Update of the Plateau Project with further drill results

By January 25, 2018March 5th, 2018news

Papua Mining plc
(“Papua” or “the Company”)
Update of the Plateau Project with further drill results

The Board of Papua Mining (LON: PML), is pleased to update shareholders with further encouraging results from the recent drilling program at its 100%-owned Plateau Prospect in north Queensland, Australia.


  • Hole BPL008 – 10m @ 1.9g/t Au and 9g/t Ag (from 18m downhole) including 4m @ 3.65g/t Au and including 2m @ 5.8g/t Au. Additionally, 6m @ 13g/t Ag (from 21m downhole) was also intersected within a broader envelope of 43m @ 4g/t Ag. The same hole also intersected 24m @ 0.5% Zn from 25m downhole;
  • Hole BPL007 – 20m @ 0.50g/t Au (from 16m downhole) including 9m @ 0.9g/t Au. The same hole also intersected 43m @ 2g/t Ag (from surface) and 22m @ 0.4% Zn, also from surface;
  • Hole BPL006 – 20m @ 0.2% Cu (from surface) which represents a copper-enriched zone, 200m further east from all previous drilling. This broad zone of elevated copper in the eastern-most hole sits on the western edge of a surface copper geochemical anomaly which is continuous between Plateau and the Split Rock Prospect (2.5km north of Plateau). At Split Rock, which lies within the Lighthouse tenement, surface rock samples collected in 2011 returned up to 11.36% Cu, 3.5 g/t Au, 38.1 g/t Ag and 0.4% Co;
  • With consistently wide intervals of multi-element mineralisation being encountered at Plateau, the Company’s technical team is observing similarities to the operating Mt Wright Gold Mine (+1.5Moz gold), located 50km northeast of Plateau and believes another breccia complex similar to Mt Wright may exist at Plateau; and
  • Zn/Pb +/- Ag ratios at Plateau are similar to the upper levels of Mt Wright (surface down to 160m deep), indicating that the best developed gold mineralisation may potentially be deeper than the current level of drilling.

Chief Executive Officer of Papua Mining, David Price commented:

“Drilling results from this program have returned wide zones of mineralisation. The gold results including 22m @ 1.9g/t Au are very exciting, as are the broad elevated intervals of other elements. The recent intercepts of 43m @ 2.0g/t Ag and 16m @ 1.1% Zn and 20m @ 0.2% Cu add significantly to historical intercepts of 234m @ 2.5g/t Ag. We believe we are starting to see early signs of a significant project.

Management is very encouraged by this first drilling phase, which has increased the potential for the discovery of a large mineralised system. Plateau is in the vicinity of major gold deposits such as Mt Leyshon, Pajingo, Mt Wright and Ravenswood and we are excited about the similar geological, geochemical and geophysical charateristics we are seeing at Plateau.”

Reverse Circulation drilling undertaken in November and December 2017 has continued to return broad intercepts of gold and silver mineralisation at the Plateau Prospect within the Lighthouse Project, North Queensland. Results from the final 7 holes (BPL005 – BPL011) have been received from ALS Laboratories in Townsville.

As the Company’s’s knowledge of the Plateau Prospect increases through drilling, similarities to the operating Mt Wright Gold Mine (50km NE of Plateau) are being observed, which has historical resources of more than 1.5 million ounces. Importantly, the main lode mineralisation at Mt Wright was not intersected until 160m below surface with mineralisation extending down to 1,200m below surface.

Similarities observed are as follows;

  • hosted by Permo-Carboniferous breccia complexes with predominantly polymict breccia;
  • occur in close proximity to an intrusion of rhyolitic composition;
  • contain tuffisite pipes (a fine-grained, milled breccia)
  • approximately similar geometry and size
  • rhyolites comprise flow-banding and breccia phases.

A link is provided below showing the visual similarities between core drilled at Plateau in 2006 and core photographs from Mt Wright.

Next Steps:

  • Acquisition of available geophysical data and conducting new surveys where required, such as 3D Induced Polarisation (IP) and magnetics;
  • Continued interpretation and modelling of the new drilling data to build into planning for the next drilling phase; and
  • Mapping, sampling and structural analysis.

Discussion of Results:

Hole BPL005 was designed to drill through an interpreted fault zone and to definitively test an area where mineralisation was not anticipated. The hole intersected 2m @ 1.0g/t Au, 7.7g/t Ag and 1.0 % Zn from 139m downhole.

Drill hole BPL006 returned 20m @ 0.2% Cu from surface, which is the broadest elevated copper zone intersected to date at Plateau. This broad zone of elevated copper in the eastern-most hole sits on the western edge of a surface copper geochemical anomaly which is continuous between Plateau and Split Rock (2.5km north of Plateau). At Split Rock, which lies inside the Lighthouse tenement, historical surface rock samples collected in 2011 returned up to 11.36% Cu, 3.5 g/t Au, 38.1 g/t Ag and 0.4% Co.

Split Rock is a significant surface copper anomaly (2km x 1.5km), which represents another prospective target for Papua. This prospect will be included in an Induced Polarisation (IP) geophysical survey being planned. This survey will assist in determining if Plateau and Split Rock form part of a much larger mineralised system, which could potentially be connected at depth.

BPL007 and BPL008 were both drilled into the main line of mineralisation with the aim of filling gaps in the historical drilling pattern, close to surface. These holes have confirmed the validity of historical drilling results (from 30 years ago) and have also successfully filled gaps in the drilling density to assist in the aim of delivering a maiden mineral resource.

Two holes (BPL009 and BPL010) were designed as pure exploration holes and were drilled south of the main lode of mineralisation (250m and 650m respectively) with the aim of testing the prospectivity of regional structures. Hole BPL009 drill-tested a NE-striking, semi-regional fault which was barren of mineralisation, as was hole BPL010, which tested a remote, circular magnetic feature.

The final hole (BPL011) was a “scissor hole” drilled north of the main line of mineralisation to test for possible repetitions of mineralisation to the north and to drill back towards the mineralisation and parallel to the mineralisation to ensure holes were targetted in the correct orientation. BPL011 concluded that there is no repetition to the north and confirmed drilling orientation and additionally intersected 1m @ 1g/t Au at 244m downhole.


Drilling program details are provided in the table below which includes the rationale for each hole drilled.

Hole Number EAST (AGD94) NORTH (AGD94) RL (m) DEPTH (m) DIP (°) AZIMUTH
BPL001 459711 7740374 304 250 -60 040 Conceptual target only. Western margin of rhyolite.
BPL002 459841 7740315 312 200 -60 000 Southern margin of breccia. Strike extension.
BPL003 460099 7740435 327 200 -60 330 Conceptual target only. Eastern margin of rhyolite.
BPL004 460297 7740405 329 250 -60 350 South-dipping eastern zone. Depth extension.
BPL005 460425 7740410 316 250 -60 350 South-dipping eastern zone. Depth extension.
BPL006 460634 7740469 305 125 -60 350 Conceptual target only. Eastern step-out.
BPL007 460355 7740502 308 100 -60 350 Conceptual target only. Parallel zone to north.
BPL008 460246 7740511 328 106 -60 350 Conceptual target only. Parallel zone to north.
BPL009 459824 7740177 316 130 -60 330 Conceptual target only. Undrilled NE structures.
BPL010 459548 7739894 293 250 -60 135 Conceptual target only. Southern magnetic low.
BPL011 460221 7740601 326 250 -70 190 Conceptual target only. Southern margin of breccia.


Drilling results showing significant  intersections of gold, silver, zinc and copper for each hole drilled.

Papua Mining plc
Plateau Prospect, Queensland
Significant RC drilling results Nov/Dec 2017
Hole From To Interval Au Ag Zn Cu
Number (m) (m) (m) (g/t) (g/t) (%) (%)
BPL001 28 30 2 0.83 9.2
BPL002 39 61 22 1.86 22.3
BPL002 129 145 16 0.21 3.2 1.1
BPL003 32 95 63 2.3
BPL004 129 139 10 1.37 12.4
BPL005 139 141 2 1.00 7.7 1.0 0.2
BPL006 0 20 20 0.2
BPL007 16 36 20 0.50 2.5
BPL007 0 43 43 2.0
BPL007 0 22 22 0.4
BPL008 18 28 10 1.90 9.0
BPL008 25 49 24 0.5
BPL009 no significant assays
BPL010 no significant assays
BPL011 244 245 1 1.00


Competent Person Statement:

Information in this announcement that relates to exploration results is based on information compiled by Mr David Price, a Director of Papua Mining plc, who is a Fellow of the Australasian Institute of Mining and Metallurgy (FAusIMM). Mr Price has sufficient experience relevant to the style of mineralisation and type of deposit under consideration and to the activity which has been undertaken to qualify as a Competent Person as defined by the 2012 Edition of the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore Reserves (the JORC Code) and under the AIM Rules – Note for Mining and Oil & Gas Companies. Mr Price consents to the inclusion in the announcement of the matters based on their information in the form and context in which it appears.

In quoting exploration targets, the potential quantity and grade is conceptual in nature. There has been insufficient exploration to estimate a Mineral Resource and it is uncertain if further exploration will result in the estimation of a Mineral Resource.

For further information on the Company please visit www.rockfireresources.com or contact the following:

Papua Mining plc

David Price, Chief Executive Officer

Cenkos Securities plc

Nominated Adviser & Broker,

Derrick Lee/Beth McKiernan




+44 131 220 6939


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