简述脆性断层构造岩的特征？？谢谢

简述脆性断层构造岩的特征？？谢谢

脆性形变构造岩,包括:1.初裂岩类,主要分为压裂岩、扭裂岩和张裂岩。2.构造角砾岩类,分为张性角砾岩、压性角砾岩和扭性角砾岩。3.碎裂岩类,可细分为碎裂岩、碎斑岩、碎粒岩和碎粉岩。(二)脆-塑性形变构造岩,包括:4.糜棱岩类,又分为粒化岩、粗糜棱岩、糜棱岩和超糜棱岩。5.玻状岩,可分为玻质糜棱岩、玻状岩和变余玻状岩。(三)塑性形变构造岩,包括:6.千糜岩类,可细分为硬板岩、千糜岩、变晶糜棱岩和片糜岩。主要表现为脆性。

Brittle faults are geotechnically problematic because of their complex structure and the tectonically
disturbed weak rocks associated with them (6, 7). Typically, a pattern of shear and tensile
fractures occur in a brittle fault, reflecting the geometry of the displacement field during faulting,
and indicating the orientation of principal stresses. Kinematic indicators such as slickensides
(striations) may be evidence of the latest relative movements.
Brittle faults are extraordinarily important in rock engineering. The geotechnical problems related to faults include their substantial heterogeneity with regard to internal structure, abrupt variations in weak and strong rocks components, and groundwater. The extreme complexity of br ttle faults makes their geotechnical characterization and investigation difficult. The importance of evaluating specific geometrical and geomechanical features of “blockin-
matrix“ rocks for the engineering geological characterisation of fault zones is emphasised. A functional, diagnostic classification of fault rocks is introduced, based on experience from investigation and construction of rock structures such as dams, slopes and tunnels, and consideration of the results of recent research.

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