NW-SE trend of the Orcheon Orogen: evidence for NE-SW shortening

Lee, Hyun-Woo (2000) NW-SE trend of the Orcheon Orogen: evidence for NE-SW shortening. Geoscience Canada, 4. pp. 14-18.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only



The fragility of structures in rocks that have been multiply deformed commonly results in geometries that are too complex, or sometimes too simple, to readily allow a structural geologist to reconstruct the complete deformation history of a rock. Complexities are commonly overlooked, or ignored because they are attributed to heterogenieties in the flow field. Presence of NW-SE-trending structures has previously been recognized by several researchers at different places in the NE-SW-trending Ogcheon Orogen (Fig. 1; Reedman et al., 1973; Cluzel et al., 1991; Ihm and Chang, 1993; Koh and Kim, 1995). It has been considered that these structures have resulted from the development of heterogeneous strain, such as sheath-like folding (e.g. Cluzel et al., 1991) or a convergent shear flow resulting in oblique fold (Koh and Kim, 1995) during a series of progressive NW-SE bulk shortening events. However, recent palaeomagnetic work on the Ogcheon Supergroup (Lee et al., 1997) suggests that there was NE-SW directed tectonism in East Asia (e.g. Liu, 1993; Yin and Nie, 1993). Plus, Lee (1999) has documented NW-SE-trending structures appearing in some places at variable scales in the Ogcheon Orogen and reassesses the tectonic history of the Ogcheon Orogen.

Item ID: 12870
Item Type: Article (Research - C1)
ISSN: 0315-0941
Related URLs:
Date Deposited: 10 Dec 2012 23:17
FoR Codes: 04 EARTH SCIENCES > 0403 Geology > 040312 Structural Geology @ 100%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970104 Expanding Knowledge in the Earth Sciences @ 100%
Downloads: Total: 4
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page