Monzonite

Classification：Igneous Rock

A neutral pluton with lithology between syenite and diorite. The content of alkaline feldspar and plagioclase is quite similar, and does not contain or contain a small amount of quartz.

Monzonite is a transition from syenite to diorite or to gabbro. The content of plagioclase and K-feldspar is nearly equal, all two are >30%, with typical two long structure. Compared with syenite, plagioclase is mainly intermediate feldspar to feldspar. According to the types of dark minerals, they are subdivided into biotite Monzonite, hornblende Monzonite and pyroxene Monzonite. Monzonite is a neutral rosy and gray fully crystalline intrusive rock. The English name "monzonite" comes from a place name Monzone of the Alps Tyrol, first described in 1895 by W C Brogger.

The main mineral components of Monzonite are plagioclase (An30-50), micro plagioclase and alkaline feldspar, and dark minerals such as ordinary pyroxene, common hornblende and biotite. The approximate content of plagioclase and alkaline feldspar
When the content of quartz is <5%. The typical structure of Monzonite is the two long structure, that is, the self form plagioclase and the self form and half self form dark minerals are wrapped by the feldspar. The hypabyssal porphyritic structure can, phenocrysts of plagioclase and K-feldspar, called two porphyry.
Monzonite is a transitional type of diorite to syenite. It can be produced as an independent small rock type or can be associated with syenite and diorite. Monzonite related minerals are mainly skarn type iron deposits.