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《Journal of Chengdu University of Technology(Science & Technology Edition)》 2018-03
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Study on rock types and tectonic characteristics in the east junction zone of the Namjagbarwa structural knot

ZOU Zinan;Chengdu Engineering Corporation Limited of PowerChina;  
The Namjagbarwa structural knot belongs to passive continental margin and it has experienced multiple tectonic deformation in the geological historical period.Through geological survey,profile measurement and large number of sampling test,the distribution,composition,structures,physical and mechanical properties of the rocks and the structural characteristics in this junction zone are studied.It is showed that the rock types in the area are varied with different mineral compositions and content and with complex metamorphism.The rock anisotropy and weathering extent are obvious with different physical and mechanical properties,which are affected by the content difference of mica and hornblende,and by the influence of metamorphism,weathering extent,plastic deformation degree and mica enrichment,etc.There are no large brittle faults in the inner and both sides of the junction zone boundary,instead of obvious ductile shear and plastic deformation.All kinds of rock sheets mainly exhibited abrupt welding contacts.In general,the junction zone is composed of a set of rock formations,and brittle fractures are not developed.
【CateGory Index】: P542
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