and MacEwan, D.M.C: 1951, Some chloritic
clay minerals of unusual type.
The metamorphic basement and/or Glenkeen Formation are everywhere separated from the Carboniferous conglomerate-dominated sedimentary successions by faults, marked by chloritic
breccia and microbreccia developed within both metamorphic basement and Glenkeen Formation.
The areas of intense K-feldspar enrichment were less directly associated with porphyry gold and copper mineralization than sericitic and chloritic
alteration; potassium anomalies' proximity to mineralization provided evidence of significant fluid/rock interaction associated with mineralization Areas A and C were interpreted as potassium alteration providing powerful exploration guidance for locating mineralised areas
Remarkable is also their determination (Mowatt and Naidu, 1987) of mixed-layer structures of indetermined character in the more detailed studied sediments deposited in the Colville River, which "presumably represent weathered/altered micaceous and/or chloritic
phases, as well as mixed-layer materials (illite-smectite, etc.) of diagenetic origin derived from sedimentary rocks".
The crystal sheaves sit on a dark matrix or a green chloritic
matrix which makes for an attractive contrast.
The main rock types are slates, quartzites, conglomerates, and sericitic and chloritic
phyllites and schist, with some interbedded calc-silicate rocks (Martin-Izard et al., 2002).
A feature common to many samples of the MFU and less common in the LFU and UFU is the presence of a fine-grained chloritic
phase lining vesicles.
alteration of the subvolcanic dacitic intrusives.
The widespread potassic and chloritic
alteration, visible copper minerals and associated vuggy anhydrite fractures, indicated that the hole was drilled within a large poorly exposed porphyry copper gold system.The high pyrite to chalcopyrite ratio, the lack of intrusive rocks, and the distribution of more volatile and distal peripheral element assemblages (arsenic antimony lead and zinc) suggest that the Hole PEED1 was drilled into the edge of a porphyry system, in an outer alteration zone which would not be expected to host ore grade copper gold mineralisation.A review of the geophysical and geochemical data has highlighted a 6km x 500m combined magnetic and airborne electromagnetic anomaly centred about 1km to the southwest.
clay, a product of low-temperature retrograde metamorphism and possibly also of corrosive meteoric water, occurs in many pockets as milky green to dark green, fine-grained inclusions imparting a greenish color to quartz.