By Ruth A. M. Schmidt, Warren J. Nokleberg, Robert A. Page
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The method used to bin traces for stacking was biased toward producing the best possible stack of deep reflections; owing to the large number of stacked traces, even with a 30-m bin intewal, seismic sections shown in this report have been exaggerated horizontally by nearly 3: 1, so that individual traces could be plotted large enough to reveal amplitude variations. Three aspects of collecting seismic-reflection data, namely the shallow geology, the sinuous seismic lines, and the line lengths, all complicate geologic interpretation of these data.
Major field trip stops indicated by numbered stars. Adapted from Jones and others (1987), Nokleberg and others (1982), and Figures 2 and 3, below. Tectonostratigraphic terrane abbreviations: AP, Aurora Peak; GRC, metamorphic complex of Gulkana River, ML, Maclaren; WS, Wickersham; WR, Wrangellia; WY, Windy; YT, Yukon-Tanana. Hines Creek fault, the Meteor Peak fault, a major overturned antiform, the Broxson Gulch thrust, and the McCallum Creek-Slate Creek fault all abut against the Denali fault within a 6-km-long segment of the fault (Figure 2).
The interpretation in this study is mainly a result of the TACT program studies of the first and third authors, and is a modification of interpretations of the second author as presented in Foster and others (1987). The Northern Copper River Basin The Copper River Basin constitutes one of the major Mesozoic and Cenozoic sedimentary and volcanic rock intermontane basins of interior Alaska. The basin is flanked to the east by the young volcanoes of the Wrangell Mountains, to the south by the Chugach Mountains, and to the west by the Talkeetna Mountains.
Alaskan Geological and Geophysical Transect by Ruth A. M. Schmidt, Warren J. Nokleberg, Robert A. Page