LARGE SPECIMEN OF QUARTZ MONZONITE FROM BEAVER CO., UTAH

Description

THIS IS A LARGE SPECIMEN OF
QUARTZ MONZONITE
.
THE SPECIMEN IS
APPROXIMATELY 13 X 8 X 6 cm
.  AND
WEIGHS 648.8 gm.
THE SPECIMEN IS FROM THE
ROCKY RANGE, NEAR MILFORD, BEAVER CO., UTAH
.  THE SPECIMEN IS CLEAN AND BRIGHT AND IT DISPLAYS WELL.  QUARTZ MONZONITE, ALSO OFTEN REFERRED TO AS GRANODIORITE, IS A GRANITIC TYPE OF IGNEOUS INTRUSIVE ROCK TYPE THAT IS OFTEN THE HOST TO LOW GRADE, DISSEMINATED COPPER AND MOLYBDENUM DEPOSITS, KNOWN AS "PORPHYRY DEPOSITS".  QUARTZ MONZONITE IS THE GRANITIC TYPE ROCK THAT IS CHARACTERIZED BY HAVING NEAR EQUAL AMOUNTS OF BOTH ALKALI AND PLAGIOCLASE FELDSPARS ALONG WITH QUARTZ AND A VARIETY OF OTHER SILICATE MINERALS SUCH AS BIOTITE, HORNBLENDE, ETC.  THIS PARTICULAR INTRUSION WAS FOLLOWED BY HYDROTHERMAL SOLUTIONS DEPOSITING VERY HI-GRADE COPPER ORE BODIES ON THE CONTACT BETWEEN THE INTRUSIVE MAGMA AND THE COUNTRY ROCK.  IT IS FROM A RELATIVELY OBSCURE LOCALITY.  IT WAS COLLECTED IN 1988.
SEE PICTURES.  I WILL COMBINE SHIPPING WHEN POSSIBLE.  THANKS FOR LOOKING.