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dc.contributor.authorHacker, Bradley R.  Concept link
dc.contributor.authorMehl, Luc  Concept link
dc.contributor.authorKelemen, Peter B.  Concept link
dc.contributor.authorRioux, Matthew  Concept link
dc.contributor.authorBehn, Mark D.  Concept link
dc.contributor.authorLuffi, Peter  Concept link
dc.date.accessioned2010-06-07T19:51:19Z
dc.date.available2010-06-07T19:51:19Z
dc.date.issued2008-03-07
dc.identifier.citationJournal of Geophysical Research 113 (2008): B03204en_US
dc.identifier.urihttps://hdl.handle.net/1912/3593
dc.descriptionAuthor Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research 113 (2008): B03204, doi:10.1029/2007JB005208.en_US
dc.description.abstractThe Talkeetna arc is one of two intraoceanic arcs where much of the section from the upper mantle through the volcanic carapace is well exposed. We reconstruct the vertical section of the Talkeetna arc by determining the (re)crystallization pressures at various structural levels. The thermobarometry shows that the tonalites and quartz diorites intruded at ∼5–9 km into a volcanic section estimated from stratigraphy to be 7 km thick. The shallowest, Tazlina and Barnette, gabbros crystallized at ∼17–24 km; the Klanelneechena Klippe crystallized at ∼24–26 km; and the base of the arc crystallized at ∼35 km depth. The arc had a volcanic:plutonic ratio of ∼1:3–1:4. However, many or most of the felsic plutonic rocks may represent crystallized liquids rather than cumulates so that the liquid:cumulate ratio might be 1:2 or larger. The current 5- to 7-km structural thickness of the plutonic section of the arc is ∼15–30% of the original 23- to 28-km thickness. The bulk composition of the original Talkeetna arc section was ∼51–58 wt % SiO2.en_US
dc.description.sponsorshipFunded by NSF EAR-9910899.en_US
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2007JB005208
dc.subjectIsland arcen_US
dc.subjectGarneten_US
dc.subjectThermobarometryen_US
dc.titleReconstruction of the Talkeetna intraoceanic arc of Alaska through thermobarometryen_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2007JB005208


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