VESPER PEAK SKARN
Snohomish County, Washington, USA

LOCALITY IMAGES


GEOLOGY
Skarn Deposit, periphery of tonalite exposed on Vesper Peak (Squire Creek stock) - Oligocene (between 33.9 million to 23 million years before the present). The skarn deposit resulted from contact metasomatism of a limestone pod in Jurassic age sedimentary rock (predominately ribbon chert) adjacent to the tonalite intrusion.

MINERALS (Cannon,1991) CLICK for PHOTOGRAPHED
   Apatite- Ca5(PO4)3(Cl)
   *Augite- Ca(Mg,Fe)2+(Si2O6)
   Calcite- CaCO2
   Chalcopyrite-
   *Clinozoisite
   Ferro-axinite-
*Garnet (var. grossular)-
   Hedenbergite- CaFe2+(Si2O6)
   Laumontite-
   Molybdenite-
   Parawollastonite-
*Prehnite-
   Pyrrhotite-
   Quartz- SiO2
   Titanite-
* photographed
 
AUGITE

 
CLINOZOISITE
Photo Copyright Saul Krotki 2007

 
Grossular GARNET

 
PREHNITE




REFERENCES

Cannon, Bart, (November-December 1991) The Vesper Peak Garnet Deposit, Snohomish County, Washington. Rocks & Minerals. 66(06), 478-484.