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The Geodynamic Evolution of Iran
Annual Review of Earth and Planetary Sciences ( IF 14.9 ) Pub Date : 2021-05-28 , DOI: 10.1146/annurev-earth-071620-052109
Robert J. Stern 1 , Hadi Shafaii Moghadam 2 , Mortaza Pirouz 1 , Walter Mooney 3
Affiliation  

Iran is a remarkable geoscientific laboratory where the full range of processes that form and modify the continental crust can be studied. Iran's crustal nucleus formed as a magmatic arc above an S-dipping subduction zone on the northern margin of Gondwana 600–500 Ma. This nucleus rifted and drifted north to be accreted to SW Eurasia ∼250 Ma. A new, N-dipping subduction zone formed ∼100 Ma along ∼3,000 km of the SW Eurasian margin, including Iran's southern flank; this is when most of Iran's many ophiolites formed. Iran evolved as an extensional continental arc in Paleogene time (66–23 Ma) and began colliding with Arabia ∼25 Ma. Today, Iran is an example of a convergent plate margin in the early stages of continent-continent collision, with a waning magmatic arc behind (north of) a large and growing accretionary prism, the Zagros Fold-and-Thrust Belt. Iran's crustal evolution resulted in both significant economic resources and earthquake hazards.

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Iran is a natural laboratory for studying how convergent plate margins form, evolve, and behave during the early stages of continental collision.

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Iran formed in the past 600 million years, originating on the northern flank of Gondwana, rifting away, and accreting to SW Eurasia.

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Iran is actively deforming as a result of collision with the Arabian plate, but earthquakes do not outline the position of the subducting slab.

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The Cenozoic evolution of Iran preserves the main elements of a convergent plate margin, including foredeep (trench), accretionary prism, and magmatic arc.



中文翻译:

伊朗的地球动力学演化

伊朗是一个了不起的地球科学实验室,可以研究形成和修饰大陆壳的所有过程。伊朗的地壳核在冈瓦纳大陆 600-500 Ma 北缘 S 倾斜俯冲带上方形成为岩浆弧。这个核裂开并向北漂移,被吸积到欧亚大陆西南部~250 Ma。沿着约 3,000 公里的欧亚西缘,包括伊朗的南翼,形成了约 100 Ma 的新的 N 倾斜俯冲带;这是伊朗众多蛇绿岩中大部分形成的时候。伊朗在古近纪时期(66-23 Ma)演化为一个伸展大陆弧,并开始与阿拉伯〜25 Ma碰撞。今天,伊朗是大陆与大陆碰撞早期阶段会聚板块边缘的一个例子,在一个大且不断增长的增生棱柱后面(以北)有一条逐渐减弱的岩浆弧,Zagros折叠推力带。伊朗的地壳演化导致了重要的经济资源和地震灾害。

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伊朗是研究天然板块边缘在大陆碰撞早期阶段如何形成,演化和行为的天然实验室。

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伊朗在过去 6 亿年形成,起源于冈瓦纳大陆的北翼,裂开并吸积到欧亚大陆西南部。

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由于与阿拉伯板块碰撞,伊朗正在积极变形,但地震并没有勾勒出俯冲板块的位置。

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伊朗新生代演化保留了会聚板块边缘的主要元素,包括前渊(海沟)、增生棱柱和岩浆弧。

更新日期:2021-05-30
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