School of Physics, Chemistry and Earth Sciences
Faculty of Sciences, Engineering and Technology
Ahmad is a geochronologist specialising in the spatial-temporal development of ore systems. He holds a Ph.D. from The University of Adelaide (2022) focused on in-situ Rb-Sr dating via LA-ICP-MS/MS for Cu-Au mineralization in the Arabian Shield.
Dr. Redaa began his career as a Demonstrator (Teaching Assistant) at King Abdulaziz University in 2009, progressing to Lecturer in 2015 and Assistant Professor in 2022. His on-going research employs statistical programming and analytical techniques such as LA-ICP-MS(/MS), EPMA, and SEM.
Dr.Redaa's research interests focus on the application of in-situ Rb-Sr dating techniques using LA-ICP-MS/MS for determining mineral ages. He contributes to the field through his work on testing and developing reference materials specifically designed for in-situ Rb-Sr dating. Additionally, he conducts investigations into the timing of tectono-thermal events in the Arabian Shield, employing in-situ Rb-Sr and U-Pb dating methods. These research can enhance our understanding of the geological history and tectonic evolution of the Arabian Shield.
Date Position Institution name 2023 - ongoing Assistant professor King Abdulaziz University 2023 - ongoing Post-doctoral researcher University of Adelaide 2015 - 2022 Lecturer King Abdulaziz University, Jeddah 2009 - 2014 Demonstrator King Abdulaziz University, Jeddah
Language Competency Arabic Can read, write, speak, understand spoken and peer review English Can read, write and speak
Date Institution name Country Title 2017 - 2022 University of Adelaide, Adelaide Australia PhD 2011 - 2014 King Abdulaziz University, Jeddah Saudi Arabia MSc 2005 - 2008 King Abdulaziz University, Jeddah Saudi Arabia BSc
Year Citation 2023 Redaa, A., Farkaš, J., Gilbert, S., Collins, A. S., Löhr, S., Vasegh, D., . . . Garbe‐Schönberg, D. (2023). Testing Nano‐Powder and Fused‐Glass Mineral Reference Materials for
In Situ Rb‐Sr Dating of Glauconite, Phlogopite, Biotite and Feldspar via
LA‐ICP‐MS/MS. Geostandards and Geoanalytical Research, 47(1), 23-48.
2023 Klöcking, M., Wyborn, L., Lehnert, K. A., Ware, B., Prent, A. M., Profeta, L., . . . Zhou, T. (2023). Community recommendations for geochemical data, services and analytical capabilities in the 21st century. Geochimica et Cosmochimica Acta, 351, 192-205.
DOI Scopus1 WoS1
2022 Subarkah, D., Blades, M. L., Collins, A. S., Farkaš, J., Gilbert, S., Löhr, S. C., . . . Zack, T. (2022). Unraveling the histories of Proterozoic shales through in situ Rb-Sr dating and trace element laser ablation analysis. Geology, 50(1), 66-70.
DOI Scopus13 WoS11
2022 Redaa, A., Farkaš, J., Hassan, A., Collins, A. S., Gilbert, S., & Löhr, S. C. (2022). Constraints from in-situ Rb-Sr dating on the timing of tectono-thermal events in the Umm Farwah shear zone and associated Cu-Au mineralisation in the Southern Arabian Shield, Saudi Arabia. Journal of Asian Earth Sciences, 224, 11 pages.
DOI Scopus8 WoS5
2022 Alotabi, A. S., Yin, Y., Redaa, A., Tesana, S., Metha, G. F., & Andersson, G. G. (2022). Effect of TiO2 Film Thickness on the Stability of Au9 Clusters with a CrOx Layer. Nanomaterials, 12(18), 3218.
DOI Scopus1 Europe PMC1
2021 Alotabi, A. S., Yin, Y., Redaa, A., Tesana, S., Metha, G. F., & Andersson, G. G. (2021). Cr₂O₃ layer inhibits agglomeration of phosphine-protected Au₉ clusters on TiO₂ films. The Journal of Chemical Physics, 155(16), 164702-1-164702-10.
DOI Scopus5 WoS3 Europe PMC2
2021 Redaa, A., Farkas, J., Gilbert, S., Collins, A., Wade, B., Lohr, S., . . . Grabe-Schonberg, D. (2021). Assessment of elemental fractionation and matrix effects during in-situ Rb–Sr dating of phlogopite by LA-ICP-MS/MS: Implications for the accuracy and precision of mineral ages. Journal of Analytical Atomic Spectrometry, 36(2), 322-344.
DOI Scopus25 WoS21
2020 Shanshan, L., Santosh, M., Farkas, J., Redaa, A., Ganguly, S., Kim, S., . . . Zack, T. (2020). Coupled U-Pb and Rb-Sr laser ablation geochronology trace Archean to Proterozoic crustal evolution in the Dharwar Craton, India. Precambrian Research, 343, 16 pages.
DOI Scopus17 WoS13
2020 Armistead, S. E., Collins, A. S., Redaa, A., Jepson, G., Gillespie, J., Gilbert, S., . . . Razakamanana, T. (2020). Structural evolution and medium-temperature thermochronology of central Madagascar: implications for Gondwana amalgamation. Journal of the Geological Society, 177(4), 784-798.
DOI Scopus15 WoS12
- Armistead, S., Collins, A., Redaa, A., Jepson, G., Gillespie, J., Gilbert, S., . . . Razakamanana, T. (n.d.). Structural evolution and medium-temperature thermochronology of central Madagascar: implications for Gondwana amalgamation.
- Carson, C. J., Kositcin, N., Farkas, J., Champion, D. C., Whelan, J., Redaa, A., . . . Doublier, M. P. (n.d.). The late Paleoproterozoic Buddycurrawa Volcanics, South Nicholson region.
Date Role Membership Country 2018 - ongoing Member International Association of Geoanalysts United Kingdom
Date Event Name Event Type Institution Country 2018 - 2018 Geoanalysis 2018 Conference International Association of Geoanalysts Australia 2018 - 2018 12th International Geological Conference Conference Saudi Geological Survey Saudi Arabia
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