Deformation Mechanisms and Strain Localization in the Mafic Continental Lower Crust ...
Chapter 4 has been published in Lithos as Degli Alessandrini et al. (2017) with title: Creep of mafic dykes infiltrated by melt in the lower continental crust (Seiland Igneous Province). Co-authors of this publication are Luca Menegon (University of Plymouth), Nadia Malaspina (University of Milano B...
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| Format: | Article in Journal/Newspaper |
| Language: | unknown |
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University of Plymouth
2018
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| Online Access: | https://dx.doi.org/10.24382/dspace/167 https://pearl.plymouth.ac.uk/handle/10026.1/12799 |
| Summary: | Chapter 4 has been published in Lithos as Degli Alessandrini et al. (2017) with title: Creep of mafic dykes infiltrated by melt in the lower continental crust (Seiland Igneous Province). Co-authors of this publication are Luca Menegon (University of Plymouth), Nadia Malaspina (University of Milano Bicocca), Arjan Dijkstra (University of Plymouth) and Mark Anderson (University of Plymouth) ... : The rheology and strength of the lower crust play a key role in lithosphere dynamics, influencing the orogenic cycle and how plate tectonics work. Despite their geological importance, the processes that cause weakening of the lower crust and strain localization are still poorly understood. Through microstructural analysis of naturally deformed samples, this PhD aims to investigate how weakening and strain localization occurs in the mafic continental lower crust. Mafic granulites are analysed from two unrelated continental lower crustal shear zones which share comparable mineralogical assemblages and high-grade deformation conditions (T > 700 °C and P > 6 Kbar): the Seiland Igneous Province in northern Norway (case-study 1) and the Finero mafic complex in the Italian Southern Alps (case-study 2). Case-study 1 investigates a metagabbroic dyke embedded in a lower crustal metasedimentary shear zone undergoing partial melting. Shearing of the dyke was accompanied by infiltration of felsic melt from the ... |
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