Structure of an intraplate fold-and-thrust belt: The Iberian Chain. A synthesis

Geologica Acta

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Title Structure of an intraplate fold-and-thrust belt: The Iberian Chain. A synthesis
 
Creator GUIMERÀ, J.
 
Subject Thrust belt; Intraplate; Crustal thickness; Iberia.
 
Description The Iberian Chain is a complex intraplate fold-and-thrust belt resulting from the convergence between the Eurasian, Iberian and African plates during the late Eocene to the Miocene. The main trend of its contractionalstructures is NW-SE, but E-W, NE-SW and N-S-trending structures are also present. The boundaries of the chain with its surrounding foreland basins are always thrusts. The North-Iberian Thrust separates thechain from the Ebro Basin to the North, while the Serranía de Cuenca Thrust makes the SE boundary of the chain, separating it from the Tajo Basin and La Mancha foreland areas. Between these thrusts, thecontractional structure is basement-involved, while South of the Serranía de Cuenca Thrust only Mesozoic and Cenozoic rocks are involved in the thrust-system, detached in the evaporitic Triassic materials. Twoparts can be differentiated considering the major structure of the chain. The western and central areas hold two major anticlinoriums separated by the Almazán Synclinorium. East of the Teruel Depression, E-WstrikingN-verging thrusts in the North, and NW-SE-striking S-verging thrusts in the center and South are the dominant structures.The crust thickened during the Cenozoic contraction generating a mean crustal thickening of about 5km. The horizontal shortening obtained from cross-sections is 32km, and from a density-gravity section of 57.5km.These two values may be considered end values.The relief of the Iberian Chain has a strong areal coincidence with the contractional structures and the thickened crust, indicating that they are genetically related.
 
Publisher Geologica Acta
Geologica Acta
Geologica Acta
 
Contributor Universitat de Barcelona
 
Date 2018-12-20
 
Type info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

 
Format application/pdf
 
Identifier http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2018.16.4.6
10.1344/GeologicaActa2018.16.4.6
 
Source Geologica Acta; Vol 16, No 4: Contributions to the geological evolution of the Iberian Peninsula: a tribute to Pere Santanach; 427-438
Geologica Acta; Vol 16, No 4: Contributions to the geological evolution of the Iberian Peninsula: a tribute to Pere Santanach; 427-438
Geologica Acta; Vol 16, No 4: Contributions to the geological evolution of the Iberian Peninsula: a tribute to Pere Santanach; 427-438
1696-5728
1695-6133
 
Language eng
 
Relation http://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2018.16.4.6/27990
http://revistes.ub.edu/index.php/GEOACTA/article/downloadSuppFile/GeologicaActa2018.16.4.6/3191
http://revistes.ub.edu/index.php/GEOACTA/article/downloadSuppFile/GeologicaActa2018.16.4.6/3192
http://revistes.ub.edu/index.php/GEOACTA/article/downloadSuppFile/GeologicaActa2018.16.4.6/3193
 
Coverage Iberian Peninsula
Cenozoic
Structural Geology
 
Rights Copyright (c) 2018 Geologica Acta
 

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