Tanzania – ASX-listed Rift Valley Resources commenced drilling at its wholly owned Miyabi Gold Project in Tanzania.
The 26 hole reverse circulation (RC) drill programme commenced last week with drilling focused on a series of compelling targets, all defined by substantial drill intersections.
The work will include infill and extension drilling at the high grade Dalafuma prospect discovered by Rift Valley in 2011. This should enable a maiden mineral resource estimate to be prepared for the deposit.
Previous intersections at Dalafuma include:
- MBRC331 ‐ 18m at 12.0g/t from 46m
- MBRC349 ‐ 16m at 12.0g/t from 65m
- MBRC382 ‐ 28m at 6.8g/t from 16m
Other targets to be tested include Dalafuma Northwest, Chui and Contact Zone where previous Rift Valley RC drilling intersected strong zones of shallow resource grade gold mineralisation.
Previous intersections include:
- Dalafuma Northwest MBRC360 59m grading at 1.8g/t from 6m
- Chui Prospect MBRCD001 12m grading at 6.0g/t from 33m
- Contact Zone MBRC366 19m grading at 1.4g/t from 53m
The company said in a statement that each of these prospect areas have untested strike potential of >500m and have similar characteristics to the deposits making up the 520 000oz mineral resource at Miyabi.
“Having consolidated ownership of the Miyabi Project [in the March quarter subsequent to purchasing the remaining 50% of the project from its joint venture partner African Eagle Resources] we are pleased to be able to resume exploration at the project.
“Our previous work led to the discovery of the high grade Dalafuma prospect and a series of other resource targets. We expect that continued success will allow us to add substantially to the 520 000 oz resource base at Miyabi,” Rift Valley Resources MD Geoff Gilmour said.
The Miyabi gold project is located 200km south of Mwanza within the Lake Victoria Goldfields of Tanzania. It lies 50km east of Acacia Mining’s 4.5Moz Buzwagi gold mine, and 30km south of Resolute Mining’s 0.9Moz Nyakafuru project.
Rift Valley commenced work at the project in 2010 in joint venture with African Eagle Resources, subsequent to extensive exploration undertaken by African Eagle Resources in 2007 and 2008, which led to the discovery of a series of shallow gold deposits with a 520 000 oz mineral resource inventory.
Planned exploration programme
Rift Valley’s initial work program comprises 26 RC holes in four prospect areas.
The Dalafuma prospect was discovered by reconnaissance RAB drilling in 2012. It is now defined by a series of 50m to 100m spaced RC holes. The high grade mineralisation extends to within a few metres of surface and occurs within an anastomosing shear zone. Due to the variable dip of the mineralisation, a number of previous holes were not drilled deep enough to intersect the structure and therefore the mineralisation remains open at depth and to the east.
The program includes infill and extension drilling at the high grade Dalafuma deposit which remains open to the east and at depth.
The company says that if the Dalafuma holes intersect mineralisation as planned, it will allow a mineral resource estimate to be prepared for the prospect.
Strong mineralisation has been defined at the Dalafuma Northwest prospect and is interpreted to be developed within the same shear zone that hosts the 130 000 oz Kilimani deposit lying 800m to the east. The structure has been intersected in two Rift Valley holes which are interpreted to have been drilled down dip however the mineralised zone is interpreted to be approximately 40m wide. An historic hole drilled 200m further west is also interpreted to have intersected the same structure and returned resource grade mineralisation.
The program is planned to confirm geometry and define immediate extensions to the mineralisation.
A zone of high grade mineralisation has been intersected in RC drilling at the Chui prospect.
Two holes have been planned to clarify the geometry and test the dip extent of the high grade mineralisation.
Previous RC drilling by Rift Valley intersected strong gold mineralisation adjacent to the northern granite contact. This is the same structural setting as the 200 000 oz Faida deposit lying 500m to the west with very sparse drilling in between.
A series of holes has been planned to test the immediate extent of the defined mineralisation and to test for a possible trend linking to the Ngaya deposit to the southwest.
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