Polyphase deformation history of the “Tibetan Sedimentary Sequence” in the Himalayan chain (South-East Tibet)

Montomoli, Chiara; Appel, Erwin; Antolín, Borja; Dunkl, İstván; Bay, R. El; Ding, Lin; Gloaguen, Richard

doi:10.3126/hjs.v5i7.1285

Cited by 4 publications

(9 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the subsequent Neohimalayan (Hodges 2000) tectonic phase, north-facing folds with a related axial plane cleavage were developed (e.g. Carosi et al 2007;Montomoli et al 2008;Kellett & Godin 2009, Antolin et al 2011. In the study area these two deformation phases are well developed.…”

Section: Structural Setting Of the Tethyan Himalayamentioning

confidence: 94%

“…It is characterized by top-to-the-south thrust faults and south-facing folds (e.g. Burg & Chen 1984;Ratschbacher et al 1994;Carosi et al 2007;Aikman et al 2008;Montomoli et al 2008, Antolin et al 2011. During the subsequent Neohimalayan (Hodges 2000) tectonic phase, north-facing folds with a related axial plane cleavage were developed (e.g.…”

Section: Structural Setting Of the Tethyan Himalayamentioning

confidence: 97%

“…The strain of the D2 phase increases progressively towards the north at the point that S2 foliation transposes the S1 foliation in the northern more strained areas. S2 foliation is a crenulation cleavage in the southern sector with no dynamic recrystallization, whereas in the north, it is associated to dynamic recrystallization of chlorite, white mica, calcite, quartz and oxides (Montomoli et al 2008;Antolin et al 2011). Godin (2003) used cross-cutting relationships of the different structural elements and U -Pb geochronology to date the D2 fold structures in the Annapurna area as Oligocene.…”

Section: Structural Setting Of the Tethyan Himalayamentioning

confidence: 99%

“…The first one is widespread in the southern sector, whereas the second one is well-developed in the northern portion. Consequently, two structural domains have been distinguished by Montomoli et al (2008) and Antolin et al (2011).…”

Section: Structural Setting Of the Tethyan Himalayamentioning

confidence: 99%

“…The deformation of the flysch assemblage varies strongly along north -south profiles (e.g. Montomoli et al 2008;Antolin et al 2011) and the post-sedimentary overprint ranges from the diagenetic stage to greenschist and amphibolite facies. Thus, microscopic textures and mineral assemblages of samples from different structural domains vary from purely sediment to completely recrystallized schists (see Fig.…”

Section: Samplesmentioning

confidence: 99%

See 4 more Smart Citations

Metamorphic evolution of the Tethyan Himalayan flysch in SE Tibet

Dunkl

Antolín

Wemmer

et al. 2011

View full text Add to dashboard Cite

The metamorphic conditions and the age of thermal overprint were determined in meta-pelites, metaarenites and metabasites of the Tethyan Himalayan Sequence (THS) in SE Tibet using Kübler Index and vitrinite reflectance data and applying thermobarometrical (Thermocalc and PERPLEX) and geochronological methods (illite/muscovite K-Ar and zircon and apatite (U-Th)/He chronology). The multiple folded thrust pile experienced a thermal overprint reaching locally peak conditions between the diagenetic stage (c. 170 °C) and the amphibolite facies (c. 600 °C at 10 kbar). Burial diagenesis and heating due to Early Cretaceous dyke emplacement triggered the growth of illite in the metapelites. Eocene collision-related peak metamorphic conditions have been reached at c. 44 Ma. During collision the different tectonic blocks of the THS were tectonically buried to different structural levels so that they experienced maximum green-schist to amphibolite facies metamorphism. Later, during Oligocene to Miocene times the entire THS underwent anchi- to epizonal metamorphic conditions, probably associated to continuous deformation in the flysch fold-thrust-system. This period terminated at c. 24-22 Ma. Adjacent to the north Himalayan metamorphic domes, the base of the THS was metamorphosed during Miocene times (c. 13 Ma). Post-metamorphic cooling below c. 180 °C lasted until Late Miocene and took place at different times

show abstract