The mafic metavolcanic rocks have been metamorphosed to assemblages of actinolite, chlorite, and albitic plagioclase; stilpnomelane
has also been reported (Campbell 1990).
In the metagranitoids, the primary plagioclase is typically replaced by albite and epidote-clinozoisite, whereas the primary mafic minerals are replaced by chlorite, amphibole or brown (or more rarely) green stilpnomelane
. Highly sheared serpentinites are the most abundant rock type in the ophiolitic melange, they seldom preserve primary igneous minerals but the presence of a chromium-rich spinel is almost pervasive.
Closely associated minerals are: quartz, albite, apatite and stilpnomelane
. Other associated minerals are: scandiobabingtonite, scandian ixiolite, hingganite-(Y), cerian epidote, titanite, plumbomicrolite and other microlite minerals, bazzite, milarite cassiterite and two unidentified tantalum minerals (rynersonite?
These include: annabergite, aragonite, argentopentlandite (Sirka, 1988), brochantite, chlorite (group), covellite, devilline, erythrite, gadolinite, gahnite, goethite, gold-silver (electrum), illite, kaolinite, langite, malachite, montmorillonite, natrojarosite, naumannite (Frigstad, 1972), palygorskite, posnjakite, scheelite, sepiolite (van der Wel, 1972), stilpnomelane
, sulfur, tetrahedrite and tremolite-actinolite.
The minerals of the matrix are less than 30 microns in size and consist of a rather isotropic intergrowth of K-feldspar, albite, quartz, white mica, chlorite, epidote, allanite, calcite, with accessory stilpnomelane
, biotite, pyrrhotite/pyrite, sphalerite, apatite, zircon, and ilmenite decomposed to titanite and rutile.
occurs as an accessory mineral in rocks of the district.
Associated minerals are: rhodochrosite, friedelite, hubnerite, sphalerite, stilpnomelane
, albite, barite, hausmannite, tephroite, welinite and an unidentified manganese vanadate.