The Toroparu Deposit and surrounding satellites are located within the Upper Puruni River Region of western Guyana and the Puruni Shear Corridor. The Puruni Shear is a northwest trending regional geologic feature that can be traced for several hundred kilometers into the goldfields of eastern Venezuela (see Map below). Several multi-million-ounce gold deposits including Toroparu, Aurora, and Omai (mined) hosted in the Guiana Shield volcano-sedimentary belts are related to these northwest trending shear corridors.
Satellite imagery combined with geochemical, and geophysical data interpretations indicate gold mineralization is associated with small, intermediate plutons within the Puruni Shear corridor. These indications are confirmed by core drilling at Toroparu and neighboring satellites.
The Upper Puruni Region hosts multiple mineralized systems in addition to the 6.9 million-ounce Toroparu Deposit. Several of the systems that have been drilled by Sandspring contain either satellite deposit gold reserves (SE Zone), satellite gold resources (Sona Hill) or have intercepted gold mineralization in saprolite and fresh Rock (Wynamu Hill, Ameeba).
Coincident anomalous gold geochemical features and geophysical anomalies indicate the potential for additional mineralized system discoveries along intrusive contact zones (e.g. Timmermans, Otomung). Several of these areas have been mined historically for alluvial gold.
Geologic evidence supports exploration for additional deposits and definition drilling of mineralization system discoveries within the sigmoidal flexure structure in the northwest trending Puruni Shear.