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Das, Ayanangshu
- Magnetic Susceptibility as a Proxy for Pollution in Triveni-Bandel Area, Hooghly District, West Bengal, India
Abstract Views :196 |
PDF Views:66
Authors
Supriya Mondal
1,
Saurodeep Chatterjee
1,
Rimjhim Maity
1,
Debesh Gain
1,
Ayanangshu Das
1,
Saikat Sinha
1
Affiliations
1 Department of Geological Sciences, Jadavpur University, Kolkata 700 032, IN
1 Department of Geological Sciences, Jadavpur University, Kolkata 700 032, IN
Source
Current Science, Vol 112, No 11 (2017), Pagination: 2306-2311Abstract
This study aims at tracing the distribution and concentration of contaminants in fly ash along roads and highways with appreciable traffic by using magnetic proxies. Magnetic susceptibility is used for pollution mapping in the field. The distribution of susceptibility values represents polluted areas strongly influenced by traffic frequency, roadside topography, meteorological conditions (e.g. wind direction) and other factors. A magnetic phase was found to be responsible for the enhancement of magnetic signal in roadside ash. Magnetic methods provide effective tools for delineation of industrial pollution such as fly ash. In the area studied, magnetic susceptibility proved to be an excellent proxy for analysis of intensity of pollution yielding interesting results.Keywords
Bandel, Fly Ash, Magnetic Proxies, Magnetic Susceptibility, Pollution.References
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- Comparison of Stress Azimuth Data Derived by Geogenic Electromagnetic Radiation Technique and from the Analysis of Exhumation Joints
Abstract Views :268 |
PDF Views:72
Authors
Affiliations
1 Earth and Environmental Sciences, Indian Institute of Science Education and Research, Bhopal Bypass Road, Bhauri, Bhopal 462066, IN
1 Earth and Environmental Sciences, Indian Institute of Science Education and Research, Bhopal Bypass Road, Bhauri, Bhopal 462066, IN
Source
Current Science, Vol 115, No 6 (2018), Pagination: 1039-1041Abstract
During the last decade, considerable progress has been made to understand the cause and nature of electromagnetic emission anomalies that precede major earthquakes1,2. Based on field measurements using a portable instrument, the preferred orientations of geogenic electromagnetic radiation (EMR), especially the principal directions of radiation have been proved to be reproducible and are related to the stress field of the lithosphere3– 6.References
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- Genesis of the Dhuadhar Falls, Bhedaghat, Madhya Pradesh, India
Abstract Views :254 |
PDF Views:68
Authors
Affiliations
1 Earth and Environmental Sciences, Indian Institute of Science Education and Research, Bhopal Bypass Road, Bhauri, Bhopal 462 066, IN
1 Earth and Environmental Sciences, Indian Institute of Science Education and Research, Bhopal Bypass Road, Bhauri, Bhopal 462 066, IN
Source
Current Science, Vol 116, No 8 (2019), Pagination: 1292-1294Abstract
Dhuadhar Falls in Bhedaghat near Jabalpur, one of the most sought after tourist destinations in Madhya Pradesh, India, attracts thousands of tourists throughout the year. The mighty River Narmada drops (Figure 1 a) 30 m down into a deep gorge of marble rocks, creating one of the most beautiful natural sites. Although there is a lot of literature available describing the surrounding rocks like marbles and schists of Precambrian Mahakoshal group, Lamheta Formation of the Cretaceous and the Deccan Traps1–3, there is hardly any work explaining the genesis of the Falls itself. The River Narmada flows almost in a straight line along the Narmada–Son Lineament (NSL) marking the boundaries of some of the important basins of India4.References
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- Establishment of Correlation between Anisotropy of Magnetic Susceptibility and Magma Flow Fabric:An Insight from Nandurbar–Dhule Dyke Swarm of Deccan Volcanic Province
Abstract Views :252 |
PDF Views:81
Authors
Affiliations
1 Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research, Bhopal 462 066, IN
1 Department of Earth and Environmental Sciences, Indian Institute of Science Education and Research, Bhopal 462 066, IN
Source
Current Science, Vol 116, No 9 (2019), Pagination: 1468-1471Abstract
There are rising concerns about the robustness of interpretation from Anisotropy of Magnetic Susceptibility (AMS) studies, because often correlation between AMS and geological fabric is not properly established before a wide regional- scale interpretation is made. Here, we document case studies on two dykes from the Nandurbar–Dhule dyke swarm (western India) of Deccan Volcanic Province (Figure 1 a), where we have tested if shape-preferred orientation of the elongated mineral grains (flow fabric) is actually represented by AMS fabric. In one of the dykes, we observed that AMS fabric is coplanar with the fabric of major constituent silicate minerals; hence it represents magma flow fabric. In the other dyke, AMS fabric largely represents the shape fabric of the opaque minerals which were deposited in the interstitial spaces of the mineral grains after the dyke was emplaced; hence it does not correspond to the primary magma flow fabric. These findings reinforce the need for detailed understanding of rock fabric in order to make robust interpretation of AMS data.References
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