Uptake of trace elements by water lettuce (Pistia stratiotes)     

M. K. C. Sridhar 《洁净——土壤、空气、水》1988,16(3):293-297

Pistia stratiotes L. obtained from a eutrophic lake in Ibadan, Nigeria was examined for its mineral and trace element composition. The study indicated that the shoot system accumulated more potassium, calcium and magnesium, whereas the root system accumulated significantly more cadmium, chromium, cobalt, copper, iron, lead, manganese, mercury, nickel, sodium and zinc. The possible utilization of this aquatic plant for the treatment of polluted waters and industrial effluents is discussed.  相似文献   

Structure of the crystalline basement in the West Bengal basin, India, as determined from DSS studies     

K. L. Kaila  P. R. K. Murty  N. Madhava Rao  I. B. P. Rao  P. Koteswara Rao  A. R. Sridhar  A. S. N. Murthy  V. Vijaya Rao  B. R. Prasad 《Geophysical Journal International》1996,124(1):175-188

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Spatio-temporal trends of rainfall across Indian river basins     

Bisht  Deepak Singh  Chatterjee  Chandranath  Raghuwanshi  Narendra Singh  Sridhar  Venkataramana 《Theoretical and Applied Climatology》2018,132(1-2):419-436

Theoretical and Applied Climatology - Daily gridded high-resolution rainfall data of India Meteorological Department at 0.25° spatial resolution (1901–2015) was analyzed to detect the...  相似文献   

Morphotectonic and petrological variations along the southern Central Indian Ridge     

Ranadhir Mukhopadhyay  Sridhar D. Iyer  Dwijesh Ray  S. M. Karisiddaiah  Rajendra K. Drolia 《International Journal of Earth Sciences》2016,105(3):905-920

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Mapping lithology and assessing recharge characteristics in a granitic hard rock aquifer: Inference from 2D resistivity,induced polarization,tracer and moisture measurements     

Dewashish Kumar  G. B. K. Shankar  Setbandhu Mondal  V. Venkatesam  K. Sridhar  P. N. Rao  Pandith Madhnure  R. Rangarajan 《Journal of the Geological Society of India》2016,88(1):29-38

Two dimensional Electrical Resistivity Tomography (ERT) investigation along with Time Domain Induced Polarization (TDIP) investigation covering 1.6 km line were carried out at 3 natural recharge sites in a overexploited groundwater granite watershed, situated in a semi arid region in the state of Telangana, India. At these sites, shallow and/ or deep moisture influx measurements were also carried out using injected tritium tracer and neutron moisture probe. The watershed is covered by sandy loam to silt loam soil, receives an average annual rainfall of 620 mm with the pre monsoon groundwater level ranging from 8m to 29m bgl. The spot investigations were done to assess and understand the recharge process and groundwater potential in terms of resistivity/conductivity and moisture characteristics of the subsurface rock formation.  相似文献   

Integrated geophysical and geological studies for mineral prospecting in Betul-Chhindwara belt (BCB), Central India   总被引：1，自引：0，他引：1  

Dewashish Kumar  D. V. Subba Rao  K. Sridhar  M. Satyanarayanan  Prasanta K. Patro 《Journal of the Geological Society of India》2016,87(4):383-396

Integrated study combining high resolution electrical resistivity tomography and time domain induced polarization was carried out in Betul-Chhindwara belt Madhya Pradesh, Central India in order to evaluate and delineate the polymetallic sulphide mineralization, its nature, type of deposit and depth. On interpretation of the models results clear cut anomalies revealed showing chargeability ～2 to 54 mV/V up to a maximum depth of 131m. This range of chargeability signify signature of metallic conductor. Nevertheless the basement rock is clearly mapped, showing substantial resistivity contrast. In addition detailed analysis of the integrated results from geology, geochemistry and Scanning Electron Microscope–Energy Dispersive X-ray Spectroscopy resulted from in situ rock samples shows good correlation with resistivity and IP results. This integrated study confirms the presence of conducting sulphide mineral ore body and the results and findings need test drilling at the geophysical anomalous site(s) to confirm the depth persistence and evaluate the metallic conductor.  相似文献   

Distribution and Origin of Seamounts in the Central Indian Ocean Basin     

Pranab Das  Sridhar D. Iyer  V. N. Kodagali  K. S. Krishna 《Marine Geodesy》2005,28(3):259-269

Approximately 200 seamounts of different dimensions have been identified, from multibeam bathymetry maps of the Central Indian Ocean Basin (CIOB) (9°S to 16°S and 72°E to 80°E), of which 61% form eight chains that trend N-S. The seamounts are clustered above and below 12°S latitude. Area II (9°-12°S) shows a concentration of smaller seamounts (≤400 m height), and area I (12°-15°S) has a mixed population (including both less and more than 400 m height). Inspite of the differences in their height, the seamounts of these eight chains are morphologically (slope angle, flatness, basal width) corelatable. Furthermore, we suggest that height-width ratio could be useful in identifying the style of seamount eruption. The seamount chains in the CIOB probably originated from propagative fractures and were produced between 61 and 52 Ma (chrons A26 to A23) as a result of the interaction between the conjugate crusts of the Central Indian and Southeast Indian Ridges during the Indo-Eurasian collision event.  相似文献   

Genesis of Central Indian Ocean basin seamounts: morphological,petrological, and geochemical evidence     

Iyer  Sridhar D.  Amonkar  Ankeeta Ashok  Das  Pranab 《International Journal of Earth Sciences》2018,107(7):2517-2538

International Journal of Earth Sciences - We present the petrological investigation carried out of the seamounts located between water depths of 4300 and 5385 m in the Central Indian Ocean...  相似文献   

Analyses of Aeromagnetic Data to Delineate Basement Structures and Reveal Buried Igneous Bodies in Kaladgi Basin,Karnataka     

M. Sridhar  A. Markandeyulu  A. S. Chawla  A. K. Chaturvedi 《Journal of the Geological Society of India》2018,91(2):165-173

Aeromagnetic data overcome constrain of inadequate exposures and provide signatures of bodies beneath sediment cover. Present work on analysis of aeromagnetic data over western part of Kaladgi basin provided insight into the basement structures and their role in basin evolution. In the study area, the NW-SE and NE-SW are the major trends of magnetic lineament followed by E-W and N-S trends.Archean to Paleoproterozoic basement is manifested by two structural zones, NW-SE trends related to major lineaments within the basement and the NE-SW trends presumed intra-basinal fault systems which controlled the local depressions. The basin configuration deduced from depth to basement show that the Kaladgi basin is an open deep basin and divided into several sub-basins, separated by fault-controlled NE-SW and NW-SE oriented basement ridges. An intriguing find in the western part are the numerous scattered smaller-scale, circular or semicircular, distinct magnetic anomalies of moderate to strong magnetic signal with strong remenance. Analyses coupled with 3D inversions in combination with sub-surface probing reveal in-homogeneities within basement gneisses and supracrustal rocks of the Kaladgi basin, Dharwar craton. 3D inversions of these circular bodies, suggest that they are apophyses of the intrusions or alternatively as younger intrusive stocks. Sub-surface probing by boreholes over circular bodies revealed leucocratic granite with porphyritic texture emplaced as intrusive within the Chitradurga metasediments. This implies that these intrusives are post-Chitradurga schist and pre Badami sediments as they have not affected the latter. However, they can be presumed to be coeval to potassic granites, which intrude the eastern part of the western Dharwar craton in southern India, until geochronological data are available.  相似文献   

Analysis of the daily rainfall events over India using a new long period (1901–2010) high resolution (0.25° × 0.25°) gridded rainfall data set     

D. S. Pai  Latha Sridhar  M. R. Badwaik  M. Rajeevan 《Climate Dynamics》2015,45(3-4):755-776

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