World Library  
Flag as Inappropriate
Email this Article

Incompatible element

Article Id: WHEBN0001948939
Reproduction Date:

Title: Incompatible element  
Author: World Heritage Encyclopedia
Language: English
Subject: Crust (geology), Europium anomaly, Lamproite, Rubidium-strontium dating, Kimberlite
Collection: Geochemistry, Igneous Petrology
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Incompatible element

In petrology and geochemistry, an incompatible element is an element that is unsuitable in size and/or charge to the cation sites of the minerals, and is defined by the partition coefficient between rock-forming minerals and melt being much smaller than 1.[1]

During the fractional crystallization of magma and magma generation by the partial melting of the Earth's mantle and crust, elements that have difficulty in entering cation sites of the minerals are concentrated in the melt phase of magma (liquid phase).

Two groups of incompatible elements that have difficulty entering the solid phase are known by acronyms. One group includes elements having large ionic radius, such as potassium, rubidium, caesium, strontium, barium (called LILE, or large-ion lithophile elements), and the other group includes elements of large ionic valences (or high charges), such as zirconium, niobium, hafnium, rare earth elements (REE), thorium, uranium and tantalum (called HFSE, or high field strength elements).[1]

Another way to classify incompatible elements is by mass: light rare earth elements (LREE) are La - Sm, and heavy rare earth elements (HREE) are Eu - Lu. Rocks or magmas that are rich, or only slightly depleted, in light rare earth elements are referred to as fertile, and those with strong depletions in LREE are referred to as depleted.[2]

References

  1. ^ a b Albarède, Francis (2003). Geochemistry: an introduction. Cambridge University Press.  
  2. ^ Mange, Maria A.; Wright, David Thomas (2007). Heavy minerals in use 58. Elsevier. p. 370.  
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 


Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.