The geochemistry of the Alluvial topaz associated with the jurassic kwandonkaya granites in North-East Jos, Nigeria
100p
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| Formato: | Thesis |
| Idioma: | inglês |
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Obafemi Awolowo University, Ile Ife, Nigeria
2023
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| Acesso em linha: | https://ir.oauife.edu.ng/123456789/5239 |
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| _version_ | 1810764575765692416 |
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| author | Ajayi, Abiola Olanrewaju |
| author_facet | Ajayi, Abiola Olanrewaju |
| author_sort | Ajayi, Abiola Olanrewaju |
| collection | DSpace |
| description | 100p |
| format | Thesis |
| id | oai:ir.oauife.edu.ng:123456789-5239 |
| institution | My University |
| language | English |
| publishDate | 2023 |
| publisher | Obafemi Awolowo University, Ile Ife, Nigeria |
| record_format | dspace |
| spelling | oai:ir.oauife.edu.ng:123456789-52392023-05-13T18:12:26Z The geochemistry of the Alluvial topaz associated with the jurassic kwandonkaya granites in North-East Jos, Nigeria Ajayi, Abiola Olanrewaju Geology Mineral content Topaz Granite Texture Feldspars Petrographic studies Pneumatolytic phase Miqrolitic cavities Metals 100p Occurrences of topaz, associated with cassiterite mineralization within the Jurassic younger granite complex in Nigeria has been mentioned by several authors. This project reports the result of an integrated study of the geology, geochemistry, mineralogy and petrogenetic setting of the alluvial topaz found occurring within the kwandonkaya younger granite complex. The kwandonkaya granites which field mapping and petrographic studies show to be biotitegranites with slight textural variation most probably bear the euhedral topaz crystals in miarolitic cavities which inundate them. Two major varieties of topaz are found they are the 'colourless' and 'blue' types. Inclusions occurring within the crystals are mainly rutile rods and two phase fluid inclusions containing water and a gas. The associated minerals are cassiterite, quartz of four varieties, pottassic feldspars, flourite, micas and plagioclase. Magmatism in the complex was largely restricted to the pneumatolytic phase. A suggested geochemical prospecting method involves using the number of the miqrolitic cavities per unit area, this takes into account that a higher density is associated with greater mineralization hence a consequent enrichment of surrounding placers with gemstones and economic metals. 2023-05-13T16:27:51Z 2023-05-13T16:27:51Z 1986 Thesis https://ir.oauife.edu.ng/123456789/5239 en application/pdf Obafemi Awolowo University, Ile Ife, Nigeria |
| spellingShingle | Geology Mineral content Topaz Granite Texture Feldspars Petrographic studies Pneumatolytic phase Miqrolitic cavities Metals Ajayi, Abiola Olanrewaju The geochemistry of the Alluvial topaz associated with the jurassic kwandonkaya granites in North-East Jos, Nigeria |
| title | The geochemistry of the Alluvial topaz associated with the jurassic kwandonkaya granites in North-East Jos, Nigeria |
| title_full | The geochemistry of the Alluvial topaz associated with the jurassic kwandonkaya granites in North-East Jos, Nigeria |
| title_fullStr | The geochemistry of the Alluvial topaz associated with the jurassic kwandonkaya granites in North-East Jos, Nigeria |
| title_full_unstemmed | The geochemistry of the Alluvial topaz associated with the jurassic kwandonkaya granites in North-East Jos, Nigeria |
| title_short | The geochemistry of the Alluvial topaz associated with the jurassic kwandonkaya granites in North-East Jos, Nigeria |
| title_sort | geochemistry of the alluvial topaz associated with the jurassic kwandonkaya granites in north east jos nigeria |
| topic | Geology Mineral content Topaz Granite Texture Feldspars Petrographic studies Pneumatolytic phase Miqrolitic cavities Metals |
| url | https://ir.oauife.edu.ng/123456789/5239 |
| work_keys_str_mv | AT ajayiabiolaolanrewaju thegeochemistryofthealluvialtopazassociatedwiththejurassickwandonkayagranitesinnortheastjosnigeria AT ajayiabiolaolanrewaju geochemistryofthealluvialtopazassociatedwiththejurassickwandonkayagranitesinnortheastjosnigeria |