Jamieson Project (Au-Cu-Ag-Zn)

The Jamieson Project is located near the township of Jamieson in the central Victorian Goldfields and comprises granted exploration licence 5523 (EL5523), containing the Hill 800 gold and Rhyolite Creek zinc-gold-silver prospects within its 34 km2 area. In June 2017, the Company entered into the Jamieson Agreement to earn an interest of 100% in the Jamieson Project.

Hill 800 was discovered by New Holland Mining NL (New Holland) in 1994, following sampling of outcropping gold-rich gossans.  The prospect is a volcanic-hosted massive sulphide (VHMS) gold-copper (Au-Cu) system with similar host rock, age and mineralisation style to the 1.5Moz Henty gold deposit, and Hellyer lead-zinc-silver-gold deposits in Western Tasmania.

Quartz carbonate sulphide breccia
Quartz-carbonate-sulphide breccia from 34.5m in drill hole HED1 (half-HQ core)

New Holland drilled 51 reverse circulation (RC) and 6 diamond holes at Hill 800 (6,309m total) between 1996 and 1999, returning significant gold results as shown in the figure below, including:

  • 33m @ 4.31g/t Au, from surface (HEC1)
  • 13m @ 10.9g/t Au, from surface (HEC13), including 3m @ 38.8 g/t Au from surface
  • 4m @ 4.56g/t Au, from 0.5m (HED1)
  • 25m @ 4.72g/t Au, from 3m (HEC45), including 1m @ 24.0g/t Au from 16m
  • 21m @ 4.04g/t Au, from 76m (HEC49), including 1m @ 20.9g/t Au from 80m
  • 4m @ 7.03g/t Au, from 91m (HEC12), including 1m @ 28.9g/t Au from 184m and 1m @ 122g/t Au from 188m.
  • (down hole widths may not represent true thickness, a complete listing of significant intervals is included in the Carawine Prospectus.)

CARAWINE Jamieson Hill800 Longsection
Hill 800 Long section

Gold mineralisation is associated with silica-sericite-pyrite alteration in intermediate volcanic rocks at the core of a well-defined alteration zonation plunging approximately 70 degrees to the north.  Within this zone, higher gold grades occur in a main, sub-vertical lode, and two parallel mineralised trends in the footwall to the main lode.

The effectiveness of prior drilling was restricted by limited site preparation and the use of large truck-mounted drill rigs, leading to a number of oblique intersections and holes missing mineralisation.  Carawine believes the use of small diamond drill rigs and better drill site preparation presents an opportunity for Carawine to more effectively test the interpreted lode geometry and target down-plunge extensions and potential parallel lodes, with the objective of compiling sufficient information to eventually allow estimation of an updated Mineral Resource for the deposit.

The Rhyolite Creek Prospect, located about 5km south of Hill 800, was discovered by previous explorer Goldsearch, in 2008.  Diamond hole RCD001, targeting a linear magnetic anomaly in an area of gold-silver-base metal anomalism in surface geochemical samples, intersected a zone of strong albite-chlorite-silica alteration and sulphide mineralisation, returning an interval of:

  • 8m @ 3.7% Zn, 0.3% Pb, 0.1% Cu, 1.6g/t Au and 29g/t Ag from 220m including 1.4m @ 15.6% Zn, 1.5% Pb, 0.5% Cu, 7.4g/t Au and 113g/t Ag from 223m

The mineralisation was identified as being related to low-iron sphalerite and the footwall to this high-grade zone was reported as being strongly altered intermediate volcanics, with significantly elevated zinc values. The Company believes the high-grade zinc-gold-silver horizon intersected in RCD001 is potentially associated with a VHMS seafloor or sub-seafloor deposit, occurring at the contact of intermediate and felsic volcanic sequences, with wide zones of footwall alteration and anomalism. Additional holes drilled by previous explorers has intersected this position over a strike length of about 400m, remaining open along strike.

The discovery to date of two VHMS-style systems on the tenement confirms the outstanding potential of the Jamieson Project. Typically, deposits of this style occur in clusters often defining significant mining camps. Gold-rich VHMS deposits are particularly attractive given their high-grade and polymetallic nature. The Jamieson Project area is considered to be under-explored, with limited systematic exploration for VHMS deposits completed to date, representing an excellent opportunity for Carawine to realise the potential of the area.

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