Comagmatic granophyric granite in the Fish Canyon Tuff, Colorado: Implications for magma-chamber processes during a large ash-flow eruption

Geology

Volumn 25, Issue 10, 1997, Pages 915-918

  Lipman, Peter ^a   Dungan, Michael ^b   Bachmann, Olivier ^b  

^a U S GEOLOGICAL SURVEY   (United States)

^b UNIVERSITY OF GENEVA   (Switzerland)

Author keywords

[No Author keywords available]

Indexed keywords

MINERALS;

ASH-FLOW SHEET; COMPLEX EVENTS; COMPOSITIONAL GRADIENTS; LOWER CRUST; MAGMA CHAMBER; MAGMA STORAGE; MINERAL COMPOSITION; REMOBILIZATION;

FISH;

ASH FLOW; GRANITE; GRANOPHYRE; MAGMA CHAMBER; TUFF; VOLCANIC ERUPTION; ASH-FLOW ERUPTION; FISH CANYON TUFF; GRANOPHYRIC GRANITE; MAGMA-CHAMBER PROCESSES;

COLORADO; FISH CANYON; UNITED STATES; USA;

EID: 0031397173     PISSN: 00917613     EISSN: None     Source Type: Journal    
DOI: 10.1130/0091-7613(1997)025<0915:CGGITF>2.3.CO;2     Document Type: Article

References (9)

1. Best, M. G., and Christiansen, E. H., 1997, Broken crystals in ash-flow tuffs: Geological Society of America Bulletin, v. 109, p. 63-73.
2. Barker, D. S., 1970, Compositions of granophyre, myrmekite, and graphic granite: Geological Society of America Bulletin, v. 81, p. 3339-3350.
3. Francis, P. W., Sparks, R. S., Hawksworth, C. J., Thorpe, R. S., Pyle, D. M., Mantovani, M. S., Tait, S., and McDermott, F., 1989, Petrology and geochemistry of volcanic rocks of the Cerro Galan caldera, northwest Argentina: Geological Magazine, v. 126, p. 515-547.
4. Johnson, M. C., and Rutherford, M. J., 1989, Experimentally determined conditions in the Fish Canyon Tuff, Colorado, magma chamber: Journal of Petrology, v. 30, p. 711-737.
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6. Lowenstern, J. B., Clynne, M. A., and Bullen, T. D., 1997, Comagmatic A-type granophyre and rhyolite from the Alid Volcanic Center, Eritrea, Northeast Africa: Journal of Petrology (in press).
7. Rutherford, M. J., and Hill, P. M., 1993, Magma ascent rates from amphibole breakdown: An experimental study applied to the 1980-1986 Mount St. Helens eruptions: Journal of Geophysical Research, v. 98, p. 19667-19685.
8. Steven, T. A., and Lipman P. W, 1976, Calderas of the San Juan volcanic field, southwestern Colorado: U.S. Geological Survey Professional Paper 958, 35 p.
9. Whitney, J. A., and Stormer, J. C., Jr., 1985, Mineralogy, petrology, and magmatic conditions from the Fish Canyon Tuff, central San Juan volcanic field, Colorado: Journal of Petrology, v. 26, p. 726-762.