South Big Bell Project, Western Australia

  • The South Big Bell Project (E 20/900) is located 25km west of Cue in Western Australia.
  • It is located to the south of the Big Bell Gold Mine, currently held by Westgold Resources Ltd which forms part of their Central Murchison Gold Project.
  • The South Big Bell Project covers the southern extension of the Mount Magnet-Meekatharra Greenstone Belt.

South Big Bell Project Location

Tenement Location Map

Regional Geology

The tenement is located within the Archaean Mount Magnet-Meekatharra Greenstone belt and comprises the upper three greenstone formations of the Luke Creek Group as defined by Watkins and Hickman (1990):

  • Windaning Formation – Succession of abundant jaspalitic BIF and chert units interlayered with felsic volcanics, volcanoclastic, and volcanogenic rocks with minor basalts;
  • Gabanintha Formation – Bimodal succession of mafic and ultramafic rocks, felsic volcanic and volcanoclastic rocks, and sedimentary rocks; and
  • Golconda Formation – Succession of quartz-haematite BIF, interlayered with mafic and ultramafic extrusive and intrusive rocks.

The basal formation of the Luke Creek Group is the Murrouli Basalt, which is not exposed in the region. The Big Bell region is dominated by rocks of the Gabanintha Formation (2.97 to 3.05 Ga – Watkins and Hickman, 1990) and late-stage granite intrusives.

Shear parallel penetrative D3 fabrics dominate greenstone belts through the Murchison Province. These NNE trending structures are thought by Barnes (1996) to be representative of a change from E-W transgression to E-W compression, producing tight fold sets, dextral-strike, oblique-slip and ductile shears. Although generally obscured by D3, earlier deformation such as regional antiform/synform structures of the Meekatharra-Wydgee Greenstone Belt involved E-W compression producing thrusts and recumbent folds (D1), and N-S compression forming tight upright folds (D2) (Barnes , 1996). Late stage D4 structures include brittle-ductile shears and faults accompanied by and/or caused by granite plutons.

Tenement Geology

Geology

The South Big Bell tenement is located at the southern extension of the Mount Magnet-Meekatharra Greenstone Belt, informally referred to as the Big Bell Greenstone Belt, and forms the westerly limb of a large antiform structure. The belt has a strike length of 33 km and a maximum width at the Big Bell Mine of 1.5 km. The greenstone belt is comprised of variably altered NNE trending amphibolite and felsic schists. The greenstones narrow south of Big Bell. Outcropping occurs at the southern margin.

Tenement Magnetics