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本文调查的Mustio片麻岩穹窿位于芬兰西南部的1.92-1.7Ga瑞芬构造中。该穹窿在多次变形的片岩和片麻岩区的构造-变质史中形成相对晚些。所叙述的显微构造、中型构造和大型构造均与变质发展有关。见到一个产生大规模逆掩褶皱的早期F_1构造幕证据以及以平行岩层贯穿片理为特征的变厚构造地层。然而,最引人注目的是以紧闭直立的具东西向轴面的等斜F_2褶皱。F_2被F_3所交错褶皱,而F_3
The Mustio gneiss dome surveyed in this paper is located in the 1.92-1.7Ga REFEN structure in southwestern Finland. The dome is relatively late in the tectono-metamorphic history of multiple deformed schist and gneiss regions. The described microstructures, medium structures and large structures are all related to metamorphism. An early evidence of F 1 tectonics that produced large-scale reverse folds and thickening formations characterized by paralleling of strata are seen. However, the most striking feature is the isofacial F_2 folds with upright and erect axial surfaces. F_2 is interlaced by F_3, while F_3