The Carlow Castle gold, copper and cobalt project is located in the West Pilbara region of Western Australia, ~45 km by road east of the city of Karratha (Figure 1). Access is via the Northwest Coastal Highway and then by the unsealed Cheratta public road, which passes through the Project area. Carlow Castle is on the granted exploration license E47/1797 and is ~35 km from Artemis’ 100% owned Radio Hill Processing Plant.
The current Carlow Castle Mineral Resource covers a strike length of 1.2 km, and was successfully identified using SAM exploration in early 2018. In conjunction with geochemical anomalies, SAM targeting drove the Carlow Castle drilling program in 2018 that increased the maiden resource by 71% in February 2019, and subsequent SAM survey which has identified 21 new targets to the west of the current resource.
Recent structural mapping and evaluation of historical diamond core and trenching through the top of the resource area, led to a significant increase in the confidence levels of the project, and culminated in the new inferred Mineral Resource Estimate (MRE) announced on 20 November 2019, that increased metal content by 60% for gold, 25% for copper and 15% for cobalt.
The inferred MRE is now 418koz Au, 48kt Cu and 7kt Co within 8Mt @ 0.51% Cu, 1.6 g/t Au and 0.08% Co. The structural mapping programs and MRE have been carried out by independent mining Industry consultants, CSA Global.
During March 2020, 31 RC drill holes were completed for 3,716 metres (Figure 2), with the assay results released to the ASX on 6 May 2020. The RC drill program had three aims:
- Continue to define limits of mineralisation at depth and down dip and add ounces to further resource updates;
- Capture DHEM signatures of mineralisation for use in future resource and extensional and regional drill planning; and
- Commence systematic exploration of 21 undrilled SAM targets to the west and south of the Carlow Castle resource area.
Pleasingly in terms of the first objective, RC drilling below the resource (Figures 2 & 3) returned excellent grades and widths. It also extended mineralisation at depth and continued to show it remained open down dip to the east and to the south.
Secondly, a first-ever downhole electromagnetic (DHEM) programme at Carlow Castle was successful and revealed an identifiable signature of the higher-grade sulphide mineralisation. This will be used to efficiently target our future drilling to increase the resource area.
The final objective began with the first phase of systematic drilling of SAM targets, starting with 1-4 (Figure 4). This was designed to explore completely untested and open-strike geological extensions to the west of and adjacent to the current resource area. Several fence lines of shallow holes were completed over a strike of ~1km. Much of this area was deeply weathered but did not return widespread significant gold values.
Drilling intersected gold mineralisation in ARC208 (SAM target 4).
Carlow West Gold Project (Part of the Greater Carlow Area)
RC drilling at Carlow West (12km west of Carlow Castle and 25km south-east of Karratha, Figure 1) was completed with an 11 hole, 550m drill traverse through a section of the prospect that retuned rock chip assays of 1 to 9.89 g/t Au as reported to the ASX on 5 November 2018.
 See ASX Announcement 20 November 2019. The Company is not aware of any new information or data that materially affects the information included in this market announcement and, in the case of estimates of mineral resources, that all material assumptions and technical parameters underpinning the estimates in this market announcement continue to apply and have not materially changed.