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HYDRATION, O-18 ENRICHMENT AND OXIDATION DURING OCEAN-FLOOR HYDROTHERMAL METAMORPHISM OF OPHIOLITIC METABASIC ROCKS FROM E LIGURIA, ITALY

Abstract:

During ocean-floor hydrothermal metamorphism of a 225 m thick allochthonous Jurassic sequence of ophiolitic pillow lavas and underlying material in E. Liguria, Italy, the rocks were hydrated, enriched in 18O and oxidised. H2O+ contents increased from ~0.3 to 3.8 wt.%, δ18O values increased from ~ +6‰ to values as high as +13.2‰, and ( Fe2O3 FeO*) increased from 0.18 to ratios as high as 1.0. Both δ18O values and oxidation ratios decrease in the original direction of increasing depth. Pillow m...

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Publication status:
Published

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Authors


SPOONER, E More by this author
BECKINSALE, R More by this author
ENGLAND, P More by this author
Journal:
GEOCHIMICA ET COSMOCHIMICA ACTA
Volume:
41
Issue:
7
Pages:
857-871
Publication date:
1977
DOI:
ISSN:
0016-7037
URN:
uuid:73298f01-7598-4995-a6c3-e999c3a519b7
Source identifiers:
205390
Local pid:
pubs:205390
Language:
English

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