加拿大Nemiscau省元沉积构造演化与U-Pb年代学:对苏必利尔省太古宙构造的启示

IF 1.3 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Canadian Journal of Earth Sciences Pub Date : 2022-09-27 DOI:10.1139/cjes-2022-0054

Rocio Pedreira Perez, A. Tremblay, Yannick Daoudène, J. David, D. Bandyayera

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引用次数: 1

摘要

Nemiscau亚省是太古宙东部的一个以变质沉积岩为主的层序。以往的构造和变质学研究表明，这是在克诺造山时期与邻近的深成陆块的俯冲相关、增生和碰撞构造作用的结果。本研究综合了多组构造、变质和U-Pb年代学资料，表明在约2843 ~ 2598 Ma之间存在一个长期的构造变质演化过程。太古代的非均变构造模式更充分地解释了Nemiscau盆地中保存的同步垂直和水平构造。

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Structural evolution and U-Pb geochronology of the metasedimentary Nemiscau subprovince, Canada: implications for Archean tectonics in the Superior Province

The Nemiscau subprovince is a metasedimentary rocks-dominated sequence of the eastern Archean Superior Province. Previous structural and metamorphic studies suggested that it was the result of subduction-related, accretionary and collisional tectonics with adjacent plutonic terranes during the Kenorean orogeny. This study integrates various sets of structural, metamorphic and U-Pb geochronological data suggesting a long-lasting tectonometamorphic evolution between ca. 2843 and 2598 Ma. A non-uniformitarian tectonic model for the Archean more adequately accounts for synchronous vertical and horizontal tectonism as preserved in the Nemiscau basin.

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来源期刊

Canadian Journal of Earth Sciences 地学-地球科学综合

CiteScore

2.80

自引率

7.10%

发文量

审稿时长

6-12 weeks

期刊介绍： The Canadian Journal of Earth Sciences reports current research in climate and environmental geoscience; geoarchaeology and forensic geoscience; geochronology and geochemistry; geophysics; GIS and geomatics; hydrology; mineralogy and petrology; mining and engineering geology; ore deposits and economic geology; paleontology, petroleum geology and basin analysis; physical geography and Quaternary geoscience; planetary geoscience; sedimentology and stratigraphy; soil sciences; and structural geology and tectonics. It also publishes special issues that focus on information and studies about a particular segment of earth sciences.