Research Output Details
Mineralogy and geochemistry of fine-grained Dahab stream sediments, Southeastern Sinai, Egypt: emphasis on the intergrowths of Fe–Ti oxides
Published
83
Abstract
Mineralogical and geochemical characteristics of stream sediments collected from 30 stations in the Dahab-Wadi Kid area (southeastern Sinai, Egypt) are presented. The studied sediments contain considerable amounts of heavy minerals, including abundant Fe–Ti oxides, with up to 25.94% index figure that measures the relative abundance of heavy minerals to light minerals. Immaturity of the sediments and nature of Fe–Ti oxide
intergrowths, in addition to some non-opaque heavy minerals, indicate multiple provenances with contributions from a variety of Neoproterozoic mafic to felsic intrusions. Appreciable amounts of heavy minerals are derived from schists that belong to the so-called Wadi Kid volcanosedimentary
group. Owing to the considerable contribution of the felsic intrusions represented by within-plate granites, the sediments are enriched in REE-bearing minerals (e.g., monazite, cerianite, La-cerianite and allanite), V-bearing thorite, zircon, and a ZrO2 phase.
intergrowths, in addition to some non-opaque heavy minerals, indicate multiple provenances with contributions from a variety of Neoproterozoic mafic to felsic intrusions. Appreciable amounts of heavy minerals are derived from schists that belong to the so-called Wadi Kid volcanosedimentary
group. Owing to the considerable contribution of the felsic intrusions represented by within-plate granites, the sediments are enriched in REE-bearing minerals (e.g., monazite, cerianite, La-cerianite and allanite), V-bearing thorite, zircon, and a ZrO2 phase.