Lombaard, B.V.2022-05-172022-05-172021/11/091952*https://repository.up.ac.za/handle/2263/85439Dissertation (MSc)--University of Pretoria, 1952.In 1898 Molengraaf discovered the Leeufontein Alkaline Complex and gave a description of a "nepheline-syenite from the farm Leeuwfontein (320) (2, p .89). In the same year Henderson (1, p.45) gave a description of the soda-syenite under the name of “hatherlite” but in 1904 Molengraaf (3) proposed the name "anorthoclase-Amphibole-pyroxene-syenite'' for Henderson's hatherlite.en© 2020 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.UCTDGeologyLeeuwfonteinnorth-east PretoriaDissertation