deformed pegmatites, similar in character to those encountered further west on Arrow’s Malinda Lithium prospect, were first identified on the Zeus building E09/2147 in the third quarter of 2021 (See announcement Zeus ASX, October 1, 2021) with subsequent mapping locating the Pegmatite Creek prospect in Q4 2021 (See the announcement Zeus ASX, December 17, 2021).
Recent fieldwork during the second quarter of 2022 targeted the prospective zone extending outward from the intrusive contact of the thirty-three supersuite granitoids.
Figure 3. Extensive lava blanket in a quartz sheet covering the metamorphosed contact between the vegetated granitoids of the Thirty-Three Supersuite (RHS) and the metasedimentary host rock. Arrow pointing to the location of the Pegmatite Creek prospect (see Figure 6).
The prospective zone extending outward from the margins of potential granites in the host metasediments is largely obscured by extensive quartz sheet lava cover (Figure 3) derived from weathering of the intrusive granitoid.
At the Pegmatite Creek prospect, numerous pegmatites are exposed by erosion along the flanks of the Granite intrusive, with recent winter rains fortuitously facilitating better exposure of the outcrops.
Mapping indicates that the core of the intrusive is composed of K-feldspar-quartz-muscovite/biotite granite surrounded by a siliceous outer carapace of quartz-albite-tourmaline granite containing extensively developed pegmatites and quartz-tourmaline veins .
A 50-200 m wide transition margin (narrowing to the southeast) contains interlocking quartz veins, quartz pegmatites, tourmaline-rich zones and migmatized biotite-cordierite schists. The contact metamorphic aureole, in which regional chlorite-sericite-garnet schists are metamorphosed to biotite-cordierite schists, extends outward about 500 m from the parent granite.
Individual pegmatites (Figure 4) and pegmatite swarms (Figure 5) are observed penetrating along the NW-SE dominant regional metamorphic fabric. Signs of zoning have been observed in the largest pegmatites and some pegmatites appear to be recrystallized, sheared and boudinaged by post-intrusion deformation.