The Marymia Greenstone Belt is approximately 60km long by 10km wide, but its potential to host significant gold mineralisation was unrecognised until the time of the first gold discovery at Plutonic Well in 1987.
Open pit mining at what is now known as the Plutonic Gold Mine commenced in 1990 and by 1995 both underground and open cut mines were in operation.
In 1988 and 1990, the K1 and K2 deposits were discovered in the Marymia area along the northern part of the belt. This was followed by the Marwest, Mareast, Triple P, Pelican, Albatross and Flamingo discoveries in 1992 located in the central area of the belt.
These deposits make up areas that the company currently holds all the tenements. Following a period of ownership consolidation between 1998 and 2001, the entire greenstone belt fell under the control of Barrick.
Since mining commenced in 1990, approximately 4.7 million ounces of gold has been produced from 57 open pits (including cut-backs) and four underground mines within the Marymia greenstone belt.
The Marymia Gold Project lies within the Plutonic Well gneiss-granite greenstone belt located along the northern margin of the Yilgarn Craton. It covers the majority of the Marymia-Plutonic greenstone belt and a portion of the smaller Baumgarten greenstone belt to the east.
Previous production from within the Tenements is estimated at 580,000 ounces of gold from 40 open pits. Most of this production was from the K1/K1SE (62,000 ounces of gold), K2 (134,000 ounces of gold), Triple P (95,000 ounces of gold) and Marwest (46,000 ounces of gold) deposits.
Previous explorers have completed extensive, albeit largely shallow exploration over the Plutonic – Marymia greenstone belt.
Significant geochemical anomalies lack meaningful drill testing particularly in areas adjacent to and between the former open pits.
A mineral resource update for the Trident Gold Deposit was completed during July 2012 by Runge Limited for Dampier Gold Limited (DAU). The update was a result of an additional 29 holes drilled by DAU in 2011.
On its inception, Vango Mining Limited (VAN) believed that in addition to the known reserves and resources, there are also significant greenfields and brownfields exploration opportunities within the greenstone belt.
100% ownership of tenements
In August 2016, the Board of Directors of VAN were pleased to announce the Company's acquisition of the tenements from DAU.
VAN's effective 100 percent ownership of those tenements provided it with an asset which its Directors believe will be of enhanced attractiveness to financiers and investors and will put VAN in a position where it can more easily obtain the funds needed to develop the Plutonic Dome Project.
In mid 1997, VAN received its first assay results from its drilling programme at the Trident Gold Deposit.
The results delivered outstanding high-grade intersections which confirmed Trident as a significant, very high-grade gold development opportunity.
The following year, VAN received further high-grade results from the Trident Gold Deposit.
In August 2018, the Company announced that metallurgical leach recovery increased up to 90 percent gold extraction for Trident.
The successful metallurgical programme demonstrates the potential for ore from the Trident deposit to deliver relatively low milling costs for the Company's proposed stand-alone processing plant at the 100 percent-owned Marymia Gold Project.