【摘要】 在建瓯地区进行地质调查过程中,对马面山俯冲增生杂岩进一步解体,划分出不同类型的岩块,将其中石英岩类厘定为硅质岩岩块,该岩性前人一直将其作为龙北溪(岩)组划分标志层。通过对石英岩岩石化学、地球化学进行分析,结合锆石特征及年龄测试数据,判定该区域内石英岩原岩为一套硅质岩,为热水沉积类型,形成于不同类型的沉积环境。该论证是对马面山俯冲增生杂岩认定的有力支持。更多还原

【Abstract】 In the course of the geological investigation, the Mamianshan subduction accretive complex of the is further disintegrated, and different types of rock mass are divided, and the quartzite is determined as the siliceous rock mass, which has been used as the mark layer of the Longbeixi(rock) group. Based on the analysis of the rock chemistry and geochemistry of quartzite, combined with the characteristics of the rock and the age data, it is determined that the quartzite in the region is a set of silicalite, which is the type of hot water deposition and is formed in different types of sedimentary environment. This argument is a strong support for the identification of Mamianshan subduction accretive complex.更多还原