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Caracterização de zonas de cisalhamento dúctil com diferentes condições de P-T a partir da análise geométrica de shearband boudins

Characterization of ductile shear zones with different P-T conditions based on the geometric analyzes of shearband boudins
Authors: Sousa, João P.; Rodrigues, Benedito C.; Pamplona, J.;

Caracterização de zonas de cisalhamento dúctil com diferentes condições de P-T a partir da análise geométrica de shearband boudins

Abstract

No presente trabalho analisou-se a relação entre a morfologia de corpos boudinados e as condições tectono-metamórficas em que estes se formaram e evoluíram. Com base neste pressuposto formula-se a hipótese de ser possível associar boudins, com características geométricas bem definidas, a ambientes metamórficos específicos. Foram estudados 345 boudins, distribuidos por quatro regiões com distintos graus de metamorfismo: Serra da Salgosa, Praia da Granja, Aracena e Acebuches. Relativamente a cada boudin foi analisada a relação entre os rácios de parâmetros geométricos e o ângulo θ (ângulo entre a superficie interna do boudin – Sib – e a superfície externa do boudin – Sb). Os dados obtidos permitiram concluir que a morfologia do boudin parece depender de fatores, tais como, a espessura e natureza do corpo boudinado, o contraste de viscosidade e a taxa de deformaçao, não sendo clara uma relação entre a morfologia do boudin e o ambiente metamórfico em que este se formou.

Country
Portugal
Related Organizations
Keywords

Geometric parameters, Metamorphic environment, Parâmetros geométricos, Shearband boudin, Ambiente metamórfico

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green