Paleotectonic and paleogeographic history of the Arctic region

IF 1.2 4区 地球科学 Q2 GEOLOGY
Ronald Blakey
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引用次数: 12

Abstract

Paleogeographic maps represent the ultimate synthesis of complex and extensive geologic data and express pictorially the hypothetical landscape of some region during a given time-slice of deep geologic time. Such maps, presented as paired paleogeographic and paleotectonic reconstructions, have been developed to portray the geologic history of the greater Arctic region over the past 400 million years. Collectively they depict four major episodes in the development of the Arctic region. The first episode witnessed early and middle Paleozoic terrane assembly and accretion during the Caledonian and Ellesmerian orogenies, which brought together many pieces of the Arctic collage along the northern margin of Laurussia. During the second phase, the assembly of Pangea in the late Paleozoic joined Siberia to Laurussia, an entity that became Laurasia during the subsequent break-up of Pangea. Then, Mesozoic subduction and terrane accretion constructed the Cordilleran margin and opened the Canada Basin. Finally, Cenozoic North Atlantic sea-floor spreading fully opened the Arctic Ocean.
北极地区的古构造和古地理史
古地理图是对复杂而广泛的地质资料的最终综合,它以图画的形式表达了某一地区在给定的深地质时期的假想景观。这样的地图,以古地理和古构造重建的方式呈现,已经被开发出来描绘过去4亿年大北极地区的地质历史。它们共同描绘了北极地区发展的四个主要时期。第一阶段见证了早古生代和中古生代加里东和埃尔斯默里造山运动期间的地体组合和增生,这些造山运动将许多北极拼贴物聚集在一起,形成了Laurussia北缘。在第二阶段,晚古生代的盘古大陆将西伯利亚与月桂洲合并,在随后的盘古大陆分裂中成为月桂洲。随后,中生代俯冲和陆块增生形成了科迪勒拉边缘,打开了加拿大盆地。最后,新生代北大西洋海底扩张完全打开了北冰洋。
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来源期刊
Atlantic Geology
Atlantic Geology GEOLOGY-
CiteScore
2.10
自引率
18.80%
发文量
0
审稿时长
>12 weeks
期刊介绍: Atlantic Geology (originally Maritime Sediments, subsequently Maritime Sediments and Atlantic Geology) covers all aspects of the geology of the North Atlantic region. It publishes papers, notes, and discussions on original research and review papers, where appropriate to the regional geology.
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