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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.Â
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