Coupled Rapid Erosion and Foreland Sedimentation Control Orogenic Wedge Kinematics in the Himalayan Thrust Belt of Central Nepal

2021 ◽  
Author(s):  
P. G. DeCelles ◽  
B. Carrapa
Keyword(s):  
Thrust Belt ◽  
Central Nepal ◽  
Orogenic Wedge

Analogue modeling of the role of multi-level decollement layers on the geometry of orogenic wedge: an application to the Zagros Fold–Thrust Belt, SW Iran

2017 ◽  
Vol 106 (8) ◽  
pp. 2837-2853 ◽  
Author(s):  
Mostafa Ghanadian ◽  
Ali Faghih ◽  
Bernhard Grasemann ◽  
Iraj Abdollahie Fard ◽  
Mehrdad Maleki
Keyword(s):  
Thrust Belt ◽  
Analogue Modeling ◽  
Orogenic Wedge ◽  
Sw Iran ◽  
Multi Level

scholarly journals Geological setting and lithostratigraphy of the Lesser Himalaya in the Mugling-Banspani area, central Nepal

2011 ◽  
Vol 42 ◽  
pp. 51-63
Author(s):  
K. R. Paudyal ◽  
L. P. Paudel
Keyword(s):  
Geological Mapping ◽  
Low Grade ◽  
Thrust Belt ◽  
Lesser Himalaya ◽  
Geological Structures ◽  
Metasedimentary Rocks ◽  
Geological Setting ◽  
Central Nepal ◽  
Fold And Thrust Belt

The Lesser Himalaya in central Nepal is a fold-and-thrust belt with a complex stratigraphy and structure. In the present study, detailed geological mapping was carried out in the Mugling-Banspani area based on stratigraphic units proposed by Stocklin and Bhattarai (1977) to reveal the geological setting and lithostratigraphy of the area. The study shows that the area is occupied by the low-grade metasedimentary rocks of the Lower Nawakot Group. However, there are several discrepancies in classification of the rocks of the Lower Nawakot Group and their classification does not correspond with the field realities. The Anpu Quartzite thought to be the oldest unit of the Nawakot Complex laterally joins to the Fagfog Quartzite. Similarly, the Banspani Quartzite and Labdi Phyllite laterally join to the Purebensi Qu artzite and Dandagao n Phyllite, respectively. Si milar ly, the Nourpul Formation is clearly divisible into three members with distinct lithological characteristics. Based on the above facts, a revise d stratigraphic classification has been proposed for the rocks of the Lower Nawakot Group in the Mugling­ Banspani area. The Lower Nawakot Group can be divided into the oldest Kunchha Formation followed up section by the Fagfog Quartzite (~Anpu Quartzite), Dandagaon Phyllite (~Labdi Phyllite), Nourpul Formation and Dhading Dolomite. The Nourpul Formation comprises three members namely the Purebensi Quartzite, the Amdanda Phyllite and the Labdi Khola Carbonate. The Jalbire Syncline, Mugling Anticline, Aklang Syncline and the Anpu Anticline are the major geological structures of the study area.

The Greater Himalayan Thrust Belt: Insight Into the Assembly of the Exhumed Himalayan Metamorphic Core, Modi Khola Valley, Central Nepal

Tectonics ◽  
2020 ◽  
Vol 39 (9) ◽  
Author(s):  
Sudip Shrestha ◽  
Kyle P. Larson ◽  
Aaron J. Martin ◽  
Carl Guilmette ◽  
Matthijs A. Smit ◽  
...  
Keyword(s):  
Thrust Belt ◽  
Central Nepal ◽  
Metamorphic Core ◽  
Insight Into

Construction of the Lesser Himalayan–Subhimalayan thrust belt: The primary driver of thickening, exhumation, and high elevations in the Himalayan orogen since the middle Miocene

Geology ◽  
2021 ◽  
Author(s):  
Sean P. Long ◽  
Delores M. Robinson
Keyword(s):  
Cross Sections ◽  
Middle Miocene ◽  
Structural Evolution ◽  
Crustal Thickening ◽  
Thrust Belt ◽  
Himalayan Orogen ◽  
Orogenic Wedge ◽  
Primary Driver ◽  
Thrust Sheets ◽  
High Elevations

Documenting the structural evolution of the Himalayan orogen is fundamental for understanding the dynamics of collisional orogenesis. We argue that the importance of deformation in the frontal, Lesser Himalayan–Subhimalayan (LH-SH) portion of the Himalayan thrust belt for driving crustal thickening over the past ~15–13 m.y. has long been overlooked. To quantify its contribution to thickening, we measured parameters from 22 published cross sections that span the length of the orogen. The mean structural uplift accomplished by the LH-SH thrust belt increases from 10–15 km in the eastern half of the orogen to 15–23 km in the western half. An antiformal culmination constructed by LH duplexing is observed across the orogen and increases in structural height (to as much as 15–20 km) and north-south width moving westward. Construction of the culmination was the primary mechanism for building and maintaining wedge taper. The westward scaling of culmination size is accompanied by doubling and tripling of LH-SH shortening and accretion magnitude, respectively; when combined with a consistent orogen-wide modern taper angle (11° ± 2°), this indicates that duplexing facilitated the growth of an overall larger orogenic wedge moving westward. Following the initial southward propagation of deformation into LH rocks at ca. 15–13 Ma, the Himalayan orogenic wedge has been characterized by stacking of multiple thin, smalldisplacement thrust sheets to develop a high-taper orogenic wedge. Thus, LH-SH deformation has had a profound effect on driving thickening, exhumation, and the attainment of high elevations since the middle Miocene.

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