Analysis of lineament swarms in a Precambrian metamorphic rocks in India

Journal of Earth system science

Sukumar Basu Mallik3¹  Tapas Acharya1 2² 

[1] Department of Geological Sciences, Jadavpur University, Kolkata 700 032, India.$$;Department of Geology, Durgapur Government College, University of Burdwan, Durgapur 713 214, India.$$

关键词: Lineament;    fracture;    remote sensing;    hydrology;    data analysis.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

Addressing the geologic significance of lineaments and their correlation with joints/fractures is still unclear. The present study attempts to analyse the lineament swarms developed in a Precambrian metamorphic terrain in India using both unfiltered and filtered techniques. The unfiltered analysis technique shows that the major lineament and fracture trends are oriented along EW and NS directions respectively, thus failing to provide any correlation between them. The application of domain-based filtering techniques identifies a highly predominant fracture-correlated lineaments in mica schist constituting the EW trending shear zone in the area. This correlation is not evident in the areas north and south of the shear zone, where the lineaments are consistently oriented along the foliation planes of the rocks and are designated as ‘foliation correlated’. The present analysis indicates that the fracture frequency and the strain history may have played significant roles for the formation of fracture-correlated lineaments in the metamorphic terrain.

【 授权许可】

Unknown