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Zanskar shear zone

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Journal Article

Switch from thrusting to normal shearing in the Zanskar shear zone, NW Himalaya: Implications for channel flow

Melanie Finch, Pavlína Hasalová, Roberto F. Weinberg, C. Mark Fanning
Journal: GSA Bulletin
Published: 01 July 2014
GSA Bulletin (2014) 126 (7-8): 892–924.
DOI: https://doi.org/10.1130/B30817.1
...Melanie Finch; Pavlína Hasalová; Roberto F. Weinberg; C. Mark Fanning Abstract The Zanskar shear zone is a ductile, normal-sense shear zone that exploited the contact between the High Himalayan Crystalline series and the Tethyan sedimentary series. The Zanskar shear zone is an extension...
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View PDF for article title, Switch from thrusting to normal <span class="search-highlight">shearing</span> in the <span class="search-highlight">Zanskar</span> <span class="search-highlight">shear</span> <span class="search-highlight">zone</span>, NW Himalaya: Implications for channel flow
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Journal Article

Synorogenic extension: Quantitative constraints on the age and displacement of the Zanskar shear zone (northwest Himalaya)

P. J. Dézes, J.-C. Vannay, A. Steck, F. Bussy, M. Cosca
Journal: GSA Bulletin
Published: 01 March 1999
GSA Bulletin (1999) 111 (3): 364–374.
DOI: https://doi.org/10.1130/0016-7606(1999)111<0364:SEQCOT>2.3.CO;2
...P. J. Dézes; J.-C. Vannay; A. Steck; F. Bussy; M. Cosca Abstract Structural, thermobarometric, and geochronological data place limits on the age and tectonic displacement along the Zanskar shear zone, a major north-dipping synorogenic extensional structure separating the high-grade metamorphic...
View PDF for article title, Synorogenic extension: Quantitative constraints on the age and displacement of the <span class="search-highlight">Zanskar</span> <span class="search-highlight">shear</span> <span class="search-highlight">zone</span> (northwest Himalaya)
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Journal Article

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

Simon Inger
Journal: Geology
Published: 01 March 1998
Geology (1998) 26 (3): 223–226.
DOI: https://doi.org/10.1130/0091-7613(1998)026<0223:TOAEDD>2.3.CO;2
...Simon Inger 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...
View PDF for article title, Timing of an extensional detachment during convergent orogeny: New Rb-Sr geochronological data from the <span class="search-highlight">Zanskar</span> <span class="search-highlight">shear</span> <span class="search-highlight">zone</span>, northwestern Himalaya
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Add to Citation Manager for Timing of an extensional detachment during convergent orogeny: New Rb-Sr geochronological data from the <span class="search-highlight">Zanskar</span> <span class="search-highlight">shear</span> <span class="search-highlight">zone</span>, northwestern Himalaya
Journal Article

Metamorphism and Structural Interpretation of the Zanskar Shear Zone, PJW Himalaya, India

Joyanto Routh
Published: 01 March 1993
Jour. Geol. Soc. India (1993) 41 (3): 187–198.
DOI: https://doi.org/10.17491/jgsi/1993/410301
...Joyanto Routh Abstract Herren in 1987, reported normal faults resulted in the telescoping of metamorphic isograds within a 200 meter zone between Sumche Topko to Mulung Topko in the Zanskar Shear Zone NW Himalaya. However petrographic study-of sections obtained from Mulung Topko and surrounding...
View PDF for article title, Metamorphism and Structural Interpretation of the <span class="search-highlight">Zanskar</span> <span class="search-highlight">Shear</span> <span class="search-highlight">Zone</span>, PJW Himalaya, India
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Journal Article

Zanskar shear zone: Northeast-southwest extension within the Higher Himalayas (Ladakh, India)

Eveline Herren
Journal: Geology
Published: 01 May 1987
Geology (1987) 15 (5): 409–413.
DOI: https://doi.org/10.1130/0091-7613(1987)15<409:ZSZNEW>2.0.CO;2
... was accompanied by prograde regional metamorphism. The metamorphism ranges from low-grade (anchimetamorphism) in the Indus suture zone in the northeast to upper amphibolite grade in the Higher Himalaya tectonic unit in the southwest. In the Zanskar area a well-exposed and morphologically prominent shear zone...
View PDF for article title, <span class="search-highlight">Zanskar</span> <span class="search-highlight">shear</span> <span class="search-highlight">zone</span>: Northeast-southwest extension within the Higher Himalayas (Ladakh, India)
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Image
Schematic cross section of the Zanskar shear zone. Note transition from top-to-the-SW thrusting in the footwall (domain 1), to normal top-to-the-NE shearing in the Zanskar shear zone (domain 2a), to top-to-the-SW folding and thrusting in the hanging wall (domain 4). Transition zone between the Zanskar shear zone and hanging wall is an area where both thrusting and normal shearing are evident, but overprinting relationships are unclear. Legend is the same as in Figures 2 and 4.

Schematic cross section of the Zanskar shear zone. Note transition from top...

Published: 01 July 2014
Figure 3. Schematic cross section of the Zanskar shear zone. Note transition from top-to-the-SW thrusting in the footwall (domain 1), to normal top-to-the-NE shearing in the Zanskar shear zone (domain 2a), to top-to-the-SW folding and thrusting in the hanging wall (domain 4). Transition zone
Image
Characteristic structures of the Zanskar shear zone footwall in domain 1. (A) Mafic orthogneiss lithon inside porphyritic orthogneiss shows normal top-to-the-NE shearing (white arrows; locality ZNK134). Rectangles mark position of photographs in B, C, and D. (B) Detail of mafic lithon with normal shearing at its margin and in surroundings, and thrusting preserved in lithon core. (C) K-feldspar porphyroblasts in mafic orthogneiss with asymmetric tails indicative of normal top-to-the-NE normal shearing. (D) Porphyroblasts of K-feldspar with asymmetric tails indicating top-to-the-SW thrusting in the core of mafic lithon. (E) Top-to-the-SW thrusting (black lines) overprinted by normal movement (white dashed line) recorded by a Tur-Grt-Ms-Bt leucogranite (locality ZNK119). (F) Top-to-the-SW thrusting of garnet-bearing leucosome in mylonitic orthogneiss indicative of crustal anatexis before or during thrusting (locality ZNK119). Grt—garnet. Insets depict observed structures. Vertical walls in all photographs are oriented subparallel to stretching lineation.

Characteristic structures of the Zanskar shear zone footwall in domain 1. (...

Published: 01 July 2014
Figure 5. Characteristic structures of the Zanskar shear zone footwall in domain 1. (A) Mafic orthogneiss lithon inside porphyritic orthogneiss shows normal top-to-the-NE shearing (white arrows; locality ZNK134). Rectangles mark position of photographs in B, C, and D. (B) Detail of mafic lithon
Image
Cross section through the Gumburanjon leucogranite and Zanskar Shear Zone showing the location of samples collected for thermobarometric and geochronological analysis. Note the cross-cutting relationships between the leucogranite dikes and the mylonitized pegmatite veins. Also note the absence of any leucogranite in the uppermost part of the shear zone. For simplicity, brittle normal faults are shown schematically with no throw across them.

Cross section through the Gumburanjon leucogranite and Zanskar Shear Zone s...

Published: 01 July 1999
Figure 3. Cross section through the Gumburanjon leucogranite and Zanskar Shear Zone showing the location of samples collected for thermobarometric and geochronological analysis. Note the cross-cutting relationships between the leucogranite dikes and the mylonitized pegmatite veins. Also note
Journal Article

Structural and metamorphic architecture of the Zanskar Himalaya, Suru Valley region, NW India: Implications for the evolution of the Himalayan metamorphic core

I.P. Cawood, M.R. St-Onge, O.M. Weller, M.P. Searle, D.J. Waters, T. Ahmad
Journal: GSA Bulletin
Published: 14 June 2024
GSA Bulletin (2025) 137 (1-2): 1–28.
DOI: https://doi.org/10.1130/B37241.1
... regional penetrative fabric through crenulation and transposition of D 1 fabrics. Thrust-sense D 2 fabrics were reactivated during D 3 as the Greater Himalayan Sequence was exhumed along the normal-sense Zanskar Shear Zone, which is part of the South Tibetan Detachment System. D 3 fabrics, associated...
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View PDF for article title, Structural and metamorphic architecture of the <span class="search-highlight">Zanskar</span> Himalaya, Suru Valley region, NW India: Implications for the evolution of the Himalayan metamorphic core
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Journal Article

Himalayan gneiss dome formation in the middle crust and exhumation by normal faulting: New geochronology of Gianbul dome, northwestern India

Forrest Horton, Jeffrey Lee, Bradley Hacker, Meilani Bowman-Kamaha’o, Michael Cosca
Journal: GSA Bulletin
Published: 01 January 2015
GSA Bulletin (2015) 127 (1-2): 162–180.
DOI: https://doi.org/10.1130/B31005.1
... shear zone and the top-down-to-the-NE (normal sense) Zanskar shear zone (the western equivalent of the South Tibetan detachment system). Monazite U/Th-Pb geochronology records (1) Paleozoic emplacement of the Kade orthogneiss and associated granite dikes; (2) prograde Barrovian metamorphism from 37...
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View PDF for article title, Himalayan gneiss dome formation in the middle crust and exhumation by normal faulting: New geochronology of Gianbul dome, northwestern India
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Journal Article

Metamorphism, Melting, and Extension: Age Constraints from the High Himalayan Slab of Southeast Zanskar and Northwest Lahaul

J. D. Walker, M. W. Martin, S. A. Bowring, M. P. Searle, D. J. Waters, K. V. Hodges
Published: 01 July 1999
The Journal of Geology (1999) 107 (4): 473–495.
DOI: https://doi.org/10.1086/314360
...Figure 3. Cross section through the Gumburanjon leucogranite and Zanskar Shear Zone showing the location of samples collected for thermobarometric and geochronological analysis. Note the cross-cutting relationships between the leucogranite dikes and the mylonitized pegmatite veins. Also note...
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View PDF for article title, Metamorphism, Melting, and Extension: Age Constraints from the High Himalayan Slab of Southeast <span class="search-highlight">Zanskar</span> and Northwest Lahaul
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Journal Article

Age and origin of granites in the Karakoram shear zone and Greater Himalaya Sequence, NW India

Forrest Horton, Mary L. Leech
Journal: Lithosphere
Publisher: GSW
Published: 01 June 2013
Lithosphere (2013) 5 (3): 300–320.
DOI: https://doi.org/10.1130/L213.1
... presents granite U/Th-Pb ages and zircon Hf isotopic signatures along the two major structures in northern India: the Karakoram shear zone and the Zanskar shear zone, the westernmost limb of the South Tibetan detachment system. Leucogranites in Zanskar crystallized 27–20 Ma and exhibit Precambrian...
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View PDF for article title, Age and origin of granites in the Karakoram <span class="search-highlight">shear</span> <span class="search-highlight">zone</span> and Greater Himalaya Sequence, NW India
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Journal Article

Late Cenozoic - Quaternary Thermo-Tectonic History of Wigher Himalayan Crystalline (HHC) in Kishtwar- Padar-Zanskar region, NW Himalaya: Evidence from Fission Track Ages

Ashok Kumar, Nand Lal, A. K. Jain, R. B. Sorkhabi
Published: 01 April 1995
Jour. Geol. Soc. India (1995) 45 (4): 375–391.
DOI: https://doi.org/10.17491/jgsi/1995/450402
.... However, regional exhumation rate near the base along the Main Central Thrust and in central parts of the HHC from FT apatite ages is faster upto 0.35 mm/a since Late Miocene. Exhumation has considerably slowed down to 0.11 mm/a along its northern boundary and 0.02 mm/a along the Zanskar Shear Zone...
View PDF for article title, Late Cenozoic - Quaternary Thermo-Tectonic History of Wigher Himalayan Crystalline (HHC) in Kishtwar- Padar-<span class="search-highlight">Zanskar</span> region, NW Himalaya: Evidence from Fission Track Ages
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Add to Citation Manager for Late Cenozoic - Quaternary Thermo-Tectonic History of Wigher Himalayan Crystalline (HHC) in Kishtwar- Padar-<span class="search-highlight">Zanskar</span> region, NW Himalaya: Evidence from Fission Track Ages
Journal Article

The structure and stratigraphy of SE Zanskar, Ladakh Himalaya

R. McELROY, J. CATER, I. ROBERTS, A. PECKHAM, M. BOND
Published: 01 December 1990
Journal of the Geological Society (1990) 147 (6): 989–997.
DOI: https://doi.org/10.1144/gsjgs.147.6.0989
... deformed by NE-directed structures probably produced during gravitational collapse of the thrust stack. Collapse occurred along the previously documented Zanskar shear zone, and also by reactivation of the basal detachment of the Zangla nappe. This dorsal collapse of the orogen was probably related...
View PDF for article title, The structure and stratigraphy of SE <span class="search-highlight">Zanskar</span>, Ladakh Himalaya
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Journal Article

Structure of the Main Central Thrust zone and extrusion of the High Himalayan deep crustal wedge, Kishtwar–Zanskar Himalaya

B. J. STEPHENSON, M. P. SEARLE, D. J. WATERS, D. C. REX
Published: 01 July 2001
Journal of the Geological Society (2001) 158 (4): 637–652.
DOI: https://doi.org/10.1144/jgs.158.4.637
...-grade gneisses, migmatites and 19.5–21.5 Ma old leucogranites formed at pressures between 4.5 and 7 kbar and depths of 16–25 km. A NE-dipping normal fault ductile shear zone at the top of the slab (Zanskar Shear Zone) shows condensed but right way-up isograds from sillimanite to chlorite grade over 2...
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View PDF for article title, Structure of the Main Central Thrust <span class="search-highlight">zone</span> and extrusion of the High Himalayan deep crustal wedge, Kishtwar–<span class="search-highlight">Zanskar</span> Himalaya
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Image
(A) Conceptual diagram (modified from Beaumont et al., 2004) showing the location of Gianbul dome formation in the middle crust. (B–E) Conceptual diagrams of Gianbul dome (see inset location in A) modified from Rey et al. (2011). Initial doming is driven by vertical pressure gradients below a thinning upper crust (B), after which decompression melting causes buoyancy-driven ascent of the dome (C). Melt emplacement marks the end of doming at ca. 22 Ma as normal-sense displacement in the Zanskar shear zone was transferred to the brittle Zanskar normal fault (D). Subsequent surface erosion has exposed the core of Gianbul dome at the surface (E). GHS—Greater Himalaya sequence; KSZ—Khanjar shear zone; MCT—Main Central thrust; STDS—South Tibetan detachment system; THS—Tethyan Himalaya sequence; ZSZ—Zanskar shear zone.

(A) Conceptual diagram (modified from Beaumont et al., 2004 ) showing the ...

Published: 01 January 2015
gradients below a thinning upper crust (B), after which decompression melting causes buoyancy-driven ascent of the dome (C). Melt emplacement marks the end of doming at ca. 22 Ma as normal-sense displacement in the Zanskar shear zone was transferred to the brittle Zanskar normal fault (D). Subsequent
Image
Regional geology map the northwestern Himalaya, modified from Thakur (1998) and Yin (2006). Gianbul dome is exposed in the footwall of Zanskar normal fault, which separates low-grade Tethyan sediments from underlying Greater Himalayan metamorphic rocks. MCT—Main Central thrust; ZSZ—Zanskar shear zone; KSZ—Khanjar shear zone; STDS—South Tibetan detachment system.

Regional geology map the northwestern Himalaya, modified from Thakur (1998...

Published: 01 January 2015
—Zanskar shear zone; KSZ—Khanjar shear zone; STDS—South Tibetan detachment system.
Image
Simplified geologic map of the Zanskar River basin after Fuchs (1987) with additions for Zanskar Shear Zone from Dèzes et al. (1999), southern Zanskar (Lahul) from Steck et al. (1993), and Tso Kar area from Epard and Steck (2008). Sample locations are noted with white dots. N-T—Nyimaling–Tso Morari gneiss dome.

Simplified geologic map of the Zanskar River basin after Fuchs (1987) wit...

Published: 01 July 2017
Figure 3. Simplified geologic map of the Zanskar River basin after Fuchs (1987) with additions for Zanskar Shear Zone from Dèzes et al. (1999) , southern Zanskar (Lahul) from Steck et al. (1993) , and Tso Kar area from Epard and Steck (2008) . Sample locations are noted with white dots. N-T
Image
(a) Geological map and (b) Isograd map of the Kishtwar–Zanskar High Himalaya incorporating field mapping data from Searle et al. (1988, 1992, 1999), Stäubli (1989), Kündig (1989), Pognante et al. (1990), Guntli (1993), Dransfield (1994), Stephenson (1997), J. D. Walker (1998) and C. B. Walker (1999). WB, Warwan Backthrust; ZSZ, Zanskar Shear Zone; MCT, Main Central Thrust; KSZ, Kilar Shear Zone.

( a ) Geological map and ( b ) Isograd map of the Kishtwar–Zanskar High Him...

Published: 01 July 2001
(1998) and C. B. Walker (1999). WB, Warwan Backthrust; ZSZ, Zanskar Shear Zone; MCT, Main Central Thrust; KSZ, Kilar Shear Zone.
Image
Simplified geological map of NW India modified from Steck (2003), with adjustments to Suru Valley region (rectangular box) based on Figure 3. Completed transect through the Lalung Valley is shown by the small rhomboid box. MBT—Main Boundary Thrust; MCT—Main Central Thrust; MZB—Main Zanskar Backthrust; SD—Sangla Detachment; WF—Warwan fault; ZSZ—Zanskar Shear Zone.

Simplified geological map of NW India modified from Steck (2003) , with ad...

Published: 14 June 2024
Zanskar Backthrust; SD—Sangla Detachment; WF—Warwan fault; ZSZ—Zanskar Shear Zone.