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RAPAKIVI GRANITES, SOUTH-GREENLAND - HYDROTHERMAL ALTERATION OF IGNEOUS LAYERING

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Author(s)

A A FINCH, R J REAVY, T N HARRISON, P E BROWN

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Abstract

Igneous layering is developed in the Proterozoic rapakivi granite suite of South Greenland in an area on the south-easternmost coast of the island of Angnikitsoq. The layering at this locality is unusual in that it is defined by interstitial phases. We suggest that large-scale hydrothermal alteration has converted a fine-grained pyroxene cumulate, in which original cumulate pyroxenes occurred in the interstices between larger feldspars, to interstitial biotite and green amphibole.

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Details

Original languageEnglish
Pages (from-to)739-742
Number of pages4
JournalJournal of the Geological Society
Volume147
Publication statusPublished - Sep 1990

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