Mbetilonga

Porphyry copper prospect in Guadalcanal, Solomon Islands

Names and other identifiers

GMRAP ID 557
Alternate names Hambusimaloso, Vuralonggoma, Guadalcanal Joint Venture
Tract name Outer Melanesian Arc II - Melanesia Area (009pCu7210)
Site status prospect

Geographic location

Country Solomon Islands
State or province Guadalcanal
Geographic location 160.16424, -9.61194
Geologic map unit 160.16424, -9.61194
Nearby data

Geologic information

Deposit type Porphyry copper
Age determination method Geologic inference
Age range Oligocene
Age reference Singer and others (2008)
Minerals alunite, apatite, barite, bornite, chalcocite, chalcopyrite, covellite, diaspore, gold, goethite, gypsum, hematite, limonite, malachite, magnetite, pyrite, sericite, silver minerals, sphalerite, tenorite
Associated rocks andesite porphyry, tonalite, andesite, diorite, pyroclastics
Tectonic setting island arc
Stratigraphic age Oligocene

Commodity and development information

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

Reference information

Comments Exploration license area targeting low-grade, high-tonnage porphyry copper with a copper-rich oxide cap. Soil copper >0.1% Cu over an area of 3 square km outlined and trenched; 155 m at 1.33% Cu (2005). Prospect is within a large nested caldera structure 15 km S of Honiara, Guadalcanal. Exploration by Utah in 1970s showed widespread high Cu in soils; rock chip float samples with >1% Cu. Exploration.
Study area name Southeast Asia and Melanesia
References United Nations (1985); Singer and others (2008)
Site reference Hammarstrom and others (2013)
Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at http://pubs.usgs.gov/of/2008/1155/.
United Nations, 1985, Atlas of mineral resources of the ESCAP region—Solomon Islands: New York, United Nations Economic and Social Commission for Asia and the Pacific (ESCAP), v. 2, 35 p., 2 sheets.