernández, Jose and Luzón, Francisco (2015). Structure of Alluvial Valleys from 3-D Gravity Inversion: The Low Andarax Valley (Almería, Spain) Test Case. "Pure And Applied Geophysics", v. 172 (n. 11); pp. 3107-3125. ISSN 0033-4553. https://doi.org/10.1007/s00024-014-0914-8.

Description

Title: Structure of Alluvial Valleys from 3-D Gravity Inversion: The Low Andarax Valley (Almería, Spain) Test Case
Author/s:
  • Prieto Morin, Juan Francisco
  • Camacho, Antonio G.
  • Carmona, Antonio
  • García-Jerez, Antonio
  • Sánchez-Martos, Francisco
  • Fernández, Jose
  • Luzón, Francisco
Item Type: Article
Título de Revista/Publicación: Pure And Applied Geophysics
Date: November 2015
ISSN: 0033-4553
Volume: 172
Subjects:
Faculty: E.T.S.I. en Topografía, Geodesia y Cartografía (UPM)
Department: Ingeniería Cartográfica y Topografía
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This paper presents a gravimetric study (based on 382 gravimetric stations in an area about 32 km2) of a nearly flat basin: the Low Andarax valley. This alluvial basin, close to its river mouth, is located in the extreme south of the province of Almería and coincides with one of the existing depressions in the Betic Cordillera. The paper presents new methodological work to adapt a published inversion approach (GROWTH method) to the case of an alluvial valley (sedimentary stratification, with density increase downward). The adjusted 3D density model reveals several features in the topography of the discontinuity layers between the calcareous basement (2,700 kg/m3) and two sedimentary layers (2,400 and 2,250 kg/m3). We interpret several low density alignments as corresponding to SE faults striking about N140?145°E. Some detected basement elevations (such as the one, previously known by boreholes, in Viator village) are apparently connected with the fault pattern. The outcomes of this work are: (1) new gravimetric data, (2) new methodological options, and (3) the resulting structural conclusions.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainCGL2010-16250UnspecifiedUnspecifiedDeterminación de parámetros geofísicos y geométricos de valles aluviales y su influencia en el movimiento sísmico: el caso del valle del río Andarax (Almeria)
Government of SpainAYA2010-17448GEOSIRUnspecifiedNuevas metodologías para la integración e interpretación de datos de observación de la tierra desde el espacio: aplicaciones en ciencias de la tierra e ingeniería

More information

Item ID: 35839
DC Identifier: http://oa.upm.es/35839/
OAI Identifier: oai:oa.upm.es:35839
DOI: 10.1007/s00024-014-0914-8
Official URL: http://link.springer.com/article/10.1007/s00024-014-0914-8
Deposited by: Memoria Investigacion
Deposited on: 26 Jan 2016 11:39
Last Modified: 31 May 2019 14:34
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