Experimentally derived high-pressure cumulates from hydrous arc magmas and consequences for the seismic velocity structure of lower arc crust

Geophysical Research Letters

Volumn 33, Issue 21, 2006, Pages

  Müntener, Othmar ^a,b   Ulmer, Peter ^c  

^a UNIVERSITY OF BERN   (Switzerland)

^b UNIVERSITY OF LAUSANNE   (Switzerland)

^c ETH ZURICH   (Switzerland)

Author keywords

[No Author keywords available]

Indexed keywords

IMAGING TECHNIQUES; PLUTONIUM; ROCKS; SEISMOLOGY; VOLCANOES;

HYDROUS ARC MAGMAS; SATURATION BOUNDARY; SEISMIC VELOCITY; ULTRAMAFIC CUMULATES;

SEISMIC PROSPECTING;

ANDESITE; CONTINENTAL CRUST; CRUST-MANTLE BOUNDARY; CUMULATE; DACITE; HIGH PRESSURE; IGNEOUS GEOCHEMISTRY; ISLAND ARC; MAGMA; MOHO; PLAGIOCLASE; SEISMIC VELOCITY; ULTRAMAFIC ROCK; VELOCITY STRUCTURE;

EID: 34248513514     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/2006GL027629     Document Type: Article

References (28)

1. ANCORP Working Group (2003), Seismic imaging of a convergent continental margin and plateau in the central Andes (Andean Continental Research Project 1996 (ANCORP'96)), J. Geophys. Res., 108(B7), 2328, doi:10.1029/ 2002JB001771.
2. Baker, M. B., T. L. Grove, and R. Price (1994), Primitive basalts and andesites from the ML Shasta region, N. California: Products of varying melt fraction and water content, Contrib. Mineral. Petrol., 118, 111-129.
3. Beck, S. L., and G. Zandt (2002), The nature of orogenic crust in the central Andes, J. Geophys. Res., 107(810), 2230, doi:10.1029/ 2000JB000124.
4. Behn, M. E., and P. B. Kelemen (2006), The stability of lower arc crust: Insights from the Talkeetna arc section, south central Alaska and the seismic structure of modern arcs, J. Geophys. Res., doi:10.1029/ 2006JB004327, in press.
5. Boyd, O. S., C. H. Jones, and A. F. Sheehan (2004), Foundering lithosphere imaged beneath the Southern Sierra Nevada, California, USA, Science, 305, 660-662.
6. Burg, J. P., J. L. Bodinier, S. Chaudhry, S. Hussain, and H. Dawood (1998), Infra-arc mantle-crust transition and intra-arc mantle diapirs in the Kohistan complex (Pakistani Himalaya): Petro-structural evidence, Terra Nova, 10, 74-80.
7. Christensen, N. I., and W. D. Mooney (1995), Seismic velocity structure and composition of the continental crust: A global view, J. Geophys. Res., 100, 9761-9788.
8. Conrad, W. K., and R. W. Kay (1984), Ultramafic and mafic inclusions from Adak Island: Crystallization history and implications for the nature of primary magmas and crustal evolution in the Aleutian island arc, J. Petrol., 25, 88-125.
9. DeBari, S. M., and N. H. Sleep (1991), High-Mg, low-Al bulk composition of the Talkeetna island arc, Alaska: Implications for primary magmas and the nature of arc crust, Geol. Soc. Am. Bull., 103, 37-47.
10. Greene, A. R., S. M. DeBari, P. B. Kelemen, J. Blusztain, and P. D. Clift (2006), A detailed geochemical study of island arc crust: The Talkeetna arc section, south-central Alaska, J. Petrol., 47, 1051-1093.
11. Grove, T. L., R. J. Kinzler, and W. B. Bryan (1992), Fractionation of mid-ocean ridge basalt (MORB), in Mantle Flow and Melt Generation at Mid-Ocean Ridges, Geophys. Monogr. Ser., vol. 71, edited by J. Phipps Morgan, D. K. Blackman, and J. M. Sinton, pp. 281-310, AGU, Washington, D. C.
12. 2O contents of minerals and rocks at pressure and temperature, Geochem. Geophys. Geosysl., 5, Q01005, doi:10.1029/2003GC000614.
13. Kägi, R. (2001), The liquid line of descent of hydrous, primary calc-alcaline magmas under elevated pressure: An experimental approach, Ph.D. thesis, ETH Zürich, Zürich.
14. 2 conditions of natural calc-alkaline magmas, Am. Mineral., 90, 708-717.
15. Kay, S. M., and R. W. Kay (1985), Role of crystal cumulates and the oceanic crust in the formation of the lower crust of the Aleutian arc, Geology, 13, 461-464.
16. Kelemen, P. B., K. Hanghoj, and A. R. Greene (2003), One view of the geochemistry of subduction-related magmatic arcs, with an emphasis on primitive andesite and lower crust, in The Crust, edited by R. L. Rudnick, pp. 593-659, Elsevier, New York.
17. Miller, D. J., and N. I. Christensen (1994), Seismic signature and geochemistry of an island arc: A multidisciplinary study of the Kohistan accreted terrane, northern Pakistan, J. Geophys. Res., 99, 11,623-11,642.
18. 2O during crystallization of primitive arc magmas under uppermost mantle conditions and genesis of igneous pyroxenites: An experimental study, Contrib. Mineral. Petrol., 141, 643-658.
19. Perez-Alonso, R., P. Ulmer, O. Müntener, and A. B. Thompson (2004), Experimental phase equilibria and trace element partitioning in differentiated hydrous calc-alkaline melts at high pressures, Eos Trans. AGU, 85(47), Fall Meet. Suppl., Abstract V13B-1473.
20. Rudnick, R. L. (1995), Making continental crust, Nature, 378, 571-577.
21. Rudnick, R. L., and D. M. Fountain (1995), Nature and composition of the continental crust: A lower crustal perspective, Rev. Geophys., 33(3), 267-309.
22. Shillington, D. J., H. J. A. Van Avendonk, W. S. Holbrook, P. B. Kelemen, and M. J. Hornbach (2004), Composition and structure of the central Aleutian island arc from arc-parallel wide-angle seismic data, Geochem. Geophys. Geosyst., 5, Q10006, doi:10.1029/2004GC000715.
23. Tassara, A. (2006), Factors controlling the crustal density structure underneath active continental margins with implications for their evolution, Geochem. Geophys. Geosyst., 7, Q01001, doi:10.1029/2005GC001040.
24. Ulmer, P. (1986), Basische und ultrabasische Gesteine des Adamello (Provinzen Brescia und Trento, Norditalien), Ph.D. thesis, ETH Zürich, Zürich.
25. 2 space: An experimental determination to 30 kbar and 1600°C, Contrib. Mineral. Petrol., 106, 265-272.
26. Van Avendonk, H. J. A., D. J. Shillington, W. S. Holbrook, and M. J. Hornbach (2004), Inferring crustal structure in the Aleutian island arc from a sparse wide-angle seismic data set, Geochem. Geophys. Geosyst., 5, Q08008, doi:10.1029/2003GC000664.
27. Villiger, S., P. Ulmer, O. Müntener, and A. B. Thompson (2004), The liquid line of descent of anhydrous, mantle-derived, tholeiitic liquids by fractional and equlibrium crystallization - an experimental study at 1.0 GPa, J. Petrol., 45, 2369-2388.
28. Zandt, G., H. Gilbert, T. J. Owens, M. D. Ducea, J. Saleeby, and C. H. Jones (2004), Active foundering of a continental arc root beneath the southern Sierra Nevada in California, Nature, 431, 41-46.