Source provenance

Yamamoto, H., Rehman, H.U., Kaneko, Y. & Kausar, A.B. (2011). Tectonic stacking of back-arc formations in the Thelichi section (Indus valley) of the Kohistan arc, northern Pakistan. Journal of Asian Earth Sciences, 40, 417-426.

Cited by 4 units (4 published) · 1 field-level citation · 3 revision notes.

Reviewer-supplied. Structural re-analysis of the Jaglot Group in the Thelichi section (Indus valley), Kohistan arc. Argues the three units (structural bottom Thelichi Formation -> Gashu-Confluence Volcanics -> top Gilgit Formation) form a north-dipping tectonic stack with consistent northward younging, rather than a fold-repeated 'Jaglot syncline'; the stack records northward subduction and closure of the Kohistan back-arc basin against the Asian margin (~100 Ma). Confirms the Jaglot Group as a Cretaceous back-arc succession conformably overlain by the Chalt Volcanic Group.

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Units citing this source

• Mesozoic Gashu-Confluence Volcanics Cretaceous
  Lithology
• Mesozoic Gilgit Formation Cretaceous
  • Age: Yamamoto et al. (2011): in the Thelichi section the Jaglot Group forms a north-dipping tectonic stack with consistent northward younging (no fold-repeated 'Jaglot syncline'), the Gilgit Formation being the structurally highest of the three units (Thelichi Formation → Gashu-Confluence Volcanics → Gilgit Formation); graded bedding, cross-bedding and pillow structures confirm clastic-and-volcanic origins in a Cretaceous back-arc basin.
• Mesozoic Jaglot Group Jurassic–Cretaceous
  • Geological significance: Yamamoto et al. (2011): the Jaglot Group in the Thelichi section (Indus valley) is a north-dipping tectonic stack — structural bottom Thelichi Formation, middle Gashu-Confluence Volcanics, top Gilgit Formation — with consistent northward younging rather than the previously inferred 'Jaglot syncline'. The stack records northward subduction and closure of the Kohistan back-arc basin against the Asian margin (~100 Ma); the Chalt Volcanic Group conformably overlies the group.
• Mesozoic Thelichi Formation Cretaceous
  • Lithology: Khan T. et al. (1997) / Yamamoto et al. (2011): the Thelichi Formation is the uppermost (Khan) — but structurally lowest (Yamamoto) — unit of the Jaglot Group, composed of metavolcaniclastic, metavolcanic, metapelitic and metacalcareous rocks; together with the Gashu-Confluence Volcanics it is correlated with the Chalt Volcanics and the Albian–Aptian Yasin Group.