Geological setting and mineral system The prospect lies in the Permo-Triassic, high-K, I-type granite province of the Tenterfield–Stanthorpe region, southern New England Orogen, hosted entirely within the Lower Triassic Stanthorpe Adamellite (English 1996; GSNSW DIGS R00002143). Mineralisation occupies a steeply west-dipping structure striking 022°, expressed as a 15–20 m quartz–sericite alteration zone hosting a high-grade silver lode; old workings traceable ≈ 350 m north of

Geological setting and mineral system Plumbago Creek sits in the Emu Creek Block of the southern New England Orogen, where the Permian Bruxner Park Adamellite (Pc_b, NSW Seamless Geology / MinView) intrudes a Carboniferous–Early Permian limestone–shale–chert sequence and marmorises the carbonate lenses. Government regional mapping classifies the iron bodies as probable contact skarns formed by reaction between the granite and the limey Permian sediments (Brownlow 1989, R00004

Geological setting and mineral system Back Creek is a five-occurrence prospect cluster (WN0006–WN0010) in hornfelsed Carboniferous Texas Beds on the western flank of the New England Orogen, ~30 km west of Tenterfield, NSW. GSNSW classifies all five occurrences as cassiterite (Sn) stockworks hosted in the Texas Beds (Brown, Henley & Stroud 2001, GS2001/087); the As–Ag–Pb–Zn–Bi associations carried into targeting are the WMC 1992–95 rock-chip overlay (R00003116). CAADIA's worki