New thermoluminescence age estimates for the Nyos maar eruption (Cameroon Volcanic Line).

ABSTRACT: Nyos maar is located in the Cameroon Volcanic Line and generates a multitude of primary and secondary hazards to the local population. For risk assessment and hazard mitigation, the age of the Nyos maar eruption provides some vital information. Since previous dating efforts using a range of techniques resulted in vastly varying eruption ages, we applied thermoluminescence (TL) methods to obtain independent and direct chronological constraints for the time of maar formation. Target minerals were granitic quartz clasts contained in pyroclastic surge deposits. Thermoluminescence plateau results prove that heat and/or pressure during the phreatomagmatic eruption was sufficient to reset the inherited luminescence signal of granitic bedrock quartz. Parallel application of three TL measurement pr

SUBMITTER: Schmidt C 

PROVIDER: S-EPMC5448780 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature