Thermal Evolution and Provenance Revealed through Detrital Zircon Fission Track Dating of the Upper Cretaceous Shumagin Formation, Nagai Island, Alaska
نویسنده
چکیده
Wrangellia Superterrane. The Paleozoic to Mesozoic Wrangellia superterrane (Insular terrane) consists of intraoceanic volcanic assemblages and basement rocks of the Peninsular, Wrangellia, and Alexander terranes (Plafker et al, 1994). The magmatic-arc assemblages of the Peninsular terrane appear to have been built upon the Wrangellia composite terrane prior to the midCretaceous and include: 1) a portion of the Talkeetna arc of the Peninsular terrane, and 2) a belt of plutonic rocks which includes the Chitina arc in the Wrangellia and Alexander Terranes and 3) the Chisana arc (Plafker et al, 1994).
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