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Volume :7 Issue : 1 1980      Add To Cart                                                                    Download

Geological and petrographical studies in the northern part of the Oman Mountains, northwest of Al-Fujairah, United Arab Emirates

Auther : MAMDOUH A. HASSAN AND JAWAD S. AL-SULAIMI

Nuclear Material Corporation, P.O. Box 98, Masaken Madinat Nasr, Nasr City, Cairo, Egypt, and Kuwait Institute for Scientific Research

 

ABSTRACT

 

Geological and petrographical studies have been carried out on ultramafic and gabbroic rocks and schists in an area covering about 100 km2 and lying about 10 km northwest of Al-Fujairah, in the United Arab Emirates. The ultramafic rocks are composed of variously serpentinised harzburgites and dunites. Three joint sets have been described in these rocks. Dykes and veins of magnesite, pegmatitic gabbro and serpentine asbestos are abundant in them. The ultramafic rocks overlie the schists with a thrust contact. The gabbroic rocks are dominantly layered and include gabbro, eucrite, troctolite, olivine gabbro, olivine norite and uralitised gabbro. Their contacts with the schists and the ultramafic rocks are fault contacts. Two types of schists are described: green schists and quartz schists. These were originally a sedimentary succession dominated by calcareous and dolomitic sediments containing appreciable amounts of pyroclastics and cherts and with smaller amounts of sandstones with calcareous impurities. The mineral assemblages of the schists indicate that they were metamorphosed in the green schist facies at its upper limit transitional to the amphibolite facies. Correlation of the rock units of the studied area with the rock units defined by previous workers in the Oman Mountains is given.

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