Proceedings of the Indian Academy of Sciences
Earth and Planetary Sciences

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Vol. 99, January-December 1990
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Contents

March 1, 1990
Pages
A perspective on experimental petrology — Alok K. Gupta            
 5-19
Experimental Petrology: Quantitative boundaries for petrogenesis —Peter J. Wyllie            
 21-37
Patent mantle-metasomatism: inferences based on experimental studies — Y. Thibault and A. D. Edgar        
  39-48
Clinopyroxene on the join CaMgSi2O6-CaFe3 + AlSiO6-CaTiAl2O6 at low oxygen fugacity — Masahide Akasaka 
49-55
Phase equilibria study of the system nepheline-diopside under variable pressures (up to 28 kbar) and temperatures — Puniti Singh,Rajeev Chopra and Alok K. Gupta          
57-80
A review and assessment of experiments on Kimberlites, Lamproites and
Lamprophyres as a guide to their origin 
Stephen F Foley
81-90
Experimental study on the tremolite-pargasite join at variable temperatures
under lOkbarTakanobu Oba         
91-98
High pressure-temperature studies on an olivine tholeiite and a tholeiitic picrite from the Pavagarh Region, Gujarat (India) — Snehmani Agrawal, M. M. Bindal and Alok K. Gupta          
99-117
Application of infrared spectroscopy to studies of silicate glass structure: examples from the melilite glasses and the systems Na2O-SiO2 and Na2O-Al2O3-SiO2 — W. R. Taylor  
119-132
Problems of pressure estimation in high temperature experiments using solid media apparatus with particular reference to piston-cylinder and anvil-with-hole apparatus (Part I) — Robert A. Ishbulatov and Alexander V. Kosyakov
133-140
Redox state of the upper mantle — Arnold A. Kadik       
141-152
The role of oxidation-reduction and C-H-O fluids in determining melting conditions and magma compositions in the upper mantle — D. H. Green 
153-165
June 2, 1990

Indus Tsangpo suture zone in Ladakh—its tectonostratigraphy and tectonics —
V. C. Thakur
169-185
Tectonics of the ophiolite belt from Naga Hills and Andaman Islands, India —  S. K. Acharyya, K. K. Ray and B. Sengupta 
187-199
Deformational history of the Precambrian Kolar Schist Belt, South India: Constraints for the tectonic evolution —  Dilip K. Mukhopadhyay 
201-213
Deformation style in the Granulite-charnockite province of South India: An example from the Kusulmalai area in Salem district, Tamil Nadu, India — Deepak C. Srivastava       
215-228
Singhbhum Shear zone: Structural transition and a kinematic model — S. K. Ghosh and Sudipta Sengupta     
229-247
Structural pattern in the Precambrian rocks of Sonua-Lotapahar region, North Singhbhum, eastern India —Dhruba Mukhopadhyay, Tapas Bhattacharya, Tapan Chakraborty and Arun Kami Dey     
249-268
Chhotanagpur Granite Gneiss in relation to the schistose rocks around Murhu, Ranchi district, Bihar: a structural approach — D. S. Bhattacharyya, Anjan Ghosal and V. Ravi Kant      
269-277
Structural studies in the Pre-Vindhyan rocks of Rajasthan: A summary of work of the last three decades — K. Naha and S. Mohanty      
279-290
Influence of differential basement mobility on contrasting structural styles in the cover rocks: An example from Early Precambrian rocks east of Udaipur,Rajasthan — A. B. Roy and D. K. Nagori
291-308
Structural characteristics of the rocks of the Delhi Supergroup with special reference to interference patterns: An appraisal with some examples from Central Rajasthan — P. K. Gangopadhyay and A. Lahari
309-320
C dependent oblateness of deformed pebbles in the Baraitha conglomerate, Central India and tectonic implications — Prakash P. Roday, Gopal Maheshwari and Narendra H. Vaghmarey      
321-338
Internal geometry of a thrust sheet, eastern Proterozoic belt, Godavari Valley, South India —Dilip Saha      
339-355
 September 3, 1990

Seamounts in the Central Indian Ocean Basin: indicators of the Indian plate movement — Ranadhir Mukhopadhyay and N. H. Khadge
357-365
High saline waters in Bay of Bengal — S. K. Sasamal      
367-381
Toroidal oscillations of a transradially isotropic elastic sphere — Alka Gupta and Sarva Jit Singh       
383-391
Air-sea interaction over the tropical Indian Ocean during several contrasting monsoon seasons — Ramesh Kumar and J. S. Sastry      
393-404
Variability of the Sq focus position in the South American continent — R. P. Kane        
405-412
Vertical structure and characteristics of 23-60 day (zonal) oscillations over the tropical latitudes during the winter months of 1986—Results of equatorial wave campaign—II —  R. Raghavarao, R. Suhasini, R. Sridharan, B. V. Krishnamurthy and O. P. Nagpal      
413-423
Entrainment of circumpolar water in the Indian Ocean region of the Antarctic — G. S. Sharma and Benny N. Peter    
425-438
December 4, 1990

Magnetotellurics: Principles and practice — K. Vozoff      
441-471
Inversion of potential field data —P. S. Moharir        
473-514
Magnetics in geoexploration — William J. Hinze and R. R. B. Von Frese      
515-547
Magnetic anomalies of two-dimensional bodies and algorithms for magnetic inversion of dykes and basement topographies — I. V. Radhakrishna Murthy
549-579
Study of the crust and mantle using magnetic surveys by Magsat and other satellites — Robert A. Langel       
581-618
Magsat studies over the Indian region — B. P. Singh and Mita Rajaram     
619-637
Electromagnetometry at the sea floor — Jiro Segawa and Hiroaki Toh   
639-656
Application of the telluric and magnetotelluric methods in selection of sites for nuclear plants — A. Adam and J. Vero     
657-667
Palaeomagnetism and rock magnetism of the Deccan traps — C. Radhakrishnamurty and
K. V. Subbarao       
669-680
Magnetometer array studies in India: Present status, data interpretation and assessment of numerical modelling results — B. R. Arora      
693-716
Electrical structure of the crust in South Eastern Tibet — M. Menvielle and J. L. Le Mouel        
717-738



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