Granite intruding into Granodiorite: An example from the Damara Belt, South West Africa
Until now (Smith, 1965) it was thought that in the central Damara Belt, South West Africa, the Red Granite and the Salem Granodiorite are two magmatic bodies separated by (essentially) marbles. Three places were discovered, where the marbles are missing; in all three places the Red Granite intrudes the Salem Granodiorite. Experimental melting done with samples from two of these localities allows to appraise the likely conditions during the intrusion of the Red Granite (680° C, 4 kb H2O-pressure). The White Granites - until now thought to be late or post kinematic - are a geologically heterogeneous group, at least in one place such an intrusion precedes that of the Red Granite.
Geologische Rundschau