from The Century Dictionary and Cyclopedia

  • Obtained from leaves.


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  • Mixed phyllic and chloritic dominant alteration occurs to 631 meters, then chlorite with magnetite alteration gradually diminishes to the end of the hole.

  • Chlorite alteration dominates throughout except for the interval from 92.2 to 393 meters where there is overprinting by phyllic assemblages.

  • Alteration in the andesite is mixed chlorite and phyllic dominant to the intrusion, and chlorite dominant from there until the end of the hole.

  • A phyllic (quartz-sericite-clay-pyrite) alteration assemblage dominates to a depth of 198 meters, then a mixed zone where phyllic assemblages are superimposed on earlier chloritic assemblages (quartz-chlorite-pyrite) down to 394 meters.

  • The pyritic zones which contain 5-7% pyrite and local chalcopyrite are associated with strong local "potassic" and pervasive "phyllic" alteration zones intruded by strongly epidote altered dykes.

    The Earth Times Online Newspaper

  • Duran geologists have identified extensive zones with stockwork quartz veinlets and oxidized pyrite, which are part of a large phyllic alteration system that grades outwards to zones of argillic and propylitic alteration.

    Marketwire - Breaking News Releases

  • The tuff and quartz monzonite have undergone argillic and phyllic alteration and can carry anomalous gold values.

    Star Gold Corp. Explores Its Excalibur and Longstreet Projects in Nevada - Yahoo! Finance

  • Gold in this area occurs in quartz veins and breccias within fault zones and the veins have wide argillic alteration envelopes and zones of quartz-sericite-pyrite phyllic alteration and limonite.

    Star Gold Corp. Explores Its Excalibur and Longstreet Projects in Nevada - Yahoo! Finance

  • Alteration at the Project is predominantly phyllic with silica flooding in the mineralized zone.

    Marketwire - Breaking News Releases

  • Mineralized porphyry shows classic potassic and local weak phyllic alteration typical of the main mineralized zone on the property. News Articles


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