Horizon controls a number of prospective tenements within the Coolgardie region including Rose Hill, Brilliant North and Yarmany. Together, the projects are grouped under the title of Coolgardie Regional.
ROSE HILL
Horizon acquired the Rose Hill project in late 2019 as part of the asset swap with Northern Star Resources. Rose Hill is located 0.5km southeast of Coolgardie and 35km west of Kalgoorlie-Boulder, and lies on the western margin of the Archean Norseman-Menzies Greenstone Belt.
Mineralisation is hosted within the main Rose Hill porphyry, adjacent to the hanging wall ultramafic and an eastern porphyry unit. Gold is associated with stockwork veining throughout the porphyry and disseminated within altered porphyry. The mineralised porphyry is believed to have dioritic affinities.
The current JORC 2012 resource at Rose Hill is:
0.8Mt grading 3.7g/t Au for 93,300ozÂ
which is comprised of an open pit Mineral Resource of 0.3Mt grading 2.0g/t Au for 18,400oz at a 0.5g/t Au cut-off grade and underground Mineral Resource of 0.5Mt grading 4.6g/t Au for 74,900oz at a 2.0g/t Au cut-off grade. Importantly, 70% of the resource is in the Measured and Indicated JORC Categories.
Rose Hill has been subject to several small scale mining operations since 1898 with reported production of approximately 5,000t grading 8.3g/t Au for 1,340oz with the most recent being a small open cut in 1983.The mineralisation at Rose Hill extends to 300m and is being investigated via a feasibility study for both open pit and underground mining.Â
Significant true width intercepts supporting open pit mining include:
17m @ 3.08g/t Au from 0m
14m @ 4.11g/t Au from 21m
15m @ 3.46g/t Au from 22m
7m @ 7.26g/t Au from 27m
10m @ 6.28g/t Au from 28m
11m @ 8.79 g/t Au from 43m
Significant true width intercepts supporting underground mining include:
12m @ 4.81g/t Au from 37m
20m @ 8.94g/t Au from 77m
3.5m @ 10.52g/t Au from 170.5m
7.5m @ 5.40g/t Au from 242.3m
5m @ 3.66g/t Au from 281m and 5m @ 5.93g/t Au from 289.5m
3m @ 9.25g/t Au from 407mÂ
BRILLIANT NORTH
The Brilliant North lease (M15/1204), also known as the State Battery deposit due to its close proximity to the historic Coolgardie State Battery is located 500m to the southeast of Rose Hill and 35km west of the city of Kalgoorlie-Boulder.
The Brilliant North lease partially overlies the Brilliant North project currently owned by Focus Minerals. The development of the Brilliant North project area has been impeded in the past due to fragmented ownership of the leases. Horizon are currently reviewing the development options of Brilliant North in conjunction with the feasibility study to determine the optimal pathway for this project.
YarmAny EAST
Yarmany is located on the highly prospective Ida and Reptile Shear zones in close proximity to all required infrastructure, 65km west of Kalgoorlie-Boulder in Western Australia.
The Yarmany East tenure was retained by Horizon Minerals as it contains a highly prospective semi-contiguous >14km linear trend of anomalous gold and lithium soils/auger holes that contains spot highs of Li (up to 118ppm), Cs (up to 13.5ppm) and Rb (up to 197ppm). The anomalous lithium trend averages widths of 100m-300m and appears to parallel the adjacent north-west trending Reptile shear. One of the individual anomalies is 1.5km long and is orientated east-west. The Reptile Shear has demonstrated gold mineralisation but has received negligible lithium exploration in the past (see Figures to the right).
