Nirmalya Chatterjee

6 Questions 21 Answers 0 Followers

Questions related from Nirmalya Chatterjee

Is it the deformation age or the cooling age of metamorphic rock?

The O18 isotopic equilibrium temperature (between biotite-muscovite) in a metapelitic mylonite is 300 deg C. However, the stable paragenesis of these metapelites includes garnet, staurolite. The...

24 December 2015 8,733 12 View

Can Ar-Ar closure temperature of muscovite be as low as 300 C?

The measured stable O18 isotopic equilibrium temperature of muscovite and biotite is 300 deg C in a metapelitic mylonite. The Ar-Ar age of dynamically recrystallized muscovite is c.11-12 Ma. Can...

08 December 2015 9,854 6 View

Can the stretching lineation be parallel to the strike of c-planes produced in the same deformation phase?

In most of my samples stretching lineations are subparallel to the dip of c-planes. However,I have some samples where pucker axis lineations within mylonitic metapelites are stretched in a...

24 April 2015 5,653 8 View

How to prove strain hardening in micaceous mylonite?

I have some samples of micaceous metapelites which were mylonitized in during normal sense motion. The strand of mylonitic rocks covers a transport parallel thickness of around 5-6 km. Quartz...

19 April 2015 9,550 5 View

Can anybody suggest extremely high quality separation of muscovite, biotite and quartz from a fine grained mica schist?

I want 1) to remove quartz within biotite, 2) quartz entrapped within muscovite book 3) smaller flakes biotite from a small book of muscovite. All these are from a mylonitic metapelites.

17 March 2015 1,465 9 View

Can it be done for the STDS in the Himalaya?

The paleoelevation estimation during the extensional activity of the STDS across the Himalaya is rare (Gébelin et al., 2013 for Everest Himalaya). I am curious to know the paleoelevation during...

01 January 1970 1,546 1 View