Enterprise’s Doolgunna Project covers over 60km of strike of the southern boundary of the Bryah Basin and the northern part of the Yerrida Basin. The southern Bryah Basin contains the Karalundi Formation which hosts the DeGrussa and Monty copper-gold deposits.
Sandfire Resources NL (ASX: SFR) entered into a farm-in agreement with Enterprise Metals in October 2016 to earn up to a 75% interest in Enterprise’s Doolgunna Project by sole funding exploration on the tenements to define a JORC (2012) compliant mineral resource of at least 50,000 tonnes of contained copper or copper equivalent. Sandfire have been operating and wholly funding exploration on the project area over the past 3 years, and have undertaken extensive airborne surveys, aircore (AC), reverse circulation (RC) and diamond core (DC) drilling programs.
During the 12 months ended 30 June 2019, Sandfire conducted very significant aircore (46,000m), and reverse circulation (10,250m) drilling programs, plus a high-resolution gravity survey and a large Moving Loop Electromagnetic (MLEM) survey on the Enterprise Farm-in tenements. The MLEM survey was undertaken to extend the existing MLEM survey from the Vulcan prospect south west along the Karalundi trend.
The aircore and reverse circulation drilling was focussed on testing the sediments and dolerite of the Karalundi Formation, the host sequence to DeGrussa deposit and the Monty deposit. No ore grade assays were received from the aircore and reverse circulation drilling programs during the period ending 30 June 2019.
The regional, high resolution (50 x 100m stations) ground gravity survey was completed along the Karalundi Trend, beginning at Vulcan and traversing to the south west. The survey was designed to see through paleochannel material where magnetic signatures have been muted with deep drainage and identify detailed bedrock lithologies and structures. The data is successfully achieving its goal of mapping the stratigraphy beneath variable cover.