北京地区太古宙变质地层研究新进展

The new progress in the study of Archean metamorphic strata in Beijing area

摘要: 北京北部山区密云—怀柔地区广泛分布太古宙变质岩。该区经历多期地质构造作用,矿产丰富,一直以来受到国内外地质学者的广泛关注。通过对北京密云—怀柔地区太古宙变质岩石和年代学深入系统的研究,变质建造、变质作用条件、变形变质和同位素年代学等方面研究,提出本区变质表壳岩新的划分方案,在区内变质地层研究方面取得了新的进展。

Abstract: Archean metamorphic strata are widely distributed in Miyun and Huairou District in the northern mountainous area of Beijing. This area has experienced multi-stage geological tectonism and produced abundant mineral resources, and thus aroused much interest among geological experts both in China and abroad. This paper puts forward a new classification scheme of the metamorphic strata and the supracrustal rock on the basis of deeply and systematically studying Archean metamorphic formation, metamorphic conditions, deformation and metamorphism, isotope chronology and some other aspects, thus raising the research level of metamorphic rocks to a new height.