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

From: Paul H. <oxytropidoceras_at_meteoritecentral.com>
Date: Fri, 26 Mar 2010 13:06:22 -0500
Message-ID: <20100326140622.ZGEDN.1075263.imail_at_eastrmwml36>

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.
Received on Fri 26 Mar 2010 02:06:22 PM PDT