universidade federal de pernambuco centro de tecnologia e ... · diapir squeezing animations made...
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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
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Tectônica do Sal
Reologia Geometria Diapirismo Exercício
Halocinese
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Hudec and Jackson (2006)
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Halocinese
Halos = halita; kinesis = movement [halokinesis]
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@Fossen, 2016
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Caverna Naica [México]
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• Mineração Taquari-Vassouras [Sergipe]
• Silvinita (KCl)
Vale
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Reologia do sal
Viscosidade
Propriedades físicas
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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
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Fluxo
Deformação:??
Exemplo ideal = amortecedor
Anticlinais e diápiros
Decollements
@Fossen, 2016
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Couette flow
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
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Poiseuille flow
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
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Fluxo
@Fossen, 2016
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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
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Geometria
@Fossen, 2016
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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
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Diápiro [Geometria]
Diapirismo
@Fossen, 2016
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Diápiro [Geometria]
Planta Dasht-e Kavir, Iran (Fossen, 2016)
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Diápiro [Geometria]
Seção
Hudec and Jackson (2006)
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Tipos de Diapirismo
@Fossen, 2016
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Diápiro [Estruturas]
@Fossen, 2016
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Diapirismo
✓Falhas iniciais✓Salt sheet✓Mini-bacias✓Falhas tardias✓Colapso
@Fossen, 2016
Regime Extensional
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Reactive diapirism
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
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Active diapirism
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
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Passive diapirism
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
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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
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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
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Diapirism: Rise
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
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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
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Diapirismo
✓Diápiro em forma de gota✓Soldagem (weld)✓Derrames de sal (salt sheets)
Regime Contracional
@Fossen, 2016
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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
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Diapir squeezing
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
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Diapirismo Teardrop
Golfo do México, Canyon do Mississippi (Fossen, 2016)
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Diapirismo Salt sheets
Hudec and Jacskon (2006)
@Fossen, 2016
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Diapirismo Salt sheets
@Fossen (2016)
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Colapso de sal
Karstificação
@Fossen, 2016
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Allochthonous salt
Animations made by H. Fossen as a resource to Fossen 2016, Structural Geology, Cambridge Univ. Press. Free for non-commercial use
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Salt décollements
@Fossen, 2016
Margem passiva do W africano, Senegal
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Salt décollements
@Fossen, 2016
Bacia de Santos
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Hudec and Jackson (2006)
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Hudec and Jackson (2006)
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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.
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E-module: Salt tectonics