Sr-Nd-Pb isotopic evidence for crustal contamination in the Rhum intrusion

Details Sr-Nd-Pb isotopic evidence for crustal contamination in the Rhum intrusion Sr-Nd-Pb isotopic evidence for crustal contamination in the Rhum intrusion

Jun 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985e%26psl..74...35p&link_type=abstract

Earth and Planetary Science Letters, Volume 74, Issue 1, p. 35-44.

Physics

5

Scientific paper

Sr, Nd and Pb isotope ratios measured on cumulates from the Eastern Layered Series (ELS) of the Rhum intrusion indicate that the Rhum magma chamber was contaminated by upper crustal amphibolite facies Lewisian gneiss. This is in marked contrast to the Skye Main Lava Series of Skye which shows extensive contamination by lower crustal granulite facies Lewisian gneiss [3]. The amount of contamination involved was about 7%. Cryptic Sr isotope profiles through the ELS show that contamination was extremely variable and may be controlled by mixing between fractionated/contaminated magma and periodic injections of primitive magma into the chamber.

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