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本文研究了产于广西贺县大宁花岗闪长岩体中的脆—塑性过渡型断层岩带的变形显微构造及其发展演化、变形机制和岩组特征。随变形作用的发展,其变形性质逐渐从以脆性变形占优势过渡为以塑性变形占优势,并形成水平分带。作者将这种与碎裂岩系列和糜棱岩系列不同的过渡型断层岩称为“碎糜岩系列”。对前人的断层双层模式提出了修改和补充意见,并提出了新的断层岩分类方案。
In this paper, the deformation microstructure, evolution and deformation mechanism, and the characteristics of the lithofacies of the brittle-plastic transitional fault zone produced in the Daning Ningxia granodiorite body are studied. With the development of deformation, its deformation properties gradually transition from brittle deformation dominant to plastic deformation dominant, and the formation of horizontal zoning. The authors call this transitional faulted rock, which is different from the series of clastic rocks and mylonites, as the “series of clastics.” Amendments and additions were made to the fault double-layer model of the predecessor, and a new fault rock classification scheme was proposed.