Boron-isotope systematics of Halmahera arc (Indonesia) lava: Evidence for involvement of the subducted slab
Journal Article
·
· Geology; (USA)
- Massachusetts Inst. of Tech., Cambridge (USA)
Dehydration of sediments and oceanic crust within the subducting slab at convergent plate margins is probably a ubiquitous feature. This leads to fractionation of elements between fluids and solids so that the slab-derived component of island-arc lavas is modified from the originally subducted material. Sediments and altered oceanic crust are enriched in boron and cesium relative to uncontaminated mantle products, and these elements are highly mobile during fluid-rock interaction. The combination of B-isotope systematics and Cs concentrations in lavas from the Halmahera arc (Indonesia) suggests that they have been influenced by fluids derived from dehydration and/or melting of the subducted slab.
- OSTI ID:
- 5542645
- Journal Information:
- Geology; (USA), Vol. 19:3; ISSN 0091-7613
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
INDONESIA
VOLCANIC REGIONS
LAVA
GEOCHEMISTRY
BORON ISOTOPES
CESIUM
DEHYDRATION
EARTH MANTLE
ENRICHMENT
GEOLOGIC HISTORY
ISOTOPE RATIO
OCEANIC CRUST
PLATE TECTONICS
RESERVOIR FLUIDS
RESERVOIR ROCK
ROCK-FLUID INTERACTIONS
SEDIMENTS
SUBDUCTION ZONES
ALKALI METALS
ASIA
CHEMISTRY
DEVELOPING COUNTRIES
EARTH CRUST
ELEMENTS
FLUIDS
ISLANDS
ISOTOPES
METALS
TECTONICS
580000* - Geosciences
INDONESIA
VOLCANIC REGIONS
LAVA
GEOCHEMISTRY
BORON ISOTOPES
CESIUM
DEHYDRATION
EARTH MANTLE
ENRICHMENT
GEOLOGIC HISTORY
ISOTOPE RATIO
OCEANIC CRUST
PLATE TECTONICS
RESERVOIR FLUIDS
RESERVOIR ROCK
ROCK-FLUID INTERACTIONS
SEDIMENTS
SUBDUCTION ZONES
ALKALI METALS
ASIA
CHEMISTRY
DEVELOPING COUNTRIES
EARTH CRUST
ELEMENTS
FLUIDS
ISLANDS
ISOTOPES
METALS
TECTONICS
580000* - Geosciences