福清沙浦—平潭马腿推覆型韧性剪切带基本特征

Basic Characteristics of Nappe-type Ductile Shear Zone in Shapu,Fuqing and Matui, Pingtang

福清沙浦—平潭马腿推覆型韧性剪切带位于福建东南沿海褶皱变质带的北段，在“三山、平潭、高山、观音澳”幅ｌ：５万区调工作中，我们首次发现并肯定了该推覆型韧性剪切带的存在，并作了详细的工作。本文较全面论述了该剪切带的基本结构、小型变形构造、糜棱岩等特征及其形成时代，并指出其可能为印支期造山带的残留体，这对重新认识中国东南沿海大陆边缘地质构造的演化具有一定的意义。

n the regional geological surveying,the authors found and ascentained a nappe-type ductile shear zone in Shapu, Fuqing and Matui,Pingtang, which is situated in the northern part of the coastal fold and metamorphic belt of Southeastern Fujian. The paper focuses on the discussion of the characteristics of the basic structures, small deformational structures and mylonite and the formation time of the ductile shear zone. It is inferred that the ductile shear zone is the relict of the Indosinian orogeny belt, which has a certain signification for reunderstanding the geological and tectonic evolution of South China coastal continental margin.