The Inishdawros Meta-Peridotite, Callow, Ballyconneely, Connemara, Western Ireland

A. A. Ahmed and B. E. Leake
Department of Geology, Assiut University, Egypt
Department of Geology, University, Glasgow G12 8QQ

Summary: The chemistry and petrography of a meta-ultrabasic lens containing peridotite with poikilitic pyroxenes and hornblende, both of probable igneous origin, are given. The body also contains feldspathic-bearing hornblende meta-gabbros and is a tectonic fragment in hornblende-plagioclase rock belonging to the same Errismore intrusion. Chemical analyses fail to discern any appreciable systematic differentiation trend across the body despite modal variation to hornblende plagioclase layers. The high Niggli mg near the structural bottom of the intrusion suggests that this part of the Errismore intrusion is right way up, contrary to a previous suggestion.

Mineralogical Magazine; March 1978 v. 42; no. 321; p. 69-74; DOI: 10.1180/minmag.1978.042.321.08
© 1978, The Mineralogical Society
Mineralogical Society (