Research Article| November 01, 2015 Melt inclusion shapes: Timekeepers of short-lived giant magma bodies Ayla S. Pamukcu; Ayla S. Pamukcu 1Department of Earth, Environmental and Planetary Sciences, Brown University, 324 Brook Street, Providence, Rhode Island 02912, USA Search for other works by this author on: GSW Google Scholar Guilherme A.R. Gualda; Guilherme A.R. Gualda 2Department of Earth and Environmental Sciences, Vanderbilt University, 2301 Vanderbilt Place, Nashville, Tennessee 37235, USA Search for other works by this author on: GSW Google Scholar Florence Bégué; Florence Bégué 3Geological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Search for other works by this author on: GSW Google Scholar Darren M. Gravley Darren M. Gravley 3Geological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Search for other works by this author on: GSW Google Scholar Author and Article Information Ayla S. Pamukcu 1Department of Earth, Environmental and Planetary Sciences, Brown University, 324 Brook Street, Providence, Rhode Island 02912, USA Guilherme A.R. Gualda 2Department of Earth and Environmental Sciences, Vanderbilt University, 2301 Vanderbilt Place, Nashville, Tennessee 37235, USA Florence Bégué 3Geological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Darren M. Gravley 3Geological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand Publisher: Geological Society of America Received: 27 May 2015 Revision Received: 21 Aug 2015 Accepted: 24 Aug 2015 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2015 Geological Society of America Geology (2015) 43 (11): 947–950. https://doi.org/10.1130/G37021.1 Article history Received: 27 May 2015 Revision Received: 21 Aug 2015 Accepted: 24 Aug 2015 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Ayla S. Pamukcu, Guilherme A.R. Gualda, Florence Bégué, Darren M. Gravley; Melt inclusion shapes: Timekeepers of short-lived giant magma bodies. Geology 2015;; 43 (11): 947–950. doi: https://doi.org/10.1130/G37021.1 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 The longevity of giant magma bodies in the Earth’s crust prior to eruption is poorly constrained, but recognition of short time scales by multiple methods suggests that the accumulation and eruption of these giant bodies may occur rapidly. We describe a new method that uses textures of quartz-hosted melt inclusions, determined using quantitative three-dimensional propagation phase-contrast X-ray tomography, to estimate quartz crystallization times and growth rates, and we compare the results to those from Ti diffusion profiles. We investigate three large-volume, high-silica rhyolite eruptions: the 240 ka Ohakuri-Mamaku and 26.5 ka Oruanui (Taupo Volcanic Zone, New Zealand), and the 760 ka Bishop Tuff (California, USA). Our results show that (1) longevity estimates from melt inclusion textures and Ti diffusion profiles are comparable, (2) quartz growth rates average ∼10−12 m/s, and (3) quartz melt inclusions give decadal to centennial time scales, revealing that giant magma bodies can develop over notably short historical time scales. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.