Australia: The Land Where Time Began

A biography of the Australian continent 

Siberian Flood Basalt Province Doubled - West Siberian Basin 40Ar/39Ar Dates

During Permo-Triassic times basaltic volcanism occurred over a wide area in the region of the West Siberian Basin, Central Russia. A recently obtained date using the 40Ar/39Ar method of 249.4 ± 0.5 Ma from plagioclase grains from deep bore holes in the basin indicate when the basalts were erupted. This date is synchronous with the bulk of the Siberian Traps that were erupted on the Siberian Platform further to the east. The basalts in the West Siberian Basin are confirmed to be part of the Siberian Traps by the age and geochemical data, which doubles the size of the volcanic province as a whole. The link between the volcanism and the mass extinction event at the close of the Permian is strengthened by the increased area of volcanism.

 

Sources & Further reading

  1. Reichow, Marc K., Andrew D. Saunders, Rosalind V. White, Malcolm S. Pringle, Alexander I. Al'Mukhamedov, Alexander I. Medvedev, and Nikolay P. Kirda. "40ar/39ar Dates from the West Siberian Basin: Siberian Flood Basalt Province Doubled." Science 296, no. 5574 (June 7, 2002 2002): 1846-49.

 

Author: M. H. Monroe
Email:  admin@austhrutime.com
Last Updated 26/06/2013
Home
Journey Back Through Time
Geology
Biology
     Fauna
     Flora
Climate
Hydrology
Environment
Experience Australia
Aboriginal Australia
National Parks
Photo Galleries
Site Map
                                                                                           Author: M.H.Monroe  Email: admin@austhrutime.com     Sources & Further reading