Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (35) Citing Articles via Google Scholar Google Scholar Articles by Bindeman, I. N. Articles by Valley, J. W. Search for Related Content GeoRef GeoRef Citation

Formation of low-¹⁸O rhyolites after caldera collapse at Yellowstone, Wyoming, USA

¹ Department of Geology and Geophysics, University of Wisconsin, 1215 West Dayton Street, Madison, Wisconsin 53706, USA

We present a new model for the genesis of low-¹⁸O rhyolites of the Yellowstone caldera based on analyses of zircons and individual quartz phenocrysts. Low-¹⁸O rhyolites were erupted soon after the massive caldera-forming Lava Creek Tuff eruption (602 ka, 1000 km³) and contain xenocrysts of quartz and zircon inherited from precaldera rhyolites. These zircons are isotopically zoned and out of equilibrium with their host low-¹⁸O melts and quartz. Diffusion modeling predicts that magmatic disequilibria of oxygen isotopes persists for as much as tens of thousands of years following nearly total remelting of the hydrothermally altered igneous roots of the depressed cauldron, in which the alteration-resistant quartz and zircon initially retained their ¹⁸O values. These results link melting to caldera collapse, rule out rapid or catastrophic magma–meteoric water interaction, and indicate wholesale melting rather than assimilation or partial melting.

Key Words: Yellowstone • zircon • oxygen isotopes • caldera • low ¹⁸O

This article has been cited by other articles:

				G. Girard and J. Stix Magma Recharge and Crystal Mush Rejuvenation Associated with Early Post-collapse Upper Basin Member Rhyolites, Yellowstone Caldera, Wyoming J. Petrology, November 3, 2009; (2009) egp070v1. [Abstract] [Full Text] [PDF]

				Y. F. Zheng, B. Gong, Z. F. Zhao, Y. B. Wu, and F. K. Chen Zircon U-Pb age and o isotope evidence for neoproterozoic low-18O magmatism during supercontinental rifting in South China: Implications for the snowball earth event Am J Sci, April 1, 2008; 308(4): 484 - 516. [Abstract] [Full Text] [PDF]

				J. Potter, F.J. Longstaffe, and S.M. Barr Regional 18O-depletion of Neoproterozoic igneous rocks from Avalonia, Cape Breton Island and southern New Brunswick, Canada Geological Society of America Bulletin, March 1, 2008; 120(3-4): 347 - 367. [Abstract] [Full Text] [PDF]

				K. M. Cooper and M. R. Reid Uranium-series Crystal Ages Reviews in Mineralogy and Geochemistry, January 1, 2008; 69(1): 479 - 544. [Full Text] [PDF]

				I. N. Bindeman, B. Fu, N. T. Kita, and J. W. Valley Origin and Evolution of Silicic Magmatism at Yellowstone Based on Ion Microprobe Analysis of Isotopically Zoned Zircons J. Petrology, January 1, 2008; 49(1): 163 - 193. [Abstract] [Full Text] [PDF]

				J. A. Miller and C. Harris Petrogenesis of the Swaziland and Northern Natal Rhyolites of the Lebombo Rifted Volcanic Margin, South East Africa J. Petrology, January 1, 2007; 48(1): 185 - 218. [Abstract] [Full Text] [PDF]

				J. A. Vazquez and M. R. Reid Probing the Accumulation History of the Voluminous Toba Magma Science, August 13, 2004; 305(5686): 991 - 994. [Abstract] [Full Text] [PDF]

				E. M. King, J. W. Valley, D. F. Stockli, and J. E. Wright Oxygen isotope trends of granitic magmatism in the Great Basin: Location of the Precambrian craton boundary as reflected in zircons Geological Society of America Bulletin, March 1, 2004; 116(3-4): 451 - 462. [Abstract] [Full Text] [PDF]

				J. Stix, B. Kennedy, M. Hannington, H. Gibson, R. Fiske, W. Mueller, and J. Franklin Caldera-forming processes and the origin of submarine volcanogenic massive sulfide deposits Geology, April 1, 2003; 31(4): 375 - 378. [Abstract] [Full Text] [PDF]

				J. W. Valley and J. W. Valley Oxygen Isotopes in Zircon Reviews in Mineralogy and Geochemistry, January 1, 2003; 53(1): 343 - 385. [Full Text] [PDF]

				I. N. BINDEMAN and J. W. VALLEY Low-{{delta}}18O Rhyolites from Yellowstone: Magmatic Evolution Based on Analyses of Zircons and Individual Phenocrysts J. Petrology, August 1, 2001; 42(8): 1491 - 1517. [Abstract] [Full Text] [PDF]

				D. R. Cole, D. R. Cole, and S. Chakraborty Rates and Mechanisms of Isotopic Exchange Reviews in Mineralogy and Geochemistry, January 1, 2001; 43(1): 83 - 223. [Full Text] [PDF]

				J. M. Eiler and J. M. Eiler Oxygen Isotope Variations of Basaltic Lavas and Upper Mantle Rocks Reviews in Mineralogy and Geochemistry, January 1, 2001; 43(1): 319 - 364. [Full Text] [PDF]

				J. W. Valley and J. W. Valley Stable Isotope Thermometry at High Temperatures Reviews in Mineralogy and Geochemistry, January 1, 2001; 43(1): 365 - 413. [Full Text] [PDF]