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Spinel lherzolites from Xalapasco de la Joya, San Luis Potosi, SLP, Mexico

Published online by Cambridge University Press:  05 July 2018

George M. Greene  and
John C. Butler
George M. Greene
Affiliation:
Monsanto Company, Houston, Texas 77056
John C. Butler
Affiliation:
Department of Geology, University of Houston, Houston Texas 77004
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Summary

Ejecta associated with the Xalapasco de la Joya maar 33 km northeast of San Luis Potosi, SLP, Mexico, contain a diverse assemblage of nodules of postulated lower-crust/upper-mantle origin. Spinel lherzolites constitute the most abundant group of nodules and display chemical evidence that crystallization or equilibration took place at temperatures and pressures consistent with upper mantle genesis. Estimated equilibration temperatures and pressures range from 825 to 1025 °C and 7 to 19 kb.

Type
Research Article
Information
Mineralogical Magazine , Volume 43 , Issue 328 , December 1979 , pp. 483 - 486
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1979

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