Discovery of abundant pyroclasts in the Namunagarh Grit, South Andaman: evidence for arc volcanism and active subduction during the Palaeogene in the Andaman area

Bandopadhyay, P.C.

doi:10.1016/j.jseaes.2004.01.007

Cited by 41 publications

(22 citation statements)

References 33 publications

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“…This lithofacies is interpreted as debris flow deposit that had only a limited turbulence and suspension fall out, due to high particle concentrations (e.g., Bandopadhyay, 2005). The dominant flow mechanisms were probably laminar and/or plug flow (Wright and Walker, 1980;Lowe, 1988).…”

Section: Lft4: Coarse-grained Grit Lithofaciesmentioning

confidence: 99%

See 1 more Smart Citation

The volcano-sedimentary succession of the Archean Sodium Group, Ventersdorp Supergroup, South Africa: Volcanology, sedimentology and geochemistry

Altermann

Lenhardt

2012

Precambrian Research

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Section: Lft4: Coarse-grained Grit Lithofaciesmentioning

confidence: 99%

“…Load structures and massive bedding in mudstones imply rapid sedimentation (e.g., Bandopadhyay, 2005).…”

Section: Lft6: Tuffaceous Mudstone Lithofaciesmentioning

confidence: 99%

The volcano-sedimentary succession of the Archean Sodium Group, Ventersdorp Supergroup, South Africa: Volcanology, sedimentology and geochemistry

Altermann

Lenhardt

2012

Precambrian Research

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“…Ophiolite occurrences are reported from almost all the major Andaman Islands, but are well-exposed in the south Andaman Island [3]. As the present study is concentrated on the southern part of south Andaman, only geology of this portion is presented here.…”

Section: Geological Settingsmentioning

confidence: 91%

Identification of Groundwater in Hard Rock Terrain Using 2D Electrical Resistivity Tomography Imaging Technique: Securing Water Scarcity at the Time of Seasonal Rainfall Failure, South Andaman

Sk¹,

Ramanujam²,

Champoil³

et al. 2018

IJG

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Like many of the tropical islands, the population of Andaman and Nicobar Islands, though not directly, relies predominantly upon rain water harvesting to quench their need and also depends on the groundwater sources. In the background of climate change, severity of hydrological cycle is much anticipated which may cause more extreme and unusual precipitation. It is quite essential to have other alternatives. Accordingly, groundwater could be exploited as a potential alternative. The present study intends to find out the potential groundwater source and estimate aquifer parameters in Kodiyaghat (KD) and Burmanallah (BN). As these areas are composed of very hard rock, Wenner-Schlumberger array has been used to carry out a 2D Electrical Resistivity Tomography survey to find out the fracture zone as well as to delineate the aquifer. KD and BN show maximum resistivity of 25,416 Ωm and 5985 Ωm indicate very hard rock terrain. Similarly, the minimum values of resistivity (21.6 Ωm and 30.4 Ωm) were observed at KD and BN define the presence of freshwater aquifers respectively. The aquifer identified was found to be at a depth of 5 m to 19.9 m at KD and 2.5 m to 20 m at BN. The calculated Hydraulic conductivity (14.85 m/day and 30.14 m/day), transmissivity (86.25 m 2 /day and 271.27 m 2 /day) and porosity (28.7% and 31.24%) values at KD and BN confirmed that, the located aquifer was of fresh ground water quality and can be utilized for drinking and house hold purposes. According to the results, almost 70% of the study area is hard rock terrain and 30% comes under potential aquifer zone. The results also show that, both the areas were characterized by Horst How to cite this paper: Sk, M., Ramanujam, N.,

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“…Plagioclase microlites in amorphous dark brown basaltic groundmass characterize the microlitic grains whereas the oriented tabular laths of plagioclase make up the lathwork lithic grains (Critelli and Ingersoll, 1995). Bandopadhyay (2005) also documented the identical vitric and lithic grains and plagioclase from the Namunagarh Grit. Compared to Corbyn's Cove turbidites heavy minerals are less abundant and the zircon grains are mostly prismatic and pale pinkish colour.…”

Section: Kalipur-shibpur North Andamanmentioning

confidence: 95%

“…The Hope Town Conglomerate is a conglomerate dominated formation whereas the Namunagarh Grit is dominated by sandstones (Table 1). Abundant vitric and lithic grains and crystals of neovolcanic origin, implying input from active arc volcanism, and trace fossils and rip-up shale clasts, implying deposition in shallow water, have been recently identified from the Namunagarh Grit (Bandopadhyay, 2005;Bandopadhyay et al, 2009). Karunakaran et al (1968a) recorded variable palaeocurrent directions in rocks of Mithakhari Group and suggested the isolated nature of the depositional basins.…”

Section: Geology Stratigraphy and Agementioning

confidence: 99%

Discovery of abundant pyroclasts in the Namunagarh Grit, South Andaman: evidence for arc volcanism and active subduction during the Palaeogene in the Andaman area

Cited by 41 publications

References 33 publications

The volcano-sedimentary succession of the Archean Sodium Group, Ventersdorp Supergroup, South Africa: Volcanology, sedimentology and geochemistry

The volcano-sedimentary succession of the Archean Sodium Group, Ventersdorp Supergroup, South Africa: Volcanology, sedimentology and geochemistry

Identification of Groundwater in Hard Rock Terrain Using 2D Electrical Resistivity Tomography Imaging Technique: Securing Water Scarcity at the Time of Seasonal Rainfall Failure, South Andaman

Re-interpretation of the age and environment of deposition of Paleogene turbidites in the Andaman and Nicobar Islands, Western Sunda Arc

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