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Stress orientation–dependent reactions during metamorphism

2019; Geological Society of America; Volume: 47; Issue: 2 Linguagem: Inglês

10.1130/g45632.1

1943-2682

Jo Moore, Andreas Beinlich, Håkon Austrheim, Andrew Putnis,

High-pressure geophysics and materials

Research Article| January 04, 2019 Stress orientation–dependent reactions during metamorphism Jo Moore; Jo Moore * 1The Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences, Curtin University, Perth, WA 6845, Australia *E-mail: josephine.moore@postgrad.curtin.edu.au Search for other works by this author on: GSW Google Scholar Andreas Beinlich; Andreas Beinlich 1The Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences, Curtin University, Perth, WA 6845, Australia Search for other works by this author on: GSW Google Scholar Håkon Austrheim; Håkon Austrheim 2Physics of Geological Processes (PGP), The Njord Centre, Department of Geosciences, University of Oslo, 0316 Oslo, Norway Search for other works by this author on: GSW Google Scholar Andrew Putnis Andrew Putnis 1The Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences, Curtin University, Perth, WA 6845, Australia3Institut für Mineralogie, University of Münster, Münster 48149, Germany Search for other works by this author on: GSW Google Scholar Author and Article Information Jo Moore * 1The Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences, Curtin University, Perth, WA 6845, Australia Andreas Beinlich 1The Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences, Curtin University, Perth, WA 6845, Australia Håkon Austrheim 2Physics of Geological Processes (PGP), The Njord Centre, Department of Geosciences, University of Oslo, 0316 Oslo, Norway Andrew Putnis 1The Institute for Geoscience Research (TIGeR), School of Earth and Planetary Sciences, Curtin University, Perth, WA 6845, Australia3Institut für Mineralogie, University of Münster, Münster 48149, Germany *E-mail: josephine.moore@postgrad.curtin.edu.au Publisher: Geological Society of America Received: 24 Sep 2018 Revision Received: 04 Dec 2018 Accepted: 06 Dec 2018 First Online: 04 Jan 2019 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2019 Geological Society of America Geology (2019) 47 (2): 151–154. https://doi.org/10.1130/G45632.1 Article history Received: 24 Sep 2018 Revision Received: 04 Dec 2018 Accepted: 06 Dec 2018 First Online: 04 Jan 2019 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Jo Moore, Andreas Beinlich, Håkon Austrheim, Andrew Putnis; Stress orientation–dependent reactions during metamorphism. Geology 2019;; 47 (2): 151–154. doi: https://doi.org/10.1130/G45632.1 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 Grain-scale pressure variations have been recognized as an important driver for the formation of distinct mineral assemblages during high- and ultrahigh-pressure metamorphism. However, the effects of differential stress acting during hydration of granulite remain underexplored. Here, we present textural evidence for the orientation dependence of two distinct amphibolite-facies plagioclase grain boundary replacement assemblages that formed in response to differential stress during the early stage of lower-crustal hydration. The two assemblages, A1 (zoisite, kyanite, and quartz) and A2 (plagioclase and K-feldspar), are indicative of contemporaneous formation at local equilibrium conditions at ∼700 °C and 1.1 GPa and 0.9 GPa, respectively. Mineral replacement was accompanied by minor redistribution of chemical components by the alteration fluid in response to the heterogeneous stress field and local equilibria. Thus, our observations provide new insight into the driving forces for pressure solution and indicate that differential stress and fluid-induced mass transfer may define the evolution of metamorphic assemblages. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.