Hydrothermal and metamorphic berthierine from the Kidd Creek volcanogenic massive sulfide deposit, Timmins, Ontario

J. F. Slack, Jiang Wei-Teh Jiang, D. R. Peacor, P. M. Okita

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

Berthierine, a 7 Å Fe-Al member of the serpentine group, occurs in the footwall stringer zone of the Archean Kidd Creek massive sulfide deposit, associated with quartz, muscovite, chlorite, pyrite, sphalerite, chalcopyrite, and local tourmaline, cassiterite, and halloysite. Petrographic and scanning electron microscopic (SEM) studies reveal different types of berthierine occurrences, including interlayers within the rims on deformed chlorite, intergrowths with muscovite and halloysite, and discrete coarse grains. This is the first reported occurrence of berthierine from volcanogenic massive sulfide deposits. Textural relations suggest that most of the berthierine formed as a primary hydrothermal mineral at relatively high temperatures (~350°C) in the footwall stringer zone, probably by the replacement of a pre-existing aluminous phase such as muscovite or chlorite. However, the intergrowth textures observed by SEM and TEM suggest that some of the berthierine originated by syn- or post-metamorphic replacement of chlorite. -from Authors

Original languageEnglish
Pages (from-to)1127-1142
Number of pages16
JournalCanadian Mineralogist
Volume30
Issue number4
Publication statusPublished - 1992 Jan 1

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology

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