epidotization

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epidotization

[‚ep·ə‚dōd·ə′zā·shən]

(geology)

The introduction of epidote into, or the formation of epidote from, rocks.

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Porphyrite

References in periodicals archive ?

However, it should be mentioned that volcanic Suursaari quartz porphyries have undergone intensive hydrothermal alteration (albitization, epidotization, etc.

Using a titanium-in-quartz geothermometer for crystallization temperature estimation of the Palaeoproterozoic Suursaari quartz porphyry/Titaan-kvartsis geotermomeetria meetodi rakendamine paleoproterosoilise Suursaare kvartsporfuuri kristalliseerumistemperatuuride maaramisel

Graves (1990) further documented the variety of rock types and noted the high degree of epidotization, quartz veining, and cataclasis, as well as the presence of mylonitic rocks.

The Cape Porcupine Complex, northern mainland Nova Scotia--no longer a geological orphan

The new type of alteration consists of epidotization of up to 70 percent of the rock, over core lengths up to several tens of metres, and silicification up to 100 percent of the rock over core lengths of one to several metres.