Modes of thickening of analogue weak lithospheres

Cagnard, Florence; Brun, Jean‐Pierre; Gapais, Denis

doi:10.1016/j.tecto.2006.04.016

Cited by 58 publications

(49 citation statements)

References 76 publications

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“…, 2005). This escape tectonics might have acted as a ‘mobile boundary’ substituting the ‘free’ boundary necessary in analogue models to generate gravity‐driven lateral flow (Cagnard et al. , 2006a).…”

Section: Discussionmentioning

confidence: 99%

Deformation of a pervasively molten middle crust: insights from the neoproterozoic Ribeira‐Araçuaí orogen (SE Brazil)

et al. 2007

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Pervasive melting of the middle crust, as inferred in Tibet and the Altiplano, probably influences the deformation of the lithosphere. To constrain strain distribution in a pervasively molten crust, we analysed the deformation in an eroded analogue of these orogens. The Ribeira‐Araçuaí orogen (SE Brazil) comprises a stack of allochthons containing large volumes of anatectic and magmatic rocks. The upper allochton (∼300 km long, 50–100 km wide and >10 km thick) involves peraluminous diatexites and leucogranites resulting from partial melting of the middle crust. It overlies another allochthon containing huge early‐ to syn‐collisional plutons intruding metasediments. Both anatexites and magmatic intrusions display a pervasive strain‐induced magmatic fabric. Homogeneous strain distribution suggests inefficient localization. U–Pb ages of ∼575 Ma imply that anatexite melting was synchronous to the early‐ to syn‐collisional magmatism. Similarity in ages magmatic and solid‐state fabrics indicates that intrusions and anatexites deformed coherently with solid‐state rocks while still molten, in response to a combination of gravity‐driven and collision‐driven deformation.

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Section: Discussionmentioning

confidence: 99%

Deformation of a pervasively molten middle crust: insights from the neoproterozoic Ribeira‐Araçuaí orogen (SE Brazil)

et al. 2007

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“…Weijermars 1986;Corti et al 2005). As temperature varies, the viscosity of PDMS follows an Arrhenius law (Hailemariam and Mulugeta 1998;Cagnard et al 2006), i.e., it decreases exponentially with increasing temperature. The viscosity of PDMS can be easily measured by using a cylindrical viscometer, as described by e.g.…”

Section: "High" Viscosity Magmamentioning

confidence: 99%

Laboratory Modelling of Volcano Plumbing Systems: A Review

Galland

Holohan

Vries

et al. 2015

Physical Geology of Shallow Magmatic Systems

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We review the numerous experimental studies dedicated to unravelling the physics and dynamics of various parts of a volcanic plumbing system. Section 1 lists the model materials commonly used for model magmas or model rocks. We describe these materials' mechanical properties and discuss their suitability for modelling sub-volcanic processes. Section 2 examines the fundamental concepts of dimensional analysis and similarity in laboratory modelling. We provide a step-by-step explanation of how to apply dimensional analysis to laboratory models in order to identify fundamental physical laws that govern the modelled processes in dimensionless (i.e. scale independent) form. Section 3 summarises and discusses the past applications of laboratory models to understand numerous features of volcanic plumbing systems. These include: dykes, cone sheets, sills, laccoliths, caldera-related structures, ground deformation, magma/fault interactions, and explosive vents. We outline how laboratory models have yielded insights into the main geometric and mechanical controls on the development of each part of the volcanic

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“…A more limited number of studies focused on the role of strong domains in the origin of intra-plate mountain belts (Calignano et al, 2015;Keep, 2000). Among these, Calignano et al (2015) considered the role of a strong domain embedded within a weak lithosphere.…”

Section: Introductionmentioning

confidence: 99%