After he got my PhD in 1995 on the mineralogy of precious metals in volcanogenic massive sulfide deposits in the Eastern Desert of Egypt, he focused my research on the petrology of ore deposits and the host rocks. Early in my carrier, he studied the mineralogy of gold deposits, volcanogenic massive sulfide deposits, Cu-Ni sulfide deposits and the mineralogy of platinum-group elements. Because most of the studied deposits are magmatic in origin, it was important also to study the petrology of the host rocks. These early publications appeared in high lass international journals.

Because the descriptive approaches to ore petrology alone are not sufficient to understand the genetic aspects of sulfide mineralizations, he started in 2004 my first experimental studies. He focused on the role of semimetals (As, Sb, Te, Bi) in controlling the behavior of platinum-group elements (PGE). These experimental studies helped understanding the genesis of magmatic Cu-Ni-PGE deposits. His greatest contribution to science and ore petrology research so far is my study on the stability of nanophases of noble metals at magmatic temperature in sulfide melts. This work was published in Nature Communications, the online version of Nature. In this contribution. Recently he is experimentally investigating how Au gold and silver are deposited from hydrothermal fluids. he run experiments on the deposition of gold and silver on the surface of sulfides in conditions similar to conditions at 600 m depth in Earth. His publications are highly valued by the international scientific communities where they were cited more than 1400 citations. he got several grants and research prizes, the most prestigious one is the Georg Forster Research Award from the Alexander von Humboldt Foundation in the year 2018. Currently, he is the Secretary of the Commission on Ore Mineralogy of the International Mineralogical association.

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