DGPR survey identifies multiple critical anomalies, reinforces Au-Cu Prospects at Krakatoa’s Bell Valley

by Leena Thomas
Image: Krakatoa Resources Limited

Krakatoa Resources Limited (ASX: KTA) announced that the results of its recent Deep Ground Penetrating Radar (DGPR) survey have reinforced Au-Cu prospectivity at Bell Valley Target within the Belgravia Project, NSW.

The company reported that the DGPR results reveal several anomalous zones in the Bell Valley Target Area.

KTA said that the results have confirmed the previously announced Bella, Lara 1 and 2 anomalies, and generated a new zone in southwest, the most proximate target to Copper Hill. Krakatoa noted that multiple DGPR anomalies are open to the north and south.

Krakatoa said that the interpreted DGPR anomalies are coincident with existing drilled anomalous gold and multielement geochemistry; identified zones of monzodiorite intrusion; and, deep magnetic low feature characteristic of a porphyry-style deposits such as Copper Hill Au-Cu Deposit.

The dub-surface DGPR anomalies are interpreted to represent irregular quartz stockworks, sheeted quartz veining and disseminated sulphides plausibly associated with porphyrystyle Cu-Au or related styles of mineralisation.

KTA announced that Induced polarisation (IP) survey would be implemented to focus on future diamond drilling.

Belgravia project

The Belgravia project is located 40Km North and along trend of Australia’s biggest gold mine, Cadia owned by Newcrest Mining Limited.

The project is located in the central part of the Molong Volcanic Belt (MVB), between Newcrest Mining’s Cadia Valley Mine and Alkane Resources’ Northern Molong Porphyry Project and adjacent to the Copper Hill porphyry Cu‐Au deposit.

Within the MVB, four major porphyry systems are identified: Cadia – Newcrest’s Cadia Valley Operations (Cadia Hill, Ridgeway, and Cadia East); Copper Hill, which underlies the Belgravia Project; Cargo; and Boda.

Significant target areas within the Belgravia project include Bell Valley (Copper Hill North East), Sugarloaf Creek, Guanna Hill, Shades Creek, Nandillyan, and Strathmore. Important prospects include Lara 1 and 2, Power, Lee, and Bella.

DGPR survey at Bell Valley

The company had partnered with Loza Radar Australia to undertake a deep ground penetrating radar (DGPR) survey at Belgravia to map the sub-surface geology and provide evidence of favourable hosting environments for mineralisation.

The survey acquired a total of 15,373 line metres across 13 lines at Bell Valley.

The surveyed lines at Bell Valley were intentionally designed to lie over earlier shallow aircore drilling, to assist and constrain the interpretation in tandem with geological, structural, drilling and surface geochemical data. In a couple instances’ lines were offset by recent cropping.

Multiple key anomalies identified

The company announced that several key anomalies were identified in the DGPR survey at Bell Valley.

KTA said that each is thought to represent irregular quartz stockworks, sheeted quartz veining and/or disseminated sulphides plausibly associated with Late Ordovician porphyry mineralisation styles. Other styles present could include structurally controlled quartz veining.

The company said that multiple DGPR anomalies are open to the north and south

Bella, Lara 1 and 2 targets

The company reported that three of the composite DGPR anomalies lie over or adjacent to previously delineated and reported interpreted porphyry-style Bella and the Lara 1 and 2 targets.

KTA said that the anomalies at Bella and the Lara 1 and 2 coincide directly with drill-indicated mineral alteration and anomalous multielement geochemistry, key geological features including interpreted structure or lithological contacts, interpreted discrete magnetic features, including the low magnetic signature which is observed to control or influence the location of mineralisation at the Copper Hill deposit and several additional prospects.

Krakatoa said that drill-indicated gold mineralisation in quartz gravels preserved beneath Tertiary basalt coincides with the western DGPR anomaly and lies just north (downstream) of the actual (eastern) Bella anomaly.

New anomaly revealed

The company reported that a composite DGPR anomaly also lies in the southwest of the Bell Valley target area, the closest to Copper Hill.

Potential lie at depth

The Company said that it considers the economic potential for copper-gold mineralisation associated with a porphyry in the Bell Valley area may lie at depth (>200m).

Secondary target

KTA said that the DGPR supports high-grade copper-gold veins potentially extending upwards from a porphyry source forming a secondary target at shallower levels.

IP survey planned

The company announced that an induced polarisation (IP) survey to locate zones of sulphide mineralisation as detected by DGPR, will be completed at Bella and the Lara’s. KTA said that the IP will focus on future diamond drilling at these prospects.

Next steps

The company said that integration of the DGPR dataset with future geophysical, geochemical sampling and geological mapping will be ongoing.

Management comments

Krakatoa’s Executive Chairman, Colin Locke said: “We continue to build a convincing narrative for the drilling of deeper targets at Bell Valley, and doing so through considered, cost-effective exploration.

The multipronged coincidence between the DGPR, drilling geochemistry, mineral alteration, magnetics, and geological structure, has refined and focused the exploration effort across the Bell Valley target area, where we are fortunate enough to be spoilt for choice. The forthcoming induced polarisation survey will give us great insight for a focussed diamond drilling campaign.”