Time relationship between emplacement, fabric development and regional deformation of the Manchi granitic pluton (western - Cameroon domain)-an integrated AMS, CPO and microstructural investigation

In this study, we integrate anisotropy of magnetic susceptibility (AMS) and microstructural data including quartz crystallographic preferred orientation (CPO) from SEM-EBSD from the Manchi Pan-African granitic pluton with the objective of deciphering the time relationship between fabric development,...

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Bibliographic Details
Published in:Journal of structural geology 2022-07, Vol.160, p.104619, Article 104619
Main Authors: Bella Nke, B.E., Njanko, T., Mamtani, M.A., Rochette, P., Njonfang, E.
Format: Article
Language:English
Subjects:
AMS
Cameroon
CPO
Earth Sciences
Granite
Microstructures
Sciences of the Universe
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Summary:In this study, we integrate anisotropy of magnetic susceptibility (AMS) and microstructural data including quartz crystallographic preferred orientation (CPO) from SEM-EBSD from the Manchi Pan-African granitic pluton with the objective of deciphering the time relationship between fabric development, emplacement and regional tectonics. The Manchi pluton, located in the western Cameroon domain of the Pan-African Fold Belt of Central Africa in Cameroon, is made of hornblende-biotite granite (HBtG), biotite granite (BtG) and protomylonites of HBtG. The pluton intruded the high grade country rocks made of banded gneiss and amphibolites. AMS of the pluton is controlled dominantly by paramagnetic phases such as, Fe-bearing silicates (biotite and hornblende). This is inferred from the low Km values (
ISSN:0191-8141
1873-1201
DOI:10.1016/j.jsg.2022.104619