Mantle sources and the highly variable role of continental lithosphere in basalt petrogenesis of the Kerguelen Plateau and Broken Ridge LIP; results from ODP Leg 183

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doi: 10.1093/petrology/43.7.1177
Author(s): Neal, C. R.; Mahoney, J. J.; Chazey, W. J., III
Author Affiliation(s): Primary:
University of Notre Dame, Department of Civil Engineering and Geological Sciences, Notre Dame, IN, United States
University of Hawaii, United States
Volume Title: Journal of Petrology
Source: Journal of Petrology, 43(7), p.1177-1205. Publisher: Oxford University Press, Oxford, United Kingdom. ISSN: 0022-3530 CODEN: JPTGAD
Note: In English. 80 refs.; illus., incl. 3 tables, sketch map
Summary: Listed isotopic (Nd, Sr, Pb), major and trace element analyses of tholeiitic and alkali basalts and a dacite show variable involvement of continental lithosphere ranging from significant (e.g. a dacite) to zero. The latter is well seen in a 100 m.y. old tholeiitic basalt in the central Kerguelen Plateau which has isotopic and incompatible element ratios similar to those estimated for primitive mantle, being the melt products of a major component of the Kerguelen plume head. Some alkali basalts have isotopic signatures of mantle origin and probably represent, in relatively pure form, the composition of a major component of the Cretaceous Kerguelen plume tail. This is modelled with periodic replenishment and fractional crystallization processes.
Year of Publication: 2002
Research Program: ODP Ocean Drilling Program
Key Words: 05 Petrology, Igneous and Metamorphic; Assimilation; Basalts; Basement; Broken Ridge; Continental lithosphere; Igneous rocks; Kerguelen Plateau; Large igneous provinces; Leg 183; Lithosphere; Magmas; Mantle; Mantle plumes; Mid-ocean ridge basalts; ODP Site 1136; ODP Site 1137; ODP Site 1138; ODP Site 1139; ODP Site 1140; ODP Site 1141; ODP Site 1142; Ocean Drilling Program; Volcanic rocks
Coordinates: S600000 S320000 E0980000 E0630000
Record ID: 2003010532
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom