IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Dacite

This page is currently not sponsored. Click here to sponsor this page.
Name:
After the ancient Roman province of Dacia (now part of Romania).
Dacitic rocks with felsics comprising >20% quartz and alkali feldspar/plagioclase <0.5.
A fine-grained extrusive rock with a similar general composition to andesite, but having a more sodic plagioclase and more K-feldspar and quartz; it is the extrusive equivalent of granodiorite.

Synonym: quartz andesite.


Hide all sections | Show all sections

Classification of DaciteHide

Dacite appears in fields 4 and 5 in the QAPF diagram.

Dacite is found in field 'O3' in the TAS diagram.

Sub-divisions of DaciteHide

Mineralogy of DaciteHide

Essential minerals - these are minerals that are required within the classification of this rock:
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
Amphibole > HornblendeAn informal name for dark green to black amphiboles, mostly ferro-hornblende or ...
Feldspar > Alkali FeldsparFeldspar Group minerals rich in Potassium or Sodium.
Pyroxene > Clinopyroxene > Augite(CaxMgyFez)(Mgy1Fez1)Si2O6

Internet Links for DaciteHide

mindat.org URL:
https://www.mindat.org/min-48447.html
Please feel free to link to this page.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 23, 2018 12:42:32 Page generated: September 5, 2018 23:05:36
Go to top of page