Braemar Sapphire Mine

Stratigraphic mapping of historic and contemporary excavations conducted by Pecover & Coeraads (1989) reveal a complex and contemporaneous history of Tertiary volcanism and Mid-Late Cenozoic Alluvial processes. This study shows Sapphires being present in interpreted in reworked, tuffaceous and volcaniclastic units which outcrop and sub-outcrop at Braemar. Costeaning across the Braemar deposit identified high concentrations of Sapphire above the Devonian Siltstone basement. The report concludes the highest concentrations to occur in areas where several cycles of reworking have occurred and in recent and paleo-channel deposits where trapping mechanisms are present.

Based on the intrusive and stratigraphic relationships exposed at “Braemar”, Pecover and Coenraads (1989) consider the following events to have taken place chronologically;

  1. Commencement of hydro-volcanic activity and the production of intrusive red breccias and associated surficial red volcaniclastic rocks (some Sapphire bearing) Approx-30Ma.
  1. Commencement of hydro-volcanic activity and the production of intrusive red breccias and associated surficial red volcaniclastic rocks (some Sapphire bearing) Approx-30Ma.
  2. Disruption of drainage and the infilling of Palaeozoic basement topographic lows by tertiary volcaniclastic rocks and lava.
  3. Erosion of Paleozoic basement rocks and Tertiary volcanic rocks followed by the deposition of Sapphire bearing Tertiary alluvial gravels, debris flow deposits and sapphire bearing, immature, fluvio-lacustrine, tuffaceous sediments.
  4. Termination of fluvio-lacustrine deposition by the eruption of the Ogliocene basaltic lava which infilled the channel system
  5. The waning of Tertiary volcanic activity followed by erosion and exhumation of sapphire bearing Tertiary volcaniclastic rocks and fluvio-lacustrine sediments and the formation of sapphire bearing, Holocene (recent) alluvial deposits.

“Braemar” is a proven sapphire resource and is of considerable historic importance. The main “Braemar” palaeochannel flowed from Wire Creek in the east and occupies a narrow palaeocatchment area trending east west. This is of similar size and orientation to the palaeo-Swanbrook catchment area to the north. The headwaters for this palaeo-system are located in the vicinity of Spring Mountain. Sections of the “Braemar” palaeochannel upstream (to the east) are highly prospective for large reserves of gem-quality sapphire. Elsmore Resources will test a number of prospective sites in the area of tenure.