Zenith Minerals (ASX:ZNC) has acquired the remaining 49% of the Develin Creek Copper-Zinc-Gold-Silver Project in Queensland. Develin Creek, which contains a JORC-2012 Inferred Resource of 2.57Mt at 2.62% CuEq, is a massive sulphide project similar in geology to DeGrussa and Jaguar-Bentley. The remaining interest was acquired for $60k from 4DS Memory Limited, a former explorer now tech company.
- Zenith has executed a binding agreement with its joint venture partner 4DS Memory Limited to acquire 4DS Memory Limited’s 49% interest in the Develin Creek copper-zinc-gold-silver project located in Queensland;
- Develin Creek contains an Inferred Mineral Resource (JORC 2012) of: 2.57Mt @ 1.76% copper, 2.01% zinc, 0.24g/t gold and 9.6g/t silver (2.62% CuEq) released to ASX on the 15th February 2015.
- Mineralisation remains open at all 3 massive sulphide deposits, with upside to resource grades with Zenith RC hole twinning previous 1993 percussion hole returning significantly higher copper, zinc, gold and silver grades (300% to 700% higher);
- Initial metallurgical testwork results on the copper-zinc massive sulphides show positive first stage “rougher” recoveries of 90%;
- Ongoing program to expand geochemical coverage over priority host rock horizons within the highly prospective tenure extending for up to 50km north – south surrounding the Develin Creek deposits; and
- Drill testing planned of Wilsons South target and Sulphide City twin hole drilling program to test historic drilling assay under-call and provide further metallurgical samples.
Zenith Minerals Limited (“Zenith” or “the Company”) is pleased to advise that it has executed a binding agreement to acquire the remaining 49% interest in the Develin Creek copper-zinc-gold-silver project located in Queensland for $A60,000.
As foreshadowed in the Company’s June 2016 Quarterly Report, the acquisition of 4DS’s 49% interest is the result of negotiations following the election by 4DS not to exercise a buy back option, leaving the Parties to continue in a 51/49 contributing JV. 4DS Memory Limited (ASX:4DS) (formerly named Fitzroy Resources Limited (ASX:FRY)), changed its principal business activities and company name, effective 14 December 2015, following its agreement to acquire a Silicon Valley based memory developer.
Having now secured a 100% interest in the Develin Creek project, the Company plans further exploration activities to unlock the potential of the existing Inferred Mineral Resource (JORC 2012) of: 2.57Mt @ 1.76% copper, 2.01% zinc, 0.24g/t gold and 9.6g/t silver (2.62% CuEq) released to ASX on the 15th February 2015, and the highly prospective surrounding tenure. Drill testing is planned of the new Wilsons South target and at Sulphide City where a twin hole drilling program will test historic drilling assay under-call and provide further metallurgical samples. In addition the program to expand geochemical coverage over priority host rock horizons within the highly prospective tenure surrounding the Develin Creek deposits remains ongoing.
Background on Develin Creek Project
Located 80km north‐west of Rockhampton in Central Queensland, the Develin Creek base metals project hosts several copper-zinc-gold-silver volcanic hosted massive sulphide deposits and covers an extensive belt of underexplored prospective host rocks. Mineralisation comprises massive sulphide, stringer and breccia style copper-zinc-gold-silver deposits, hosted by basalts. The Develin Creek deposits are of a style similar to those currently being mined by Sandfire Resources NL at DeGrussa and Independence Group NL at Jaguar-Bentley, which are both located in Western Australia. These types of deposits typically occur in clusters making them attractive exploration targets. On the 15th February 2015 the Company announced a new mineral resource of: 2.57Mt @ 1.76% copper, 2.01% zinc, 0.24g/t gold and 9.6g/t silver (2.62% CuEq).
The resource is classified under the JORC Code 2012 as Inferred, based on several criteria including drill spacing, continuity of mineralisation, wireframe geometry and confidence in assays from various drilling campaigns. *CuEq refer to JORC Code Reporting Criteria Section 2, ASX Release 15th Feb 2015.
The resource update followed a successful resource extension drilling campaign (ASX Release 26th Nov 2014) that confirmed the high-grade core of the Sulphide City deposit (Figure 1) extends a further 140m south of the previous resource whilst the thick sub-horizontal copper zone at Window was extended to the north of existing drilling. New results from holes in that drill campaign at Sulphide City included: 5m @ 2.45% copper, 2.14% zinc, 0.4 g/t gold and 30.7 g/t silver and 3m @ 2.63% copper, 0.88% zinc, 0.5 g/t gold and 36.7 g/t silver supporting results from a diamond drill hole completed in 2011 that returned an intersection of 13.2 metres @ 3.3% copper, 4.0% zinc and 0.4g/t gold.
Massive bedded copper-zinc sulphide mineralisation remains open at depth beyond the main Scorpion deposit to the north and north-east, whilst bedded massive sulphide remain open ended to the north west of the Sulphide City deposit (Figure 2). Incremental resource extensions are likely to the immediate north of the Window resource.
In addition a Zenith RC hole completed in the drill program twinned a 1993 percussion drill hole as the older hole appeared to have anomalously low results compared to the more recent diamond drill holes and other older 1993 diamond drill hole results further to the north. Zenith’s new hole returned significantly higher copper, zinc, gold and silver grades (3x copper, 5x zinc, 5x gold and 7x silver) for the equivalent drilled interval. Results from the newer twin hole replaced the older drill hole results allowing a zone of continuous high-grade copper to be defined through the core of the Sulphide City deposit.
The Sulphide City mineralisation consists of stockwork, disseminated and massive sulphide mineralisation. The main Sulphide City lens, outlined with a 1% copper equivalent cut‐off, has a horizontal projection of about 400m x 150m. The lens varies from 2.5m to 29m in thickness, generally dips 25‐30° west‐northwest and has been intersected at depths between 80m and 200m. Better historic drill intersections (previously reported) include:
- DDH-016 14.5m @ 0.6% Cu and 4.3% Zn (includes 2.5m @ 12.0% Zn)
- DDH-044 11.3m @ 2.1% Cu, 5.9% Zn, 16g/t Ag & 1.21g/t Au
- PD-052 15.0m @ 3.1% Cu, 2.3% Zn
The Scorpion deposit, 500m south-west of the Sulphide City deposit occurs in a 400m x 200m zone in altered volcanic rocks. The sulphide body, 2.5m – 9.5m thick consists of brecciated massive sulphides and grades up to 6% Cu, 9% Zn, 43g/t Ag and 1g/t Au. Better historic drill results (previously reported) include:
- DDH-001 21.6m @ 2.5% Cu, 1.5% Zn, 13g/t Ag & 0.5g/t Au (includes 16.2m @ 3.2% Cu, 1.6% Zn)
- DDH-002 31.6m @ 1.5% Cu, 1.5% Zn, 15g/t Ag & 0.3g/t Au (includes 16.7m @ 2.1% Cu, 2.0% Zn)
- PD-007 44.0m @ 1.6% Cu, 1.0% Zn, 8g/t Ag & 0.3g/t Au (includes 25.0m @ 2.6% Cu, 1.2% Zn)
The highly weathered Window mineralisation consists of a ~40m thick sub-horizontal supergene blanket of copper mineralisation at 50m depth within a wider zone of stringer style mineralisation. The location and style of mineralisation indicates that the Window Deposit may be the partially eroded footwall stringer zone to the nearby Scorpion massive sulphide lenses. Better historic drilling results from Window (previously reported) include:
- PD-012 84.0m @ 0.8% Cu (includes 48.0m @ 1.2%)
Wilsons South Prospect
In the Wilsons area, located 30km south of the known Develin Creek copper-zinc-gold-silver deposits Zenith’s geochemical sampling program defined a 1000 metre by 500 metre, coincident copper-zinc soil anomaly overlying the Wilsons Copper Prospect where samples of gossans (up to 2.7% copper and 0.4% zinc) were mapped. Based on mapping and historical drilling Zenith’s geologists interpret the Wilsons Prospect to represent the footwall stringer or feeder position typically observed below copper-zinc massive sulphide bodies.
In addition to identifying the known prospect at Wilsons, the soil sampling defined a prospective corridor 2000 metres by 750 metres continuing to the south which overlies a discrete EM conductor defined by a HeliTEM geophysical survey. The coincident soil anomaly and EM conductor at Wilsons South are located at higher topographic elevations directly along geological strike from the Wilsons prospect and are therefore considered to be an attractive drill target as preservation of the copperzinc massive sulphide bodies are considered likely.
Within the Develin Creek project area, Zenith believes that there is good potential to discover new massive sulphide copper-zinc mineralisation, in the extensive landholdings totalling 300km2 . Zenith controls over 50km of strike length of prospective volcanic host rock sequence.
To date approximately 11,100 soil samples have been collected and analysed by Zenith as part of a systematic geochemical surveying program. Historically there has been little to no systematic geochemical soil sampling over much of the prospective target horizons, and thus the Zenith program was the first to provide effective regional geochemical coverage over key portions of the target area.