scholarly journals Geologic correlation of the Himalayan orogen and Indian craton: Part 2. Structural geology, geochronology, and tectonic evolution of the Eastern Himalaya

2009 ◽  
Vol 122 (3-4) ◽  
pp. 360-395 ◽  
Author(s):  
A. Yin ◽  
C.S. Dubey ◽  
T.K. Kelty ◽  
A.A.G. Webb ◽  
T.M. Harrison ◽  
...  
Keyword(s):  
Structural Geology ◽  
Tectonic Evolution ◽  
Eastern Himalaya ◽  
Himalayan Orogen ◽  
Indian Craton

Influence of inherited Indian basement faults on the evolution of the Himalayan Orogen

2018 ◽  
Vol 481 (1) ◽  
pp. 251-276 ◽  
Author(s):  
Laurent Godin ◽  
Renaud Soucy La Roche ◽  
Lindsay Waffle ◽  
Lyal B. Harris
Keyword(s):  
Tectonic Evolution ◽  
Eastern Himalaya ◽  
Centrifuge Modelling ◽  
Himalayan Orogen ◽  
Basement Faults ◽  
Basement Fault ◽  
Indian Lithosphere ◽  
Metamorphic Core ◽  
The Himalaya ◽  
East West

AbstractIndian basement faults, which bound three orogen-perpendicular palaeotopographic ridges of Precambrian Indian basement south of the Himalaya, extend to the base of the Indian lithosphere and to the northern extent of the Indian lithosphere underneath Tibet. In the eastern Himalaya, the active orogen-perpendicular Yadong–Gulu graben is aligned with an earthquake-generating strike-slip fault in the high Himalaya. We argue that the graben results from crustal necking during reactivation of the underplated basement fault. In the central Himalaya, along-strike diachronous deformation and metamorphism within the Himalayan metamorphic core, as well as lateral ramps in the foreland thrust belt, spatially correspond to the Lucknow and Pokhara lineaments that bound the subsurface Faizabad Ridge in the Indian basement. Analogue centrifuge modelling confirms that offset along such deep-seated basement faults can affect the location, orientation and type of structures developed at various stages of orogenesis and suggests that it is mechanically feasible for strain to propagate through a melt-weakened mid-crust. We suggest that inherited Indian basement faults affect the ramp-flat geometry of the basal Main Himalayan Thrust, partition the Himalayan range into distinct zones, localize east–west extension resulting in the Tibetan graben and, ultimately, contribute to lateral variability in tectonic evolution along the orogen's strike.

High-Temperature Metamorphism, Anataxis and Tectonic Evolution of a Mafic Granulite from the Eastern Himalayan Orogen

2018 ◽  
Vol 29 (5) ◽  
pp. 1010-1025 ◽  
Author(s):  
Zeming Zhang ◽  
Huixia Ding ◽  
Xin Dong ◽  
Zuolin Tian ◽  
Dongyan Kang ◽  
...  
Keyword(s):  
High Temperature ◽  
Tectonic Evolution ◽  
Mafic Granulite ◽  
Himalayan Orogen ◽  
High Temperature Metamorphism

Leucogranites in Lhozag, southern Tibet: Implications for the tectonic evolution of the eastern Himalaya

Lithos ◽  
2017 ◽  
Vol 294-295 ◽  
pp. 246-262 ◽  
Author(s):  
Chunmei Huang ◽  
Zhidan Zhao ◽  
Guangming Li ◽  
Di-Cheng Zhu ◽  
Dong Liu ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Eastern Himalaya ◽  
Southern Tibet

Miocene high-temperature leucogranite magmatism in the Himalayan orogen

2020 ◽  
Author(s):  
Peng Gao ◽  
Yong-Fei Zheng ◽  
Matthew Jason Mayne ◽  
Zi-Fu Zhao
Keyword(s):  
High Temperature ◽  
Partial Melting ◽  
Plate Boundary ◽  
Source Rocks ◽  
Eastern Himalaya ◽  
Maximum Temperature ◽  
Himalayan Orogen ◽  
Metasedimentary Rocks ◽  
Se Tibet ◽  
Zircon Thermometry

Himalayan leucogranites of Cenozoic age are generally attributed to partial melting of metasedimentary rocks at low temperatures of <770 °C. It is unknown what the spatial distribution and characteristics of high-temperature (>800 °C) leucogranites are in the Himalayan orogen. The present study reports the occurrence of such leucogranites in the collisional orogen. We use the Ti-in-zircon thermometry in combination with the thermodynamically calibrated relationships of T-aSiO2-aTiO2 to retrieve crystallization temperatures of Miocene (ca. 17 Ma) two-mica granites from Yalaxiangbo, in the eastern Himalaya, SE Tibet. The results give the maximum temperature as high as ∼850 °C for granite crystallization, providing a significant constraint on the nature of thermal sources. Phase equilibrium modeling using metasedimentary rocks as the source rocks indicates that felsic melts produced at ∼850 °C and 6−10 kbar can best match the target leucogranites in lithochemistry. In this regard, the anatectic temperatures previously obtained for the production of Himalayan leucogranites would probably be underestimated to some extent. Such high temperatures are difficult to explain purely by the internal heating of the thickened orogenic crust. Instead, they require an extra heat source, which would probably be provided by upwelling of asthenospheric mantle subsequent to thinning of the orogenic lithospheric mantle by foundering along the convergent plate boundary. Therefore, the Himalayan leucogranites of Miocene age would be derived from partial melting of the metasedimentary rocks in the post-collisional stage.

Eocene–Oligocene granitoids in southern Tibet: Constraints on crustal anatexis and tectonic evolution of the Himalayan orogen

2012 ◽  
Vol 349-350 ◽  
pp. 38-52 ◽  
Author(s):  
Zeng-Qian Hou ◽  
Yuan-Chuan Zheng ◽  
Ling-Sen Zeng ◽  
Li-E Gao ◽  
Ke-Xian Huang ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Crustal Anatexis ◽  
Southern Tibet ◽  
Himalayan Orogen
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