Polystage deformation of the Gaoligong metamorphic zone: Structures, 40Ar/39Ar mica ages, and tectonic implications

The Xuelongshan high strain zone: Cenozoic structural evolution and implications for fault linkages and deformation along the Ailao Shan–Red River shear zone

“…9A, B), as in the BiluoxueshaneChongshan and Gaoligong zones (Cao et al, 2011;Zhang et al, 2012). In the metamorphic rocks of the Xuelongshan dome, the D1 deformation is recorded as a mylonitic structure, characterized by asymmetric folded foliations (S1), centimeterescale SeC textures in the schists (Fig.…”

“…(B) The principal fault system, KarakorameJialieAilao ShaneRed River fault, extending and curving around the EHS region (Tapponnier et al, 1990;Searle, 2006Searle, , 2007. (C) A regional profile AeB across the Gaoligong, Biluoxueshan, and Xuelongshan ranges is shown (Zhang et al, 2010;Zhang et al, 2012). Xu et al, 2012).…”

Magnitude and symmetry of seismic anisotropy in mica‐ and amphibole‐bearing metamorphic rocks and implications for tectonic interpretation of seismic data from the southeast Tibetan Plateau

“…Schist, felsic gneiss, and amphibolite are three major constituents of the southeast Tibetan Plateau, occupying over 95% of the metamorphic terranes of the west Yunnan (i.e., the region of three rivers: Nujiang, Lancangjiang, and Red River). In this region (Figure ), the Gaoligong shear zone [e.g., Ji et al , ; Lin et al , ; Socquet and Pubellier , ; Wang et al , ; Zhang et al , ], Lancangjiang shear zone [e.g., Akciz et al , ; Zhang et al , ], and Ailao Shan‐Red River shear zone [e.g., Leloup et al , ; Tapponnier et al , ; Wu et al , ] have been the subject of many detailed investigations of the extrusion tectonics resulting from the collision of India with Eurasia [e.g., Huchon et al , ; Tapponnier et al , ]. The schists have protoliths ranging from shale, mudstone, and siltstone to mafic volcanics and volcanoclastic sediments, which were folded into tight to isoclinal folds with upright axial surfaces and horizontal to subhorizontal hinge lines.…”

Multiple partial melting events in the Ailao Shan–Red River and Gaoligong Shan complex belts, SE Tibetan Plateau: Zircon U–Pb dating of granitic leucosomes within migmatites

“…Lin et al (2009) conducted a comprehensive 40 Ar/ 39 Ar geochronological study of the GS complex belt to obtain a better understanding of crustal deformation and tectonic evolution around the Eastern Himalayan Syntaxis and showed that the main phase of deformation in the GS complex belt occurred from 18 to 13 Ma. Zhang et al (2012) considered that ductile strike-slip shearing occurred in the GS belt at Miocene , and continued to the Late Miocene (11-10 Ma).…”