The Comet Project comprises 3 granted tenements and one Application Area. The Proof-of-Concept Study was limited to work undertaken on EL 6443 (Comet) and EL 6633 (Gina). The project area is centred ~85 km south-southwest of Coober Pedy within the Northern Gawler Craton. The largest impediment to exploration in the area is the shallow transported cover which effectively masks the bedrock geochemical response. Historical first pass exploration relied on calcrete sampling for targeting, yet subsequent research has determined that calcrete sampling is only effective in areas where the remnant in-situ saprolite is present at near surface and that as little as 2 metres of transported cover could mask a primary bedrock gold response. This Accelerated Discovery Initiative Round 2 (ADI RD02-279) funded Proof-of-Concept Study proposes to overcome the cover masking issue by undertaking a regional "deep" geochemical sampling program of the top of the in-situ saprolite zone to directly sample for supergene and/or relic gold accumulations representative of the geochemical signature of the fresh basement rock below. The ADI Program comprised several phases of exploration drilling. A total of 889 RAB holes were drilled for 12,798 m and 123 aircore holes for 2193 m. The initial phase consisted of regional scale aircore/RAB drilling on a 400 m x 400 m grid spacing down to a 200 m spacing proximal to the Comet Gold Prospect, with drilling undertaken to directly sample the top of the in-situ “saprolite” zone clays below the younger transported cover. A simple log was created for each hole and composite sample from or straddling the contact were taken, with a calcrete and end-of-hole sample taken when the top of the saprolite could not be obtained. For the drilling completed on EL 6633, both a calcrete and saprolite contact sample were collected to allow for comparison between the two mediums. Drill samples were taken to ALS laboratories in Adelaide and were assayed for 40 elements including Au by ICP-MS and ICP-AES after an Aqua Regia digest. Several areas of gold anomalism were identified, with follow up drilling of the areas identified through the course of the program was also completed including deeper aircore drilling at the Target 14 and Comet prospects to allow for the characterisation of the gold dispersion halo within the saprolitic zone. Positive intercepts include drillhole 596 with 3 m @ 21 ppb Au from 18 m and drillhole 738 with 4 m @ 23 ppb Au from 23 m, while follow deeper drilling at Target 14 returned 20 m @ 0.13 g/t Au from 16 m in hole 21T14RC05. Other gold anomalies identified later in the program will undergo further exploration work beyond the scope of the ADI program and are ongoing. An area of anomalous light rare earths elements (REE) cerium and lanthanum was recognised within the regional drilling program, proximal to Target 14, and was followed up with 118 holes re-assayed for a full suite REE analysis of which 105 holes returned significant results for Total Rare Earth Oxide (TREO) above a nominal cut-off of 350 ppm. An independent petrological investigation was undertaken by Mason Geoscience Pty Ltd on 12 drill chip samples from the Target 14 prospect to further investigate a rare earth element anomaly identified in the regional drilling survey. Positive results from the study included the identification of several new gold anomalous areas which have little to no surface geochemical response. Later drilling at Target 14 located primary gold mineralisation beneath the saprolite gold anomaly at this location. Saprolite geochemical sampling has been found to greatly reduce geochemical noise present in surface sampling techniques and anomalies found are diagnostic of primary mineralisation present below in the fresh rock. It greatly reduces the number of false anomalies that surface sampling techniques encounter. the study uncovered significant rare earth concentrations over wide areas which were previously unknown and have no surface geochemical expression. Early work suggests the rare earths in clays will have a component, certainly in the upper saprolite, present in ionic form allowing for the potential for low-cost Ion- Adsorption Rare Earth Clay extraction processes. The Comet Proof-Of-Concept Project achieved desired outcomes, demonstrating blind primary gold and other metals can be effectively tested using the top of saprolite sampling technique. It has proved a relatively cost effective and time efficient technique to screen large greenfield areas. The program had the added bonus of determining high concentrations of rare earths which had previously been un-recognised in the region. This has led to a substantial increase in exploration activity and may lead to new discoveries in the region.