Delineation of lithostructural domains in northern Orissa (India) from Landsat Thematic Mapper imagery

Nash, C. R.; Rankin, Leigh R.; Leeming, P.M.; Harris, Lyal B.

doi:10.1016/0040-1951(95)00187-5

Cited by 66 publications

(37 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In structural geology, satellite images help to identify materials and their structure, independent of their age and kind of deformation (Jutz and Chorowicz, 1993;Drury and Berhe, 1993;Nash et al, 1996). These images are especially useful for recognising linear structures and lineaments, de®ned by Sabins (1987) as straight linear features, presumably expressing a subsurface phenomenon, that dier distinctly from the patterns of adjacent features.…”

Section: The Problem Of Lineament Analysismentioning

confidence: 99%

LINDENS: A program for lineament length and density analysis

Sáinz

Cortés

Maestro

et al. 2000

Computers & Geosciences

View full text Add to dashboard Cite

Analysis of lineaments from satellite images normally includes the determination of their orientation and density. The spatial variation in the orientation and/or number of lineaments must be obtained by means of a network of cells, the lineaments included in each cell being analysed separately. The program presented in this work, LINDENS, allows the density of lineaments (number of lineaments per km 2 and length of lineaments per km 2 ) to be estimated. It also provides a tool for classifying the lineaments contained in dierent cells, so that their orientation can be represented in frequency histograms and/or rose diagrams. The input ®le must contain the planar coordinates of the beginning and end of each lineament. The density analysis is done by creating a network of square cells, and counting the number of lineaments that are contained within each cell, that have one of their ends within the cell or that cross-cut the cell boundary. The lengths of lineaments are then calculated. To obtain a representative density map the cell size must be ®xed according to: (1) the average lineament length; (2) the distance between the lineaments; and (3) the boundaries of zones with low densities due to lithology or outcrop features. An example from the Neogene Duero Basin (Northern Spain) is provided to test the reliability of the density maps obtained with dierent cell sizes. 7

show abstract

Section: The Problem Of Lineament Analysismentioning

confidence: 99%

LINDENS: A program for lineament length and density analysis

Sáinz

Cortés

Maestro

et al. 2000

Computers & Geosciences

View full text Add to dashboard Cite

show abstract

“…Metamorphic differentiation and partial melting during early phases of folding and granulite facies metamorphism have produced a pervasive gneissic fabric in the rocks. Several ductile and brittle-ductile shear zones dissect the mobile belt in diverse orientations [Chetty and Murthy, 1994;Mahalik, 1994;Nash et al, 1996]. The most significant amongst them is the Terrane Boundary Shear Zone (TBSZ) that defines the tectonic margin of the EGMB with the surrounding cratons .…”

Section: Structurementioning

confidence: 99%

Timing and dynamics of the juxtaposition of the Eastern Ghats Mobile Belt against the Bhandara Craton, India: A structural and zircon U‐Pb SHRIMP study of the fold‐thrust belt and associated nepheline syenite plutons

2007

View full text Add to dashboard Cite

Sensitive High Resolution Ion MicroProbe (SHRIMP) U‐Pb dating of zircon from basement granite gneisses and nepheline syenites of the Sinapalli Nappe, occurring along the northwestern margin of the Eastern Ghats Mobile Belt, indicate high grade regional metamorphism and associated folding accompanying juxtaposition of the nappe with the Bhandara Craton, to have taken place between 617 ± 85 Ma (lower intercept age of a reworked basement unit) and 517 Ma (age of the youngest syenite). This shows, for the first time, that the final juxtaposition of the northwestern parts of the Eastern Ghats Mobile Belt against the Bhandara Craton came about in the late Neoproterozoic and not, as previously thought, during the Mesoproterozoic. The northwestern part of the Eastern Ghats Mobile Belt comprises a fold‐ thrust belt consisting of a stack of northwesterly verging nappes that have been thrust over the Bhandara Craton. The Sinapalli Nappe is the lowermost nappe and rests over a tectonic contact on the Archean granites and gneisses of the craton. The basal décollement is exposed as a two‐km‐wide ductile‐brittle thrust, hosting nepheline syenite plutons that show fabrics consistent with a synkinematic emplacement during thrusting. The Sinapalli Nappe is comprised of a sequence of alternating mafic granulites and quartzofeldspathic gneisses with slivers of basement granites, which are folded in three phases of folding (F1, F2 and F3) and were subjected to granulite facies metamorphism during F1 folding. Thrusting is synkinematic to F2 folding and is responsible for the juxtaposition of the northwestern part of the Eastern Ghats Terrane over the Bhandara Craton during the assembly of parts of eastern Gondwana.

show abstract

“…This Province is mainly a low-to medium-grade volcanosedimentary sequence which is similar to the Iron Ore Group and on which basis it was earlier assigned to the Singhbhum craton by Mahalik (1994). On the contrary, Nash et al (1996) regarded them as a cover sequence to the south-dipping charnockitic-migmatitic gneisses of Angole within EGMB. The Rengali Province is dissected by faults and exposes a block of granulite facies gneisses and mafic granulites-the Badarma Complex, which is also included by Dobmeier and Raith in the Rengali Province.…”

Section: Rengali Provincementioning

confidence: 95%

“…Dobmeier and Raith, 2003). See text for details Two of these four Provinces are further divided into Domains separated by mega lineaments and shear zones, following the works of Nash et al (1996) and Crowe et al (2001), but ignoring the lineaments recognized in the central part of the EGMB by Chetty and Murthy (1998).…”

Section: Newer Divisions Of the Eastern Ghats Mobile Beltmentioning

confidence: 98%

Eastern Ghats Mobile Belt

Sharma

2009

Cratons and Fold Belts of India

View full text Add to dashboard Cite

Delineation of lithostructural domains in northern Orissa (India) from Landsat Thematic Mapper imagery

Cited by 66 publications

References 5 publications

LINDENS: A program for lineament length and density analysis

LINDENS: A program for lineament length and density analysis

Timing and dynamics of the juxtaposition of the Eastern Ghats Mobile Belt against the Bhandara Craton, India: A structural and zircon U‐Pb SHRIMP study of the fold‐thrust belt and associated nepheline syenite plutons

Eastern Ghats Mobile Belt

Contact Info

Product

Resources

About