Question

4. Examine the photomicrograph in Fig. G-53. Describe the principal microstructures in the quartz and the feldspar, and interpret the deformation mechanism that led to these microstructures. What is approximate range of temperatures experienced by this rock? How do you know? On the photomicrograph, label all of the kinematic indicators you can find. What is the sense of shear recorded by these kinematic indicators? Description of principal microstructures in quartz and feldspar and interpretation of mechanisms: Approximate range of temperatures and evidence: Sense of shear: ig. G-53 Photomicrograph for use in Problem 1 F, feldspar; Q, quartz. Plane polarized light. Scale bar is 0.5 mm.

Answer 1

Answer: By ob servingthe given diagram and data Wle have to Answet tho gruen quer tions:- D Describe the. tho prinopal microStructures in and tho feld Spor Quarts Quarts and fecd Spar, In tha By the influence e caloclastc deformation the prinupal micostructure is mylonitic microshucture. Noco e hQve to describe tha deforma bon mechanism Scale faulltting Slip alonq Cataclasis, gran aTe maintj Clevevage Controlled fractures. the defoma bion mechanism Mostly Contolled we have to And an approximoate Alow eperienaed by tha rock1 range e tempera ture below 258c , the approxi'mate. Temperature is S shaltpu olon 1s less than Yange e pressuve to bm cepth. the data gatherd from the both Cata ciastic and feldspar

and Also quatt2 has not been gon for metting. O hlhat is the Sengeshaar reoded bythase bihematic nditator The Serce e kinemadic hdgatoi. ts anticlockwise Snistrial feld spar faulted. oh the. and al e to h'ne ma tir label Photomicrograph indica tors Hlence the given questions are Answered