Porphyry copper prospect in Limón, Costa Rica

Names and other identifiers

Alternate names Matama II
Tract name Cocos (003pCu4004)
Site status prospect

Geographic location

Country Costa Rica
State or province Limón
Geographic location -83.409, 9.68
Geologic map unit -83.409, 9.68
Nearby data

Geologic information

Deposit type Porphyry copper
Age determination method Geologic inference
Age range Miocene
Age reference geologic inference
Minerals bornite, chalcopyrite, malachite, molybdenite, pyrite
Associated rocks andesite, quartz diorite, quartz diorite porphyry, dacite porphyry
Tectonic setting mixed
Stratigraphic age Miocene

Commodity and development information

Development status Prospect
Major commodities Cu
Gold-Moly ratio -9999

Reference information

Comments Resources of 200 Mt at 0.2–0.3% Cu and 100 ppm Mo. Ten holes drilled in 1974; open. Partners: Alcoa in the 1970s. Average values in a 600 m drill hole: 0.28% Cu, 15 ppm Mo, <2g/t Au. Significant prospect.
Study area name Central America and Caribbean Basin
References Nelson (1995); U.S. Geological Survey and others (1987); Singer and others (2008)
Site reference Gray and others (2014)