Tanami North Project Area
Overview
The Boco Prospect is located approximately 4km to the north of the Tregony Mineral Resource on EL31331 and is located within the Suplejack Shear Zone.
Historical drilling completed by Acacia Resources in 1998 and 1999 has returned results that will require follow up exploration drilling.
Much of the drilling in this area is either Rotary Air Blast (“RAB”) or Air Core with about 75% of these historic holes being less than 20m in depth. Prodigy Gold has reviewed the data and plans to drill some exploratory holes to further test this target area.
Magnetic and gravity data would imply that the Tregony and Boco areas are stratigraphically similar. Government mapping indicates a fault intersects with the north trending Suplejack shear zone and a northwest trending basement fault.
Aeromagnetic data indicates subtle north trending fold closures.
Boco Prospect Exploration History
The last systematic exploration to occur over the project area was completed by AngloGold Ashanti (AGA) and Acacia Resources between 1995 – 2000, following up on work (soils, rock chip and limited post hole campaigns) completed by Messenger and Dominion Mining in the early 1990’s. AGA’s strategy involved a first phase of regional soils and/or shallow VAC holes, with anomalous areas/quickly followed up a second phase of shallow RAB drilling combined with several regional stratigraphic traverses. With this strategy they discovered the Tregony Deposit and identified the Boco, Thomas, PhD, Five Mile, Maly, Montegue Duck, and Trucks Prospects.
Critical analysis of soils results indicates that the majority have been ineffective at screening areas that are covered by shallow aeolian sand cover, drainage or Cambrian Plateau basalts. The shallow cover (Aeolian sand, paleo-drainage) has masked the underlying rocks, resulting in inconclusive anomalism and thus have not been followed up with drilling.
Historic drilling only followed up where soil samples returned anomalous results. Large areas of Suplejack North remain effectively untested via drilling (including Boco), despite the presence of favourable lithological units.
Boco Prospect Geology
The lithology of the Boco area is interpreted to be similar to Tregony to the south; consisting of a sequence of Mt Charles Formation basalts and dolerite, with mafic interflow sediments, conformably overlain by the Killi Killi Formation. This sequence hosts a major N-S shear zone, termed the Suplejack Shear Zone (SSZ). Historically, the SSZ was interpreted as a low strain shear zone, where bedding is preserved, uniformly parallel to a fine but moderately strong cleavage (Laing, 1998).
Interpretation of the 2019 NTGS 200m spaced aeromagnetic survey data suggests that the SSZ extending from Hyperion to Crusade Deposits has experienced a higher degree of strain and deformation than interpreted by Laing, 1998 and has undergone regional N-S stretching (boudinaged) and oblique faulting due to repeated E-W oriented shortening/compression events. Later dextral fault offsets are interpreted to result from NE to NNE oriented compression. Recent Prodigy interpretation provides a simplified SSZ structural deformation sequence and is summarized in three stages starting with the initial orogeny.
The SSZ is interpreted in the area from gravity and magnetics and is associated with the existing near-by resources. The NW-trending ‘Old Eight Mile Fault’ splays off of the main N-trending Crusade – Tregony – Suplejack Fault/Corridor, on which Boco sits. It is interpreted that the older, favourable Mt Charles Formation has been structurally forced over the Killi Killi Formation, in places, by a series of faults and overturned folds
Project History
Tregony Deposit
Area was originally applied for by MJ Kidd in 1987 and has been worked on by Kidd in a joint venture with Messenger, Dominion Gold, Acacia Resources and AngloGold. Work carried out has included regional RAB sampling, and follow up RAB, RC and diamond drilling, which resulted in an initial definition of a 55,000-ounce gold resource..
The title was managed by Suplejack Pty Ltd (a wholly owned subsidiary of Ord River Resources) from 2008 until the decision was made to sell the project to Prodigy Gold in 2015. Prodigy Gold gained land access to the project in 2021.
Hyperion Deposit
From 1989 – 2000 Zapopan held the area, which now covers EL9250. During this period Zapopan completed first pass surface sampling and drilling.
Between 2001 and 2009, Otter Gold NL and the Newmont completed several phases of surface sampling, drilling and aeromagnetic surveys.
Newmont sold the project to Prodigy Gold in 2010, with Prodigy active on the tenement since that time.