LCT Holdings Inc’s Big Bulk claims cover most of the Big Bulk Au/Cu porphyry system, and are particularly highly mineralised in gold.
After mapping the Big Bulk claims in 2017, Gayle Febbo, 2015 author of “Geology of the Mitchell Au-Cu-Ag-Mo porphyry deposit, northwestern British Columbia” wrote in her 2017 Assessment Report on the Big Bulk claims:
“Historic work has assumed that the Big Bulk porphyry system was an upright and a lower tonnage alkalic porphyry system. New interpretations indicate that the system is tilted with a surface expression of over 3.5 Km. Given the dimensions of the system as well as the dioritic host rocks, Orevista geologists believe the target is a much larger calc-alkaline porphyry system. Given that the porphyry system is tilted on its side, deeper core zone alteration and mineralization normally only tested with deep drilling is present at surface.” [Page 26 of the Assessment Report]
Visible gold on surface at the Brianne Zone of Big Bulk. Click to see more related photos.
Drill pad at Big Bulk in 2003. Borehole BB03-02 yielded 21m @0.86% Cu and 0.64 g/t Au (from 12m to 33m) and bottomed at 195m with 54m @ 0.33% Cu and 0.21 g/t Au. Mineralisation in this hole was therefore open at depth. Click here to view 2019 3D re-modeling of Big Bulk based on 2018 mapping, including drill-targeting. Click the image to view a 2015 video presenting the previous modelling and still-relevant epithermal gold drill target at Big Bulk. The video includes 3D animations of both porphyry and epithermal gold targets.
Click on the map above to watch a short YouTube video of a helicopter flight from south of the Midnight Blue Au/Cu prospect over the ice-covered massif to Big Bulk. An area at least 5km by 5km is mineralised in Au and Cu by what appear to be multiple intrusive events.
Click here for a short video from a helicopter flying past the Big Bulk visible gold showing in 2008. Approach to Kinskuch Lake on this occasion was from the southwest.
Gold in surface samples over the Big Bulk porphyry system collected in 2008. Click to enlarge
Copper in surface samples over the Big Bulk porphyry system collected in 2008. Click to enlarge.
Outcrop geology in the central portion of the Big Bulk porphyry system, as mapped by Teck in 2002. Click to enlarge.
Historical drilling at Big Bulk. With the typical footprint of an economic alkalic Au/Cu porphyry being ~300m x 300m, most of the high surface gold areas remain to be drill-tested, both for porphyry and epithermal gold mineralisation. Click to enlarge.
Geological map of the larger Big Bulk system produced by Teck Corporation in 2002, including alteration boundaries and Teck’s surface gold sampling results. Click to enlarge.
Click on the graphic above to view Big Bulk geology and rock sampling data in an online interactive map (functions best on a normal-sized computer screen).
Please click on this picture to read a short note on how horizontal extraction access would be feasible to a number of porphyry target areas around Big Bulk.
Logging and sampling core in the AngloGold Big Bulk core shed/office in 2009. Click on the image to browse photos showing fieldwork on Big Bulk from 2003 to 2009.
Below is a list of links to reports on the Big Bulk Au/Cu porphyry system:
2002: Teck Cominco report on work carried out in 2001
2003: Teck Cominco report on work carried out in 2002
2003: Canadian Empire report on work carried out in 2003 (not previously made public)
2009: Report by Dr. Andre Panteleyev on drill core from Big Bulk
2009: Durango Resource Corp report on work carried out in 2008
2010: Target Geological Inc report on work carried out in 2009 for AngloGold
2015: LCT Holdings Inc. Assessment report on geological and geochemical sampling carried out over Big Bulk.
2017: OK2 Metals Assessment Report on ZTEM survey, geological mapping and geochemical sampling carried out over Big Bulk.
Please contact Clinton Smyth if you are interested in receiving more information about the LCT Big Bulk and/or Kinskuch properties.