The northern extension of the Semailophiolite in the UAE is dominated by tectonic mantle peridotites and gabbros. The peridotites are mostly harzburgites with little lherzolites, and contain various intermittentveins, dikes and pods. These veins, dikes and pods can be divided into three rock categories: the ultramafic group that includes dunites, chromitites and pyroxenites, the granitic dikes, and carbonate veins. Occurrences of these bodies are explicit and ubiquitous, but their distribution throughout the sequence is not consistent. Pyroxenites, chromitites, and granites occur in the upper half of the sequence, but are more pronounced and dominant close to the transition zone. Dunites pods and carbonate veins can be found at different stratigraphic levels. The northern extension of the Semailophiolite in the UAE is dominated by tectonic mantle peridotites and gabbros. The peridotites are mostly harzburgites with little lherzolites, and contain various intermittentveins, dikes and pods. These veins, dikes and pods can be divided into three rock categories: the ultramafic group that includes dunites, chromitites and pyroxenites, the granitic dikes, and carbonate veins. Occurrences of these bodies are explicit and ubiquitous, but their distribution throughout the sequence is not consistent. Pyroxenites, chromitites, and granites occur in the upper half of the sequence, but are more pronounced and dominant close to the transition zone. Dunites pods and carbonate veins can be found at different stratigraphic levels.