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Rumble Resources Limited (ASX: RTR) (“Rumble” or “the Company”) is pleased to announce the discovery of high- grade tungsten from diamond core drilling at the Western Queen South deposit. Systematic pXRF analysis of drill hole WQDD013 led to ultraviolet scanning which highlighted very significant zones of scheelite. Wet analysis of the main visible scheelite zone has confirmed the discovery as very high-grade tungsten skarn style mineralisation.
Highlights
- Recent diamond drilling has discovered exceptionally high-grade tungsten (scheelite) mineralisation within the Western Queen gold system
- Drill-hole WQDD013 returned:
- 4m @ 4.58% WO3, 0.72 g/t Au from 174.85m; including
- 2.05m @ 8.71% WO3, 1.38 g/t Au from 176.85m; and
- 0.65m @ 18.35% WO3, 2.97 g/t Au from 176.85m
- Strong continuous tungsten anomaly outlined over 2km from drillhole XRF data parallels the Western Queen Shear and known high-grade gold mineralisation
- Tungsten occurs at surface between the Western Queen South and Western Queen Central open pits with widths up to 20 metres
- Follow up wet assays for tungsten of selected pulps from RC drilling which formed part of the 2021 mineral resource estimate at Western Queen have been submitted and will be reported when available
- Tungsten is considered a critical and strategic material in world economies due to its economic importance, supply risk and limited substitution options
In addition to the assaying, ultraviolet scanning of the diamond core from WQDD013 has highlighted scheelite within altered mafic. The mineralisation is essentially scheelite-pyroxene +/- magnetite+/-gold skarn zones 2.1Mt @ 2.42 g/t Au for 163,200oz 1
Figure 1 shows the white-blue fluorescence characteristic of scheelite under ultraviolet light. Mineralisation comprises of massive aggregates of white (visible light) grains (up to 5mm) of scheelite paralleling the dominant foliation within the shear zone.
Figure 1 – WQDD013 (0.65m @ 18.35 WO3) scheelite intersection under UV light*Analysis by pXRF is indicative and may not represent the true grade of tungsten
Of great significance is the subsequent review of all of the pXRF data routinely collected by Rumble which has shown tungsten is widespread within the Western Queen gold mineralising system.
Peter Harold, Managing Director and CEO commented“the discovery of the very high-grade tungsten at Western Queen is an unexpected bonus for us from the recent drilling which was targeting extensions to the high-grade gold lodes. While it is very early days the grades of the intersections are exceptional and well above the grades of other tungsten resources globally. We are now waiting with trepidation for the results from the 2021 drill pulps. This discovery shows the huge optionality of the Rumble tenements and the ability of our highly experienced exploration team to make new discoveries.”
Western Queen Tungsten Discovery
Tungsten mineralisation within drill hole WQDD013 (refer to Table 1) returned a spectacular intersection that included:
- 4.05m @ 4.58% WO3, 0.72 g/t Au from 174.85m; including
- 2.05m @ 8.71% WO3, 1.38 g/t Au from 176.85m; including
- 0.65m @ 18.35% WO3, 2.97 g/t Au from 176.85m.
Mineralisation contains large aggregates of scheelite grains (up to 5mm) occurring parallel to the main foliation trend. The mineralisation is essentially multiple scheelite-pyroxene (tremolite)+/-magnetite+/-gold exoskarn zones associated with the Western Queen orogenic shear zone (host to gold mineralisation) within dominant Archaean mafic amphibolite lithologies. The skarn development is thought to have been a later stage to the main gold event at Western Queen.
All previous drill holes completed by Rumble as part of the 2021 Western Queen gold resource estimate (2.1Mt @ 2.42 g/t Au for 163,200oz*) have subsequently been analysed for tungsten (W) by pXRF. Review of the pXRF analytical data has shown some 87 reverse circulation (RC) and diamond drill (DD) holes completed by Rumble have reported >500ppm W. Analytical results from pXRF analysers are indicative and may not reflect the true tungsten (W) grade.
Contouring of the pXRF tungsten (W) drill hole results has highlighted the following (refer to Figure 3):
- Very strong tungsten continuity over 2km (>100ppm W contour) with the same strike direction, orientation and position as the Western Queen Shear Zone which hosts the Western Queen gold deposits; and
- Between the Western Queen Central and Western Queen South open pits, the tenor of tungsten increases significantly with some 900m of strike >1000ppm W.
Additionally, a number of drill holes were strongly anomalous in tungsten (W) near surface within oxidised material
Next Steps
Re-assaying of select pulps from the previous Rumble gold resource drilling programs based on the pXRF tungsten analyses is underway to ascertain the spatial variability and tenor of the scheelite mineralisation. Up to 250 pulps from selected RC and diamond holes drilled by Rumble will initially be collected and submitted for wet analysis utilising complete digest through fusion XRF.
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This article includes content from Rumble Resources, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.
RTR:AU
High grade Massive Sulphide Intercepts Confirmed at Oval
HIGHLIGHTS:
- OVD027 confirms the continution of high grade massive sulphide from OVD0211 with an intercept of 6.1 metres of 4.16% Cu, 3.51% Ni, 0.G3g/t E3, and 0.13% Co from G8.2 metres encountered between broader high grade zones of:
- A dense disseminated intercept - 26.2 metres of 0.44% Cu, 0.52% Ni, 0.12g/t E3, and 0.03% Co from 72.0 metres and
- A net textured intercept - 15.3 metres of 1.15% Cu, 0.79% Ni, 0.35g/t E3, and 0.04% Co from 104.3 metres;
- A high grade broad intersection is confirmed at the central part of the Oval area by OVD026. It includes a massive sulphide intercept in hole OVD026 of 1.8 metres of 3.21% Cu, 3.32% Ni, 0.6Gg/t E3, and 0.14% Co from 105.0 metres within broader mineralisation of:
- 19.8 metres of 1.23% Cu, 0.98% Ni, 0.36g/t E3, and 0.05% Co from 91.2 metres.
OVD026 is located 100 metres northwest of the previously announced 8.8 metres of massive sulphide identified in drillhole OVD021.
On completion of the Phase 2 exploration work and receipt of all assays, Managing Director Gan-Ochir Zunduisuren, commented:“The 2024 Phase 1 and 2 drilling and exploration programs have confirmed the broad presence of high-grade mineralisation in the Oval gabbroic intrusion. The grades intercepted in some of the drillholes are exceptional and may be indicative of broader potential over a larger area, given Oval is a greenfields discovery.
The 2025 exploration program will focus on obtaining information on the size/metal content potential of the Oval Cu-Ni-PGE mineral system as well as targeting the possible deeper magmatic sources at Oval. Broader exploration is also planned at potential extensions of Oval and nearby look-a-like prospects. We look forward to updating shareholders on progress, with drilling expected to commence in around 8 weeks”.
Summary of Phase 2 exploration drilling at Oval Cu-Ni-PGE project
The Company’s recent drilling work has predominantly focused on finding high-grade mineralisation in the olivine-amphibole gabbro at the Oval project. The multiple intercepts of massive sulphide mineralisation with different ratios of metal contents throughout the Oval gabbroic intrusion is highly encouraging for the presence of one or more deeper sources of high grade mineralisation in the opinion of ABM.
Figure 1. Plan view of drillhole locations on high resolution magnetics map (RTP)
Drillhole OVD02c
Drillhole OVD026 was designed to test the Down-Hole Electromagnetic (DHEM) conductor plate identified as OVD007_L2_B (reinterpretation of OVD007_L2_A2 by Southern Geoscience Consultants), which exhibits a conductance of 1,000 siemens. The drilling intersected a total of 1G.8 metres of mineralisation with 1.23% Cu, 0.G8% Ni, 0.36g/t E3, and 0.05% Co from G1.2 metres including;
- 4.8 metres of @ 0.45% Cu, 0.43% of Ni, 0.14g/t E3, and 0.02% Co of dense disseminated mineralised gabbro from 91.2 metres,
- 6.6 metres of @ 1.56% Cu, 0.G0% Ni, 0.50g/t E3, and 0.04% Co of net textured mineralisation from G6.0 metres,
- 2.4 metres of @ 1.52% Cu, 1.3G% Ni, 0.43g/t E3, and 0.07% Co of semi massive sulphide mineralisation from 102.6 metres,
- 1.8 metres of @ 3.21% Cu, 3.32% Ni, 0.6Gg/t E3, and 0.14% Co of massive sulphide mineralisation from 105.0 metres, and
- 4.2 metres of @ 0.57% Cu, 0.45% of Ni, 0.21g/t E3, and 0.02% Co of dense disseminated mineralised gabbro from 106.9 metres (Table 1 provides a detailed breakdown of mineralisation intervals).
OVD026 is located in the Oval area, which is approximately 100 metres northwest of the previous intersection identified in drillhole OVD0213. This intercept may represent an extension of the known massive sulphide mineralisation in the Oval area and highlights the potential for further expansion of massive sulphide zones within the broader prospect area (Figures 1 and 3).
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This article includes content from Asian Battery Metals PLC, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.
