Sm-Nd age of the Fiskenaesset Anorthosite Complex, West Greenland

Details Sm-Nd age of the Fiskenaesset Anorthosite Complex, West Greenland Sm-Nd age of the Fiskenaesset Anorthosite Complex, West Greenland

Jan 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989e%26psl..91..261a&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 91, no. 3-4, Jan. 1989, p. 261-270.

Computer Science

6

Anorthosite, Geochronology, Neodymium Isotopes, Samarium Isotopes, Abundance, Crystallization, Earth Mantle, Gabbro, Greenland, Metamorphism (Geology), Trace Elements

Scientific paper

A Sm-Nd isotopic study on samples from the Fiskenaesset Anorthosite Complex in West Greenland was conducted to estimate the age of crystallization of the complex. A five-point isochron, including data for whole-rock samples of anorthosite, metagabbro, metaperidotite, and separates of calcic plagioclase and mafic matrix from a coarse megacrystic leucogabbro, corresponds to an age of 2.86 + or - 0.05 Ga, with initial sigma(Nd) of +2.9 + or - 0.4. This implies a relatively short time interval, on the order of 70 Ma, during which anorthosite formation, tonalite emplacement, and high-grade metamorphism took place.

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