Apr 3, 2012 - volatiles (McCaig, 1988). This leads to a broad range of ...... spot fusion of phengites from the Dora Maira nappe of the western Alps: Geology, v.
Lithosphere, published online on 3 April 2012 as doi:10.1130/L163.1
Lithosphere Exhumation history of the Karakoram fault zone mylonites: New constraints from microstructures, fluid inclusions, and 40Ar-39Ar analyses Barun K. Mukherjee, Koushik Sen, Himanshu K. Sachan and Sudip K. Paul Lithosphere published online 3 April 2012; doi: 10.1130/L163.1
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Lithosphere, published online on 3 April 2012 as doi:10.1130/L163.1
RESEARCH
Exhumation history of the Karakoram fault zone mylonites: New constraints from microstructures, fluid inclusions, and 40Ar - 39Ar analyses Barun K. Mukherjee*, Koushik Sen, Himanshu K. Sachan, and Sudip K. Paul WADIA INSTITUTE OF HIMALAYAN GEOLOGY, 33, GMS ROAD, DEHRA DUN-248 001, INDIA
ABSTRACT The Karakoram fault zone is a dextral strike-slip fault bounded by the Pangong and Tangtse strands on its NE and SW flanks, respectively. In the Tangtse shear zone, the microstructures of mylonitic leucogranite exhibit superposition of high-temperature deformation followed by low-temperature deformation. The mylonites show fluid immiscibility, containing brine and carbonic inclusions. The occurrence of carbonicand brine-rich inclusions in the oscillatory-zoned plagioclase indicates that they were trapped during the formation of the leucogranite. Eventually, these fluids recorded a near-isobaric drop in temperature down to
