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
 
HEDENBERGITE

 
CLINOZOISITE
Photo Copyright Saul Krotki 2007

 
CLINOZOISITE, HEDENBERGITE,
GROSSULAR garnet
John Lindell Collection

 
GROSSULAR garnet

 
GROSSULAR garnet
John Lindell Collection

 
AXINITE on GROSSULAR garnet
John Lindell Collection

 
PREHNITE with HEDENBERGITE
John Lindell Collection

 
PREHNITE



QUARTZ epimorph after CALCITE
John Lindell Collection

 
GROSSULAR garnet on QUARTZ
John Lindell Collection

 
Gemmy TITANITE
John Lindell Collection




REFERENCES

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