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DOI	10.1007/s00531-018-1654-2
	The 3D geometry of the Naxos detachment fault and the three-dimensional tectonic architecture of the Naxos metamorphic core complex; Aegean Sea; Greece
	Linnros H.; Hansman R.; Ring U.
发表日期	2019
ISSN	14373254
起始页码	287
结束页码	300
卷号	108 期号:1
英文摘要	We reconstruct the three-dimensional (3D) geometry of the Naxos detachment fault and quantify E–W shortening associated with strong N–S extensional deformation. In addition, 3D reconstruction of the detachment indicates how it interacted with the underlying metamorphic sequence, as well as a set of concentric metamorphic isograds that formed during extensional deformation. For doing so, we used the software MOVE™ (Midland Valley Ltd.) to develop a 3D model of the Naxos metamorphic core complex (NCC) and the Naxos detachment fault. The model is constrained by structural data, metamorphic isograds, and fission-track ages from the footwall of the NCC. Our analysis shows that greater minimum amounts of E–W shortening correlate with higher metamorphic grade, ranging from 6 to 10% outside the migmatite dome and up to 17% within the migmatite dome. The metamorphic isograds around the migmatite dome are less intensely folded by E–W shortening than the lithologic layering. We conclude that this is because the isograd surfaces “froze-in” after folding had already started. Our model indicates that the isograds are cut by the brittle detachment, demonstrating that the final stages of top-to-the-NNE extension outlasted the formation of the metamorphic dome and the isograds. Despite some limitations of the 3D model, the outlined geometric reconstruction of a major extensional fault system in the central Aegean highlights: (1) the interplay between large-scale extension and temperature-dependant shortening perpendicular to the extension direction, (2) the evolution of metamorphism and migmatization, (3) the formation of metamorphic isograds, and (4) granitoid intrusions during extension and exhumation. © 2018, The Author(s).
英文关键词	Aegean Sea; Extension/shortening; Fission-track ages; Greece; Metamorphic isograds; Naxos metamorphic core complex; Three-dimensional tectonic model
语种	英语
scopus关键词	deformation; detachment fault; fission track dating; granitoid; migmatization; tectonic setting; three-dimensional modeling; Aegean Sea; Greece; Mediterranean Sea
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147890
作者单位	Department of Geological Sciences, Stockholm University, Stockholm, 10692, Sweden
推荐引用方式 GB/T 7714	Linnros H.,Hansman R.,Ring U.. The 3D geometry of the Naxos detachment fault and the three-dimensional tectonic architecture of the Naxos metamorphic core complex; Aegean Sea; Greece[J],2019,108(1).
APA	Linnros H.,Hansman R.,&Ring U..(2019).The 3D geometry of the Naxos detachment fault and the three-dimensional tectonic architecture of the Naxos metamorphic core complex; Aegean Sea; Greece.International Journal of Earth Sciences,108(1).
MLA	Linnros H.,et al."The 3D geometry of the Naxos detachment fault and the three-dimensional tectonic architecture of the Naxos metamorphic core complex; Aegean Sea; Greece".International Journal of Earth Sciences 108.1(2019).