Out-of-sequence thrusting and structural continuity of the Endicott Mountains allochthon around the eastern end of the Doonerak window, central Brooks Range, Alaska
Out-of-sequence thrusting and structural continuity of the Endicott Mountains allochthon around the eastern end of the Doonerak window, central Brooks Range, Alaska
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阿拉斯加州布鲁克斯山脉中部杜纳拉克窗东端周围恩迪科特山脉异地的无序逆冲和结构连续性
DOI：
10.1130/0-8137-2324-8.51
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发表时间：
1998
期刊：
影响因子：
2.4
通讯作者：
H. A. Lallemant
中科院分区：
文献类型：
--
作者：
J. C. Phelps;H. A. Lallemant
布鲁克斯山脉褶皱冲断带中部的杜奈拉克窗是一个东北-西南走向的双倾伏对形，其下有两个复式构造：（1）下部杜奈拉克复式构造，由下古生代岩石切片组成;（2）上部布拉尼溪复式构造，主要由上古生界岩石切片组成。后者之上是恩迪科特山外来岩，由泥盆纪钙质和碎屑沉积岩组成。恩迪科特山外来体在窗口东端附近是连续的，但它被一个序列外逆冲断层（Eekayruk断层）破坏。上覆于恩迪科特山脉外来体之上的是斯卡吉特外来体，它由下至中古生代钙质和碎屑岩组成。所有外来体都是由三代褶皱和至少四代断层变形的;这些构造是由于晚侏罗世至第三纪的北西向逆冲作用而逐步形成的。
The Doonerak window in the central Brooks Range fold and thrust belt is a northeast-southwest–trending, doubly plunging antiform that is underlain by two duplexes:(1) the lower Doonerak duplex, consisting of slices of lower Paleozoic rocks; and (2) the higher Blarney Creek duplex, consisting primarily of slices of upper Paleozoic rocks. Overlying the latter is the Endicott Mountains allochthon, consisting of Devonian calcareous and clastic sedimentary rocks. The Endicott Mountains allochthon is continuous around the eastern end of the window, but it is breached by an outof-sequence thrust fault (Eekayruk fault). Overlying the Endicott Mountains allochthon is the Skajit allochthon, which consists of lower to mid-Paleozoic calcareous and clastic rocks. All allochthons were deformed by three generations of folds and at least four generations of faults; these structures formed progressively as the result of northwest-directed thrusting in Late Jurassic to Tertiary time.