The supervisor’s review on Eugenia Semikhina’s master thesis “Petrology of plagiogranites from Rypdalen zone within the Lyngen ophiolite complex, Northern Norway” 
A fragment of ophiolite complex situated on Lyngen Peninsula in Northern Norway provides a unique possibility to trace crust-forming processes from incipient arc stage till continental collision. The complex comprises oceanic gabbro and pillow lavas and a lower part of island arc crust. The thesis of Eugenia Semikhina is devoted to plagiogranites emplaced within the Rypdalen shear zone at the boundary between oceanic and arc parts of the complex. The initial information about the plagiogranites was obtained from the literature. But the first field observations have shown that we are dealing with metamorphic rocks; and it is necessary to define the place of metamorphism in the geological history of Lyngen complex. However, there is no specific research dedicated to metamorphism of the Lyngen complex. Eugenia Semihina first took up the solution to this problem and, in general, successfully coped with the task. Eugenia actively participated in field work and had established herself as a good friend and a researcher who is not afraid of difficulties. Eugenia alone spent collecting materials and sample preparation. While working on his thesis she has gained the skills of mineral study using microprobe, application of thermobarometric methods to assess PT-mineral equilibrium conditions and has gained a knowledge in the field of geochemistry of granitoids of various origin. The undoubted advantage of the work is the identification of two metamorphic parageneses based on petrographic and mineralogical data, evaluation of the conditions of their equilibrium and the conclusion about the geodynamic setting of metamorphism of Rypdalen plagiogranites.
Although Eugenia Semikhina has sufficiently substantiated her conclusions, in my opinion, the existing geological, petrographic and mineralogical data could be presented more fully.