Castle Minerals Limited (ASX: CDT) reported that six gold and three copper anomalies were delineated following an extensive broad-spaced reconnaissance auger sampling programme at its Polelle project in the Meekatharra gold mining district of Western Australia.
CDT said that none of the newly defined anomalies were previously drilled. The company said that gold anomalies were associated with shear-hosted style mineralisation while the copper anomalies were indicative of volcanogenic massive sulphide (VMS) style mineralisation.
The company said that the 58km2 programme was conducted over areas of relatively shallow cover comprising 36% of the Polelle licence. This was the project’s first large-scale systematic geochemical survey.
CDT said that the geologists are now on site field checking all anomalies ahead of animminent infill sampling campaign to better define and ranktargets prior to drilling.
The Polelle project (E51/1843, 144.5km²) is located 25km south of Meekatharra and 7km southeast of the operating Bluebird Mine.
Recent high-resolution aeromagnetic survey had indicated that the southwest trending Albury Heath shear is traceable onto the Polelle project area for some 7.5km.
Auger sampling programme
The company had recently commenced an extensive broad-spaced reconnaissance auger sampling programme at the Polelle project. The auger programme comprised 1,877 samples collected at 80m intervals on 400m spaced lines and covered an area of 58km2, representing 36% of the 162.5km2 total Polelle licence area.
CDT said that samples were analysed for gold and a broad suite of base metal and pathfinder elements. The company announced that the augur sampling program has delineated gold and copper anomalies at Polelle project.
Six gold and three copper anomalies
The company reported that six gold anomalies (Au1 – Au6) and three copper anomalies (Cu1 – Cu3) were delineated at the Polelle project. The anomalies are subject to field confirmation.
Six gold anomalies
CDT reported that the Au 1 has a north-south strike of some 800m and is associated with a narrow belt of felsic volcano-clastics and north-south trending structures within a basalt unit; Au 2 is the largest of the gold anomalies with a north-south strike of some 2.4km and lies entirely in basalt units within a north-south structural corridor that hosts a newly recognised felsic intrusion in the northern part of the anomaly; Au 3 is associated with an interpreted northeast trending structure that appears to be a splay off the mineralised Albury Heath Shear and which also occurs along the contact between basalts and a felsic unit; Au 4 is a consistent, 2km strike, low-order anomaly located within basalts bounded by north-south shears and intersecting northwest trending structures; Au 5 is a 400m northwest-trending anomaly within basalts and appears to be associated with a northwest-trending structure cross-cutting the lithology; and Au 6 is a 400m north-south anomaly along the contact between felsic volcanics and an ultramafic unit.
Three copper anomalies
The company said that Cu 1 is a zone of consistently anomalous copper occurring along the northern extension of the same structure as the Au 3 and the Cu 1 anomaly extends for over 2km within basalts and lies close to a contact with a felsic unit; Cu 2 comprises a robust 1.6km x 0.9km north-trending anomaly occurring within basalts and is possibly indicative of volcanic massive sulphide style mineralisation; and Cu 3 is an 800m low-order copper anomaly within basalts in close proximity to folded felsic sedimentary rocks.
The company reported that Castle geologists are presently on-site undertaking a field inspection and ground truthing of all anomalies. CDT said that they are also planning the details of an infill auger programme which, subject to results, would be followed by a multi-target drilling programme.
Managing Director, Stephen Stone said “The delineation of six gold and three copper anomalies at Polelle is very encouraging given this expansive project area is largely soil covered and has received minimal attention compared to the more exposed areas of the prolific Meekatharra mining district.
Castle’s geologists are on-site now field checking the anomalous areas ahead of an infill auger programme which we hope will be followed shortly after by a maiden drilling programme at Polelle.”