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Chemical correlation of Moinian rocks in the northern Highlands of Scotland

Published online by Cambridge University Press:  01 May 2009

J. A. Winchester ,
R. St J. Lambert  and
J. G. Holland
J. A. Winchester
Affiliation:
Department of Geology, University of Keele, Keele, Staffs, England ST5 5BG
R. St J. Lambert
Affiliation:
Department of Geology, University of Alberta, Edmonton, Alberta, CanadaT6G 2E3
J. G. Holland
Affiliation:
Department of Geological Sciences, Science Laboratories, South Road, Durham, England DHI 3LE
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Summary

Comparison is made between the semipelitic and psammitic schists of the Morar and Glenfinnan Division in their type areas and the succession in the Fannich district of Northern Ross-shire. The tentative lithological correlation of the Morar Pelite with the Sgurr Mor Pelite is confirmed, while the Meall an t-Sithe Pelite and the semipelites of the Glenfinnan Division likewise have a similar geochemistry. In establishing these similarities, ratios involving Sr, Nb, Y, Zr and P2O5 have been found to be most useful, particularly Sr/Y. Other ratios (Ca/Y, K/Rb, K2O/(Na2O+CaO) and K/Ba) can also yield useful information regarding correlation and sedimentary history. Sr/Y decreases stratigraphically upwards in these successions and also towards the north east, suggesting a palaeogeography for the Morar Division involving increasing remoteness from the source area with time and in a northeasterly direction.

Type
Articles
Information
Geological Magazine , Volume 120 , Issue 2 , March 1983 , pp. 165 - 174
Copyright
Copyright © Cambridge University Press 1983

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References

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