Field report:Exploring the Doonerak fenster of the central Brooks Range,Alaska,USA

作     者：Justin V.Strauss Carl W.Hoiland Lyle L.Nelson 

作者机构：Department of Earth SciencesDartmouth College Department of Geological SciencesStanford University Department of Earth and Planetary SciencesHarvard University 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2017年第8卷第4期

页      面：915-918页

核心收录：

学科分类：070904[理学-构造地质学] 0709[理学-地质学] 07[理学] 0708[理学-地球物理学] 

基　　金：supported by a Geological Society of America graduate student research grant,Harvard University,Dartmouth College a National Science Foundation(NSF) Tectonics grant (EAR-1624131) supported by a Stanford McGee Grantand a NSF Graduate Research Fellowship supported by Harvard University 

主　　题：Arctic Alaska Doonerak fenster Brooks Range Apoon assemblage 

摘      要：Arctic Alaska is a ＇suspect＇ terrane that encompasses approximately 20%of Alaska,stretching from the southern Brooks Range all the way to the continental shelves of the Chukchi and Beaufort *** the origin and subsequent travels of this large crustal fragment are debated among geologists,most researchers agree upon its composite nature and exotic *** constrain the early geological history of this terrane,we describe a recent expedition to the Doonerak fenster of the central Brooks *** area has long been regarded as a key locality for understanding the structural evolution of the Mesozoic-Cenozoic Brooks Range orogen;however,our target was different：a unique sequence of volcanic and siliciclastic rocks（Apoon assemblage） exposed beneath a profound pre-Mississippian unconformity,which we argue is of key importance to understanding the early Paleozoic tectonic history of northern Alaska and the greater Arctic.