Stable isotope evidence for limited fluid infiltration of deep crustal rocks from the Ivrea Zone, Italy
Journal Article
·
· Geology; (United States)
Isotopic and petrologic studies of the Ivrea Zone, a segment of deep-crustal high-grade rocks, suggest that metamorphism did not involve the transfer of large quantities of CO/sub 2/ from mantle to crust. High-grade Ivrea Zone calcites may retain high ..delta../sup 18/O (up to 24 per thousand SMOW), indicating little interaction with externally derived fluid. Graphite isotopic compositions (..delta../sup 13/C = -10 per thousand to -25 per thousand PDB) that do not vary with grade are attributed to mixing between carbonate carbon and biogenic noncarbonate carbon. Calcites from high-grade, carbonate-poor amphibolites have ..delta../sup 13/C of about 1 per thousand PDB and sedimentary, not infiltrative, origins. The general lack of carbon and oxygen isotopic homogenization suggests that fluid interactions may be explained in terms of fluid generated internally to the Ivrea Zone metasedimentary rocks.
- Research Organization:
- Grant Institute of Geology, Edinburgh (Scotland)
- OSTI ID:
- 7042403
- Journal Information:
- Geology; (United States), Journal Name: Geology; (United States) Vol. 16:6; ISSN GLGYB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
011000* -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
CALCITE
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON
CARBON 13
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON ISOTOPES
CARBON OXIDES
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
ELEMENTAL MINERALS
ELEMENTS
ENVIRONMENTAL TRANSPORT
EUROPE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FLUIDS
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GRAPHITE
INCLUSIONS
ISOTOPES
ITALY
LIGHT NUCLEI
MASS TRANSFER
METAMORPHISM
MINERALS
NONMETALS
NUCLEI
OXIDES
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
RESERVOIR FLUIDS
ROCKS
SEDIMENTARY ROCKS
STABLE ISOTOPES
WESTERN EUROPE
011000* -- Coal
Lignite
& Peat-- Reserves
Geology
& Exploration
ALKALINE EARTH METAL COMPOUNDS
CALCITE
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON
CARBON 13
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON ISOTOPES
CARBON OXIDES
CARBONATE MINERALS
CARBONATE ROCKS
CARBONATES
CHALCOGENIDES
ELEMENTAL MINERALS
ELEMENTS
ENVIRONMENTAL TRANSPORT
EUROPE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FLUIDS
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
GRAPHITE
INCLUSIONS
ISOTOPES
ITALY
LIGHT NUCLEI
MASS TRANSFER
METAMORPHISM
MINERALS
NONMETALS
NUCLEI
OXIDES
OXYGEN 18
OXYGEN COMPOUNDS
OXYGEN ISOTOPES
RESERVOIR FLUIDS
ROCKS
SEDIMENTARY ROCKS
STABLE ISOTOPES
WESTERN EUROPE