Timing of weathering-induced alteration and manganese deposits in Western Australia: evidence from K/Ar and 40Ar/39Ar dating

McDougall, IanChivas, A2015-12-132015-12-130361-0128http://hdl.handle.net/1885/93871Under particular climatic conditions, tetravalent K-Mn oxides can be formed during terrestrial chemical weathering of Mn ores. In this study the results of K/Ar and 40Ar/ 39Ar dating of weathering-related K-Mn oxides (mainly cryptomelane (K,Ba)Mn 8O 16 ·Keywords: chronology; manganese deposit; mineral alteration; weathering; AustraliaTiming of weathering-induced alteration and manganese deposits in Western Australia: evidence from K/Ar and 40Ar/39Ar dating199910.2113/gsecongeo.94.1.872015-12-12