Abstract:
The sequence of Indian plate rocks subjacent to the Main Mantle Thrust (MMT) described herein is exposed in Domel, Sohch and Lidi village areas of the upper Kaghan Valley. In this part of the “High Himalayan Crystallines”, ultramafic cumulate rocks occur (i) as dunite and pyroxenites near Lidi village; and (ii) as clinopyroxenites at Domel, lying to the immediate southeast of MMT. These are succeeded down-section by the medium to high grade Barrovian type para-metamorphites. The kyanite-grade para-gneisses at Domel give way towards SE to the garnet-biotite gneisses, with interbeds of marble and amphibolites. This NW direction of progressive increase in grade of Barrovian type metamorphism adds up another linear direction of grade increase to the previously described general NE increase of metamorphic grade in the Kaghan Valley transect by Rehman et al. (2007). Felsic orthogneisses occur at Sohch and at places bear more mafic enclaves and very coarse porphyroblasts of feldspar. They carry higher SiO2, Na2O and K2O than the less felsic paragneisses including the “Naran Gneisses” that occur along the main valley of Kunhar river. In this part of Kaghan Valley, the NE-SW road-side section exposes amphibolite facies paragneisses with gross-banded amphibolites, pure to impure marble interbeds and calc-silicate gneisses.
Page(s):
77-91
DOI:
DOI not available
Published:
Journal: Geological Bulletin of the Punjab University, Volume: 42, Issue: 0, Year: 2007