Viscosity regimes of homogeneous silicate melts

Abstract

Other| April 01, 1995 Viscosity regimes of homogeneous silicate melts Yan Bottinga; Yan Bottinga Institut de Physique du Globe, Department des Geomateriaux, Paris, France Search for other works by this author on: GSW Google Scholar Pascal Richet; Pascal Richet Search for other works by this author on: GSW Google Scholar Anne Sipp Anne Sipp Search for other works by this author on: GSW Google Scholar American Mineralogist (1995) 80 (3-4): 305–318. https://doi.org/10.2138/am-1995-3-412 Article history first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Yan Bottinga, Pascal Richet, Anne Sipp; Viscosity regimes of homogeneous silicate melts. American Mineralogist 1995;; 80 (3-4): 305–318. doi: https://doi.org/10.2138/am-1995-3-412 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 SocietyAmerican Mineralogist Search Advanced Search Abstract Extrapolation of laboratory measurements of the viscosity (η) of silicate melts is frequently needed in order to analyze petrological and volcanological processes. Therefore a general understanding of silicate melt viscosities is required. In this paper we survey the present state of our knowledge and distinguish three flow regimes for homogeneous silicate liquids: (1) a low-viscosity regime (η <1 Pa·s), where the viscosity obeys a temperature-dependence power law in accordance with mode coupling theory (these low viscosities are typical for depolymerized melts); (2) an intermediate regime (1 <η <1012 Pa·s), where silicate melt viscosity is determined by the availability of configurational states (the dependence of the viscosity on the temperature is described aptly by the configurational entropy theory of Adam-Gibbs); and (3) a high-viscosity regime, where the liquid has been transformed into a glass (η >1012 Pa·s) (this regime is not well known, but available measurements indicate an Adam-Gibbs or an Arrhenian temperature dependence of the glass viscosity). Examples are given of igneous rocks whose geneses were affected by these flow regimes. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.