Sir: The authors are to be congratulated for their contribution to the greater understanding of the Aggeneys-Gamsberg district and Bushmanland Group through the addition of new detrital zircon age data. We trust that these data will ultimately contribute to a better understanding of the depositional age of the Bushmanland Group, as well as the tectonic evolution for this portion of the Namaqualand Metamorphic Province (Fig. 11). While we concur with the authors’ interpretation that deposition of the Bushmanland Group, and associated base metal sulfide deposits of the Aggeneys-Gamsberg district, must be younger than 1650 Ma, as previously concluded...

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