Source provenance

Khan, T., Jan, M.Q., Khan, M.A. & Kausar, A.B. (1997). High-grade metasedimentary rocks (Gilgit Formation) in the vicinity of Gilgit, Kohistan, northern Pakistan. Journal of Mineralogy, Petrology and Economic Geology, 92, 465-479.

Cited by 4 units (4 published) · 10 field-level citations · 3 revision notes.

Reviewer-supplied. Definitional description of the Gilgit Formation as the basal formation of the Jaglot Group (Gilgit Formation -> Gashu-Confluence Volcanics -> Thelichi Formation) near Gilgit, Kohistan. Thick turbiditic metasediments (>80% paragneisses/schists, metapelite-semipsammite protoliths) with amphibolite and calc-silicate interbeds, metamorphosed to sillimanite grade (peak ~640 C, 6.7 kbar); type locality Sai Nala. Lower contact underplated by the Chilas Complex; upper contact conformable with the Gashu-Confluence Volcanics; correlated with the Katzarah Formation (Baltistan).

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Units citing this source

• Mesozoic Gashu-Confluence Volcanics Cretaceous
  AgeType localityIntroduced byDepositional environmentGeological significance
• Mesozoic Gilgit Formation Cretaceous
  EraPeriodEpochAgeType locality
  • Age: Khan T. et al. (1997) define the Gilgit Formation as a constituent of the Cretaceous Jaglot Group of the Kohistan island arc (arc active in Late Jurassic–Cretaceous times); its overlying Gashu-Confluence Volcanics and Thelichi Formation are the equivalents of the Chalt Volcanics and the Albian–Aptian Yasin Group, placing the Gilgit Formation in the Cretaceous. The prior uncited 'Jurassic' age is superseded (era/period/epoch reset accordingly).
  • Lithology: Khan T. et al. (1997): the Gilgit Formation is a thick turbiditic metasedimentary succession (>80% paragneisses and schists — metapelite, semi-metapelite and semi-metapsammite protoliths) interstratified with amphibolites and calc-silicates, regionally metamorphosed up to sillimanite grade and locally migmatitic (peak ~640 °C, 6.7 kbar). Type locality Sai Nala; lower contact not exposed (presumed underplated by the Chilas Complex), upper contact conformable with the Gashu-Confluence Volcanics. Lithologically resembles the Katzarah Formation of Baltistan.
• Mesozoic Jaglot Group Jurassic–Cretaceous
  • Geological significance: Khan T. et al. (1997) subdivide the Jaglot Group near Gilgit, from bottom to top, into the Gilgit Formation, the Gashu-Confluence Volcanics and the Thelichi Formation — reported there for the first time as a thick metasedimentary–metavolcanic arc succession.
• Mesozoic Thelichi Formation Cretaceous

  Listed as a corroborating source for this unit.