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1- Ahmed, A.H., Arai, S. and Attia, A.K. (2001): Petrological characteristics of the Pan African podiform chromitites and associated peridotites of the Proterozoic ophiolite complexes, Egypt. Mineralium Deposita, 36, 72-84.
2- Ahmed, A. H. and Arai, S. (2002a): Platinum-Group Elements Geochemistry in Podiform Chromitites and Associated Peridotites of the Precambrian Ophiolite, Eastern Desert, Egypt. 9th International Platinum Symposium, Jul. 21 - 25, 2002, Montana, Billings, USA, 1-4.
3- Ahmed, A.H. and Arai, S. (2002b): Unexpectedly high PGE-chromitite from the deeper mantle section of the northern Oman ophiolite and its tectonic implications. Contributions to Mineralogy and Petrology, 143, 263 - 278.
4- Ahmed, A.H., Arai, S. and Kadoshima, K. (2002): Possible Platinum-Group Element (PGE) Oxides in the PGE-Mineralized Chromitite from the Northern Oman Ophiolite. Journal of Mineralogical and Petrological Sciences, 97, 190-198.
5- Ahmed, A.H. and Arai, S. (2003): Platinum-group minerals in the podiform chromitites of the Northern Oman ophiolite. The Canadian Mineralogist, 41, 597-616.
6- Ahmed, A.H. and Arai, S. (2003): Platinum-group elements mineralogy of late Proterozoic podiform chromitites from the Eastern Desert of Egypt: A preliminary result. Final proc. 7th Biennial SGA Meeting, Athens, Greece. In: Eliopoulos et al. (eds.), Mineral exploration and sustainable development, Millpress, Rotterdam, pp. 555-558.
7- Arai S., Uesugi J., and Ahmed A.H. (2004): Upper crustal podiform chromitite from the northern Oman ophiolite as the stratigraphically shallowest chromitite in ophiolite and its implication for Cr concentration. Contributions to Mineralogy and Petrology, 147, 145-154.
8- Torabi, G., Sabzehei, M., Arai, S, Ahmed, A.H., Emami, M.H. (2004): Different phases of Rodingite formation in Anarak Ophiolite (NE of Isfahan Province, Iran). Iranian Journal of Crystallography and Mineralogy 12, 77-92.
9- Arai, S., Sabzehei, M., Ahmed, A.H. and Torabi, G. (2004): Ashin-Zavar Ophiolitic melange as a metamorphosed oceanic crust (NE of Isfahan Province, Iran). Iranian Journal of Geosciences.
10- Ahmed, A.H., Arai, S., Yasser, M.A. and Rahimi, A. (2005): Chromian Spinel as a Petrogenetic Indicator of the Mantle Section of Bou Azzer Neoproterozoic Ophiolite Complex, Anti-Atlas, Morocco. Precambrian Research 138, 225-234.
11- Helmy, H.M., Ahmed, A.H., Kagami, A., Arai, S. (2005): Sm/Nd and platinum-group elements geochemistry of a late-Precambrian Alaskan-type complex from the Eastern Desert of Egypt. In: "Platinum-Group Elements – from Genesis to Beneficiation and Environmental Impact", Törmänen, T.O., Alapeiti, T.T. (eds.). 10th Inter. Pt Symp., Finland, 102-105.
12- Ahmed, A.H., Shoji Arai, Y. M. Abdel-Aziz, M. Ikenne, H. Gahlan, A. Rahimi (2005): Distribution of Cu, Ni, Au and PGE in the mantle section of the Neoproterozoic Bou Azzer ophiolite, Anti-Atlas Morocco: Preliminary results. In: "Platinum-Group Elements – from Genesis to Beneficiation and Environmental Impact", Törmänen, T.O., Alapeiti, T.T. (eds.). 10th Inter. Pt Symp., Finland, 273-276.
13- Yasser, M.A., Ahmed, A.H., Arai, S., and Rahimi, A. (2005): Oxides and sulfides mineralogy of the Late Precambrian ophiolite from Bou Azzer, Anti-Atlas, Morocco. Assiut University Journal of Geology 34, 1-23.
14- Ahmed, A.H., Hanghog, K., Kelemen, P., Hart, S. and Arai, S. (2006): Osmium Isotope Systematics of the Proterozoic and Phanerozoic Ophiolitic Chromitites: In-situ Ion Probe Analysis of Primary Os-rich PGM. Earth and Planetary Science Letters 245, 777-791.
15- Gahlan, H. A., Shoji Arai, Ahmed, A.H., Y. Ishida, Y. M. Abdel-Aziz, A. Rahimi (2006): Origin of Magnetite Veins In Serpentinite From The Late Proterozoic Bou-Azzer Ophiolite, Anti-Atlas, Morocco: An Implication For Mobility of Iron During Serpentinization. Journal of African Earth Sciences 46, 318-330.
16- S. Arai, Y. Shimizu, S. A. Ismail and A. H. Ahmed (2006): Low-T formation of high-Cr spinel with apparently primary chemical characteristics within podiform chromitite from Rayat, northeastern Iraq. Mineralogical Magazine 70(5), 499–508.
17- Ahmed, A.H. (2007): Diversity of Platinum-Group Minerals in Podiform Chromitites of the Late Proterozoic Ophiolite, Eastern Desert, Egypt. Genetic Implications. Ore Geology Reviews 32, 1–19.
18- Ahmed, A.H., Arai, S., Yasser, M.A., Ikenne, M. (2008): Platinum-group elements distribution and spinel composition of podiform chromitites and associated rocks of the Neoproterozoic Bou Azzer ophiolite, Anti-Atlas, Morocco. Journal of African Earth Science (in press).
19- Arai, S., Ahmed, A.H., Sabah, I.K., Shimizu, Y. (2008): Chromitite and peridotite from Rayat, northeastern Iraq, as fragments of a Tethyan ophiolite. Island Arc (in press).
20- Ahmed, A.H., Helmy, H.M., Arai., S. (2008): Magmatic unmixing in spinel from Late Precambrian Concentrically-Zoned Mafic-Ultramafic Intrusions, Eastern Desert, Egypt. Lithos 104, 85-98.
22. Ahmed, A.H., Arai, S., Ikenne, M. (2008): Mineralogy and mineral paragenesis of Co-Ni arsenide deposits of Bou Azzer, Anti-Atlas, Morocco. Economic Geology (in press).
II. Conferences Presentations
1- Ahmed, A.H. and Arai,S. (1999): Pan African (Proterozoic) Chromitite Deposits and Associated Ultramafic Rocks of the Eastern Desert, Egypt. In: Japan Earth and Planetary Science Joint Meeting (June, 8 - 11, 1999)(Abstract).
2- Ahmed, A.H. and Arai, S. (2000): Petrology and origin of the chromite deposits in the mantle section of the Northern Oman ophiolites. In: Japan Earth and Planetary Science Joint Meeting (June, 25 - 29, 2000)(Abstract).
3. Attia A.K.M., Boulis, S.N., Ahmed A.H., Hilmy M.E., Garuti G. & Zaccarini F. (2000): The Precambrian chromites of the Eastern Desert (Egypt): chromite mineral chemistry. In: Applied Mineralogy, Rammlmair et al. (eds), Balkema, Rotterdam, 259-262.
4- Ahmed, A.H. and Arai, S. (2001): Petrology and origin of chromitite deposits in the mantle section of the northern Oman ophiolite: Evidence from the Platinum-Group Elements Mineralization. In: International Conference of Geology of Oman (January, 12 - 16, 2001) (Abstract).
5- Ahmed, A. H. and Arai, S. (2002): Platinum-Group Elements Geochemistry in Podiform Chromitites and Associated Peridotites of the Precambrian Ophiolite, Eastern Desert, Egypt. 9th International Platinum Symposium, Jul. 21 - 25, 2002, Montana, Billings, USA (Extended abstract-PDF file).
6- Ahmed, A. H., Kelemen, P., Arai, S. and Hart. S. (2002): Osmium Isotope Systematics of Platinum-Group Minerals in the Proterozoic and Phanerozoic Ophiolitic Chromitites: Implications for Chromitite Genesis. Fourth International Workshop on Orogenic Lherzolites and Mantle Processes, Samani (Hokkaido, Japan), August 26 - September 3, 2002 (Abstract).
7- Ahmed, A.H. and Arai, S. (2003): Platinum-group elements mineralogy of late Proterozoic podiform chromitites from the Eastern Desert of Egypt: A preliminary result. In: 7th Biennial SGA Meeting, 24 - 28 August, 2003, Athenis, Greece (Extended abstract-PDF file).
8- Mondal, S.K., Ripley, E.M., Li, C., Ahmed, A.H., Arai, S., Liipo, J., and Stowe, C. (2003): Oxygen isotopic compositions of Cr-spinels from Archean to Phanerozoic chromite deposits. 13th V.M. Goldschmidt Conference, 7-12 September, 2003, Kurashiki-Sakuyo University, Kurashiki, Japan (Abstract).
9- Ahmed, A.H. and Arai, S. (2003): Overview of platinum-group elements (PGE) concentrations in the mantle section of the Proterozoic ophiolite, Egypt, and Phanerozoic ophiolite, Oman. 2003 GSA Annual Meeting & Exposition, 2-5 November 2003, Seattle, USA (Abstract).
10- Ahmed, A.H. and Arai, S. (2004): Field observations and petrological characteristics of the PGE-rich and PGE-poor chromitites: Guide for PGE exploration. IGCP 479 Hong Kong Workshop, Recent Advances in Magmatic Ore Systems in Mafic-Ultramafic Rocks. 14-15 December 2004, Hong Kong (Abstract).
11- Ahmed, A.H., Arai, S., Yasser, M.A., Rahimi, A.L. and Gahlan, H.A. (2005): Distribution of Cu, Ni, Au and PGE in the mantle Section of the Neoproterozoic Bou-Azzer Ophiolite, Anti-Atals, Morocco: Preliminary Results. 10th INTERNATIONAL PLATINUM SYMPOSIUM AUGUST 7 - 11, 2005 ‘Platinum-Group Elements – from Genesis to Beneficiation and Environmental Impact’ (Extended abstract).
12- Helmy, H.M., Ahmed, A.H., Kagami, H. and Arai, S. (2005): Sm/Nd and platinum-group element geochemistry of a late-Precambrian Alaskan-type complex from the Eastern Desert of Egypt. 10th INTERNATIONAL PLATINUM SYMPOSIUM AUGUST 7 - 11, 2005 ‘Platinum-Group Elements – from Genesis to Beneficiation and Environmental Impact’ (Extended abstract).
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