Targeting Large-Scale Au–Cu–Ag Deposits
Rumble Resources Ltd (ASX: RTR) has commenced an RC drill programme to test a number of new geophysical (conductors and magnetic) targets at the Amaryllis Au -Cu-Ag Prospect located on the Munarra Gully Project in Western Australia.
The drilling campaign follows the completion of a three phases target generation programme at the Munarra Gully Project, which delineated multiple high priority RC drill targets at the Amaryllis Au -Cu-Ag Prospect.
The Amaryllis Au-Cu-Ag Prospect (E51/1919 – 100% RTR) lies within an inferred belt of felsic to intermediate volcanic and intrusive rocks which lie under shallow cover (10 – 50m). A major fault/shear zone tectonic boundary lies immediately east of the prospect.
Historic and recent drilling by Rumble has defined a north-south trending, Au-Cu-Ag with minor Zn mineralised corridor over a strike of 1.5km, under 10 – 20m of recent cover. The mineralisation is completely open along strike. The mineralised corridor is at least 50m in width.
Historic regional wide spaced AC and RAB drilling north and south of the main Amaryllis zone has highlighted extensive copper and gold in basement anomalism.
Multiple parallel copper in basement anomalism predominantly occurs in inferred intermediate rocks over a strike of 5km with the northern anomalism open.
Gold in basement anomalism is associated with copper in a relatively wide corridor that also extends over a strike of at least 5km and is also open to the north.
A moving loop TEM survey (MLEM) has been completed over a strike of 2600m and width of 600m and was focused on the main zone of Au-Cu-Ag mineralisation at Amaryllis. A total of 12 generally north trending, west dipping conductorswere highlighted under 10 to 20m of conductive cover. The conductors ranged from 200m to 700m in length with conductance ranging from 200 to 300 siemens. Recent work by Rumble has shown the covered geology at Amaryllis comprises of relatively resistant intermediate volcanic and intrusive rocks with no conductive lithologies delineated by drilling.
Significantly, the mineralisation delineated recently by RC drilling (Rumble) did not respond as conductors. Rumble considers the 12 conductors as being high priority as they may represent significant sulphide mineralisation with associated high-grade Au-Cu-Ag.
An airborne magnetic survey (1127.5 line km) was also completed over a strike of 20km on 100m line spacing and 45m sensor height. The survey predominantly covered E51/1919 and E51/1927 with the aim to highlight potential structures associated with the Amaryllis Au Cu Ag mineralisation.
Several significant shear zones have been interpreted with two zones potentially associated with mineralisation. Petrographic and mineragraphic samples (27 samples) from both the recent RC drilling and historic drilling has confirmed the previously observed lithologies and mineralisation style (11 February 2020 RC drilling results by Rumble).
