The paper discusses the results of U-Pb isotope dating monazites and zircons from granitoids formed under PT conditions granulite amphibolite facies gneisses, crystalline shales that are like xenoliths in these Ukrainian Shield. In some cases, such as Berdychiv-type Zhezhelivsky quarry, age values outer edges coincide well; others, granites Ivanivsky they differ by more than error. Odessa even ...

In Cameroon, most of the iron formation occurrences reported are found within Nyong and Ntem Complexes. The Anyouzok deposit is located in Complex greenstone belts, which represent NW margin this Congo craton. main lithological units comprise formations (IFs) unit, consisting banded IFs (BIFs) sheared BIFs (SBIFs), associated metavolcanic rocks unit mafic granulite, garnet amphibolite, biotite ...

For the first time in sixty years since synthesis of stishovite, we report unambiguous evidence stishovite formed deep Earth. A minimum pressure about 7.5 GPa at 1000 °C is necessary for formation corresponding to a depth 230 km. In this manuscript identification along with coesite as inclusions mineral grains from Waldheim granulite. This implies that was transported upwards, probably very rap...

The ca. 2 Ga retrogressed eclogites in the Usagaran Belt central Tanzania are among oldest documented world. As such, they have been used to pinpoint thermal conditions of onset modern style subduction on Earth. Two samples mafic eclogite interrogated reconstruct metamorphic history subducted crust. several kilometres apart, separated by a mylonitic upper amphibolite-transitional granulite foli...