Abstract
Peridotite ultramafic mantle xenoliths are occurring abundantly in the Harrat Al-Shaam basaltic province. Jabal Remah volcano is located in the Jordanian parts of the plateau and contains considerable amounts of mantle xenoliths within its pyroclastic successions. Mineralogical investigations show that the xenoliths are mostly of the spinel lherzolite type, which are characterized by a protogranular texture. Modally, the xenoliths are composed of olivine (55-65%), orthopyroxene (12-16%), clinopyroxene (10-15%) and spinel (~ 5%). The xenoliths are classified as Type I and belong to the Cr-diopside group. They are characterized by a high content of MgO (42.1-43.2%), Cr (2465-2538 ppm) and Ni (2196-2301 ppm). Three selected mantle-xenolith samples were analyzed for their magnetic characteristics. They were found to behave similarly in their ferrimagnetic phase, as indicated by their narrow hysteresis curves and because they never reach saturation even at high applied field. They exhibit ferrimagnetic hystertesis curves similar to world known mantle xenoliths, which is due to the presence of Fe in the form of oxides.
Highlights
Magnetic investigations regarding natural substances become a wide and interesting field
In crustal xenoliths Fe-Ti oxides cause the magnetization, while upper mantle xenoliths are composed of spinel with little Fe+3 and ilmenite
It is vital to determine the magnetic characteristics of crust and mantle rocks, which can be obtained from xenoliths
Summary
Magnetic investigations regarding natural substances become a wide and interesting field. Spinel lherzolite xenoliths from the NE-basaltic plateau were investigated for their chemical and magnetic characteristics. It is considered to be one of the largest alkali olivine basalt plateaus globally[13,14] studied the oxidation of olivine in lherzolitic xenoliths from NEJordan using petrographic and Moesbauer methods. They showed that water oxidized the Fe and takes the Mg and Si out. Jabal Remah lies in the Jordanian part of Harrat AlShaam which is locally known as Jordanian Harrat or Harra El-Jabban[15] about 15 km north of the MafraqBaghdad road and 5 km south of the Syrian-Jordan border Fig. 1.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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.
