[meteorite-list] New Paper on Permian-Triassic Extinction

[Paul H.]

Dear Friends,

There is a new paper about the Permian-Triassic extinction in 
Chemical Geology. It is:

Brookfield, M. E., J. G. Shellnutt, L .Qi, R. Hannigan, G. M. Bhat ,
and P. B. Wignall, 2010, Platinum element group variations at 
the Permo–Triassic boundary in Kashmir and British Columbia 
and their significance. Chemical Geology. vol. 272, pp. 12-19.

the abstract is at:

"http://dx.doi.org/10.1016/j.chemgeo.2010.01.008

The paper concludes that the sources of the platinum element group 
anomalies found at and near the Permian-Triassic boundary

are “either contemporaneous seawater or older basaltic volcanics
associated with the sections and the PGE were precipitated by 
a possible combination of development of anoxia in the oceans 
and post-depositional redistribution.”

A related paper is:

Brookfield, M. E., R. J. Twitchett and C. Goodings, 2003, 
Palaeoenvironments of the Permian–Triassic transition sections 
in Kashmir, India. Palaeogeography, Palaeoclimatology, 
Palaeoecology. vol. 198, no. 3-4, pp. 353-371.

http://dx.doi.org/10.1016/S0031-0182(03)00476-0

Yours,

Paul H.