Artigo Revisado por pares

Timing of an extensional detachment during convergent orogeny: New Rb-Sr geochronological data from the Zanskar shear zone, northwestern Himalaya

1998; Geological Society of America; Volume: 26; Issue: 3 Linguagem: Inglês

10.1130/0091-7613(1998)026 2.3.co;2

ISSN

1943-2682

Autores

Simon Inger,

Tópico(s)

High-pressure geophysics and materials

Resumo

Research Article| March 01, 1998 Timing of an extensional detachment during convergent orogeny: New Rb-Sr geochronological data from the Zanskar shear zone, northwestern Himalaya Simon Inger Simon Inger 1School of Earth Sciences, University of Leeds, Leeds LS2 9JT, United Kingdom Search for other works by this author on: GSW Google Scholar Geology (1998) 26 (3): 223–226. https://doi.org/10.1130/0091-7613(1998)026 2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Simon Inger; Timing of an extensional detachment during convergent orogeny: New Rb-Sr geochronological data from the Zanskar shear zone, northwestern Himalaya. Geology 1998;; 26 (3): 223–226. doi: https://doi.org/10.1130/0091-7613(1998)026 2.3.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The Zanskar shear zone of northwest India forms the western segment of the South Tibetan detachment system, a north-dipping normal fault and shear zone that unroofed high-grade metamorphic rocks during contraction of the Himalayan orogen. New Rb-Sr mineral ages from the shear zone and its footwall show that ductile deformation was ongoing at 26 Ma, and continued to 16 Ma in some sections. The nature of the deformation varies along strike; displacement at 25 Ma or earlier in the western section did not result in a large thermal offset. By contrast, the sections to the east display substantial ductile thinning at midcrustal levels that was superseded by brittle detachments as the system continued to exhume rocks of the High Himalayan crystalline sequence. The implication is that the Zanskar shear zone may have had a smaller offset in the west and cut down-section to the east. The time of the bulk of the deformation of this structure is determined to be similar to that of the equivalent structure in most of the eastern and central Himalaya. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.

Referência(s)
Altmetric
PlumX