Locality
30°40´39" east longitude, 17°8´57" south latitiude   [ map ]

Name
Mtorashangu River on the western slope of the Great Dyke, Zimbabwe, Afrika

Personal relationship of donor
Scientific investigation of alluvial sediments within the frame of the research project *Great Dyke*

Historical relevance of location
Chromite mining since the last century. The Great Dyke, with an extension of 550 km, is the world\'s largest elongated layered intrusion. Because of its chromite and the platinum group elements the Great Dyke is of great economic significance

Geological relevance of location
The *Great Dyke Event* marks the border from the Archean to the Proterozoic.

Classification of the earth

Structure	Heavy mineral concentrate from river sand.
Colour	mainly black: chromite; brown: pyroxene
Age	river sand: alluvial (> 1 mio years)minerals: 2500 Mio years
other	Erosion products from the 2500 mio years old Great Dyke with traces of gold.

Donor

Dipl.-Ing. Lothar Gast,
 Federal Institute for Geosciences and Natural Resources,
 Hannover,
 Germany