Heterogeneous excess argon and Neoproterozoic heating in the Usagaran Orogen, Tanzania, revealed by single grain 40Ar/39Ar thermochronology

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Heterogeneous excess argon and Neoproterozoic heating in the Usagaran Orogen, Tanzania, revealed by single grain 40Ar/39Ar thermochronology

Existing tectonic models for the evolution of the Usagaran Orogen place much significance on Palaeoproterozoic K Ar and Rb Sr ages. Laser 40Ar/39Ar data from single mica grains from the Isimani Suite near the western margin of the orogen indicate that excess 40Ar is common in micas and this casts co...

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Bibliographic Details
Main Authors:	Reddy, Steven, Collins, Alan, Buchan, Craig, Mruma, A.
Format:	Journal Article
Published:	Elsevier 2004
Subjects:	Usagaran Orogen Palaeoproterozoic Ar laser microprobe 40Ar/39Ar geochronology East African Orogen Deformation
Online Access:	http://www.sciencedirect.com/science/journal/1464343X http://hdl.handle.net/20.500.11937/9535

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