LCL’s Colombian gold project continues to exceed expectations

4 minute read

By Jonathan Jackson. Published at May 28, 2021, in Mining

It seems that with every drill hole Los Cerros (ASX:LCL) targets, it is one step closer to evolving its 100% owned Quinchia Gold Project in Colombia into a multi-million ounce project.

The Quinchia Gold Project hosts the Miraflores Gold Deposit with a Resource of 877,000 Au ounces at 2.80g/t Au and Reserve of 457,000 Au ounces at 3.29g/t Au.

Within 3km of Miraflores is the Tesorito near surface porphyry and the Chuscal porphyry target.

These two targets are the focus of LCL’s announcement today.

LCL has delivered ongoing exploration success at Tesorito and this shows no signs of slowing down.

Tesorito continues to grow

LCL has today announced results from step out drilling at Tesorito South, where the dimensions of the Tesorito South porphyry continues to grow.

All recent Tesorito results have remained within mineralisation, this means the system remains open in directions tested. This also bodes well for the scale of the project as it continues to expand.

Following are the latest drilling results of intercepted zones of higher-grade gold within a broad zone of near surface mineralisation.

Results (uncut) include:

  • 176.8m @ 1.02g/t Au from surface in TS-DH18 including 54m @ 1.61g/t Au from surface and 40m @ 1.67g/t Au from 112m
  • 209m @ 1.01g/t Au from surface in TS-DH19 including 102m @ 1.33g/t Au from surface
  • 310m @ 0.74g/t Au from surface in TS-DH22 including 10m @ 1.37g/t Au from 4m and 40m @ 1.1g/t Au from 128m
  • 367.95m @ 0.57g/t Au from surface in TS-DH23 including 24m @ 0.99g

“The near surface higher grade gold intercepts of holes 18 and 19 suggest the higher grade core of the porphyry system reaches surface to the east of this pad, an area we are currently drilling,” Los Cerros Managing Director, Jason Stirbinskis said.

“It is becoming more apparent, with every drill hole that grows the potential scale of Tesorito, that our Quinchia Gold Project has great potential to evolve into a multi-million ounce gold project, like many of its neighbours.

“We already have over 1.3Moz of JORC Resources defined, before we consider what we may be able to delineate in the Tesorito South area and at other earlier stage prospects.”

Tesorito South drill holes mentioned today are part of a larger campaign focused on expanding the lateral dimensions of modelled gold envelopes to the south and north, including higher grade sub-zones that show remarkable consistency and persistence across much of the drilling campaign.

Of most note in TS-DH18 and TS-DH19 is the at-surface higher grade 1.5-2g/t gold zone interpreted to be the same higher grade zone encountered to the west at 72m downhole in TS-DH17 (52.3m @ 2.1g/t Au from 72m) which is consistent with the modelled westerly plunge of the porphyry system.

Meanwhile, the higher grade gold intersection in TS-DH22 expands Tesorito South mineralisation northeast towards Tesorito North revealing a 200+m zone of untested near surface potential between the two prospects (see below).

Tesorito plan view showing modelled gold envelopes and major controlling structures (faults). Drill trace labels in white are the subject of this release, drill trace labels in italics are planned holes.
Tesorito plan view showing modelled gold envelopes and major controlling structures (faults). Drill trace labels in white are the subject of this release, drill trace labels in italics are planned holes.
Cross Section A-B (looking west) showing Tesorito South modelled gold envelopes in relation to Tesorito North and Tesorito West targets.
Cross Section A-B (looking west) showing Tesorito South modelled gold envelopes in relation to Tesorito North and Tesorito West targets.

If further shallow gold of ~1g/t Au can be delineated in this zone, it has potential to have substantial positive outcomes for future mining economics of the Quinchia Gold Project.

LCL’s attention is currently on testing for eastern extensions of Tesorito South mineralisation with a series of drill holes. It will then move its focus to the western region of Tesorito South, with the likelihood of extending drill holes at depth into the region of Tesorito West.

“The Company has previously announced plans for deep penetrating IP geophysics which will begin shortly. It is expected this program will provide critical additional information for drilling both the western area of the Tesorito South porphyry (Tesorito West) and Tesorito North,” Stirbinskis said.

Confidence remains for Chuscal

Drilling at the Chuscal East porphyry target intercepted units of the targeted porphyry suite, including magmatic breccia and diorites recording a 32m wide zone of particular interest.

Holes CHDDH12 and CHDDH13 tested the Chuscal East porphyry target zone.

The previously reported visual logging of CHDDH12 intersected a suite of diorite, porphyritic diorite plus a 164m wide zone of magmatic breccia interpreted to represent elements of an underlying causative porphyry partly responsible for the significant extent of the Chuscal gold in soil anomaly.

Hole CHDDH13 was sited to test ~200m below the CHDDH12 zone of interest.

Whilst most of the core of both holes delivered extensive, but marginally elevated gold values, a 32m wide zone capturing a central diorite surrounded by magmatic breccia produced the following intercept in CHDDH13:

  • 32m @ 1.64g/t Au from 404m
Chuscal plan view and drill program to date.
Chuscal plan view and drill program to date.

“We remain confident that we are edging closer to the core of an underlying causative porphyry at Chuscal East and we are yet to test the Chuscal West porphyry target,” Stirbinskis commented:

“The Chuscal rig is drilling at the Ceibal porphyry target currently and it is intended to return to drilling Chuscal after the completion of pending regional geophysics which should assist in targeting.”

To read more about LCL: Los Cerros Overview


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