Lyell Collection
Journal of the Geological Society
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Full Text (PDF)
Right arrow References
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow Request Permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Kirby, G. A.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation
Journal of the Geological Society; 1984; v. 141; issue.1; p. 53-59;
DOI: 10.1144/gsjgs.141.1.0053
© 1984 Geological Society of London

Article

The petrology and geochemistry of dykes of the Lizard Ophiolite Complex, Cornwall

G. A. Kirby

Dykes from the coastal section of the Lizard ophiolite, SW England, have been analysed for both major and trace elements. The dykes vary from fresh olivine dolerites to lower amphibolite grade metadolerites. All are basaltic and tholeiitic and possess broadly oceanic characteristics.

Three magma groupings can be defined geochemically on the basis of trace element contents, particularly rare earth elements and P/Y ratios. These magma groupings are thought to have been generated by differing degrees of partial melting and from differing source rocks. Each group is thought to have undergone fractional crystallization. The spatial and suggested temporal separation of these groups supports a pulsatory magma chamber model for the spreading centre at which the Lizard ophiolite developed.





This article has been cited by other articles:


Home page
 Journal of the Geological SocietyHome page
H. A. I. Sandeman, H. A. I. SANDEMAN, A. H. CLARK, D. J. SCOTT, and J. G. MALPAS
The Kennack Gneiss of the Lizard Peninsula, Cornwall, SW England: commingling and mixing of mafic and felsic magmas accompanying Givetian continental incorporation of the Lizard ophiolite
Journal of the Geological Society, 2000; 157: 1227 - 1242.
[Abstract] [Full Text] [PDF]

Home page
 Journal of the Geological SocietyHome page
H. A. SANDEMAN, A. H. CLARK, M. T. STYLES, D. J. SCOTT, J. G. MALPAS, and E. FARRAR
Geochemistry and U-Pb and 40Ar-39Ar geochronology of the Man of War Gneiss, Lizard Complex, SW England: pre-Hercynian arc-type crust with a Sudeten-Iberian connection
Journal of the Geological Society, 1997; 154: 403 - 417.
[Abstract] [PDF]

Home page
 Scottish Journal of GeologyHome page
D. Flinn
New evidence that the high temperature hornblende-schists below the Shetland ophiolite include basic igneous rocks intruded during obduction of the 'cold' ophiolite
Scottish Journal of Geology, 1993; 29: 159 - 165.
[Abstract] [PDF]

Home page
 Geological Society, London, Special PublicationsHome page
P. A. Floyd, R. Shail, B. E. Leveridge, and W. Franke
Geochemistry and provenance of Rhenohercynian synorogenic sandstones: implications for tectonic environment discrimination
Geological Society, London, Special Publications, 1991; 57: 173 - 188.
[Abstract] [PDF]

Home page
 Journal of the Geological SocietyHome page
R. P. BARNES and J. R. ANDREWS
Upper Palaeozoic ophiolite generation and obduction in south Cornwall
Journal of the Geological Society, 1986; 143: 117 - 124.
[Abstract] [PDF]

Home page
 Journal of the Geological SocietyHome page
R. P. Barnes
Possible Lizard-derived material in the underlying Meneage Formation
Journal of the Geological Society, 1984; 141: 79 - 85.
[Abstract] [PDF]