A Metamorphosed Pyroxenite at Nero Hill, Central Tanzania

H. W. Haslam and B. G. Walker
Institute of Geological Sciences, 64-78 Gray's Inn Road, London, W.C. 1, formerly Mineral Resources Division, Tanzania
Mineral Resources Division, P.O. Box 903, Dodoma, Tanzania

Summary: The pyroxenite of Nero Hill has been metamorphosed under relatively low water pressure at the centre and higher water pressure at the margins. Thus a central pyroxenite consisting of diopside, hypersthene, oligoclase, garnet, and a little hornblende grades outward into a hornblende-cummingtonite amphibolite.

Mineralogical Magazine; March 1971 v. 38; no. 293; p. 58-63; DOI: 10.1180/minmag.1971.038.293.07
© 1971, The Mineralogical Society
Mineralogical Society (www.minersoc.org)