Open AccessEVOLUTION OF KARAKORAM SEQUENCE, HUNZA VALLEY NE PAKISTAN: EVIDENCES FROM FIELD MAPPING AND MICRO-ANALYTICAL WORK
Author(s) -
Sher Sultan Baig,
Chuandong Xue,
Masroor Alam,
Naeem Ullah,
Masroor Alam,
Syed Asim Hussain
Publication year - 2020
Publication title -
journal of mountain area research
Language(s) - English
Resource type - Journals
eISSN - 2518-850X
pISSN - 2518-8496
DOI - 10.53874/jmar.v5i0.66
Subject(s) - metamorphism , geology , metamorphic rock , geochemistry , orogeny , batholith , gneiss , sillimanite , anatexis , petrography , schist , igneous rock , sequence (biology) , petrology , paleontology , partial melting , tectonics , crust , biotite , quartz , genetics , biology
The Karakoram metamorphic Complex (KMC) in the southern Karakoram block is one of the best examples of Barrovian type metamorphism that comprises numerous exhumed metapelite units where a series of low to high grade (green schist to sillimanite facie) rocks are exposed. This sequence shows a complex polyphase history of metamorphism and deformation which offer deeper understanding of collision orogeny. Karakoram metamorphic Complex contains metapelites, meta-carbonates, meta-igneous and amphibolite layers, cross-cut by granite sheets in the northern part. This complex is bounded to the north by the Hunza plutonic unit which is the central portion of the massive east-west trending Karakoram axial batholith and to the southwest by the Main Karakoram thrust (MKT). In this contribution, we provide detail geological mapping, petrography, geochemistry and micro-analytical work using Electron Prob-micro analysis in the central Hunza Valley.