DOI: 10.1007/s00531-015-1259-y
Scopus记录号: 2-s2.0-84945251891
论文题名: Strain and flow in the metamorphic core complex of Ios Island (Cyclades, Greece)
作者: Mizera M. ; Behrmann J.H.
刊名: International Journal of Earth Sciences
ISSN: 14373254
出版年: 2016
卷: 105, 期: 7 起始页码: 2097
结束页码: 2110
语种: 英语
英文关键词: Aegean Sea
; Detachment
; Ios
; Metamorphic core complex
; South Cyclades Shear Zone
; Thrust
Scopus关键词: augen gneiss
; detachment fault
; exhumation
; extensional tectonics
; footwall
; kinematics
; shear zone
; strain
; thrust
; Aegean Sea
; Cyclades
; Greece
; Ios
; Mediterranean Sea
; Santorini [Southern Aegean]
; Southern Aegean
英文摘要:
We have analysed strain and flow kinematics in the footwall of the South Cyclades Shear Zone (SCSZ), an important tectonic boundary within the Attic-Cycladic Crystalline Complex exposed on Ios Island, Cyclades, Aegean Sea. Coarse-grained augen gneisses in the basement unit flooring the SCSZ and forming a metamorphic core complex are excellently suited to measure finite strain using the Fry method and estimate the vorticity number (Wk) of flow with the “blocked-object” method. The results show that Oligo-Miocene exhumation of the basement unit during extension brought approximately 70 % N–S crustal stretching and up to 40 % subvertical shortening in a plane strain environment (k = 0.99). Linear down-section strain decrease constrains a zone of contact deformation of the SCSZ of about 1.5 km thick. Kinematic vorticity number estimates suggest little deviation from pure shear (Wk = 0.26). Finite strain and Wk are not correlated, indicating that the Ios basement and the overlying cover units were stretched compatibly. While the SCSZ is a localized zone of high strain, net displacement, however, may be restricted to about ten kilometres. This has important repercussions on large-scale tectonic models for extension in the Aegean. © 2015, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945251891&doi=10.1007%2fs00531-015-1259-y&partnerID=40&md5=a4c53400f53bf7d089e7cdc218377257
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70115
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Institut für Geowissenschaften, Christian-Albrechts-Universität, Ludewig-Meyn-Str. 10, Kiel, Germany; GEOMAR Helmholtz-Zentrum für Ozeanforschung, Wischhofstr. 1-3, Kiel, Germany; School of Geography, Environment, and Earth Sciences, Victoria University of Wellington, Cotton Building, CO418, Kelburn Campus, Wellington, New Zealand
Recommended Citation:
Mizera M.,Behrmann J.H.. Strain and flow in the metamorphic core complex of Ios Island (Cyclades, Greece)[J]. International Journal of Earth Sciences,2016-01-01,105(7)