HIMALAYAN GEOLOGY

Volume 10

Chief Editor : R.C. Misra

Executive Editor : A.K. Sinha

Asstt. Editor : A.K. Dubey

MembersV.C. Thakur J.T. GerganN.S. Virdi K.S. BistS. Kumar N.S. Gururajan

WADIA INSTITUTE OF HIMALAYAN GEOLOGYDEHRA DUN

1980

Issued—December 1982

UNIVERSiTATSBlBLIOTriEKHANNOVER

TECHNISCHEINFORMATiONSBiSUOTHEK

CONTENTSPage

PREFACE ///

WERNER SCHWAN

Short Outline of Facts and Problems—The Evolution of IslandArc/Marginal Sea Systems ... \

B.N. RAINA, U.C. PATI and N. SRIMALPhases of Himalayan Orogeny ... j2

WERNER SCHWANSmall-Scale Shortening Structures in Eastern and North-western Himalayan Regions and their Indications of the MajorTectonics and the Deformational History of the Orogene ... 24

V.J. GUPTA and RAMESH C. KANWARBiostratigraphy in Relation to Tectonics of Himalayas ... 47

N.S. VIRDIProblem of the Root-Zone of Nappes in the Western Himalaya—A Critical Review ... 55

HAKIM RAIOrigin and Emplacement of Ladakh Batholith : Present DayKnowledge ... 78

D.K. BHATTA Schematic Model for the Tectonism of the Pir Panjal Rangevis-a-vis the Sedimentation of Karewa in the Kashmir Valley ... 94

M.G. ARUR and B.S. RAJALStudy of Recent Crustal Movements Across Shali Thrust in theArea of Shanan (Joginder Nagar) in Himachal Pradesh ... 106

A. BHATTACHARYA, D.K. JUGRAN

Geology and Structure in Parts of Parbati-Hurla Valley, KuluDistrict, H.P. ... 116

Vi

R.C. DBY

Some Observations on the Main Boundary Fault in H.P.Himalaya \ . ' •!'

O.N. BHARGAVA

The Tectonic Windows of the Lesser Himalaya

V.K GAIROLA and R.JC. SAXENA

i Structural Analysis of the Area Around Satpuli, Pauri GarhwalU.P.

S.C. DOVAL and P.S. SAKLANI

A Note on the Study of Minor Structures in Rocks of SrinagarArea, Garhwal Himalaya, U.P.

M.N. SAXENA-... U •., .-;• ,

^ Orogenic and Epeirogenic Cycles in the Himalaya

S.S. NEGI, A.K. SINHAX " , • > • . ' • • • - . . . .

" A Preliminary Report on the Geology and Structure of theRudraprayag-Tilwara-Mayali Area of Garhwal Himalaya

P.N. RAO and U.C. PATI

Geology and Tectonics of Bhilangana Valley and its AdjoiningParts, Garhwal Himalaya, with Special Reference to the MainCentral Thrust , , .

S. VARADARAJAN and R.S. RAWAT

Sulphide Mineralisation, Origin and its Relation to Magmatism,Deformation and Metamorphism in the Rudraprayag area|

;,,- Chamoli District, Garhwal Himalaya, U.P., India '

GOPENDRA KUMAR

Structural Framework and Tectonic Evolution of Kumaun^'Himalaya, Uttar Pradesh

B.K. PANDBY, V.P. SINGH, S.K. KWATRA and V.B. BHANOT

Rb-Sr ISotopic-••.Studies'on the Granitic and Gneissic Rocks of- ' Baijnath Crystallines, Kumaun Himalaya (U.P.) . .;

126

135

156

178

191

211

220

234

241

" •256

vit

DlLEEP K. MlSRA •'•• •'•

Nature of the Ramgarh Thrust and Tectonic Position ofAmritpur Granite in the Okhal-Kanda-Kalaagar area, Nainital'District, Kumaun Lesser Himalaya ..... , 264

A. AHMAD, A. SAXENA and B.K. SIDDHANTA

Structural Analysis of Eastern Kumaun Himalaya and RelatedProblems . • ... . 280

S.P.H. SYCHANTHAVONG and A.N. SHAH

Tectonic Evolution and Stress Conditions in the Developmentof the Kathmandu Nappe and Kathmandu Basin, NepalHimalaya ... 304

RAVINDRA KUMAR

Structure of Lead Zinc Prospect area of Ganesh Himal inCentral Nepal ... 326

P.K. GANGOPADHYAY and SIBSADHAN RAY

Tectonic Framework of the \Rangit Window' Around Namchi,South Sikkim ... 338

C. TRIPATHI, B.D. DUNGRAKOTI, L.S. JAIN, S.C. KAURA, S. BABUROY and N.S. LAXMIPATHI

Geology of Dirang-Doimara Area, Kameng District, ArunachalPradesh with Special Reference to Structure and Tectonics ... 353

C. TRIPATHI, R.K. GAUR, M. TIWARI, J. SANKAR and B.D.

DUNGRAKOTI

On the Geology of Sipi-Mara Window, Arunachal Pradesh ... 366

R.K. ROY and R.N. KACKER

Tectonic Analysis of Naga Hills Orogenic Belt Along EasternPeri-Indian Suture ... 374

SURENDAR KUMAR

Geodynamic Interpretation of Tuting-Dewangiri Lineament inthe Eastern Himalaya ... 403

via

S.K. ACHARYYAStructural Framework and Tectonic Evolution of the EasternHimalaya ... 412

S.V. SRIKANTIAStructural Framework and Tectonic Evolution of Kashmirand Himachal Himalaya ... 440

K.S. BIST and A.K. SINHASome Observations on the Geological and Structural Setup ofOkhimath Area in Garhwal Himalaya—A Preliminary Report ... 467