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Joshi, R.
- Morphotectonic Evolution of the Laterite Profiles over Sukinda Ultramafics, Jaipur District, Orissa
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Authors
Affiliations
1 Geological Survey of India, Opn.WB-S-A&N, 4, Chowringhee Lane, Calcutta 16, IN
2 Geological Survey of India, Unit:8, Nayapalli, Bhubaneswar 12, IN
1 Geological Survey of India, Opn.WB-S-A&N, 4, Chowringhee Lane, Calcutta 16, IN
2 Geological Survey of India, Unit:8, Nayapalli, Bhubaneswar 12, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 52, No 4 (1998), Pagination: 449-456Abstract
Sukinda ultramafic field of Jajpur district, Orissa is capped by thick lateritic duricrust. Two generations of laterite are inferred in the studied area. The older laterite (in situ) is capped by transported laterite (younger). The entire area is divided into two subareas (A1 and A2) Physiographically, three terraces are identified in A1 area, of which, the oldest one (T3) comprises of insitu lateritic hard crust. The other two terraces (T2 and T1) are made up of valley fill deposits, which are later lateritised. The area A2 shows the lateral continuity of T3 terrace of A1 area along with valley fill deposit of T1 terrace and the absence of T2 terrace. Drainage analysis show the A1 area is structurally more disturbed than A2 area. Correlation of geomorphological evolution and lateritisation indicates three stages of development in the A1 area. Lateritisation was initiated on a comparatively flat ground (T3 terrace) and subsequent destabilisation of the area developed the younger terraces (T2 and T1) with the modification of older laterite profile.Keywords
Geomorphology, Laterite, Morphometric Evolution, Sukinda, Orissa.- Geochemistry of Groundwater Over Sukinda Ultrabasic - Basic Rocks, Jajpur District, Orissa
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Authors
Affiliations
1 Geological Survey of India, Opn. WB-S-A&N, 4, Chowringhee Lane, Calcutta 700 016, IN
2 Geological Survey of India, Opn. Orissa, Unit: 8; Nayapalli, Bhubaneswar 751012, IN
1 Geological Survey of India, Opn. WB-S-A&N, 4, Chowringhee Lane, Calcutta 700 016, IN
2 Geological Survey of India, Opn. Orissa, Unit: 8; Nayapalli, Bhubaneswar 751012, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 54, No 1 (1999), Pagination: 73-81Abstract
The geochemistry of groundwater over Sukinda ultrabasic - basic rocks, Orissa, covering an areat extent of about 50 km2, has been investigated to understand the hydrogeology of the area. The dominant geochemical processes were interpreted from geochemical data and mass balance calculations. The entire study area contains two broad lithounits comprising ultrabasic rock at the centre and metabasics at eastern and western flanks, with a general groundwater flow pattern from east to west. The groundwater in the area is fresh, meteoric in origin with high Na, Kover metabasics as well as the northern part of the ultrabasic rock, and high Mg, HCO3- and TDS over the remaining ultrabasic rock. Mineral solubility study of Mg- phases present in the system shows that the present day geochemical conditions are not suitable for Mg2+ precipitation and most likely, serpentine is the dominant Mg2+ contributer in the system. Mass balance calculations based on mixing ratio along the E-W flow path show that K and to some extent Na behave conservatively in the evolution of groundwater. The conservative mixing model presented here evaluates the formation of secondary mineral phases along the flow path.Keywords
Geochemistry, Groundwater, Mass Balance Calculation, Sukinda, Orissa.- Ni-Enrichment and Mass Balance in Sukinda Laterites, Jajpur District, Orissa
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Authors
Affiliations
1 Geological Survey of India, Op. WB-S-A&N, GSI Office Complex, DK-Block, Sector II, Salt Lake City, Kolkata -700 091, IN
2 Geological Survey of India, Op. U.P., Vasundhara, Sector-E, Aligunj, Lucknow - 226 024, IN
1 Geological Survey of India, Op. WB-S-A&N, GSI Office Complex, DK-Block, Sector II, Salt Lake City, Kolkata -700 091, IN
2 Geological Survey of India, Op. U.P., Vasundhara, Sector-E, Aligunj, Lucknow - 226 024, IN