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  • 标题:Geology and petrography of Sabon Garin Kara and environs part of Malumfashi sheet 79 NE Nigeria
  • 本地全文:下载
  • 作者:Ahmed Abubakar Sarki ; Mohammed Yerima Kwaya ; Nasir Abdullahi Maiauduga
  • 期刊名称:Journal of Geology and Mining Research
  • 电子版ISSN:2006-9766
  • 出版年度:2019
  • 卷号:11
  • 期号:4
  • 页码:31-38
  • DOI:10.5897/JGMR2019.0318
  • 语种:English
  • 出版社:Academic Journals
  • 摘要:The study area is about 40 km2 that is (8 km 5 km) which is located in Gwarzo Local Government area of Kano State part of Malumfashi sheet 79NE which lies within Longitude E0757 '19.5" and E0800 '00" and Latitude N11 51 '30"andN1147"00. Major rock types identified include medium grained biotite-muscovite granite, coarse grained muscovite-biotite granites, quartz-syenite, and quartz-monzonites. Most of the crystals show subhedral to anhedral form and a perfect cleavage is somehow visible. The interference colours observed under cross-polarized light include blue, dark grey, light grey, some pinkish colour and brown colour which disappear upon the stage rotation. Albite and Carlsbad twinning are seen and used to identify the feldspars. Various structural features were observed with NE- SW trend which represents the final imprint of the Pan-African orogeny.
  • 关键词:Biotite; granite; cross-polarized; twinning
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