Localized strain within tabular ductile shear zones is developed from micro- to meso- to even large scales to form complex structures. They grow in width and length through linkage of segments with progressive accumulation of strain and displacement, and finally produce shear zone networks characterized by anastomosing patterns. Singhbhum shear zone (SSZ) represents a large composite zone characterized by a collage of different dismembered lithotectonic segments, with heterogeneous structural features, within a matrix typical of a shear zone. Structural features indicate that the material properties of protoliths have a great role in controlling the mechanics of deformation. Meso- and micro-scale structural studies of the east-central part of the SSZ reveal ‘tectonic complex like’ (? deeper level equivalent of mélange type complex) assemblage of dismembered lithoteconic units. Shear-induced foliations, S, C and C′, were developed while the main mylonitic foliation is represented by C-plane. Apart from that, shear lenses are exceptionally well developed in both meso- and micro-scale in most of the units, particularly in schistose rocks. They were formed from different processes during progressive simple shear, which includes (1) anastomosing C-planes, (2) intersection between C- and C′-planes, (3) disruption of stretched out longer limbs of asymmetric folds, and (4) cleavage duplex. Fabrics recorded in rocks indicate that there was a progressive change in the development of predominantly flattening fabric (coaxial pure shear) in the northern part (outside the SSZ), to simple-shear non-coaxial type deformation producing shear fabric, dominating over the flattening fabric, in the southern part (within the SSZ) that is in close proximity with the Singhbhum Craton. Although an overall plane strain simple shear model is apparent, occasional presence of extensional features along two directions of the mylonitic foliation, demonstrative of three-dimensional deformation (simple shear and flattening: X > Y > 1 > Z), may indicate the stretching nature of the SSZ. From the orientation of oblique grain shape fabric [ISA_max (θ < 45°)], there is slight deviation from simple shear, i.e., a sub-simple nature of plane strain shear could be inferred. However, in conformity with simple shear model the ubiquitously developed stretching lineation shows consistency in orientation being parallel to the movement direction. There is no evidence of transpression. Shear sense indicators invariably indicate up-dip ductile thrust movement with vergence top-to-the south. Microstructural deformational characteristics indicate that peak temperature attained during the deformation in shear zone was ~600 °C. Prolonged period of metasomatism, induced by fluid influx, played an important role in strain softening during the development of SSZ.

板状韧性剪切区内的局部应变从微尺度发展到中等尺度甚至大尺度，以形成复杂的结构。它们通过节段的链接随着应变和位移的逐渐积累而在宽度和长度上增长，最终产生以吻合方式为特征的剪切带网络。Singhbhum剪切带（SSZ）代表一个较大的复合带，其特征是在剪切带典型的基质内，由不同肢解的碎屑构造片段组成的拼贴，具有非均质的结构特征。结构特征表明，原石的材料特性在控制变形力学方面具有重要作用。对SSZ中东部部分的中微尺度结构研究揭示了肢解的石锥单元的“构造复合体”（更深层次的相当于混杂体类型的复合体）的组合。剪切诱导的叶片S，C和C'发达，而主要的淀粉样叶性则以C平面表示。除此之外，在大多数单位，特别是在片岩中，剪切透镜在中尺度和微观尺度上都异常发达。它们是在渐进式简单剪切过程中由不同过程形成的，包括（1）将C平面吻合，（2）C和C'平面之间的相交，（3）拉伸延伸的较长的不对称褶皱肢体，以及（4） ）切割双链体。岩石中记录的织物表明，北部地区（SSZ以外）的主要变平织物（同轴纯剪切）的发展有逐渐变化的趋势，变成了简单剪切非同轴变形的剪切织物，在变平中占主导地位织物，在南部区域（SSZ内），靠近Singhbhum Craton。尽管整体平面应变简单剪切模型是显而易见的，但沿髓鞘叶的两个方向偶尔出现延伸特征，表明三维变形（简单剪切和展平：X> Y> 1> Z），可能表明其拉伸性质SSZ的 从斜纹织物的方向[ISA 在与Singhbhum Craton紧邻的南部地区（SSZ内），以简单剪切的非同轴型变形产生的剪切织物为主，在扁平织物上占主导地位。尽管整体平面应变简单剪切模型是显而易见的，但沿髓鞘叶的两个方向偶尔出现延伸特征，表明三维变形（简单剪切和展平：X> Y> 1> Z），可能表明其拉伸性质SSZ的 从斜纹织物的方向[ISA 在与Singhbhum Craton紧邻的南部地区（SSZ内），以简单剪切的非同轴型变形产生的剪切织物为主，在扁平织物上占主导地位。尽管整体平面应变简单剪切模型是显而易见的，但沿髓鞘叶的两个方向偶尔出现延伸特征，表明三维变形（简单剪切和展平：X> Y> 1> Z），可能表明其拉伸性质SSZ的 从斜纹织物的方向[ISA 三维变形（简单的剪切和展平：X> Y> 1> Z）的说明，可能表明SSZ的拉伸性质。从斜纹织物的方向[ISA 三维变形（简单的剪切和展平：X> Y> 1> Z）的说明，可能表明SSZ的拉伸性质。从斜纹织物的方向[ISA_max（θ <45°）]时，与简单剪力略有偏差，即可以推断出平面应变剪的次简单性质。但是，根据简单的剪切模型，普遍开发的拉伸线显示出平行于运动方向的方向一致性。没有证据表明有压迫感。剪切感测指示器始终指示着向上延展的韧性推力运动，其辐散度从上到南。显微组织变形特征表明，剪切区变形过程中达到的峰值温度约为600°C。SSZ发育过程中，由于流体大量涌入引起的交代作用延长，在应变软化中起重要作用。