Middle Island Resource has completed the review of drill hole CWDD001 at the Crosswinds prospect. That drill hole, along with 3 others, comprised the Company's initial drill program at the Barkly Copper-Gold Project in the Northern Territory. All holes drilled within the first drill program were drilled at the Crosswinds Prospect, which in late 2020 4, was identified as a surface occurrence of malachite (copper carbonate).

On discovering this copper occurrence, a number of samples were taken and spot pXRF results returned between 24.8% and 76.25% Cu with a composite chip sampling assay of 130m at 0.76% Cu returned from Intertek. The 4 holes drilled all intersected IOCG alteration (pyrite ± hematite ± silica) which appears to be of an IOCG affinity. Shown below is a basic break down of the geology of each of the holes.

All holes intersected the Georgina Basin at the top of the hole, transitioning into the Helen Springs Volcanics which has an age range of around 511Ma and then transitioning into the Alroy Formation towards the bottom of the hole. Basement Alroy Formation lithologies consist of a thick sequence of red to green to blue sandstones through to red to purple siltstones and mudstones and white to cream limestones which are cut by varying amounts of carbonate, quartz and hematite veins. Three out of the four holes drilled also intersected metasediments/metasedimentary schists that have been subject to high metamorphic grades creating large amounts of secondary biotite along with shear planes and intense foliation (hole CWDD007 did not intersect foliated metasediments due to the interpretation of them being stoped out by mafic units).

Further down the holes from these meta-sediments in the first three holes (hole CWDD007 excluded) intersected medium grained red to white/cream granites, whereas hole CWDD007 intersected fine to medium grained Mafics. Approximately 2km ESE of MDI's holes is a government hole, NDIBK10, which has been drilled into the same rocks that were identified in MDI's holes. Age dating has been undertaken on this hole and a graphical log with age ranges in the relevant positions of sampling.

As can be seen, the Helen Springs volcanics have an age range of approximately 511Ma - the hole then transitioned in the underlying sediments with a maximum deposition age (U-Pb in Zircons) of above and below the unit A unconformity yielding ages of 902 ± 34 Ma (unit A) and 1649 ± 37Ma (unit E) respectively, based on youngest concordant zircon grains. This age dating indicates that the thin Unit A is Neoproterozoic (1000-500Ma) and likely represents a continuation of the Pre-Cambrian part of the Georgina basin in this area whereas the sediments represent sedimentation in the Meso and Paleoproterozoic (1000-2500Ma). Further detailed knowledge of the bottom of the 500 million-year- old Georgina Basin allows gravity and magnetic targets to be truncated at the contact with the underlying sediments (circa 1.3-1.8 billion years old) removing noise from the signatures and thus allowing for better target generation of the airborne geophysics undertaken.

The occurrence of hematite-flooded, meta-sedimentary and volcanic units and the age range of rock units in the area Cross Winds prospect is considered by MDI to be of IOCG affinity, and is another positive result from the Company's reconnaissance drill program at the Barkly copper-gold project. As mentioned previously in this, and previous announcements, over 40,000 line-kms of aerial geophysics have been flown over the Barkley project. This survey has shown that the geology, magnetics and gravity is not as simple as first thought, opening up interesting possibilities in identifying and locating IOCG deposits.

The aerial survey undertaken by MDI in 20225 highlighted numerous areas of magnetic and gravity features interpreted to be large "blind" batholithic granites which contain iron sulphide mineralisation. An internal review of the geophysical surveys highlighted that the gravity and magnetic features appear to extend from the basement geology (Red sediments, metamorphic sediments and schists) into the overlying unmetamorphosed and structurally unchanged Georgina basins sand/silt and limestones. Southern Geoscience has been given the task of downloading the open file SEEBASE survey which is a NT Government survey that takes into account geological mapping, regional and local geophysical surveys, be that IP, magnetics, gravity or seismic surveys, both 2D and 3D, deep petroleum well, shallower water wells along with government funded drilling to ascertain the depth of the recent (approximately 500Ma) cover over the greater Georgina Basin.

This SEEBASE survey has been downloaded and a 3D model generated to ascertain the base of the Georgina Basin/underlying basement lithologies. Figure 5 shows a 3D representation of the Georgina Basin/underlying basement contact and, as can be seen, most of the basement contact within the tenure owned by MDI is within 500m of the current land surface. The next step is to collate all of the open file drilling data along with open file Seismic data in the region and correlate this SEEBASE surface to validate its surface.

Once this has been done, the aerial survey undertaken by MDI will be remodeled using this basement/basin isosurface as a hard boundary to ascertain if the gravity and or magnetic features are present within the basin cover or the basement geology. This will produce Total Magnetic Intensity and spherical Cap Bouguer gravity 3D models and once this has been done, the priority targets will be ascertained and cross referenced with known drill holes in the vicinity to ascertain if the anomalies are due to batholitic granites which can then be ranked lower or are due to an unknown source which could potentially be IOCG mineralisation. The unconformity between the overlying Helen Springs Volcanics and Neo-Proterozoic basement rocks was intersected in all four of MDIs holes ranging from 220m to 300m down hole.

These four boundaries will be used to validate the SEEBASE survey, and if they do differ, will be used as a hard point whereby the SEEBASE survey can be updated to reflect the correct depth of basin cover at that point data.