Eighth annual report for EL 9742 Border Diamonds for the period 16 June 2008 to 15 June 2009

Abstract

An ovoid photo-geological feature on EL 9742 does not appear to be a simple drainage or regolith landform and may outline a collapsed kimberlite or carbonatiite volcanic vent. If so, it would be highly prospective for diamonds. Within the ovoid feature there are undisturbed outcrops of Jurassic DeSouza Sandstone, and so the ovoid feature must be even older. No units beneath the De Souza Sandstone, such as basement, have been identified within the ovoid feature; the nearest exposed basement (granite) is 4 km west. Two previous heavy mineral samples within the ovoid feature returned garnet: one had strong kimberlitis affinities. Previous work also revealed a number of gold anomalies within EL 9742, including an ironstone rockchip which returned 24 g/t Au (putative basement). This ironstone has never been re-identified, but widespread elevated Au values in soil samples suggest high gold prospectivity. Gold anomalism was found in a variety of regolith environments, including gravel sheetwash adjacent to outcrop and sandy sheetwash distal from outcrop. Follow-up detailed soil sampling of these previous soil anomalies has been completed. Results are pending.