| Granites and Earth Evolution. |
| Excursion Guide. |
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2.1. Stops (see page12 - Fig. 6):
Stop 1.
(a) One of the latest plutonic
bodies of gabbroids in coarse-grained quartz syenites;
(b)
accumulation
of composite leucogranite-basite dikes that cut both gabbroids and
quartz syenites, and apophyses of middle-grained granites (granites
of 2-nd
phase);
(c) intrusive contact of quartz
syenites and granites.
Stop 2.
Contact
zone of gabbroid body:
(a) quenching zone along
marginal part of gabbro body and neighboring zone of remelting in
host coarse-grained quartz syenites with evidence of magmatic
mixture;
(b) composite
dike in quartz syenites near contact zone; basite enclaves are
oriented along strike of dikes, locally, with signs of plastic
deformations.
Stop 3.
Railway
hollow:
The cutting
body of gabbroids in quartz syenites with signs of melting. Composite
leucogranite (aplite)-basite dike more than 5 metres thick with
pillow-like basite enclaves up to 2 m in size that cuts
midddle-grained gabbros.
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