Image 1: Drilling at Tombreen prospect, Mine River, November 2017
Eleven licences forming a contiguous block located in counties Wicklow and Wexford. Though the primary focus is gold exploration, lithium pegmatite targets are being explored adjacent to the western margin of the main block and Connemara is reviewing potential targets. The acquisition of former JV partner Hendrick Resources Ireland has increased the strike length of the primary gold target in Wicklow from around 5kms to 15kms. Drilling at two prospects, Tombreen and Knocknalour, is planned for Q1 and Q2 2018.
Figure 2: Outline of the Mine River licences indicated in red
The underlying geology of the licence block consists primarily of Ribband Group metasediments: a distal turbiditic succession of slates, siltstones and sandstones. Local occurences of intermediate to basic volcanic rocks are also noted. On the south-eastern margin of the licence, rocks of the Duncannon Group are present, consitingh of acid, intermediate and basic volcanic rocks with a minor sedimentary component.
From the Wicklow Gold Rush of 1795 to the present day, gold has and is being discovered in the streams and soils in Wicklow and Wexford. It is estimated that 7,000 to 9,000 oz of gold were extracted from alluvial gravels in the area of Mines River. Modern geochemical surveys in streams and soils completed on the block indicate significant strata-bound gold mineralisation associated with the contacts between Ordovician volcanics and metasediments.
Figure 3: Targets generated through extensive stream sampling
The principal trend follows the Caledonian northeast – southwest trend. The airborne geophysical survey flown by HRI in 2012 (combined with the Tara Exploration survey in 2000) has facilitated the development of a more robust structural model that puts the significant gold occurrences found to date into context. Known gold occurences from historic drilling, rock ‘float’ sampling and extensive soil/DOB assays (Figure 4 below) are interpreted to correlate with a target trend evident in the airborne magnetic data (as indicated in Figure 5 below).
Figure 4: Extensive Rock ‘float’, outcrop, soils and DOB sampling across target trend
Figure 5: Highlighted magnetic anomaly (calculated vertical derivative) in relation to targets along a 15 kilometre trend at Mine River
Connemara commenced drilling at two locations, Gibbet Hill and Tombreen, on the target trend in November 2017.
Three holes were drilled in December, one at the Tombreen target and two at Gibbet Hill. Assay results confirm 8 metres grading 4.53 g/t gold (Au) at Tombreen, including a 2 metre intersection grading 16.1 g/t Au. Mineralisation ranging from 0.17 g/t Au to 0.25 g/t Au over several intersections was confirmed in one of the holes at Gibbet Hill. In addition, prospecting activities have confirmed significant mineralisation in the area around Gibbet Hill, with surface samples reporting grades as high as 5.08 g/t Au. Results from the drill hole assays are presented in Table 1 below. The latest results confirm the area between Tombreen, Knocknalour and Gibbet Hill as the focus of the Mine River project. This extends for 5 kilometres at the southern end of the overall trend. Drill locations are highlighted in Figure 6 below.
Table 1: Assay results from Tombreen and Gibbet Hill drilling
Figure 6: 2017 drill locations (17-GH-01, 17-Gh-02, 17-TB-01) and historic drill collars