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An interesting occurrence of lawsonite in glaucophane-bearing rocks from New Caledonia

Published online by Cambridge University Press:  14 March 2018

Germaine A. Joplin
Germaine A. Joplin*
Affiliation:
Department of Geology, University of Sydney
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Extract

The writer has recently described a small collection of glaucophane- schists from the Diahot valley and the north-east coast of New Caledonia (Jensen, 1936), and four of these contain lawsonite.

Lacroix (1897) has recorded lawsonite from New Caledonia, but the occurrence seems worthy of further mention as in two cases the lawsonite is found to be pseudomorphing plagioclase in doleritic rocks which show a relict ophitic fabric. So far as the writer is aware, such an occurrence of lawsonite pseudomorpbing felspar has not been recorded, though Lacroix figures a glaucophane-schist from Corsica which suggests this structure. The other two lawsonitebearing rocks from New Caledonia seem to have been coarse-grained plutonic rocks and probably never had an ophitic fabric.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 24 , Issue 157 , June 1937 , pp. 534 - 537
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1937

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References

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