Notices
Results 1 to 3 of 3

Thread: Can granite be produced from basaltic magma?

  1. #1 Can granite be produced from basaltic magma? 
    New Member
    Join Date
    Sep 2012
    Posts
    1
    Is there any means that granite can be produced from basaltic magma?


    Reply With Quote  
     

  2.  
     

  3. #2  
    Universal Mind John Galt's Avatar
    Join Date
    Jul 2005
    Posts
    14,168
    Possibly, but not in large quantity. As the higher temperature (and simpler) minerals crystalise out of a magma melt, the silica content rises. In certain circumstances this may lead to the production of a granitic magma. It is probably more likely to be erupted as rhyolite. Most granites are generated through metamorphism and in some cases melting of continental crust.

    One large caveat on this: I'm laying out the thinking on granite from basalt as it was envisaged forty years ago. Since then my interest has focused on basalt formation and I doubt if I have read more than one paper on granite origin in that time, so this scenario may now have been discarded. (Though it makes perfect sense to me still.)

    Edit: Now you've starte me thinking. It almost certainly needs at least some assimilation of country rock to account for Rare Earth and isotope abundances. Damn, you've just added at least a year to the age I have to live to in order to answer all the questions I want answers for, but I'll forgive you and say welcome to the forum.


    Reply With Quote  
     

  4. #3  
    Brassica oleracea Strange's Avatar
    Join Date
    Oct 2011
    Location
    喫茶店
    Posts
    17,036
    Quote Originally Posted by John Galt View Post
    It almost certainly needs at least some assimilation of country rock....
    You mean, like The Eagles?
    ei incumbit probatio qui dicit, non qui negat
    Reply With Quote  
     

Similar Threads

  1. Magma
    By filix in forum Earth Sciences
    Replies: 8
    Last Post: January 7th, 2012, 10:49 AM
  2. Why is hydrogen produced from hydrocarbons instead of water?
    By icewendigo in forum Mechanical, Structural and Chemical Engineering
    Replies: 2
    Last Post: June 15th, 2010, 12:31 PM
  3. From Granite to mud
    By dg2008 in forum Earth Sciences
    Replies: 4
    Last Post: April 23rd, 2009, 12:57 AM
  4. why is the basalt beneath the granite?
    By heaventian in forum Earth Sciences
    Replies: 11
    Last Post: December 23rd, 2008, 05:01 PM
  5. Spectrum produced by an incandescent solid
    By Photon in forum Physics
    Replies: 1
    Last Post: June 27th, 2006, 02:37 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •