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Geochronology, Petrogenesis and Tectonic Implication of A-Type Granite from Zaranda (North-Central Nigeria)

  • Hafizullah Abba Ahmed
  • Lian-Xun WangEmail author
  • Chang-Qian Ma
  • Ibrahim Garba
  • Musa Bala Girei
  • Victor Ikechukwu Vincent
Chapter
Part of the Advances in Science, Technology & Innovation book series (ASTI)

Abstract

A-type granites were emplaced in Zaranda at 203 ± 1 Ma corresponding to Late Triassic. Petrologically, the A-type granite association includes syenite, quartz syenite and alkali granite of ferroan-alkalic composition. In Yb/Ta versus Y/Nb binary plots, they display certain characteristics typical of OIB derived A-type granites. The depletion in Ba, Sr, Ti and Eu indicates fractionation of feldspars, biotite, amphiboles and augite. The isotopic analysis of Zaranda, as drawn from a previously conducted study yielded lower 87Rb/86Sr values of 0.7048 and positive ɛNd(t) + 0.9. Overall, the above data proved to reveal that the Zaranda A-type granites were formed from assimilation fractional crystallization of OIB-like magmas, as derived from lithospheric mantle. Late Triassic crustal extension, preceding the opening of the Atlantic Ocean in Early Jurassic, was most probably the main trigger for the emplacement of such A-type granite suites, which ranks them within plate A-type granite sensu stricto.

Keywords

Zaranda OIB derived A-type granites Alkaline granites Nigerian younger granite Petrogenesis 

Notes

Acknowledgements

We acknowledge the National Natural Science Foundation of China (Grant: 41530211, 41502046) and the Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) (CUGCJ1711) for the financial support rendered for this work. The Society of Economic Geologists Inc. USA is sincerely acknowledged for fully funding the fieldwork for this study.

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Authors and Affiliations

  • Hafizullah Abba Ahmed
    • 1
    • 2
  • Lian-Xun Wang
    • 1
    Email author
  • Chang-Qian Ma
    • 1
  • Ibrahim Garba
    • 3
  • Musa Bala Girei
    • 1
    • 4
  • Victor Ikechukwu Vincent
    • 2
  1. 1.Faculty of Earth SciencesChina University of GeosciencesWuhanChina
  2. 2.Department of GeologyModibbo Adama University of TechnologyYolaNigeria
  3. 3.Department of GeologyAhmadu Bello UniversityZariaNigeria
  4. 4.Department of GeologyBayero UniversityKanoNigeria

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