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Bhandari, Subhash
- Geomorphic Indicators of Active Tectonics in the Karjan River Basin, Lower Narmada Valley, Western India
Abstract Views :202 |
PDF Views:2
Authors
Affiliations
1 Department of Geology, M. S. University of Baroda, Vadodara - 390 002, IN
1 Department of Geology, M. S. University of Baroda, Vadodara - 390 002, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 62, No 6 (2003), Pagination: 739-752Abstract
The Karjan basin is one of the largest tributary basins of the Lower Narmada Valley. A major part of the basin comprises southward dipping basaltic flows of the Deccan Volcanic Group (DVG) delimited to the north by the Narmada- Son Fault. The lineaments indicate a strong control of the ENE-WSW and NNW-SSE trends on the geomorphology and drainage architecture. The ENE-WSW trending ridges with southern slopes and north facing escarpments including the Narmada-Son Fault (NSF) and ENE-WSW trending narrow intramontane valleys evidence the dominant control of ENE-WSW trend. Three tilt blocks have been delineated within a major tilt block formed due to differential uplifts along the NSF and two other sympathetic faults. A gradual decrease in the ruggedness of the topography towards south, preferential locations of river pondings, gorges and increased fluvial incision suggest continued southward tilting of the fault blocks due to differential uplift along ENE-WSW trending faults. The alluvial zone to the north of the Narmada- Son Fault is made up of Late Pleistocene to Holocene sediments and indicates two phases of river incision in the Karjan river basin, which are attributed to uplifts during Early and Late Holocene. Morphometric analyses of parameters sensitive to tectonics substantiate the field observations on active tectonics. The field evidence from the upland and alluvial zone and the morphometric analyses point to differential uplift of the Karjan basin along ENE-WSW trending faults during Holocene.Keywords
Geomorphology, Active Tectonics, Karjan Basin, Western India.
- Formation and Erosion of Holocene Alluvial Fans along the Narmada-Son Fault near Rajpipla in Lower Narmada Basin, Western India
Abstract Views :166 |
PDF Views:147
Authors
Utpal Chakrabarti
1,
Abhinaba Roy
1,
Subhash Bhandari
2,
Rachna Raj
2,
D. M. Maurya
2,
L. S. Chamyal
2
Affiliations
1 Geological Survey of India, Central Region, Nagpur, IN
2 Department of Geology, M. S. University of Baroda, Vadodara-390002, IN
1 Geological Survey of India, Central Region, Nagpur, IN
2 Department of Geology, M. S. University of Baroda, Vadodara-390002, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 60, No 4 (2002), Pagination: 477-478Abstract
No Abstract.Full Text
- Formation and Erosion of Holocene Alluvial Fans along the Narmada-Son Fault near Rajpipla in Lower Narmada Basin, Western India
Abstract Views :188 |
PDF Views:2
Authors
Affiliations
1 Department of Geology, M.S.University of Baroda, Vadodara-390 002, Gujarat, IN
1 Department of Geology, M.S.University of Baroda, Vadodara-390 002, Gujarat, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 58, No 6 (2001), Pagination: 519-531Abstract
Five alluvial fans have been recognised along the Narmada-Son Fault near Rajpipla in the Lower Narmada basin. These have been studied in their proximal, medial and distal parts. Lithofacies characteristics and facies associations indicate debris flows and sheet flood flows as the major processes responsible for aggradation of these fans. The fans have coalesced and formed a fault-bound geomorphic surface during Early Holocene. Sedimentation in an alluvial fan environment during the Early Holocene is not yet known from this part of Western India. Prolonged subsidence along Narmada-Son Fault and two other faults along the Narmada river and its tributary Karjan, have provided ideal site for the accumulation of fan deposits. These alluvial fans suggest differential movement along the Narmada-Son Fault and a humid climate during Early Holocene.Keywords
Alluvial Fans, Holocene, Narmada-Son Fault, Western India.- Identification of Smectites by IR and LIBS Instruments of Supercam Suite Onboard Mars 2020 Perseverance Rover: Comments on the Non-retrieval of First Drill Core
Abstract Views :151 |
PDF Views:107
Authors
Affiliations
1 Space Applications Centre (Indian Space Research Organization), Ahmedabad 380 015, IN
2 Department of Geology and Geophysics, Indian Institute of Technology Kharagpur, Kharagpur 721 302, IN
3 Department of Earth and Environmental Science, KSKV Kachchh University, Bhuj 370 001, IN
1 Space Applications Centre (Indian Space Research Organization), Ahmedabad 380 015, IN
2 Department of Geology and Geophysics, Indian Institute of Technology Kharagpur, Kharagpur 721 302, IN
3 Department of Earth and Environmental Science, KSKV Kachchh University, Bhuj 370 001, IN
Source
Current Science, Vol 123, No 1 (2022), Pagination: 93-96Abstract
Preliminary investigations on the Infrared Spectrometer onboard Mars 2020 Perseverance rover show the presence of Fe-/Mg-smectite minerals near the first drilling site, Roubion. Laser-Induced Breakdown Spectrometer data show characteristic emission peaks for O, H and the major constituent elements of smectites, viz. Si, Fe, Mg, etc. These minerals suggest aqueous alteration of the basaltic floor of the Jezero crater. The mechanically weak nature of this basalt weathering layer holds clues to the non-retrieval of the first drill core. Water confinement capacity and high porosity–permeability make the smectite-rich rock units a good host for preserving macro- and microscopic biosignaturesKeywords
Biosignature, Drill Core, Jezero Crater, Rover, Smectites, Spectroscopic AnalysisFull Text
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