Source provenance
Ogasawara, M., Fukuyama, M., Siddiqui, R.H. & Zhao, Y. (2018). Origin of the Ordovician Mansehra granite in the NW Himalaya, Pakistan: constraints from Sr–Nd isotopic data, zircon U–Pb age and Hf isotopes. In: Treloar, P.J. & Searle, M.P. (eds) Himalayan Tectonics: A Modern Synthesis. Geological Society, London, Special Publications, 481.
Cited by 1 unit (1 published) · 0 field-level citations · 1 revision note.
Zircon U-Pb dating of the Mansehra granite yields 206Pb/238U crystallization ages of 483-476 Ma (Early Ordovician). Typical S-type granite; inherited zircon cores cluster at 889-664, 1862-1595 and 2029 Ma, with a Late Neoproterozoic-Cambrian sedimentary protolith (max age ~664 Ma). High initial Sr (0.7324-0.7444) and low eNd(t) (-9.2 to -8.6) with Paleoproterozoic Nd/Hf model ages indicate a large old-crustal contribution. A typical Lesser Himalayan Cambro-Ordovician granite.
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Units citing this source
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- Age: Ogasawara et al. (2018): zircon U-Pb dating gives 206Pb/238U crystallisation ages of 483–476 Ma (Early Ordovician), confirming and refining the curated Ordovician age (and definitively superseding the Late-Cretaceous ~80 Ma K-Ar age of Calkins et al. 1975). The Mansehra granite is a typical S-type Lesser Himalayan granite; inherited zircon cores at 889–664, 1862–1595 and 2029 Ma indicate a Late Neoproterozoic–Cambrian sedimentary protolith (max age ~664 Ma) derived from Paleoproterozoic crust (high initial 87Sr/86Sr 0.7324–0.7444; eNd(t) −9.2 to −8.6).