Bol. Soc. Geol. Mexicana XXXV: 1-6, 1974.

Nota Preliminar Sobre las Eclogíticas de Acatlán, Puebla.

http://dx.doi.org/10.18268/BSGM1974v35n1a1

Fernando Ortega-Gutiérrez

Instituto de Geología, UNAM Apartado Postal 70-296 México 20, D. F.

Abstract

Eclogitic rocks were found for the first time in México in several places between Acatlán and Tehuitzingo. The rocks are part of a seemingly ophiolitic complex repeatedely metamorphosed and deformed during the Paleozoic. Microprobe study of the eclogitic minerals permitted the classification of these eclogites within a group associated with metamorphic regimes in ancient subduction zones. The approximate physical conditions obtained for the eclogitización fromthe jadeite content of omphacite and from the mineral parageneses were 11-12 kilobars and 500-550 °C.