Abstract
Abstract Variable single and/or swarms of post-granitic dikes are widespread at Gabal Serbal, Southwestern Sinai, Egypt. The present article aims to identify and discriminate these multiphase dikes through detailed geological, petrographical, and geochemical examinations. These dikes are classified into two subphases: (1) acidic dikes (porphyritic dacite, microgranite, granophyre, and alkaline granophyre dikes); and (2) basic dikes (basalt and dolerite dikes). They range from vertical or steeply inclined bodies, 0.5–15 m wide, pink to black color, and NE–SW to N–S directions. Acidic dikes with different mineralogical constituents have medium to high k-characters, originating from calc-alkaline magma and extruded in a volcanic arc environment. In contrast, basic dikes have medium k-characters, originating from tholeiitic magma and developing within a plate environment. Basic dikes are enriched with opaque minerals, where the basaltic dike contains iron oxides (magnetite and hematite), such as apatite in addition to copper minerals. Dolerite dike comprises magnetite, titanomagnetite, and pyrite.
Highlights
The basement rocks of Sinai represent the northwestern extremity of the Arabian-Nubian Shield (ANS) separated from the main block by the Gulf of Suez and the Gulf of Aqaba
The present study aims to detect the petrography and geochemistry analyses in addition to determine some of the economic mineralization associated with the different dikes at the Gabal Serbal area, Southwestern Sinai, Egypt
The examined area is split by prominent clusters of postgranitic dikes, which create separate and lengthy subparallel dike swarms
Summary
The basement rocks of Sinai represent the northwestern extremity of the Arabian-Nubian Shield (ANS) separated from the main block by the Gulf of Suez and the Gulf of Aqaba. These rocks were formed as a result of complex events of subduction, accretion, and extension during Pan African times [1,2]. Geology is considered one of the most important and best sciences in ancient and modern times. It helps discover some of the geological secrets hidden in deep burials and different rocks containing some minerals that have economic feasibility [4]. Radioactive mineralization linked with red, black, and jasperoid silica veins exhibits apparent brilliant yellow secondary uranium-bearing minerals [9–12]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
