Depletion of light rare-earth elements in felsic magmas

Abstract

Research Article| March 01, 1982 Depletion of light rare-earth elements in felsic magmas Calvin F. Miller; Calvin F. Miller 1Department of Geology, Vanderbilt University, Nashville, Tennessee 37235 Search for other works by this author on: GSW Google Scholar David W. Mittlefehldt David W. Mittlefehldt 2Department of Geology and Mineralogy, Ben Gurion University of the Negev, Beer Sheva 84 120, Israel Search for other works by this author on: GSW Google Scholar Geology (1982) 10 (3): 129–133. https://doi.org/10.1130/0091-7613(1982)10<129:DOLREI>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Calvin F. Miller, David W. Mittlefehldt; Depletion of light rare-earth elements in felsic magmas. Geology 1982;; 10 (3): 129–133. doi: https://doi.org/10.1130/0091-7613(1982)10<129:DOLREI>2.0.CO;2 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 Contrary to simple generalizations about their behavior, light rare-earth elements (LREE) do not act as incompatible elements in very felsic magmas. In fact, LREE concentrations typically decrease, often drastically, during differentiation of such magmas. The simplest explanation for this depletion involves the separation of minute, easily overlooked quantities of an extremely LREE-rich accessory mineral, either monazite or allanite. Our data indicate that felsic liquids with < 50 ppm LREE may be saturated in either of these accessories and that the concentration required for saturation decreases in increasingly felsic liquids. This accounts for incompatible behavior of LREE even at high concentrations in mafic magmas in contrast to compatible behavior at low concentrations in felsic magmas. Partitioning of LREE into solid rather than liquid has important implications for trace-element and Nd-isotope modeling of crustal anatexis, as well as for magma differentiation. 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.