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Chakravarthi, V.
- Petrography and Geochemistry of the Krishna Lamproite Field, Andhra Pradesh
Abstract Views :218 |
PDF Views:2
Authors
Affiliations
1 Geological Survey of India, 3-5-170/G, Narayanguda, Hyderabad - 500 029, IN
2 Geological Survey of India, Hyderabad - 500 068, IN
1 Geological Survey of India, 3-5-170/G, Narayanguda, Hyderabad - 500 029, IN
2 Geological Survey of India, Hyderabad - 500 068, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 61, No 2 (2003), Pagination: 131-146Abstract
Search for primary source rocks of diamond in close proximity of the well known alluvial gravel workings for diamonds along the palaeochannels of the River Krishna, has resulted in the discovery of a lamproite field comprising several lamproite clan rocks in parts of Krishna and Nalgonda districts of Andhra Pradesh (South India). These rare rock types are defined in this work as 'lamproites', on the basis of their occurrence in a unique tectonic setting and containing one or more of the typomorphic minerals and having the requisite rock geochemical characters of members of the suite as a whole. These bodies with an exotic and diagnostic mineralogy, composition and textures occur in a complex tectonic setting with unique intrusive history. The discovery of this lamproite field is considered very significant from the point of diamond exploration as it is located very close to the famous Golconda Mines along the banks of the River Krishna which yielded many of the celebrated diamonds in the past. This field is christened "Krishna Lamproite Field", in view of the proximity of the lamproite occurrences to the Krishna River having the alluvial placer diamonds. These rocks are emplaced along the eastern margin of the Precambrian Dharwar Craton, at the contact between the northeastern periphery of the Proterozoic Cuddapah Basin and the Archaean crystalline basement rocks, in the form of dykes (usually in clusters) and plugged conduits. The emplacement is controlled by major faultslfractures, trending in NNW-SSE and WNW-ESE directions and occur closely associated with mafic (dolerite) dykes and followed the same channels for their emplacement. The lamproites contain glass, numerous vesicles, and xenoliths of the basement granite-gneiss, dolerite and probably platformal sediments of the Cuddapah Basin, besides exhibiting fragmental and pyroclastic textures supgestive of near-surface emplacement. Radiometric age determinations suggests emplacement of these lamproites took place around 1224±14 Ma, probably during the reactivation of major crustal lineaments coinciding with the uplift of the mid-Proterozoic Nallamalai sediments of the Cuddapah Basin.Diopside, phlogopite, tetra-ferri phlogopite, richterite, sanidine, apatite and pseudomorphs of leucite, enstatite and olivine are the major primary constituent minerals present. Diopside-leucite-lamproite, phlogopite-leucitelamproite, olivine-lamproite and richterite-phlogopite-lamproites are the variants. The bodies are ultrapotassic (molar K2O/Na2O >10), and contain high TiO2, P2O5, K2O, MgO, Ba, Sr, Zr, Cr, Ni, La and Ce, pointing to crystallisation from typical lamproite magma. The presence of mantle peridotite xenoliths and xenocrystic minerals such as chromediopside, spinel and garnet indicate deep seated mantle derivation of the Krishna lamproites.
Keywords
Lamproites, Petrology And Geochemistry, Emplacement, Major Faults/Fractures, Krishna Lamproite Field, Andhra Pradesh.- Petrography and Geochemistry of the Krishna Lamproite Field, Andhra Pradesh
Abstract Views :177 |
PDF Views:126
Authors
A. R. Nambiar
1,
T. Ajit Kumar Reddy
2,
M. Sridhar
2,
S. Ravi
2,
V. Chakravarthi
2,
S. Neelakantam
2
Affiliations
1 Geological Survey of India, Op.: Karnataka and Goa, Vasudha Bhavan, Bangalore - 560 078, IN
2 3-5-17Q/G, Narayanguda, Hyderabad - 500 029, IN
1 Geological Survey of India, Op.: Karnataka and Goa, Vasudha Bhavan, Bangalore - 560 078, IN
2 3-5-17Q/G, Narayanguda, Hyderabad - 500 029, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 62, No 2 (2003), Pagination: 255-256Abstract
No Abstract.- Effectiveness of Modified Trunk Dissociation Retrainer in Improving Trunk Control in Subjects with Infantile Hemiplegia
Abstract Views :144 |
PDF Views:0
Authors
Affiliations
1 Saveetha College of Physiotherapy, Saveetha University, Chennai, IN
2 Madhav College of Physiotherapy, Madhav University, IN
1 Saveetha College of Physiotherapy, Saveetha University, Chennai, IN
2 Madhav College of Physiotherapy, Madhav University, IN
Source
Research Journal of Pharmacy and Technology, Vol 12, No 3 (2019), Pagination: 1141-1144Abstract
Aim of the study is to find the effectiveness of Modified Trunk Dissociation Retrainer in improving trunk control in infantile hemiplegic subjects and objective is to determine trunk control following trunk dissociation retraining in infantile hemiplegic subjects. Sample size is 10 selected based on inclusion and exclusion criteria with convenient sampling method from out-patient department of SMCH, Chennai. Study design: Quasi experimental study. Materials required: Modified Trunk Dissociation Retrainer. Outcome measures: trunk control measurement scale. A baseline measurement of trunk control is taken before intervention. Intervention was given by researcher for a duration of 3 weeks as 5 days/week. After the 3rd week of intervention first post-test was taken and second post-test in the 6th week. Analysis of post-test values showed that there was significant difference between pre-test and post-test values and also the results sustained from post-test I and post-test II values. Hence the conclusion the study was that the Modified Trunk Dissociation Retrainer is an effective tool to improve trunk control in subjects with infantile hemiplegia.Keywords
Modified Trunk Dissociation Retrainer, Infantile Hemiplegia, Trunk Control Measurement.References
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