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迁安断块隆起或称迁安花岗岩片麻岩穹隆是冀东高级变质地体的一个重要组成部分,它的四周为大型古断裂所切割,仅在西侧保留了边缘褶皱束,在褶皱束内有同构造的或构造后的纵向断裂(钱祥麟,1981)。本文讨论的紫苏花岗岩,大致沿西部边缘褶皱束的纵向断裂分布。从南部的松汀一带到北部的水厂断续出露。白益良等(1980)在本区经过详细的地质填图后,将该区地层从老至新划为曹庄群—松汀群—卢龙群。新近得到的曹庄群变基性岩的Sm-Nd同位素年龄是35.15±1.15(2σ)亿年。紫苏花岗岩主要发育在曹庄
The Qian’an uplift or Qiang’an granitic gneiss dome is an important part of the high-quality metamorphic terrane in eastern Hebei. It is surrounded by large ancient faults and has marginal fold bundles only on the western side. There is a syn-tectonic or post-structural longitudinal fault (Qian, 2000). Perillae granites discussed in this paper are generally distributed along the longitudinal rupture of folded bundles along the western margin. From the Songting area in the south to the waterworks in the north intermittently exposed. After Bai Yiliang et al. (1980) detailed geological mapping in this area, the strata in this area were divided into Caozhuang group - Songting group - Lulong group from old to new. The Sm-Nd isotopic ages of the recently acquired Caozhuang group metamorphic rocks are 35.15 ± 1.15 (2σ) billion years. Perillae granite is mainly developed in Caozhuang