Mineralogical and Geochemical Investigation of the Basaltic Rocks along Kharrouba Fault at Qasr Al Hallabat Area, Northeast Jordan

Kharrouba basaltic fault rocks (KBR) were investigated aiming to understand their mineralogy, petrography, geochemistry and Petrogenesis features. The basalt rocks occupy 18% of Jordan's area. The basalt is associated with continental rifting and is associated with magmatism and section activities that have produced melted generation into the fissure system. The main objective of this study is to investigate the of the Basalt rocks along kharrouba basaltic dyke Qasr Al_ Hallabat Area to investigated Mineralogy, Petrology, Geochemistry and Petrogenesis of the inter-continental basaltic flow. The study was conducted in the northeastern part of Jordan. Eighteen representative rock samples were selected for both geochemical and petrographic analysis from several sites in the study area. Petrographic characteristics were analysed by optical microscopy after preparation of thin sections, for representative rock samples, which show that all basalt samples have minerals comprising: olivine, clinopyroxene (augite), plagioclase (labradorite), opaque and some secondary minerals such as (Iddingsite). Normative mineralogy by using CIPW norm showed that the basalt samples were dominated by olivine, Diopside, hematite, apatite, sphene, anorthite, albite, orthoclase and nepheline. The basalt can be normatively classified as alkali olivine basalt. Some textures that may be evident on microscopic examination are seriate, such as Porphyritic, vesicular, glomeroporphyritic, intergranular, embayment, trachytic, zoning olivine and ophitic to subophitic texture. X-ray Fluorescence (XRF) was used for whole rock major elements (SiO2, TiO2, Al2O3, Fe2O3, MnO, MgO, CaO, Na2O, K2O and P2O5 in wt%) and trace elements (Cr, Sr, Zr, Ni, Ba in ppm were selected in some samples). Geochemical analysis reveals that the basalt is alkaline and belongs to the sodic series. The normalised trace element diagrams suggest that A product of the asthenosphere part of the mantle at >100km depth. The geochemical variation trends of A basaltic samples, supposing that the composition of these magmas has been influenced by fractional crystallisation without clear evidence for crustal contamination. These findings contribute to understanding the mantle source characteristics and magmatic evolution in the context of the Arabian Plate intraplate volcanism.