Printer Friendly
The Free Dictionary
982,669,835 visitors served.
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

mafic rock

   Also found in: Wikipedia, Hutchinson 0.08 sec.

mafic rock

In geology, any igneous rock dominated by the silicates pyroxene, amphibole, olivine, and mica. These minerals are high in magnesium and ferrous iron, and their presence gives mafic rock its characteristic dark colour. It is usually contrasted with felsic rock. Common mafic rocks include basalt and gabbro.


?Page tools
Printer friendly
Cite / link
Email
Feedback
? Mentioned in ? References in periodicals archive
 
The outcrop displays intense potassic alteration of the monzonite and biotite alteration of the mafic rocks.
Gold mineralization occurs in quartz tourmaline ankerite veins located at the contact of ultramafic and mafic rocks as well as quartz porphyry intrusive hosted mineralization.
Gold deposits in the Coolgardie area are structurally controlled and occur within all lithotypes as 1) replacement orebodies in ductile-brittle shear zones; 2) shear zone hosted quartz reefs; and 3) brittle vein sets within competent mafic rock units.
 
Encyclopedia browser? ? Full browser
 
 
Encyclopedia
?

Disclaimer | Privacy policy | Feedback | Copyright © 2008 Farlex, Inc.
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Terms of Use.