Article
 

Age of the Batoka basalts, norther Zimbabwe, and the duration of Karoo Large Igneous Province magmatism

Público Deposited

Conteúdo disponível para baixar

Baixar PDF
https://ir.library.oregonstate.edu/concern/articles/g158bj82p

Descriptions

Attribute NameValues
Creator
Abstract
  • Analysis of the Bakota basalts exposed in the Zambezi Gorge some 40 km east of Victoria Falls characterizes them as high Fe, moderately high Ti, and low K, P, and Zr tholeiites. The ⁴⁰Ar-³⁹Ar age determinations are tightly clustered at 180-179 Ma. All of the lavas that were samples have normal paleomagnetic polarity, and the corresponding pole position is 63.9°N, 260.6°E, A₉₅ = 14.9°. In South Africa, Lesotho, and Namibia the vast majority of Karoo basalts were extruded at 183 ± 1 Ma with some as young as 179 Ma [Duncan et al., 1997]. Paleomagnetic and geochemical correlation of the ~179 Ma rocks between Zimbabwe and Lebombo supports the conclusion that the age difference is real and hence confirms the estimates of ~ 5 Myr for the duration of emplacement of the Karoo Large Igneous Province.
  • Keywords: Large igneous provinces, Karoo, Geochronology, Paleomagnetism
Resource Type
DOI
Date Available
Date Issued
Citation
  • Jones, D. L., R. A. Duncan, J. C. Briden, D. E. Randall, and C. MacNiocaill, 2001. Age of the Batoka basalts, northern Zimbabwe, and the duration of Karoo Large Igneous Province magmatism, Geochem. Geophys. Geosyst., vol. 2, Paper number 2000GC000110
Journal Title
Journal Volume
  • 2
Declaração de direitos
Publisher
Language
Replaces
ISSN
  • 1525-2027

Relações

Parents:

This work has no parents.

Itens

Miniatura Título Data de carga Acesso Ações
file details Jones_et_al_Geochem_Geophys_Geosyst_2001.pdf 2017-07-21 Público Baixar