THE MARYMIA EAST
Norwest’s Marymia East Project is the combination of Norwest’s 2 x Bulgera tenements (100%) and 2 x Marymia tenements (~81%). These tenements cover a ground position of 266km² and comprise numerous walk-up drill targets having significant gold mineralisation potential.
The Bulgera Area comprises two granted exploration licences, E52/3316 and E52/3276, covering 36.8km² over the northeast end of the Plutonic Well Greenstone Belt, 200km northeast of Meekatharra. The project is located 20km northeast of Vango Mining’s Marymia gold project and 48km via existing haul road from the operating Plutonic gold mine which has produced over 5.5 million ounces of gold since 1990. The Plutonic mine is owned by Toronto listed Superior Gold Inc. (TSX-V: SGI).
The Bulgera area contains four shallow open pits that have undergone two phases of mining between 1996 and 1998 and again between 2003 and 2004. Mining of the four pits being Bulgera, Mercuri, Venus and Price produced a reported 440,799 tonnes of ore @ 1.65 g/t Au for 23,398 ounces. The ore was treated at the Marymia mining centre during the first phase and the Plutonic processing facility during the second phase.
The Bulgera greenstone package has been interpreted as a faulted extension of the Marymia mine sequence across a system of curved thrusts where Marymia and Bulgera are offset. This is supported by the similarity in lithologies between the deposits and the magnetics which show the drag of the Bulgera trends into the interpreted fault structures1.
The resource was upgraded in April 2020 following Norwest’s maiden 46-hole, 5,840 metre RC resource drilling programme completed 17 December 2019. The current JORC compliant gold resources at Bulgera are shown below.
Indicated = 2.06Mt grading 1.0 g/t for 66,230 ounces of gold
Inferred = 0.86Mt grading 1.0 g/t for 27,650 ounces of gold
Total = 2.92MT grading 1.0g/t for 93,880 ounces of gold
RC drilling below the main Bulgera pits
RC drill testing will target zones below 100 vertical metres to intercept gold mineralisation extending down-dip from the shallow Bulgera and Mercuri pits. The large amount of drilling undertaken to the west along the mafic-ultramafic mine sequence by Vango clearly shows the highest-grade gold mineralisation resides below 100 vertical metres.
The Plutonic Well geology showing the mafic-ultramafic mine sequence (primary gold host)
running along the northwest edge in contact with the granites.
Vango has aggressively drilled the mine sequence below 100 vertical metres over the past 4 years and reported numerous high-grade gold intercepts. In June 2020 Vango announced a 1 million-ounce gold resource. At Bulgera there has been very little drilling below 100 vertical metres. The Norwest RC drilling programme is designed to test the potential for gold mineralisation extending below the shallow Mercuri and Bulgera pits to depths beyond 100 vertical metres.
Schematic composite section of target areas for RC drilling to test for gold mineralization extending below Bulgera pits.
Drill testing along the Northern Granite contact
During the past few years Vango has announced significant gold intersection related to resources located along their granite-mine sequence contact1. These include their highest-grade areas located along the Trident and PHB gold ‘Corridors’. The bulk of the high-grade gold is intersected at or below 100 metres and in the case of PHB Corridor, below a thick leached zone where no surface gold mineralisation was detected. Most of these gold deposits and prospects appear to have been identified using RC and/or RAB drilling.
At Bulgera there has been no drill testing for gold mineralisation directed along its equivalent of the granite-mine sequence contact. Recently located structural interpretations from AMAG Data show first and second order mineralisation structures extending through the Bulgera pit area and across the Granite contact. Norwest has planned both RC and aircore drilling along the granite contact to test for PHB and Trident style gold mineralisation.
The Bulgera mine sequence-granite contact crossed by interpreted mineralised structures.
Bulgera Area drilling plan targeting gold mineralisation at depth and along granite contact.
The Marymia Area (80%) is in joint venture with Reidel Resources Limited (20%) and comprises two granted exploration tenements covering a total area of 230 square kilometres. The project is situated 40 kilometres east of the Plutonic Gold Mine, 20 kilometres southeast of the Marymia gold camp, and 55 kilometres northeast of Sandfire Resources NL’s DeGrussa copper mine.
The Ned’s Creek Gold Project Extension
In 2018, Lodestar Minerals (ASX: LSR) (‘Lodestar’) announced an intersection of 4m grading 74g/t gold from diamond drilling at its Ned’s Creek, Contessa gold prospect2. Their drilling has continued to intersect significant gold mineralisation at Contessa as well as other nearby prospects with all mineralisation focused along the ‘Contessa Granite contact’. The best gold intercepts are also below 100 vertical metres. Vango Mining have a JV Agreement with Lodestar to spend $5 million over 3 year to earn 51% of the Ned’s Creek project.
Norwest’s Marymia tenements abut the Ned’s Creek project area. The Contessa Granite contact extends ~10km along an untested area within Norwest’s Marymia ground holdings. Aircore drilling to test where the Contessa granite contact extends into the Marymia ground is scheduled to commence in early 2021.
Ned’s Creek with the Contessa Granite extending through untested Norwest ground.