Ductile fractures and magma migration from source

Research Article| April 01, 2010 Ductile fractures and magma migration from source Roberto F. Weinberg; Roberto F. Weinberg 1School of Geosciences, Monash University, Clayton, Victoria 3800, Australia Search for other works by this author on: GSW Google Scholar Klaus Regenauer-Lieb Klaus Regenauer-Lieb 2School of Earth and Geographical Sciences, The University of Western Australia, Perth, Western Australia 6009, Australia, and Commonwealth Scientific and Industrial Research Organisation (CSIRO) Exploration Ductile fractures and magma migration from source. Geology 2010;; 38 (4): 363–366. doi: https://doi.org/10.1130/G30482.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Mechanisms proposed to explain efficient melt transport away from hot, ductile source regions are problematic. Brittle-elastic fracturing is a well-known mechanism that allows fast magma migration as dikes through cold crust. Ductile fractures have been propo sed as an alternative for ductile environments, where brittle-elastic diking is inhibited. Ductile fracturing results from rock creep and growth of microscale voids that become interconnected, leading to rock failure. In this paper, we present observations and numerical models supporting the hypothesis that ductile fracture controls early steps in magma migration. We postulate that once developed, ductile fracture dikes may reach a critical length where magma stresses at dike tips overcome fracture toughness and lead to brittle-elastic diking, which subsequently controls magma migration. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.