Sources of oceanic basalts: radiogenic isotopic evidence
Journal Article
·
· Geology; (United States)
Oceanic basalts can be subdivided into five distinct groupings on the basis of their Sr, Nd, and Pb isotope composition. These classes, represented by mid-ocean ridge basalts (MORB) and St. Helena, Kerguelen, the Society Islands, and the Hawaiian Islands, may represent different but internally heterogeneous mantle reservoirs or merely distinct groups within which chemical evolution has proceeded in a similar manner. Little systematic geographic distribution of volcanism tapping these sources is apparent. Depletion has been most important in the evolution of the MORB-type reservoirs, whereas crustal recycling has dominated the evolution of sources of the Kerguelen and Society types. Primitive mantle is identifiable in the Sr, Nd, Hf, and Pb isotope characteristics of the Hawaiian source only. The evolution of St. Helena-type sources remains enigmatic. 33 references, 2 figures.
- Research Organization:
- Max-Planck-Institut fuer Chemie, Mainz, West Germany
- OSTI ID:
- 5486834
- Journal Information:
- Geology; (United States), Journal Name: Geology; (United States) Vol. 13:2; ISSN GLGYB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Crustal contamination versus subduction zone enrichment: example from the lesser antilles and implications for mantle source compositions of island arc volcanic rocks
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Journal Article
·
Sat Aug 01 00:00:00 EDT 1987
· Geochim. Cosmochim. Acta; (United States)
·
OSTI ID:5064489
Dupal anomaly in existence 115 Ma ago: Evidence from isotopic study of the Kerguelen Plateau (South Indian Ocean)
Journal Article
·
Tue Aug 01 00:00:00 EDT 1989
· Geochimica et Cosmochimica Acta; (USA)
·
OSTI ID:7164100
Helium- and lead-isotope geochemistry of oceanic volcanic rocks from the East Pacific and South Atlantic. Doctoral thesis
Technical Report
·
Wed Dec 31 23:00:00 EST 1986
·
OSTI ID:6967820
Related Subjects
510101* -- Environment
Terrestrial-- Basic Studies-- Radiometric Techniques-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALINE EARTH ISOTOPES
BASALT
EARTH CRUST
FEDERAL REGION IX
HAWAII
IGNEOUS ROCKS
ISOTOPES
LEAD ISOTOPES
NEODYMIUM ISOTOPES
NORTH AMERICA
OCEANIC CRUST
ORIGIN
PACIFIC OCEAN
RADIOISOTOPES
ROCKS
SEAS
STRONTIUM ISOTOPES
SURFACE WATERS
USA
VOLCANIC ROCKS
Terrestrial-- Basic Studies-- Radiometric Techniques-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALINE EARTH ISOTOPES
BASALT
EARTH CRUST
FEDERAL REGION IX
HAWAII
IGNEOUS ROCKS
ISOTOPES
LEAD ISOTOPES
NEODYMIUM ISOTOPES
NORTH AMERICA
OCEANIC CRUST
ORIGIN
PACIFIC OCEAN
RADIOISOTOPES
ROCKS
SEAS
STRONTIUM ISOTOPES
SURFACE WATERS
USA
VOLCANIC ROCKS