Author: Toni HagenPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Report on the Geological Survey of Nepal: Geology of the Thakkhola including adjacent areas. - 1968
Author: Toni HagenReport on the Geological Survey of Nepal. [
Author: Toni HagenPublisher:
ISBN:
Category : Geological surveys
Languages : en
Pages : 8
Book Description
New Ideas on the Geology of the Thakkhola (Nepal Himalaya)
Author: Structural Evolution of Thakkhola Graben
Author: Thomas BaltzPublisher:
ISBN:
Category : Geology
Languages : en
Pages :
Book Description
The Thakkhola Graben of central Nepal is one of several north-south-trending rifts and grabens throughout the Himalayan hinterland and southern Tibet. The faults bounding the graben run from the crest of the Himalayas at the Annapurna and Dhaulagiri Ranges to the suture between India and Asia. This suture is reported to separate two disparate stress regimes, arc-perpendicular compression in the Nepal Himalayas to the south and arc-parallel extension in the Tibetan Plateau to the north. However, two lines of evidence suggest the India-Asia Suture no longer functions as a structural boundary between these stress fields: (1) the Lopukangri Rift cuts and offsets the suture, and (2) the Thakkhola Graben is located south of the suture. Despite decades of research in the Thakkhola Graben, an accurate account of fault geometry and kinematics has yet to be presented. Therefore its relationship to extensional structures in Tibet and its role in Himalayan tectonics is undetermined. Field mapping, combined with kinematic modeling and reconstruction of offset piercing points, has confined the geometry and kinematics of the faults bounding the Thakkhola Graben. The western boundary of the graben is the Dangardzang Fault and the eastern boundary is the Muktinath Fault, both of which are steeply dipping and cut down into the middle crust. The Dangardzang Fault consists of two parallel fault strands, with the easternmost accommodating the majority of strain. This fault has accommodated 4.5 kilometers of dip-slip displacement, 5.3 kilometers of dextral strike-slip displacement, and 1.4 kilometers of horizontal extension. The Muktinath Fault consists of one dominant fault strand with several subsidiary faults of lesser magnitude. This fault has accommodated 4.2 kilometers of dip-slip displacement, 1.9 kilometers of sinistral strike-slip displacement, and 0.8 kilometers of horizontal extension. Comparison of the Thakkhola Graben with the Lopukangri Rift to the north shows both of these structures share similar fault geometries, magnitudes of slip, and kinematics. This relationship implies the same stress field is active on both sides of the India-Asia Suture and therefore, in this region it no longer operates as a structural boundary between the Himalayas and Tibet.
Geology of Nepal Himalaya and Adjacent Countries
Author: Chandra K. SharmaPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 524
Book Description
Geology of the Nepal Himalaya
Author: Megh Raj DhitalPublisher: Springer
ISBN: 3319024965
Category : Science
Languages : en
Pages : 499
Book Description
This book addresses the geology of the entire Himalayan range in Nepal, i.e., from the Gangetic plain in the south to the Tethyan zone in the north. Without a comprehensive look at the various Himalayan zones, it is practically impossible to fully grasp the processes at work behind the formation and development of the spectacular Himalaya. However, the goal is not merely to document all the scientific ontology but rather to reveal a sound basis for the prevailing concepts. Both the early literature on Himalayan geology and contemporary trends are fully covered. For the first time, the origin, use, and abuse of common Himalayan geological terms such as the Siwaliks, Lesser Himalaya, Main Boundary Thrust, Main Central Thrust, and Tethys are discussed. The book will help readers to progress from a cognitive approach to a constructive one by linking various types of knowledge, such as seeking relations between various geological structures as well as between earlier thoughts or views and contemporary approaches.
Report on the Geological Survey of Nepal
Author: Toni HagenPublisher:
ISBN:
Category : Geological surveys
Languages : en
Pages :
Book Description
Geology of Taplejung Area, Taplejung District
Author: R. P. BashyalA Sketch of the Geography and Geology of the Himalaya Mountains and Tibet
Author: Sir Sidney Gerald BurrardPublisher:
ISBN:
Category : Geology
Languages : en
Pages : 492
Book Description
A Sketch of the Geography and Geology of the Himalaya Mountains and Tibet
Author: Sir Sidney Gerald BurrardPublisher:
ISBN:
Category : Geography
Languages : en
Pages : 422
Book Description