| Abstrakt: |
Post-magmatic metasomatism of Maykhura granites has produced two distinctive zonal sequences (in increasing degree of alteration) as follows: Sequence (A) of 1) unaltered granodiorite, 2) muscovite granodiorite, 3) tourmaline granite, 4) muscovite granite, 5) orthoclase granite, 6) quartzalbite granite, and 7) monomineralic quartz rock. Sequence (B) differs in that one of the external zones contains chlorite instead of tourmaline. Both zonal rock-type alteration sequences produce the same end product of a quartz-feldspar (albite) metasomite at the end of the sequence immediately before the final formation of monornineralic quartz rock.R.M. Hutchinson |
