Affiliation:
1. Department of Earth and Space Sciences, University of California, Los Angeles, CA 90095, USA.
Abstract
Strontium isotope ratios measured from core to rim across plagioclase feldspar crystals can be used to monitor changes in the isotope composition of the magma from which they grew. In samples from three magma systems from convergent margin volcanoes, sudden changes in major element composition, petrographic features, and strontium isotope composition were found to correspond to discrete magmatic events, most likely repeated recharge of more mafic magma with lower ratios of strontium-87 to strontium-86 into a crustally contaminated magma.
Publisher
American Association for the Advancement of Science (AAAS)
Reference29 articles.
1. Singer B. S., Dungan M. A., Layne G. D., Am. Mineral. 80, 776 (1995).
2. Anderson A. T., ibid. 68, 125 (1983);
3. Pearce T. H. and , Clark A. H., Geology 17, 757 (1989).
4. Clynne M. A., Muffler L. J. P., N.M. Bur. Mines Miner. Resour. Mem. 47, 183 (1989).
5. A model for the 1914–1915 Lassen Peak eruptions equally well describes the earlier Chaos Crags mixing event (M. A. Clynne J. Petrol. in press).
Cited by
253 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献