Evolution and characterization of fracture patterns: Insights from multi-scale analysis of the Buxa dolomite in the Siang Valley, Arunachal Lesser Himalayan fold-thrust belt

Basa, Abhisek; Ahmed, Farzan; Bhattacharyya, Kathakali; Roy, Abhijit Guha

doi:10.1016/j.jsg.2019.03.004

Cited by 22 publications

(7 citation statements)

References 88 publications

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“…The MBT sheet forms a fault-bend antiform. Based on the unfolding of strata, early formed low-and moderate-angle fractures are interpreted to be pre-folding layer-parallel shortening structures, while the dominant late-stage high-angle fractures are inferred to have formed synchronous to folding, tracking the progressive deformation of the orogenic wedge (Basa et al, 2019). The high-angle fracture set is the dominant one at both outcrop and microscopic scales.…”

Section: Arunachal Pradeshmentioning

confidence: 99%

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Tectonics of the Western, Sikkim and Arunachal Himalaya

Jain¹,

Thakur²,

Joshi³

et al. 2020

PINSA

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During the period 2016-2020, the Indian scientists undertook extensive research in the Himalayan Orogen, which incorporated extensive field mapping, structural analysis, geochemistry, metamorphic and igneous petrology, stratigraphy and palaeontology, Ar/Ar and U-Pb geochronology, besides low-temperature thermochronology. These activities were almost spread throughout the belt from western sector through Garhwal-Kumaon, Sikkim, Bhutan and Arunachal Pradesh. In addition, research was also undertaken using magnetotelluric methods for large-scale tectonics, seismology, paleoseismology and other disciplines, which are covered in other contributions. National laboratories have now started generating highresolution U-Pb dates, which have been providing impetus to model Himalayan tectonics, besides modelling its Paleoproterozoic and Neoproterozoic configuration.

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Section: Arunachal Pradeshmentioning

confidence: 99%

“…In the far-eastern Arunachal, the Himalaya, evolution of fractures from the Buxa dolomite of the frontal segment of the Main Boundary Thrust (MBT) sheet was addressed (Basa et al, 2019). The MBT sheet forms a fault-bend antiform.…”

Section: Arunachal Pradeshmentioning

confidence: 99%

Tectonics of the Western, Sikkim and Arunachal Himalaya

Jain¹,

Thakur²,

Joshi³

et al. 2020

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“…The Pyrenees is an E-W striking orogenic system that formed as the Iberian and European plates collided from the late Cretaceous to Miocene times (Roest and Srivastava, 1991;Rosenbaum et al, 2002; Muñoz, 1992Muñoz, , 2002, and it constitutes an asymmetric, doubly vergent orogenic wedge above the northward subduction of the Iberian lithosphere beneath the European plate (Chevrot et al, 2018). As a result, the Ebro Basin formed as a flexural foreland developed on the downgoing Iberian plate at the southern margin of the chain (Beaumont et al, 2000). In the study area, to the south of the Ebro Basin ( Fig.…”

Section: Geological Frameworkmentioning

confidence: 99%

Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern Pyrenees

et al. 2020

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Abstract. Joint systems in the eastern portion of the Ebro Basin of the eastern Pyrenees enjoy near continuous exposure from the frontal portion of the belt up to the external portion of its associated foredeep. Utilizing orthophoto mosaics of these world-class exposures, we have manually digitized over 30 000 joints within a 16 km×50 km study area. The mapped traces exhibit orientations that are dominantly perpendicular to the trend of the belt (transverse) and, subordinately, parallel to the belt (longitudinal). In particular, joints systematically orient perpendicular to the trend of the belt both in the frontal folds and in the inner and central portion of the foredeep basin. Longitudinal joints occur rarely with a disordered spatial distribution, exhibiting null difference in abundance between the belt and the foredeep. Joint orientations in the external portion of the foredeep become less clustered, with adjacent areas dominated by either transverse or oblique joints. Our data indicate that joints in the studied area formed in the foredeep in response to a foredeep-parallel stretching, which becomes progressively less intense within the external portion of the foredeep. There, the minimum stress direction becomes more variable, providing evidence of the poor contribution of the forebulge-perpendicular stretching on stress organization.

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“…Based on field examples and morphometric calculations, Bhakuni et al (2017) emphasize the role of transverse faults and their interaction with the Himalayan thrusts in the development of neotectonic geomorphic features along the Himalayan mountain front in eastern Arunachal Pradesh. Detailed investigation of fractures by Basa et al (2019) from a fault-bend fold at the Main Boundary Thrust sheet (Location 8 in Fig. 1), Arunachal Lesser Himalaya, shows that fracture spacing is a scale-independent process, but the coefficients of the variation of spacing (C V ) is not.…”

Section: Arunachal Pradesh (Ap)mentioning

confidence: 99%

Tectonics of Sikkim and Eastern Himalaya

Gupta¹,

Bose²

2020

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In India, the Eastern Himalaya broadly refers to the region east of Bhutan, and conventionally, Darjeeling and Sikkim are generally included within its domain. This report is a compilation of some of the publications since 2016, made by, or in collaboration with Indian scientists who have discussed various geoscientific aspects of the Eastern Himalaya. From the standpoint of the geological input to tectonic framework, studies dealing with structural, metamorphic and geophysical aspects have been compiled in this report, based on the publications from Darjeeling-Sikkim and Arunachal Himalayas, which are the Indian components of the Eastern Himalaya.

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Evolution and characterization of fracture patterns: Insights from multi-scale analysis of the Buxa dolomite in the Siang Valley, Arunachal Lesser Himalayan fold-thrust belt

Cited by 22 publications

References 88 publications

Tectonics of the Western, Sikkim and Arunachal Himalaya

Tectonics of the Western, Sikkim and Arunachal Himalaya

Transverse jointing in foreland fold-and-thrust belts: a remote sensing analysis in the eastern Pyrenees

Tectonics of Sikkim and Eastern Himalaya

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