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Mineralogy of the Tertiary Clay Deposits in Makkah and Rabigh Quadrangles, West Central Arabian Shield, Saudi Arabia

Sultan Qaboos University Journal for Science. 2002;7(2):259-277 DOI 10.24200/squjs.vol7iss2pp259-277

 

Journal Homepage

Journal Title: Sultan Qaboos University Journal for Science

ISSN: 2414-536X (Online)

Publisher: Sultan Qaboos University

LCC Subject Category: Science: Science (General)

Country of publisher: Oman

Language of fulltext: English

Full-text formats available: PDF

 

AUTHORS


M.H. Basyoni (Faculty of Earth Sciences, King Abdulaziz University, Jeddah, Saudi Arabia)

M.A. El Askary (Department of Geology, Faculty of Science, Alexandria University, Egypt)

N.A. Saad (Department of Geology, Faculty of Science, Alexandria University, Egypt)

R.J. Taj (Faculty of Earth Sciences, King Abdulaziz University, Jeddah, Saudi Arabia)

EDITORIAL INFORMATION

Double blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 8 weeks

 

Abstract | Full Text

The mineralogy of the Tertiary clay deposits in Makkah and Rabigh quadrangles was thoroughly investigated by X-ray diffraction and differential thermal and thermogravimetric analyses in addition to other techniques. Results show that the investigated samples are predominantly composed of montmorillonite (Ca++ and/or Mg++ rich variety) and kaolinite, associated with subordinate illite and minor chlorite. Mixed layer montmorillonite-illite is recorded only in two samples. The relative abundance of these minerals by X-ray diffraction analysis showed that the studied clay deposits are of three types. The first, which is the most common, is highly montmorillonitic, the second is made up of a mixture of montmorillonite followed by kaolinite and illite and the third is highly kaolinitic with some montmorillonite. Generally, kaolinite shows a southward increase in Makkah quadrangle while chlorite, as a minor component, shows a northward increase in Rabigh quadrangle.