Clay mineral reaction progress : the maturity and burial history of the Lias group of England and Wales

Kemp, S.J.; Merriman, R.J.; Bouch, J.E.. 2005 Clay mineral reaction progress : the maturity and burial history of the Lias group of England and Wales. Clay Minerals, 40 (1). 43-62. 10.1180/0009855054010154

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Abstract/Summary

The clay mineral assemblages and microtextures of a suite of mudrocks from the Lias Group of England and Wales indicate important regional differences in burial history. Samples from the northern Cleveland Basin are characterized by illite-smectite (I–S, 90% illite) and little carbonate whilst samples from the southern Worcester and Wessex basins contain less mature discrete smectite and are often calcite- and dolomite-rich. Lias Group rocks have been buried to 4 km in the Cleveland Basin but to <2 km in the Worcester and Wessex basins. Burial in the Cleveland Basin is deeper than previously estimated and does not need a local heating event. Illite- smectite (80% illite) detected in samples from the East Midlands Shelf suggests burial to 3 km, again deeper than previous estimates for this region.

Item Type:	Article
Identification Number/DOI:	10.1180/0009855054010154
Programmes:	BGS Programmes > Economic Minerals
ISSN:	0009-8558
Date made live:	15 Nov 2011 15:57
URI:	http://nora.nerc.ac.uk/id/eprint/15908

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