Structural Analysis in Shoufengsi Area of Tananao Complex, Eastern Taiwan

The subduction and collision boundaries of the Eurasia and Philippine Sea Plates in the Taiwan mountain belt expose a NE-trending coherent crustal section in the Tananao Complex. This study investigates the structures in three dimensions in the Shoufengsi area, which is located in the middle section...

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Main Author: Gong-Ruei Ho and Wei Lo
Format: Article
Language:English
Published: Springer 2015-01-01
Series:Terrestrial, Atmospheric and Oceanic Sciences
Subjects:
Online Access: http://tao.cgu.org.tw/pdf/v265p557.pdf
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author Gong-Ruei Ho and Wei Lo
author_facet Gong-Ruei Ho and Wei Lo
author_sort Gong-Ruei Ho and Wei Lo
collection DOAJ
description The subduction and collision boundaries of the Eurasia and Philippine Sea Plates in the Taiwan mountain belt expose a NE-trending coherent crustal section in the Tananao Complex. This study investigates the structures in three dimensions in the Shoufengsi area, which is located in the middle section of the Tananao Complex to understand the Taiwan orogeny mountain building processes. Detailed geological mapping and structural analyses shows the eastward shortening associated with metamorphism indicative of three deformation events. Three sets of axial plane foliation S1, S2, and S3 can be recognized by Type-1 and Type-3 fold interference patterns. Different structural characteristics can be further revealed in five domains based on domain analysis. Each domain shows the superposed process characteristics. Synthetic structural mapping and microstructure examination analyses on the Shoufengsi area show that NE-trending isoclinal folds and axial D1 and D2 plane foliation events represent shortening deformation and NW-trending crenulation cleavage. Normal D3 event faults display the gravity collapse deformation. These observations are consistent with shortening to extension stage predictions during Eurasia and Philippine Sea Plate collisions.
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spelling doaj.art-2f4634ea11eb4bb48f493a0b8c6e71e42022-12-22T01:56:17ZengSpringerTerrestrial, Atmospheric and Oceanic Sciences1017-08392311-76802015-01-0126555710.3319/TAO.2015.05.15.01(TT)1310Structural Analysis in Shoufengsi Area of Tananao Complex, Eastern TaiwanGong-Ruei Ho and Wei LoThe subduction and collision boundaries of the Eurasia and Philippine Sea Plates in the Taiwan mountain belt expose a NE-trending coherent crustal section in the Tananao Complex. This study investigates the structures in three dimensions in the Shoufengsi area, which is located in the middle section of the Tananao Complex to understand the Taiwan orogeny mountain building processes. Detailed geological mapping and structural analyses shows the eastward shortening associated with metamorphism indicative of three deformation events. Three sets of axial plane foliation S1, S2, and S3 can be recognized by Type-1 and Type-3 fold interference patterns. Different structural characteristics can be further revealed in five domains based on domain analysis. Each domain shows the superposed process characteristics. Synthetic structural mapping and microstructure examination analyses on the Shoufengsi area show that NE-trending isoclinal folds and axial D1 and D2 plane foliation events represent shortening deformation and NW-trending crenulation cleavage. Normal D3 event faults display the gravity collapse deformation. These observations are consistent with shortening to extension stage predictions during Eurasia and Philippine Sea Plate collisions. http://tao.cgu.org.tw/pdf/v265p557.pdf geophysicsgeologyatmospheric sciencespace scienceoceanic sciencehydrology
spellingShingle Gong-Ruei Ho and Wei Lo
Structural Analysis in Shoufengsi Area of Tananao Complex, Eastern Taiwan
Terrestrial, Atmospheric and Oceanic Sciences
geophysics
geology
atmospheric science
space science
oceanic science
hydrology
title Structural Analysis in Shoufengsi Area of Tananao Complex, Eastern Taiwan
title_full Structural Analysis in Shoufengsi Area of Tananao Complex, Eastern Taiwan
title_fullStr Structural Analysis in Shoufengsi Area of Tananao Complex, Eastern Taiwan
title_full_unstemmed Structural Analysis in Shoufengsi Area of Tananao Complex, Eastern Taiwan
title_short Structural Analysis in Shoufengsi Area of Tananao Complex, Eastern Taiwan
title_sort structural analysis in shoufengsi area of tananao complex eastern taiwan
topic geophysics
geology
atmospheric science
space science
oceanic science
hydrology
url http://tao.cgu.org.tw/pdf/v265p557.pdf
work_keys_str_mv AT gongrueihoandweilo structuralanalysisinshoufengsiareaoftananaocomplexeasterntaiwan