Strontium isotope composition and petrogenesis of the Kirkpatrick basalt, Queen Alexandra Range, Antarctica

• Published in: Contributions to Mineralogy and Petrology
• Main Authors: Elliot, D. H., Jones, Lois M., Bowman, Johns R., Faure, G.
• Other Authors: Department of Geology and Mineralogy and Institute of Polar Studies, The Ohio State University, 43210, Columbus, Ohio; Department of Geology and Mineralogy, University of Michigan, 48104, Ann Arbor, Michigan, Department of Geology and Mineralogy and Institute of Polar Studies, The Ohio State University, 43210, Columbus, Ohio, Ann Arbor
• Format: Article in Journal/Newspaper
• Language: English
• Published: Springer-Verlag 1974
• Subjects: Mineralogy; Mineral Resources; Geology; Geosciences; Geology and Earth Sciences; Chemistry; Science; Storm Peak; Antarc*; Antarctica
• Online Access: http://hdl.handle.net/2027.42/47318; https://doi.org/10.1007/BF00383353

The initial 87 Sr/ 86 Sr ratios of twelve basalt flows of Jurassic age on Storm Peak in the Queen Alexandra Range are anomalously high and range from 0.7094–0.7133. The average value is 0.7112±0.0013 (1 σ ). The concentrations of rubidium and strontium have arithmetic means of 60.6±19.4 ppm and 128.8±11.9 ppm, respectively. The corresponding average Rb/Sr ratio is 0.47 which is also anomalously high for rocks of basaltic composition. In addition, these rocks have high concentrations of SiO 2 (56.50%) and K 2 O (1.29%) and are depleted in Al 2 O 3 (12.92%), MgO (3.44%) and CaO (7.91%) compared to average continental tholeiites. They are nevertheless classified as basalts on the basis of the composition of microphenocrysts. Peer Reviewed http://deepblue.lib.umich.edu/bitstream/2027.42/47318/1/410_2004_Article_BF00383353.pdf