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Colin Hay

Rumble Resources (ASX: RTR) has obtained “exciting” new high-grade assay results returned from extensional drilling at the Mato Prospect, part of the Earaheedy Project in Western Australia.

The drill holes are the first extensional drilling since the original high-grade discovery. Significantly, high -rade mineralisation now extends up to 1600m across strike and 350m along strike from the original discovery drill section at Mato and remains open in all directions.

Mato Prospect RC Drilling – E69/3787 and E69/3862 - RTR 100%

Extensional drilling at the Mato Prospect, within the 100% Rumble tenements,E69/3787 and E69/3862, has returned new high-grade Zn-Pb sulphide intersections in both the up-dip position of, and 350m along strike to the northwest of the original Mato discovery drill section.

The reverse circulation (RC) drill programme completed in December 2023 consisted of only 13 holes for a total of 2152m, five of which have returned high-grade Zn-Pb sulphide intersections. The most recent assay results include:

  • 12m @ 6.07% Zn + Pb, 7.86g/t Ag from 146m (EHRC776) including 8m @ 8.71% Zn + Pb, 11.25g/t Ag from 148m
  • 19m @ 4.23% Zn + Pb, 3.93g/t Ag from 119m (EHRC778) including 12m @ 5.28% Zn + Pb, 4.55g/t Ag from 119m
  • 13m @ 3.31% Zn + Pb, 3.3g/t Ag from 145m (EHRC783) including 6m @ 6.95% Zn + Pb, 6.54g/t Ag from 145m

The latest drilling at the Mato Prospect has extended sulphide mineralisation to over 1600m along the original discovery section and preliminary geological interpretation of the drilling has highlighted multiple faults, interpreted to potentially represent feeder structures that control the distribution of higher-grade Zn-Pb sulphide mineralisation throughout the Mato Prospect area.

The feeder faults and high-grade mineralisation at the Mato Prospect is inferred to strike northwest, though further RC extensional drilling along strike is required to confirm the trend.

Only two broad spaced RC drill holes, EHRC787 and EHRC786, were completed over 1100m along strike to the southeast of the original discovery section. These holes were deeply oxidised, which has likely impacted the tenor of the mineralisation intersected.

A large structural repetition of the host Navajoh Unconformity Unit and Sweetwater’s Well Dolomite stratigraphy is interpreted to occur to the south of this drilling as the interpreted dip of stratigraphy throughout the 10km long Mato Mineralisation Corridor does not match its assumed surface position identified from field mapping and geochemical sampling.

Therefore, it is interpreted that drill holes EHRC787 and EHRC786 are likely situated adjacent to the axis of a district scale fault, and that further drilling is required to the south of the drilling to date to test for the potential repetition of high-grade mineralisation.

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