Abstract:

There are a whole series of recent achievements about oregenic belts and ophiolites in the 32nd International Geological Congress. A comparative study of Archean and younger orogens lead to a conclusion that the key factor in determining these orogens’ overall geometries of Rodinia supra-continent about Mesoproterozoic assembly and Neoproterozoic breakup is further discussed. Oregenic process and possible model during late pre-Cambrian period and Paleozoic were ananlyzed. Deep exhumation, uplift and denudation of oregens are closely related to changes of weather and environment evolution, which is an important geological field. Igneous petrogenesis of ophiolites can not be explained by a simple model. It is studied that igneous petrogenesis of ophiolites are multi-genesis. Recent studies also set up several ophiolite emplacement models, such as bidivergent emplacement, domino-like rotation emplacement and subduction and rapid exhumation emplacement. Ophiolites occurred in Tethys and circum Pacific Ocean display obvious variety.

Key words: the 32nd International Geological Congress, oregenic belt, ophiolite, advance