Geology and paleoseismology of the Trans-Yamuna active fault system, Himalayan foothills of northwest India Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/6d570057n

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Satellite image interpretation, geologic mapping, and paleoseismic trenching are used to investigate the Trans-Yamuna active fault system in the northwestern Doon Valley of the Indian Himalayan foothills. This east-west fault system is subparallel to and crosses the Main Boundary thrust near the structural transition from the Nahan salient to the Dehra Dun reentrant. The Trans-Yamuna active fault system may terminate to the east at a lateral ramp of the Main Boundary thrust. A south-side-up, relatively linear fault trace with variable fault dips suggests that the fault system is high-angle reverse with a component of strike-slip. It is subdivided into the Sirmurital, Dhamaun, and Bharli faults, which probably connect at depth. The Dhamaun fault is exposed where it cuts the late Holocene upper Bhatrog terrace deposit of the Giri River. A paleoseismic investigation of the Sirmurital fault at another Giri River terrace did not expose the fault, but it suggests that late Holocene terrace deposits there may be folded into a syncline parallel to fault strike. The fold axis of the syncline continues into bedrock to the west. Earthquakes in 1905, 1803, or perhaps earlier may have been the source of folding of the fine-grained sediments within this terrace deposit. The Trans-Yamuna active fault system is a secondary hangingwall fault that may accommodate some strain release above the decollement during large-magnitude earthquakes. Strike-slip motion may be related to the lateral translation of the Karakoram fault block and east-west extension of the southern Tibet block as a result of oblique convergence between the Indian and Eurasian plates in the northwest Himalaya.
Resource Type
Date Available
Date Copyright
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Peer Reviewed
Language
Digitization Specifications
  • File scanned at 300 ppi (Monochrome, 24-bit Color) using Capture Perfect 3.0.82 on a Canon DR-9080C in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2012-09-20T18:04:38Z (GMT). No. of bitstreams: 1 OatneyEmilyM1999.pdf: 5934350 bytes, checksum: d76331ba9d574721251dcb73b8e5ea31 (MD5) Previous issue date: 1998-10-09
  • description.provenance : Submitted by Eric Hepler (ehscanner@gmail.com) on 2012-09-19T23:35:19Z No. of bitstreams: 1 OatneyEmilyM1999.pdf: 5934350 bytes, checksum: d76331ba9d574721251dcb73b8e5ea31 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-09-20T18:04:38Z (GMT) No. of bitstreams: 1 OatneyEmilyM1999.pdf: 5934350 bytes, checksum: d76331ba9d574721251dcb73b8e5ea31 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2012-09-20T18:02:36Z (GMT) No. of bitstreams: 1 OatneyEmilyM1999.pdf: 5934350 bytes, checksum: d76331ba9d574721251dcb73b8e5ea31 (MD5)

Relationships

In Administrative Set:
Last modified: 08/15/2017 Default
Citations:

EndNote | Zotero | Mendeley

Items