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UNIVERSIDADE FEDERAL DE PERNAMBUCOCENTRO DE TECNOLOGIA EM GEOCIÊNCIAS
DEPARTAMENTO DE GEOLOGIA
DISCIPLINA: GEOLOGIA ESTRUTURAL
Tiago Miranda [email protected]
www.tiagomiranda.org
Tectônica do Sal
Reologia Geometria Diapirismo Exercício
Halocinese
Hudec and Jackson (2006)
Halocinese
Halos = halita; kinesis = movement [halokinesis]
@Fossen, 2016
Caverna Naica [México]
• Mineração Taquari-Vassouras [Sergipe]
• Silvinita (KCl)
Vale
Reologia do sal
Viscosidade
Propriedades físicas
Reologia do sal
Propriedades mecânicas
Material E (Gpa) v (Razão de Poisson)
Ferro 196 0,29
Borracha 0,01-0,1 0,5
Quartzo 72 0,16
Sal 40 ~0,38
Diamante 1.050 -1.200 0,2
Calcário 80 0,15-,03
Arenito 10-20 0,21-0,38
Folhelho 5-70 0,03-0,4
Fluxo
Deformação:??
Exemplo ideal = amortecedor
Anticlinais e diápiros
Decollements
@Fossen, 2016
Couette flow
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Poiseuille flow
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Fluxo
@Fossen, 2016
Loading (cont. margin setting)
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Geometria
@Fossen, 2016
Diapirism experiment (Nettleton
1934)
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Diápiro [Geometria]
Diapirismo
@Fossen, 2016
Diápiro [Geometria]
Planta Dasht-e Kavir, Iran (Fossen, 2016)
Diápiro [Geometria]
Seção
Hudec and Jackson (2006)
Tipos de Diapirismo
@Fossen, 2016
Diápiro [Estruturas]
@Fossen, 2016
Diapirismo
✓Falhas iniciais✓Salt sheet✓Mini-bacias✓Falhas tardias✓Colapso
@Fossen, 2016
Regime Extensional
Reactive diapirism
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Active diapirism
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Passive diapirism
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Passive diapirism, high
sedimentation rate
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Passive diapirism, low sedimentation
rate
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Diapirism: Rise
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Diapirism: Rise and fall
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Diapirismo
✓Diápiro em forma de gota✓Soldagem (weld)✓Derrames de sal (salt sheets)
Regime Contracional
@Fossen, 2016
Contraction of salt diapir
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Diapir squeezing
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Diapirismo Teardrop
Golfo do México, Canyon do Mississippi (Fossen, 2016)
Diapirismo Salt sheets
Hudec and Jacskon (2006)
@Fossen, 2016
Diapirismo Salt sheets
@Fossen (2016)
Colapso de sal
Karstificação
@Fossen, 2016
Allochthonous salt
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
Salt décollements
@Fossen, 2016
Margem passiva do W africano, Senegal
Salt décollements
@Fossen, 2016
Bacia de Santos
Hudec and Jackson (2006)
Hudec and Jackson (2006)
Exercício
1. Desenhe um bloco diagrama com os diferentes tipos de estruturas geradas pela tectônica do sal.
2. Por que o Diapirismo não inicia apenas como um resultado da inversão de densidade?3. Faça um diagrama esquemático com os principais tipos de Diapirismo de acordo com
os ambientes tectônicos.4. Qual a diferença entre Diapirismo ativo e passivo e como podemos identifica-los?5. Ler e comentar o artigo Hudec and Jackson (2007) – Terra infirma: understanding salt
tectonics.
E-module: Salt tectonics
