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Dubey, A. K.
- Development of Flexural Slip Folds, Overlapping Boudins and Extension Faults in Multilayered Materials: Field Evidence and Experimental Model
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Authors
A. K. Dubey
1,
H. Behzadi
2
Affiliations
1 Wadia Institute of Himalayan Geology, 15 Municipal Road, Dehra Dun 248001, IN
2 Department of Geology, School of Sciences, Ferdowsi University, Mashad, IR
1 Wadia Institute of Himalayan Geology, 15 Municipal Road, Dehra Dun 248001, IN
2 Department of Geology, School of Sciences, Ferdowsi University, Mashad, IR
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 22, No 6 (1981), Pagination: 274-284Abstract
Structural features of natural chevron folds were studied in north Cornwall, England and an experiment was performed to simulate these structures. The study reveals that the amount of interstitial flow (Biot, 1965) varies along the fold limb and this variation is attributed to the formation of, (1) limb thinning and hinge thickening, (2) variation in the intensity of development of extension faults along the fold limb, and (3) development of overlapping boudins.
- Contact Course on Experimental Structural Geology
Abstract Views :179 |
PDF Views:129
Authors
Affiliations
1 Dept. of Geology Lucknow University Lucknow, IN
2 Dept. of Geology, BHU, Varanasi - 221 005, IN
3 Wadia Institute of Himalayan Geology, Dehra Dun - 248 001, IN
1 Dept. of Geology Lucknow University Lucknow, IN
2 Dept. of Geology, BHU, Varanasi - 221 005, IN
3 Wadia Institute of Himalayan Geology, Dehra Dun - 248 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 65, No 4 (2005), Pagination: 507-508Abstract
No Abstract.Full Text
- Structural and Magnetic Fabric Studies of Recess Structures in the Western Himalaya: Implications for 1905 Kangra Earthquake
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Authors
Affiliations
1 Wadia Institute of Himalayan Geology, Dehradun - 248 001, IN
1 Wadia Institute of Himalayan Geology, Dehradun - 248 001, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 75, No Spl Iss 1 (2010), Pagination: 225-238Abstract
Kinematic information from deformation structures and magnetic fabrics are used to infer recent tectonics around Kangra and Dehradun recesses, western Himalaya. Three types of magnetic fabrics (Type I&II, III, and IV) are identified based on the angle between K3 axis and bedding pole. It was observed that Kangra recess shows more mature fabric type IV as compared to Dehradun recess, where orientation of K3 axes and tectonic fabric reveals dominance of superposed deformation. In the vicinity of Dehradun recess, normal faults occur in un-indurated Quaternary fan deposits confirming their recent formation. The observations are in conformity with earlier studies that during the 1905 Kangra earthquake, the Main Boundary Thrust (MBT) (or one of its subsidiary thrusts) near Kangra showed thrusting whereas the MBT near Dehradun underwent either normal faulting or post seismic adjustments characteristic of normal faulting. The thrusting could be a result of subsurface processes whereas the normal faulting was a result of prevailing surface strains.Keywords
Anisotropy of Magnetic Susceptibility, Himalayan Seismicity, Magnetic Fabric Type, Superimposed Deformation.References
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