Computer Science
Scientific paper
Jul 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45.1051m&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 45, Issue 7, pp.1051-1060
Computer Science
10
Scientific paper
Rb-Sr and Pb/Pb whole rock isochrons on the Qôrqut Granite Complex yield ages of 2530 ± 30 Myr (initial 87 Sr / 86 Sr = 0.7081 ± 0.0008) and 2580 ± 80 Myr respectively. A model relating initial Sr and Pb isotopic compositions of the Qôrqut granites to the Sr and Pb isotopic compositions of the Amîtsoq gneisses ( ca . 3700 Myr) and Nûk gneisses ( ca . 2900 Myr) at 2550 Myr ago, as well as Sr and Pb contents of the gneiss units, suggests that between 40 and 50% of the Qôrqut granite magma was generated by partial melting of Amîtsoq gneisses, and the remainder by partial melting of Nûk gneisses.
Goodwin Roy
Moorbath Stephen
Taylor Paul N.
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