CONCEPTS OF STRUCTURAL TRANSPOSITION AND SCHIBEDDING OF METAMORPHIC ROCK. BISCUSSION
Zhang Hu(Instutite of Geochemistry, Academi a Silica)
The author suggests that the structural transposition should be divided into form transposition and orientation transposition.The form transposition is a type of trans- position which in a certain scale, makes old penetrative structural elements replaced by new ones and, therefore, hardly or impossibly recognized. The orientation transposition refers to that the old penetrative structural elements are still discernible in a given scale, but their orientation has been changed in parallel to that of new penetrative structural elements.Schibedding (or schistose bedding) is a type of bedding which ever experienced intensive orientation. It bears both the orientation of schistosity and form of bedding, and as a part of beddings,it runs parallel to schistosity. Schibedding can either be bealt with as bedding, or be treated ?.s schistosity in structural analysis.