RE: Yes28 Jun 2021 11:21
https://www.lse.co.uk/rns/ROCK/magnetics-doubles-copper-target-at-copperhead-4trms3azztd61my.html
Rockfire Resources plc
("Rockfire" or the "Company")Magnetics doubles copper target at Copperhead
Rockfire Resources plc (LON: ROCK), the gold and base metal exploration company, is pleased to announce that the Company's recent helicopter geophysical survey has doubled the footprint of potential copper mineralisation at its 100%-owned Copperhead porphyry project in North Queensland, Australia ("Copperhead").
Highlights:
· A helicopter magnetic survey completed in December 2020 has doubled the copper target area at Copperhead.
· The copper target is now defined by a minimum area of 5 km east-west x 3 km north-south.
· Faults and fractures are clearly defined and correlate well with known copper mineralisation already discovered in streams, soils, and drilling completed by Carpentaria Exploration in 1972.
· The drilling in 1972 tested an area less than 0.6% of the expanded target area.
· The Copperhead target remains open in all directions.
https://www.lse.co.uk/rns/ROCK/3d-processing-pinpoints-drilling-targets-wu7r4o3yg64keji.html
Rockfire Resources plc (LON: ROCK), the gold and base metal exploration company, is pleased to announce results from 3D processing of helicopter magnetic data at the Company's 100%-owned Copper Dome porphyry project ("Copper Dome") in North Queensland, Australia. The original survey was flown in April 2021 and the newly processed data highlights strongly magnetic drilling targets at depth.
Highlights:
· Two main targets have been highlighted, with both showing very strong magnetic responses, which are being interpreted as magnetite alteration - an important feature associated with many porphyry copper deposits.
· The targets commence approximately 500 m below surface.
· The larger target is 1.5 km long, 700 m wide and occurs between 400 m and 1.3 km deep and remains open beyond that depth.
· The smaller target is 900 m long, 250 m wide and occurs between 600 m and at least 1 km deep.
· Historical diamond drilling from 1972, directly above the targets, intersected typical porphyry grades including 88 m @ 0.23% Cu and 75 m @ 0.13% Cu, with most holes ending in copper mineralisation. Peak values from core sampling were 3.77% Cu and 1.8 g/t Au.
· Alteration identified in core is primarily sericite/pyrite (+/- silica) phyllic alteration, suggesting that the current surface is at the upper-mid levels of a copper/gold porphyry system.
· Sulphides in core range from 3-15% pyrite, with associated chalcopyrite. Fluids are recorded in geological logs as being focussed within porphyritic intrusions and breccias.
· Rockfire is preparing for drilling initially at the Copperhead porphyry copper project and intends to drill these new magnetic anomalies at Copper Dome also during this field season.
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