Lithium-cesium-tantalum (LCT) pegmatites are important resources for rare metals. For Cs only
the LCT pegmatites with the zeolite group mineral pollucite at Bikita (Zimbabwe Craton) and
Tanco (Superior Province Craton) are of commercial importance. Common characteristics of
world-class LCT pegmatite deposits include their Meso- to Neoarchean age and geological setting
within greenstone belt lithologies on Archean Cratons. This study presents the first coherent
and comparative scientific investigation of five major LCT pegmatite systems from the Yilgarn
Pilbara and Zimbabwe Craton. For the evaluation of their Cs potential and of the genetic
concepts of pollucite formation the pegmatites from Wodgina Londonderry Mount Deans and
Cattlin Creek were compared to the Bikita pollucite mineralization. The integration of the new
data (e.g. geochronological and radiogenic isotope data) into the complex geological
framework: 1) enhances our knowledge of the formation of LCT pegmatite systems and 2) will
contribute to the further exploration of additional world-class LCT pegmatite deposits which
3) may host massive pollucite mineralisations.
