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Gupta, S. N.
- New Rb-Sr Age of Kanara Granite, South Kanara District, Karnataka State
Abstract Views :195 |
PDF Views:150
Authors
M. N. Balasubrahmanyan
1,
P. K. Bishui
1,
K. C. Chandy
1,
S. N. Gupta
1,
N. K. Jana
1,
D. K. Paul
1,
R. Prasad
1
Affiliations
1 Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta, IN
1 Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 23, No 8 (1982), Pagination: 402-405Abstract
New Rb-Sr isotopic age is presented for the porphyritic phase of Kanara batholith of South Kanara, Karnataka. The porphyritic granite has a good spread of Rb/Sr ratio and indicates an isochron age of 2681 ± 236 Ma with an initial ratio of 0.7022 ± 0.004. The observed low initial Sr ratio suggests its derivation from mantle without much crustal contamination.Full Text
- Geochronology and Geochemistry of Granite Plutons from East Khasi Hills, Meghalaya
Abstract Views :197 |
PDF Views:2
Authors
Subhasish Ghosh
1,
S. Chakraborty
2,
J. K. Bhalla
3,
D. K. Paul
1,
Amitabha Sarkari
1,
P.K. Bishui
1,
S. N. Gupta
1
Affiliations
1 Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta-700 016, IN
2 Petrology Division, Geological Survey of India, North Eastern Region, Shillong, IN
3 Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta - 700 016, IN
1 Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta-700 016, IN
2 Petrology Division, Geological Survey of India, North Eastern Region, Shillong, IN
3 Geochronology and Isotope Geology Division, Geological Survey of India, Calcutta - 700 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 37, No 4 (1991), Pagination: 331-342Abstract
Discordant granite plutons at Kyrdem, Nongpoh and South Khasi intrude the basement gneisses and the overlying Shillong Group of metasediments in the Meghalaya Plateau. Porphyritic granitoids ranging in composition from quartz monzonite to granite represent the dominant component in all the three plutons. Common characteristics of these granitoids arc spatial association with hornblende dioritic rocks, dominantly potassic and metaluminous nature. A positive correlation of SiO2, Na2O + K2O, Rb, Rb/Sr and negative correlation of CaO, MgO, FcO(T), Sr, TiO2 with Differentiation Index in the Kyrdcm pluton point to fractional crystallisation processes. Rb-Sr whole rock isochron data of the plutons yield ages in the range 480-690 Ma wiLh initia1 87Sr/86Sr ratios ranging from 0.70948 -0.71482. Absence of post emplacement tcctonolhennal event is suggested by near concordant K-Ar biotite ages.A protracted thennal event during late Proterozoic-early Palaeozoic (500-700 Ma), possibly related to mantle upwelling, possibly triggered the generation of these granitoids.
Keywords
Geochrmology, Geochemistry, Granitoids, Khasi Hills, Meghalaya.
- Rb-Sr Chronology and Petrochemistry of Granitoids from the South-Eastern Part of the Singhbhum Craton, Orissa
Abstract Views :216 |
PDF Views:1
Authors
Affiliations
1 Geological Survey of India, Calcutta - 700 016, IN
1 Geological Survey of India, Calcutta - 700 016, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 38, No 1 (1991), Pagination: 5-22Abstract
The tonalitic suite of Kaptipada is high-Al2O3 type with a highly fractionated REE pattern suggesting its derivation by partial melting of amphibolite with hornblende as a residual phase. The homblende/biotite-bearing granites of Nilgiri and Ramapahari areas also occurring along the southeastern fringe,are comparatively K-rich than the lonalite-granodiorite suite of Kaptipada. Based on whole rock Rb-Sr isotopic analyses, lhe Kaptipada tonalite-granodiorite suite yields an age of 3275 ± 81 Ma with initial Sr ratio of O.70130± 0.00045; ... the Nilgiri granite, an age of 2366 ± 126Ma with initial Sr ratio of 0.72526 ± 0.00832 and Ramapahari granite, an age of 1895 ± 46 Ma wilh initial Sr ratio of 0.76521 ± 0.00427.
The temporal evolution of the tonalitic rocks of Kaptipada is indistinguishable from the earlier phases of Singhbhum and Bonai granitoids of the Singhbhum Craton. It is concluded that an extensive growth of tonalitic crust took place around 3.3 Ga in the region.
Keywords
Isotopic Study, Rb-Sr Chronology, Geochemistry, Tonalitic Granite, Crustal Evolution, Singhbhum Craton, Orissa.- Some Aspects of National Highway Construction in West Bengal
Abstract Views :139 |
PDF Views:0
Authors
Affiliations
1 Public Works (Roads) Department, Special Road Development Organisation, West Bengal, IN
1 Public Works (Roads) Department, Special Road Development Organisation, West Bengal, IN
Source
Journal of the Association of Engineers, India, Vol 41, No 1-2 (1965), Pagination: 5-14Abstract
Highway construction excluding the construction of structures like culverts and bridges, etc. can be broadly divided into two parts-Embankment and Pavement. If the construction, cost has to be cut down, economy has to be exercised in both the parts and obviously all the operations have to be done in one stage.- Presidential Speech
Abstract Views :139 |
PDF Views:79
Authors
Source
Journal of the Association of Engineers, India, Vol 47, No 1 (1972), Pagination: 51-52Abstract
I convey my sincerest thanks to the authors of different papers for highlighting the different problems of road construction and their suggestions towards their solution. I also thank the discussors for their valuable contribution.Full Text
- A Pilot Study on Evaluation of Standardized Ayurveda formulation Ashwagandhadi lehya as Aphrodisiac and in Treatment of Oligospermia
Abstract Views :168 |
PDF Views:0
Authors
Affiliations
1 Pharmacognosy and Phytochemistry Department, Ramanbhai Patel College of Pharmacy, Charusat, At and Post – Changa, Dist. Anand, Gujarat, 388421, IN
2 J.S. Ayurveda College, College Road, Nadiad, Gujarat, 387001, IN
1 Pharmacognosy and Phytochemistry Department, Ramanbhai Patel College of Pharmacy, Charusat, At and Post – Changa, Dist. Anand, Gujarat, 388421, IN
2 J.S. Ayurveda College, College Road, Nadiad, Gujarat, 387001, IN
Source
Research Journal of Pharmacy and Technology, Vol 12, No 5 (2019), Pagination: 2383-2390Abstract
Ashwagandhadi lehya is traditionally used as aphrodisiac and spermatogenic. It is official in Ayurvedic Formulary of India. Root powder of Withania sominfera is incorporated as one of major ingredients in the formulation. The studies were aimed to evaluate Ashwagandhadi lehya, Clincially, as aphrodisiac and in treatment of Oligospermia. The duration of studies was 90 days and patients showed willingness to participate in studies were asked to submit blood and serum samples on 0, 45th and 90th day. Alteration in serum FSH, serum LH, serum testosterone as well as alteration in sperm concentration, % of normal sperms and % motile sperms in semen samples were selected as evaluation parameters to assess role of Ashwagandhadi lehya in treatment of oligospermia. Aphrodisiac potential of the formulation was evaluated by recording the responses of patients in a questioner, prepared on the basis of International Index of Erectile Function (IIEF- 5), included their experience in sexual desire, erection, penile rigidity, ejaculation and orgasm before and after treatment. The results showed that mean serum concentration of testosterone was increased by 8.31 % after 45 days of treatment and 16.53 % after 90 days of treatment, without concurrent alteration in serum FSH and serum LH concentration. Semen analysis showed that, after 90 days of treatment, mean sperm concentration in semen was increased by 200%, while % of normal sperms and % motile sperms were found to be increased by 11% and 59 %, respectively. The results of the studies showed, statistically significant improvement in sexual arousal, penile rigidity, orgasm and ejaculation, after treatment. As, testosterone concentration was increased in absence of increased LH release, it was concluded that formulation might act directly on testis and stimulated the expression of the proteins responsible for testosterone synthesis. It was also proposed that, increased in serum testosterone level might be responsible for aphrodisiac potential of Ashwagndhadi Lehya.Keywords
Ashwagandhadi lehya, Vajikaran, Oligospermia, Spermatogenic, Aphrodisiac, Withania somifera.References
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