Reply to comment by E. Martin, M. Martin, and O. Sigmarsson on "Continental geochemical signatures in dacites from Iceland and implications for models of early Archaean crust formation" by M. Willbold, E. Hegner, A. Stracke, and A. Rocholl

Earth and Planetary Science Letters

Volumn 293, Issue 1-2, 2010, Pages 220-222

  Willbold, M ^a,b,c   Hegner, E ^c   Stracke, A ^b,d   Rocholl, A ^c  

^a UNIVERSITY OF BRISTOL   (United Kingdom)

^b MAX PLANCK INSTITUTE FOR CHEMISTRY   (Germany)

^c UNIVERSITY OF MUNICH   (Germany)

^d ETH ZURICH   (Switzerland)

Author keywords

Archaean; Archean; Continental crust; Iceland; Oceanic plateau; Subduction; Tonalite trondhjemite granodiorite (TTG)

Indexed keywords

EID: 77950337627     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.epsl.2010.02.022     Document Type: Letter

References (35)

1. Arculus R.J., Lapierre H., Jaillard É Geochemical window into subduction and accretion processes: Raspas metamorphic complex, Ecuador. Geology 1999, 27:547-550.
2. Arndt N., et al. Were komatiites wet?. Geology 1998, 26:739-742.
3. Bickle M.J. Heat loss from the Earth: a constraint on Archaean tectonics from the relation between geothermal gradients and the rate of plate production. Earth Planet. Sci. Lett. 1978, 40:301-315.
4. Chiaradia M., Münterer O., Bernardo B., Fontignie D. Adakite-like volcanism of Ecuador: lower crust magmatic evolution and recycling. Contrib. Mineral. Petrol. 2009, 158:563-588.
5. Condie K.C. Chemical composition and evolution of the upper continental crust: contrasting results from surface samples and shales. Chem. Geol. 1993, 1993:1-37.
6. Condie K.C. TTGs and adakites: are they both slab melts?. Lithos 2005, 80:33-44.
7. Drummond M.S., Defant M.J. A model for trondhjemite-tonalite-dacite genesis and crustal growth via slab melting: Archean to modern comparisons. J. Geophys. Res. 1990, 95:21503-21521.
8. Garrison J.M., Davidson J.P. Dubious case for slab melting in the Northern volcanic zone of the Andes. Geology 2003, 31:565-568.
9. Herzberg C. Depth and degree of melting of komatiite. J. Geophys. Res. 1992, 97:4521-4540.
10. Hoffmann J.E., et al. The origin of TTGs inferred from high-precision HFSE measurements. Geochim. Cosmochim. Acta 2009, 73:A540.
11. Jónasson K. Silicic volcanism in Iceland: composition and distribution within the active volcanic zones. J. Geodyn. 2007, 43:101-117.
12. Jónasson K., Holm P.M., Pedersen A.K. Petrogenesis of silicic rocks from the Króksfjördur central volcano, NW Iceland. J. Petrol. 1992, 33:1345-1369.
13. Kaban M.K., Flóvenz Ó.G., Pálmason G. Nature of the crust-mantle transition zone and the thermal state of the upper mantle beneath Iceland from gravity modelling. Geophys. J. Int. 2002, 149:281-299.
14. Kay R.W. Aleutian magnesian andesites: melts from subducted Pacific Ocean crust. J. Volcanol. Geotherm. Res. 1978, 4:117-132.
15. Kay S.M., Godoy E., Kurtz A. Episodic arc migration, crustal thickening, subduction erosion, and magmatism in the south-central Andes. Geol. Soc. Am. Bull. 2005, 117:67-88.
16. Kemp A.I.S., Hawkesworth C.J. Granitic perspectives on the generation and secular evolution of the continental crust. Treatise on geochemistry 2003, 349-410. Elsevier. R.L. Rudnick (Ed.).
17. Martin H. Effect of steeper Archean geothermal gradient on the geochemistry of subduction-zone magmas. Geology 1986, 14:753-756.
18. Martin H. Adakitic magmas: modern analogues of Archean granitoids. Lithos 1999, 46:411-429.
19. Martin H., Moyen J.-F. Secular changes in tonalite-trondhjemite-granodiorite composition as markers of the progressive cooling of Earth. Geology 2002, 30:319-322.
20. Martin H., Smithies R.H., Rapp R., Moyen J.-F., Champion D. An overview of adakite, tonalite-trondhjemite-granodiorite (TTG), and sanukitoid: relationships and some implications for crustal evolution. Lithos 2005, 79:1-24.
21. Martin, E., Martin, H., Sigmarsson, O., this issue. Comment on "Continental geochemcial signatures in dacites from Iceland and implications for models of early Archaean crust formation" by M. Willbold, E. Hegner, A. Stracke, and A. Rocholl. Earth and Planetary Science Letters.
22. McDonough W., Sun S.S. The composition of the Earth. Chem. Geol. 1995, 120:223-253.
23. Moyen J.-F., Stevens G. Experimental constraints on TTG petrogenesis: implications for Archaean geodynamics. Archaean Geodynamics and Environments 2006, 149-175. K. Benn, K.C. Condie, J.C. Mareschal (Eds.).
24. Nair R., Chacko T. Role of oceanic plateaus in the initiation of subduction and origin of continental crust. Geology 2008, 36:583-586.
25. Nehring F., Foley S.F., Hölttä P., Van den Kerkhof A.M. Internal differentiation of the Archean continental crust: fluid-controlled partial melting of granulites and TTG-amphibolite associations in central Finland. J. Petrol. 2009, 50:3-35.
26. Nisbett E.G., Cheadle M.J., Arndt N.J., Bickle M.J. Constraining the potential temperature of the Archean mantle: a review of the evidence from komatiites. Lithos 1993, 30:291-307.
27. Óskarsson N., Sigvaldson G.E., Steinthórsson S. A dynamic model of rift zone petrogenesis and the regional petrology of Iceland. J. Petrol. 1982, 23:28-74.
28. Percival J.A. High-grade metamorphism in the Chapleau-Foleyet area, Ontario. Am. Mineral. 1983, 68:667-686.
29. Rapp R.P., Watson E.B. Dehydration melting of metabasalt at 8-32kbar: implications for continental growth and crust-mantle recycling. J. Petrol 1995, 36:891-931.
30. Rapp R.P., Watson E.B., Miller C.F. Partial melting of amphibolite/eclogite and the origin of Archean trondhjemites and tonalites. Precambrian Res. 1991, 51:1-25.
31. Rudnick R.L., Gao S. Composition of the continental crust. Treatise on Geochemistry 2004, 1-64. Elsevier-Pergamon, Oxford. R.L. Rudnick (Ed.).
32. Smithies R.H. The Archean tonalite-trondhjemite-granodiorite (TTG) series is not an analogue of Cenozoic adakite. Earth Planet. Sci. Lett. 2000, 182:115-125.
33. Smithies R.H., Champion D.C., Van Kranendonk M.J. The oldest well-preserved felsic volcanic rocks on Earth: geochemical clues to the early evolution of the Pilbara supergroup and implications for the growth of a Paleoarchean protocontinent. Earth's Oldest Rocks 2007, 339-369. Elsevier. M.J. Van Kranendonk, R.H. Smithies, V.C. Bennett (Eds.).
34. Van Kranendonk M.J., Smithies R.H., Hickman A.H., Champion D.C. Review: secular tectonic evolution of Archean continental crust: interplay between horizontal and vertical processes in the formation of the Pilbara Craton, Australia. Terra Nova 2007, 19:1-38.
35. Willbold M., Hegner E., Stracke A., Rocholl A. Continental geochemical signatures in dacites from Iceland and implications for models of early Archaean crust formation. Earth Planet. Sci. Lett. 2009, 279:44-52.