The Condoto area is part of a Tertiary age (20Ma) island arc setting where oceanic crust of the Nazca plate to the west has been subducted and accreted under the Cretaceous Western Cordillera oceanic crust that lies in the foreground to the northern end of the Andes. To the west of the regional town of Condoto lies the Atrato San Juan Basin which has been formed from the deposition of Tertiary clastic sediments in the fore arc of the island arc system.
The emplacement of magmatic intrusions into the shallow crust has included the following:
Alto Condoto Ultramafic Intrusive Complex:
This intrusion is aged at 20 Ma and is the youngest of its type currently known in the world. The inner core is composed of dunite which has recorded enrichment in platinum group metals and gold. The dominant precious metals are platinum and gold. The Alto Condoto complex covers an area of approximately 50 square km with a maximum length of 9 km and maximum width of 6 km.
Vira Vira and El Paso High Magnesium Basalt Intrusive Complexes:
These are genetically related to the Alto Condoto source magma, representing early fractionation of Alto Condoto in the Tertiary Lower Miocene (20-23 Ma). The two complexes host ultramafic peridotites which are also enriched in platinum group metals and gold.
In 2011, the company engaged R. J. Fletcher & Associated to provide geological consulting services in order to review the explorations potential of the Condoto region of Choco Department, Colombia. Their work is to examine:
- The historical production from Choco Pacific’s historical dredging operations;
- The exploration potential for alluvial platinum and gold;
- The exploration potential for the hard-rock source(s) of the platinum group metals to the east of the old Choco Pacific dredging grounds; and,
- The exploration potential for hard-rock gold deposits to the east of the old Choco Pacific dredging grounds.