High-precision U–Pb geochronology of Phanerozoic large igneous provinces - Volcanism and Global Environmental Change - page 57

40 Ar − 39 Ar

SIMS U−Pb

(a)

Jourdan et al. , 2009
Nomade et al. , 2007
Hames et al. , 2000
Beutel et al. , 2005
Marzoli et al. , 2011
Knight et al. , 2004

Rossi et al. , 2003

190

TIMS U−Pb

Dunning & Hodych, 1990
Hodych & Dunning, 1992
Schoene et al. , 2010
Blackburn et al. , 2013

192

194

196

198

200

202

B

204

Ar data re-reduced using Renne et al. , 2010 & 2011.
Uncertanties include those derived from decay constants

206

(b)

200

T Triassic-Jurassic boundary

HTQ-L.I.
HTQ-I
HTQ-U
HFQ
LTQ
ON

201

End-Triassic extinction

202

40 Ar 39 Ar and U

Figure 4.6 (a) Comparison between Pb zircon data for

- -

CAMP-related basalt flows and intrusions from the eastern USA and Morocco.

The relatively large uncertainties associated with 40 Ar

39 Ar or SIMS U

Pb data

- -

provides insuf cient age resolution for clarifying the relationship between

CAMP, the end-Triassic extinction and the biologic recovery or Triassic

- Jurassic

boundary. (b) High-precision zircon U Pb dates place the earliest CAMP erup-

tions within uncertainty of the end-Triassic extinction. A black and white version
of this

-

figure will appear in some formats. For the colour version, please refer to
the plate section .

Figure 4.5 ( cont. ) end-Permian mass extinction (Burgess et al ., 2014 ). Data from
(Duncan et al ., 1997 ; Kamo et al ., 2003 ; Jourdan et al ., 2008 ; Reichow et al .,
2009 ; Svensen et al ., 2010 ; Marzoli et al ., 2011 ; Baksi, 2014 ). (b) Evolution of
the age of the Permian

39 Ar plateau dates
from (Renne et al ., 1995 ; Reichow et al ., 2009 ) and weighted mean
206 Pb

40 Ar

- Triassic boundary since 1995. -

238 U dates from (Bowring et al ., 1998 ; Mundil et al ., 2001 ; 2004 ;Shen
et al ., 2011 ; Burgess et al ., 2014 ).

-