Analysis of detrital zircon fission track ages of the Upper Cretaceous Valdez Group and Paleogene Orca Group in Western Prince William Sound Alaska
Analysis of detrital zircon fission track ages of the Upper Cretaceous Valdez Group and Paleogene Orca Group in Western Prince William Sound Alaska
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阿拉斯加威廉王子湾西部上白垩统 Valdez 群和古近纪 Orca 群碎屑锆石裂变径迹年龄分析
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发表时间：
2012
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通讯作者：
Benjamin M. Carlson
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作者：
Benjamin M. Carlson
阿拉斯加南部的一个主要组成部分是晚白垩世-始新世增生杂岩，从西部的萨纳克岛到东南部的查塔姆海峡，绵延 2200 公里。该复合体主要由 Chugach-Prince William (CPW) 复合地体的复理石组成（Plafker 等，1994）。尽管相交山脊的位置存在争议，但 CPW 在 61 Ma 到 50 Ma 之间被 Sanak-Baranof 带的近海沟岩体历时侵入（参见 Cowan，2003；Haeussler 等，2003）。除了始新世晚期的第二次近海沟岩体作用之外，在吸积之前可能发生了显着的边缘平行输运，这是 Eshamy 岩体组的一部分（约翰逊，本卷）。
A major component of southern Alaska is a Late Cretaceous-Eocene accretionary complex that extends for 2200 km from Sanak Island in the west to Chatham Strait in the southeast. The complex is comprised primarily of flysch of the Chugach-Prince William (CPW) composite terrane (Plafker et al., 1994). The CPW was diachronously intruded by near-trench plutons of the Sanak-Baranof belt between 61 and 50 Ma, although the location of the intersecting ridge is controversial (cf. Cowan, 2003; Haeussler et al., 2003). Significant margin-parallel transport may have occurred prior to accretion in addition to a second episode of near-trench plutonism in the Late Eocene, which are part of Eshamy Suite of plutons (Johnson, this volume).