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Nexus Minerals provides results from RC drill program at Pinnacles Gold Project

Published 05 October 2017

Eastern Goldfields gold explorer Nexus Minerals has announced the first set of results of its recently completed 4,108m RC drill program at the Pinnacles Gold Project.

The highlight being drill hole NMPRC40 which intersected 4m @ 19.74g/t Au from 68-72m.

The recently completed RC drill program was designed to test three previously identified high order auger soil geochemistry gold anomalies – GT5, GT6 and GT8. Samples have been submitted for analysis throughout the program, with results of the 4m composite sampling expected over the next 3 weeks. Individual 1m samples will then be collected and submitted for analysis, on any composite sample returning >0.1g/t Au or exhibiting interesting geological features.

GT5 Anomaly

Results (4m composites) have been received from 7 only of the 17 GT5 RC drill holes – being NMPRC38 to NMPRC44.

RC drill hole NMPRC40 intersected 4m @ 19.74g/t Au from 68-72m, in a highly sheared and altered lithology. The hole is located in the centre of the southernmost line targeting both the auger soil anomaly and the interpreted structure.

The GT5 high priority 2.4km x 300m gold anomaly (max 107.1ppb Au +Bi-Te-Mo pathfinder elements), shows good strike continuity and is striking north-south within a sheared ultramafic unit. This area is located in a gravity low and had been highlighted previously as a zone of interest from Nexus regional aeromagnetic assessment and interpretation.

Auger soil programs sampling density was reduced to 50m x 40m to better define the 400m x 200m >80ppbAu core of the anomaly. The area was also covered with a high-resolution ground magnetic survey confirming and identifying structural targets. These combined data sets have resulted in targets being defined and tested in the recent RC drill program. 

Pinnacles Gold Project

The combined Pinnacles Gold Project area covers 125km2 of highly deformed Archaean greenstone sequence of basalts, dolerites, and co-magmatic high-level intrusions. This mafic volcanic association is overlain by a series of medium to coarse grained volcaniclastic sandstones and subordinate felsic volcanic rocks. These greenstones have been intruded and disrupted by the forceful intrusion of a series of granitoid rocks. This geological and structural setting is considered to be highly prospective for gold mineralisation.

The project tenements are underlain by a north-south trending Archaean greenstone sequence with the Carosue Basin volcaniclastic sediments dominating to the east of the Yilgangi Fault. To the west of the Yilgangi Fault a more mafic dominated package is observed consisting of volcaniclastic sediments intercalated with basalt and ultramafic rock units with minor units. This greenstone sequence is sandwiched between two ovoid Archaean granitoid plutons to the east and the west.

Structurally the region is cut by a series of north-south trending faults with offsets of tens to hundreds of metres. These faults are particularly common in this Carosue Dam region as the greenstone belt passes through a relatively narrow “neck” between the two granitoids. This is also the area where most of the known Carosue Dam mineralisation is concentrated. Mineralisation is known to occur proximal to, and east and west of the Yilgangi Fault. This fault is a major feature that dissects the Nexus tenement package for a strike distance of some 15km.

Auger sampling targeting calcareous soils (calcrete) has been successfully employed as the preferred geochemical sampling medium for gold exploration in the Eastern Goldfields for the past decade. Mineralisation in the Carosue Dam district, including Karari, Whirling Dervish, Luvironza, Monty Dam and Twin Peaks deposits were all identified using this technique. Historically any auger soil result of >9ppb Au was considered anomalous and targeted for follow up work.



Source: Company Press Release