Source provenance

DiPietro, J.A. & Isachsen, C.E. (2001). U-Pb zircon ages from the Indian plate in northwest Pakistan and their significance to Himalayan and pre-Himalayan geologic history. Tectonics, 20(4), 510-525.

Cited by 2 units (1 published) · 4 field-level citations · 2 revision notes.

Full text reviewed (reviewer-supplied PDF). U-Pb zircon geochronology of the Indian-plate basement, NW Pakistan. Defines the Kishar formation as a pre-2173 Ma metasedimentary basement unit unconformably below the Karora formation (the basal-Karora conglomerate carries clasts of the older Kishar basement - the likely source of the 'conglomerate' mis-description). The Mekhband formation (Malakand slice) unconformably overlies the Pinjkora complex and is intruded by the ~278 Ma Chakdarra orthogneiss, so it PREDATES the early Permian and resembles the Marghazar/Kashala (Alpurai Group) rocks. Does NOT mention 'Landai' (0 occurrences) - that unit remains unsourced beyond Malkani 2017.

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Units citing this source

• Precambrian Kishar Formation Paleoproterozoic
  LithologyAgeEraPeriod
  • Lithology: RESOLVED (DiPietro & Isachsen 2001 + DiPietro & Pogue 2004, both full text): the Kishar formation is a pre-2173 Ma METASEDIMENTARY BASEMENT unit of the Indian plate (Indus syntaxis / Besham), unconformably below the Karora formation. The earlier "mainly conglomerate" description (Malkani 2017) was a mis-attribution of the conglomerate at the BASE OF THE KARORA (which carries Kishar-derived clasts) - not the Kishar itself. Lithology and age corrected; homonym flag resolved (same unit, mis-described).
• Paleozoic Mekhband Formation Permian under review
  • Age: Corroborated by DiPietro & Isachsen (2001, full text): the Mekhband formation (Malakand slice) unconformably overlies the Pinjkora complex and is INTRUDED by the ~278 Ma Chakdarra orthogneiss - so it predates the early Permian and lithologically resembles the Marghazar/Kashala (Alpurai Group) rocks. This implies the dataset s "Permian" age is TOO YOUNG; recommend reviewing toward pre-Late-Palaeozoic (author to confirm).