Computer Science
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50.2381n&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 50, Issue 10, pp.2381-2386
Computer Science
6
Scientific paper
The southern margin of the Kiglapait Intrusion, Labrador, contains fine-grained rocks 5-6 m above a contact with anorthosite of the Nain Complex, and a laminated unit 3 m from the contact Three fine-grained samples and one of the laminated unit have a mean composition closely resembling that previously calculated by summation of the exposed Layered Group. Analyzed values agree closely with the earlier estimates for alkalies, Sr, and Y, thus they support the mineral/liquid partition coefficients previously calculated for these elements and for the rare earth elements. Based on new calculations, the value for ferric oxide is revised to 1.04% from its original value of 1.91%. The new samples are depleted in the incompatible elements titanium and phosphorus, suggesting that they have lost some residual liquid by sidewall fractional crystallization and downward motion of rejected solute. The marginal rocks provide no evidence for repeated injection of magma during Lower Zone time.
Morse Stephen A.
Nolan Kathleen M.
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